Engineering Oxygen Vacancies in IrOX Clusters Supported on Metal-Organic Framework Derived Porous CeO2 for Enhanced Oxygen Evolution in Acidic Media

Article Multidisciplinary Sciences

Dynamic rhenium dopant boosts ruthenium oxide for durable oxygen evolution

Huanyu Jin et al.

Summary: In this study, a new heteroatom-doping method is reported, which utilizes dynamic electron accepting-donating to enhance the activity and stability of RuO2 catalysts for acidic oxygen evolution reaction.

NATURE COMMUNICATIONS (2023)

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Review Chemistry, Multidisciplinary

Engineering Heterogeneous Catalysis with Strong Metal-Support Interactions: Characterization, Theory and Manipulation

Tiancheng Pu et al.

Summary: Strong metal-support interactions (SMSI) is a classic yet fast-growing area in catalysis research. By regulating the interfacial interactions, SMSI phenomenon can encapsulate and stabilize metal nanoparticles, significantly impacting catalytic performance. Engineering SMSI provides a promising approach to steer catalytic performance and tackle energy and environmental challenges effectively.

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION (2023)

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Review Chemistry, Multidisciplinary

Formation, Detection, and Function of Oxygen Vacancy in Metal Oxides for Solar Energy Conversion

Zhiliang Wang et al.

Summary: Oxygen vacancy (V-O) is a common defect in metal oxides that provides unique physiochemical properties. Understanding its formation, structure, and function remains challenging, highlighting the importance of studying defect formation energy and structure in V-O research. This review critically revisits the electronic property and structure changes of MOs upon the generation of Vo, providing insights for future research directions in rational control of V-O in MOs for solar energy conversion.

ADVANCED FUNCTIONAL MATERIALS (2022)

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Article Chemistry, Multidisciplinary

Distinct Crystal-Facet-Dependent Behaviors for Single-Atom Palladium-On-Ceria Catalysts: Enhanced Stabilization and Catalytic Properties

Botao Hu et al.

Summary: This study investigates the evolution of Pd species on different crystal facets of CeO2 and discovers vastly different behaviors on the single-atomic dispersion of surface Pd atoms. The findings demonstrate the crucial role of crystal-facet effects in the preparation of metal-atom-on-metal-oxide SACs, and provide insights for the rational design and targeted synthesis of ultrastable and sinter-resistant SACs.

ADVANCED MATERIALS (2022)

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Article Chemistry, Multidisciplinary

Self-Assembly of Ir-Based Nanosheets with Ordered Interlayer Space for Enhanced Electrocatalytic Water Oxidation

Lianhai Zu et al.

Summary: In this work, ultrathin Ir-IrOx/C nanosheets with ordered interlayer space were synthesized through a nanoconfined self-assembly strategy, exhibiting enhanced catalytic activity for acidic oxygen evolution reactions. The nanosheets showed one of the lowest overpotential during OER in an acid medium, benefiting from their mixed-valence states, rich electrophilic oxygen species, and favorable mesostructured architectures. This study opens a new avenue for designing high-performance 2D ordered mesoporous electrocatalysts for water oxidation and beyond through a nanoconfined self-assembly strategy.

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY (2022)

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Article Chemistry, Multidisciplinary

Strong Oxide-Support Interaction over IrO2/V2O5 for Efficient pH-Universal Water Splitting

Xiaozhong Zheng et al.

Summary: In this study, constructing strong oxide-support interaction (SOSI), ultrafine iridium oxide nanoclusters were anchored on a vanadium oxide support, leading to significant performance enhancement in the oxygen evolution reaction (OER). The distorted IrO2 active sites in the catalyst facilitate the O-O coupling process, resulting in low overpotentials and high-performance water electrolysis over a broad pH range. SOSI also ensures the stability of the catalyst.

ADVANCED SCIENCE (2022)

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Article Chemistry, Multidisciplinary

Structurally Disordered RuO2 Nanosheets with Rich Oxygen Vacancies for Enhanced Nitrate Electroreduction to Ammonia

Yuting Wang et al.

Summary: Carbon-supported RuO2 nanosheets with adjustable crystallinity show high efficiency and selectivity in nitrate reduction to ammonia, outperforming crystalline counterparts.

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION (2022)

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Article Chemistry, Physical

Activating copper oxide for stable electrocatalytic ammonia oxidation reaction via in-situ introducing oxygen vacancies

Jingjing Huang et al.

Summary: This study reports a method for converting inactive CuO into efficient EAOR catalysts through defect engineering, achieving high stability. The presence of Vo on the CuO surface causes an upshift of the d-band center of active Cu site, stabilizing reaction intermediates and efficiently oxidizing NH3 into N-2. This Vo-modulated CuO exhibits a catalytic mechanism different from conventional Pt-based catalysts.

NANO RESEARCH (2022)

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Article Multidisciplinary Sciences

The synergistic effect of Hf-O-Ru bonds and oxygen vacancies in Ru/HfO2 for enhanced hydrogen evolution

Guangkai Li et al.

Summary: A highly efficient Ru/HfO2 electrocatalyst with tuned Ru-O-Hf bonds and oxygen vacancies has been developed, showing high activities for alkaline H2 evolution.

NATURE COMMUNICATIONS (2022)

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Article Nanoscience & Nanotechnology

Conversion of Catalytically Inert 2D Bismuth Oxide Nanosheets for Effective Electrochemical Hydrogen Evolution Reaction Catalysis via Oxygen Vacancy Concentration Modulation

Ziyang Wu et al.

Summary: This study investigates the influence of oxygen vacancies (V-o) on the hydrogen evolution reaction (HER) activity using Bi2O3 as a model material. The results show that an appropriate concentration of V-o enhances the HER performance, while higher concentrations result in a significant drop in activity. By adjusting the treatment time, the V-o concentration in the Bi2O3 catalyst can be controlled, leading to enhanced HER performance.

NANO-MICRO LETTERS (2022)

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Article Multidisciplinary Sciences

Subnanometric Ru clusters with upshifted D band center improve performance for alkaline hydrogen evolution reaction

Qi Hu et al.

Summary: The research shows that the size of Ru clusters affects their water dissociation activity, with subnanometric Ru clusters exhibiting stronger water dissociation ability and superior hydrogen evolution activity compared to single atoms and larger nanoparticles.

NATURE COMMUNICATIONS (2022)

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Article Chemistry, Multidisciplinary

Enhanced Acidic Water Oxidation by Dynamic Migration of Oxygen Species at the Ir/Nb2O5-x Catalyst/Support Interfaces

Zhaoping Shi et al.

Summary: The interaction between catalyst and support is crucial in acidic oxygen evolution catalysis. The traditional interpretations based on strain or electron donation effects are insufficient. In this study, we found that the dynamic migration of oxygen species between different catalysts plays a vital role in regulating the catalytic performance.

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION (2022)

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Article Chemistry, Physical

Non-equilibrium synthesis of stacking faults-abundant Ru nanoparticles towards electrocatalytic water splitting

Rui Jiang et al.

Summary: In this study, Ru nanoparticles with abundant stacking faults (SFs) were synthesized for the first time combining ultrafast heating with rapid quenching. Theoretical calculations demonstrated the synergistic effect of the SFs and induced continuous strain field on the catalytic performance.

APPLIED CATALYSIS B-ENVIRONMENTAL (2022)

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Article Chemistry, Physical

Stabilizing Pt Electrocatalysts via Introducing Reducible Oxide Support as Reservoir of Electrons and Oxygen Species

Liting Yang et al.

Summary: This study addresses the degradation issue of Pt-based catalysts by employing intelligent catalyst design. By introducing Nb2O5 as a reservoir, the Pt-Nb2O5 catalyst exhibits excellent stability even at high voltages, thanks to the corrosion resistance of Nb2O5 and strong metal-support interactions.

ACS CATALYSIS (2022)

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Article Chemistry, Physical

Understanding Structural Incorporation of Oxygen Vacancies in Perovskite Cobaltite Films and Potential Consequences for Electrocatalysis

Lei Jin et al.

Summary: Layered oxygen-deficient perovskite oxides have great potential as efficient cathodes for solid oxide fuel cells and anodes for water oxidation. This study uses atomic-resolution transmission electron microscopy to directly observe oxygen vacancies and their ordering in (Pr,Ba)CoO3-delta films. It is found that oxygen vacancies have ordering in the Co-O and A-O planes, and the interplanar spacings in the AO-AO planes are linearly correlated with the vacancy concentration in the Co-O planes.

CHEMISTRY OF MATERIALS (2022)

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Article Chemistry, Physical

Vacancy Control in TiNb2O7: Implications for Energy Applications

Albert A. Voskanyan et al.

Summary: Reduction of titanium niobium oxide can significantly increase its electronic conductivity, opening new possibilities for the development of niobium-based conductive materials for next-generation energy storage. Additionally, titanium niobium oxide demonstrates outstanding potential for thermochemical CO2 splitting.

CHEMISTRY OF MATERIALS (2022)

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Article Chemistry, Physical

Non-equilibrium synthesis of stacking faults-abundant Ru nanoparticles towards electrocatalytic water splitting

Rui Jiang et al.

Summary: This study synthesized Ru nanoparticles with abundant stacking faults (SFs) for electrocatalysis, showcasing enhanced water splitting rate and providing insights into the synthesis process and performance mechanism.

APPLIED CATALYSIS B-ENVIRONMENTAL (2022)

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Article Chemistry, Multidisciplinary

Engineering Lattice Oxygen Activation of Iridium Clusters Stabilized on Amorphous Bimetal Borides Array for Oxygen Evolution Reaction

Chen Wang et al.

Summary: This study reports an efficient oxygen evolution reaction (OER) catalyst that combines iridium clusters and high-valence cobalt species, achieving non-concerted proton-electron transfer at the atomic scale to trigger OER activity at multiple active sites. Experimental evidence confirms the importance of lattice oxygen oxidation mechanism, while theoretical simulations suggest that the catalyst's OER performance is mainly dominated by the LOM pathway, facilitating reaction kinetics.

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION (2021)

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Article Nanoscience & Nanotechnology

Torsion strained iridium oxide for efficient acidic water oxidation in proton exchange membrane electrolyzers

Shaoyun Hao et al.

Summary: This study presents a torsion-strained Ta0.1Tm0.1Ir0.8O2-delta nanocatalyst with abundant grain boundaries, which exhibits a low overpotential for oxygen evolution reaction. By tuning the adsorption energy of oxygen intermediates, this nanocatalyst shows enhanced catalytic activity. The proton exchange membrane electrolyser using this nanocatalyst can operate stably for 500 hours with a cost of US$1/kg of H-2, achieving a lower cost target set by the US Department of Energy.

NATURE NANOTECHNOLOGY (2021)

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Article Multidisciplinary Sciences

Restructuring highly electron-deficient metal-metal oxides for boosting stability in acidic oxygen evolution reaction

Xinghui Liu et al.

Summary: This study successfully enhanced the stability and performance of catalysts in acidic media by introducing electron-deficient metal surfaces, providing a new strategy for the design of other metal-semiconductor nanocatalysts.

NATURE COMMUNICATIONS (2021)

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Article Multidisciplinary Sciences

Coordination environment dependent selectivity of single-site-Cu enriched crystalline porous catalysts in CO2 reduction to CH4

Yu Zhang et al.

Summary: The study demonstrates that the ECR selectivity depends strongly on the Cu site coordination environment in crystalline porous catalysts, with Cu-DBC showing higher selectivity and activity due to the lower energy barriers of Cu-O-4 sites during the ECR process. This provides a platform for constructing highly selective ECR catalysts with potential applications in the energy conversion field.

NATURE COMMUNICATIONS (2021)

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Article Chemistry, Physical

In-situ reconstructed Ru atom array on α-MnO2 with enhanced performance for acidic water oxidation

Chao Lin et al.

Summary: The use of Ru/MnO2 electrocatalyst has shown high activity and outstanding stability for the oxygen evolution reaction, confirming a mechanism involving only *O and *OH intermediates, with excellent overall performance.

NATURE CATALYSIS (2021)

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Article Chemistry, Physical

Extraordinary acidic oxygen evolution on new phase 3R-iridium oxide

Zhenglong Fan et al.

Summary: This study demonstrated the successful preparation of a new 3R phase IrO2 using a microwave-assisted mechano-thermal method, showing its outstanding catalytic activity and stability for oxygen evolution reaction in acidic electrolyte.

JOULE (2021)

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Article Multidisciplinary Sciences

On the limitations in assessing stability of oxygen evolution catalysts using aqueous model electrochemical cells

Julius Knoeppel et al.

Summary: Recent research shows a severe difference in the dissolution of oxygen evolution reaction catalysts in aqueous model systems and membrane electrode assemblies. The main contributors to this dissolution discrepancy are identified as the overestimated acidity in the anode catalyst layer and the stabilization of catalysts over time in real devices.

NATURE COMMUNICATIONS (2021)

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Article Chemistry, Multidisciplinary

Sodium-Decorated Amorphous/Crystalline RuO2 with Rich Oxygen Vacancies: A Robust pH-Universal Oxygen Evolution Electrocatalyst

Lijie Zhang et al.

Summary: The study developed sodium-decorated amorphous/crystalline RuO2 with rich oxygen vacancies as a pH-universal OER electrocatalyst, showing remarkable acid resistance and high catalytic stability. The introduction of Na dopant and oxygen vacancy in RuO2 was found to lower the energy barrier for OER by weakening the adsorption strength of the OER intermediates.

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION (2021)

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Article Chemistry, Multidisciplinary

Increasing Iridium Oxide Activity for the Oxygen Evolution Reaction with Hafnium Modification

Fang Zhao et al.

Summary: The synthesis and implementation of highly active, stable, and affordable electrocatalysts for the oxygen evolution reaction (OER) is a major challenge in developing energy conversion devices. A highly active hafnium-modified iridium oxide (IrHfxOy) electrocatalyst was reported in this study, showing significantly increased activity compared to traditional iridium oxide electrocatalysts. Operando surface enhanced Raman spectroscopy (SERS) and DFT calculations revealed the key mechanisms behind the enhanced OER performance of the IrHfxOy catalyst.

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY (2021)

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Article Electrochemistry

Electrochemical Active Surface Area Determination of Iridium-Based Mixed Oxides by Mercury Underpotential Deposition

Silvia Duran et al.

Summary: ECSA is a critical property to describe, analyze and compare electrocatalysts, and Hg-UPD method can be used to estimate ECSA for ultraporous electrocatalysts with excellent reproducibility. The method shows promise for stability and degradation monitoring of electrocatalysts.

CHEMELECTROCHEM (2021)

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Review Chemistry, Physical

Defect Engineering on CeO2-Based Catalysts for Heterogeneous Catalytic Applications

Chunming Yang et al.

Summary: CeO2-based catalysts with crystal defects play a vital role in heterogeneous catalysis, and researchers have developed various defect introduction methods to synthesize efficient catalysts. The structure-activity relationship between defect engineering and catalytic performance is emphasized in this review.

SMALL STRUCTURES (2021)

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Review Chemistry, Physical

Metal-Organic Framework-Based Materials for Energy Conversion and Storage

Tianjie Qiu et al.

ACS ENERGY LETTERS (2020)

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Article Chemistry, Physical

First Example of Protonation of Ruddlesden-Popper Sr2IrO4: A Route to Enhanced Water Oxidation Catalysts

Ronghuang Zhang et al.

CHEMISTRY OF MATERIALS (2020)

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Article Chemistry, Physical

The roles of oxygen vacancies in electrocatalytic oxygen evolution reaction

Kaiyue Zhu et al.

NANO ENERGY (2020)

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Article Energy & Fuels

Structural transformation of highly active metal-organic framework electrocatalysts during the oxygen evolution reaction

Shenlong Zhao et al.

NATURE ENERGY (2020)

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Article Chemistry, Multidisciplinary

Breaking Long-Range Order in Iridium Oxide by Alkali Ion for Efficient Water Oxidation

Jiajian Gao et al.

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY (2019)

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Editorial Material Energy & Fuels

Considerations for the scaling-up of water splitting catalysts

Jakob Kibsgaard et al.

NATURE ENERGY (2019)

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Article Chemistry, Inorganic & Nuclear

Mixed-Valence Ce-BPyDC Metal-Organic Framework with Dual Enzyme-like Activities for Colorimetric Biosensing

Linpin Luo et al.

INORGANIC CHEMISTRY (2019)

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Review Chemistry, Multidisciplinary

Modulating Electronic Structures of Inorganic Nanomaterials for Efficient Electrocatalytic Water Splitting

Xinchuan Du et al.

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION (2019)

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Article Multidisciplinary Sciences

Chromium-ruthenium oxide solid solution electrocatalyst for highly efficient oxygen evolution reaction in acidic media

Yichao Lin et al.

NATURE COMMUNICATIONS (2019)

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Article Chemistry, Multidisciplinary

Charge-Redistribution-Enhanced Nanocrystalline Ru@IrOx Electrocatalysts for Oxygen Evolution in Acidic Media

Jieqiong Shan et al.

CHEM (2019)

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Review Materials Science, Multidisciplinary

Strategies to Break the Scaling Relation toward Enhanced Oxygen Electrocatalysis

Zhen-Feng Huang et al.

MATTER (2019)

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Review Chemistry, Multidisciplinary

Metal Catalysts for Heterogeneous Catalysis: From Single Atoms to Nanoclusters and Nanoparticles

Lichen Liu et al.

CHEMICAL REVIEWS (2018)

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Article Chemistry, Physical

Oxygen vacancies driven size-dependent d0 room temperature ferromagnetism in well-dispersed dopant-free ZnO nanoparticles and density functional theory calculation

Yong Sun et al.

JOURNAL OF ALLOYS AND COMPOUNDS (2018)

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Article Chemistry, Physical

Low-Temperature CO2 Methanation over CeO2-Supported Ru Single Atoms, Nanoclusters, and Nanoparticles Competitively Tuned by Strong Metal-Support Interactions and H-Spillover Effect

Yu Guo et al.

ACS CATALYSIS (2018)

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Article Chemistry, Physical

A Facile Strategy to Construct Amorphous Spinel-Based Electrocatalysts with Massive Oxygen Vacancies Using Ionic Liquid Dopant

Jing Sun et al.

ADVANCED ENERGY MATERIALS (2018)

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Article Multidisciplinary Sciences

Efficient oxygen evolution electrocatalysis in acid by a perovskite with face-sharing IrO6 octahedral dimers

Lan Yang et al.

NATURE COMMUNICATIONS (2018)

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Article Chemistry, Physical

The stability number as a metric for electrocatalyst stability benchmarking

Simon Geiger et al.

NATURE CATALYSIS (2018)

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A unique oxygen ligand environment facilitates water oxidation in hole-doped IrNiOx core-shell electrocatalysts

Hong Nhan Nong et al.

NATURE CATALYSIS (2018)

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The Reaction Mechanism with Free Energy Barriers at Constant Potentials for the Oxygen Evolution Reaction at the IrO2 (110) Surface

Yuan Ping et al.

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY (2017)

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Article Chemistry, Multidisciplinary

Electrochemical Dissolution of Iridium and Iridium Oxide Particles in Acidic Media: Transmission Electron Microscopy, Electrochemical Flow Cell Coupled to Inductively Coupled Plasma Mass Spectrometry, and X-ray Absorption Spectroscopy Study

Primoz Jovanovic et al.

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY (2017)

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Activating lattice oxygen redox reactions in metal oxides to catalyse oxygen evolution

Alexis Grimaud et al.

NATURE CHEMISTRY (2017)

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Combining theory and experiment in electrocatalysis: Insights into materials design

Zhi Wei Seh et al.

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Balancing activity, stability and conductivity of nanoporous core-shell iridium/iridium oxide oxygen evolution catalysts

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Article Engineering, Environmental

Fe doped CeO2 nanosheets for catalytic oxidation of 1,2-dichloroethane: Effect of preparation method

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CHEMICAL ENGINEERING JOURNAL (2017)

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Iridium-Based Multimetallic Porous Hollow Nanocrystals for Efficient Overall-Water-Splitting Catalysis

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Synthesis and Characterization of New Ce(IV)-MOFs Exhibiting Various Framework Topologies

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CRYSTAL GROWTH & DESIGN (2017)

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Mercury Underpotential Deposition to Determine Iridium and Iridium Oxide Electrochemical Surface Areas

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A highly active and stable IrOx/SrIrO3 catalyst for the oxygen evolution reaction

Linsey C. Seitz et al.

SCIENCE (2016)

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Iridium-based double perovskites for efficient water oxidation in acid media

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NATURE COMMUNICATIONS (2016)

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Proceedings Paper Electrochemistry

Gas Crossover Mitigation in PEM Water Electrolysis: Hydrogen Cross-over Benchmark Study of 3M's Ir-NSTF Based Electrolysis Catalyst-Coated Membranes

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POLYMER ELECTROLYTE FUEL CELLS 16 (PEFC 16) (2016)

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Universality in Oxygen Evolution Electrocatalysis on Oxide Surfaces

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Probing Defect Sites on CeO2 Nanocrystals with Well-Defined Surface Planes by Raman Spectroscopy and O2 Adsorption

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LANGMUIR (2010)

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Engineering Oxygen Vacancies in IrOX Clusters Supported on Metal-Organic Framework Derived Porous CeO2 for Enhanced Oxygen Evolution in Acidic Media

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