Low-Iridium-Content IrIn2 Intermetallics with an Unconventional Face-Centered Orthorhombic Phase for Efficient Overall Water Splitting

Article Chemistry, Physical

Construction of Ordered Atomic Donor-Acceptor Architectures in bcc IrGa Intermetallic Compounds toward Highly Electroactive and Stable Overall Water Splitting

Huaifang Zhang et al.

Summary: Ordered atomic structures and strong d-orbital interactions enable the synthesis of IrGa/N-rGO materials, which exhibit excellent electronic transfer properties and high performance for overall water splitting in alkaline medium.

ADVANCED ENERGY MATERIALS (2023)

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Article Chemistry, Multidisciplinary

Ir Nanoparticles Anchored on Metal-Organic Frameworks for Efficient Overall Water Splitting under pH-Universal Conditions

Jun Yang et al.

Summary: In this study, an advanced electrocatalyst was developed by anchoring well-dispersed Ir nanoparticles on nickel metal-organic framework (MOF) Ni-NDC nanosheets. The synthesized Ir@Ni-NDC exhibited exceptional electrocatalytic performance for hydrogen evolution reaction (HER), oxygen evolution reaction (OER) and overall water splitting in a wide pH range, surpassing commercial benchmarks and most reported electrocatalysts. Theoretical calculations revealed that the charge redistribution of Ni-O-Ir bridge optimized the adsorption of H2O, OH*, and H*, leading to accelerated electrochemical kinetics for HER and OER. This work provides a new clue for the development of bifunctional electrocatalysts for pH-universal overall water splitting.

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION (2023)

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Article Chemistry, Multidisciplinary

Arming Ru with Oxygen-Vacancy-Enriched RuO2 Sub-Nanometer Skin Activates Superior Bifunctionality for pH-Universal Overall Water Splitting

Yapeng Li et al.

Summary: This study proposes an effective modification strategy by coating a sub-nanometer RuO2 layer with abundant oxygen vacancies onto interconnected Ru clusters/carbon hybrid microsheet (Ru@V-RuO2/C HMS). This material inherits the high hydrogen evolution reaction (HER) activity of Ru and activates superior activity toward the oxygen evolution reaction (OER) in both acid and alkaline conditions. The modified material achieves an ultralow overpotential for OER and HER and can drive overall water splitting with an ultrasmall cell voltage.

ADVANCED MATERIALS (2023)

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Review Chemistry, Multidisciplinary

Descriptors for the Evaluation of Electrocatalytic Reactions: d-Band Theory and Beyond

Shilong Jiao et al.

Summary: Closing the carbon, hydrogen, and nitrogen cycle with renewable electricity offers potential solutions for the current environmental and energy crisis, while also supporting the continued prosperity of human society. Descriptors play a crucial role in bridging the gap between the physicochemical factors of electrocatalysts and their enhanced activity, providing guiding principles for the rational design process. By following indicators like d-band center, Delta G(H), E-O*, coordination number (CN), and bond length, it is possible to access the optimal adsorption strength of key intermediates.

ADVANCED FUNCTIONAL MATERIALS (2022)

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Article Chemistry, Multidisciplinary

Synthesis of Pd3Sn and PdCuSn Nanorods with L12 Phase for Highly Efficient Electrocatalytic Ethanol Oxidation

Ming Zhou et al.

Summary: The study presents a facile wet-chemical method to synthesize Pd3Sn nanorods with different crystal phases and demonstrates the ease of tuning the crystal phase by altering precursor types. Additionally, the method is shown to be applicable for synthesizing PdCuSn nanorods with the L1(2) crystal phase, exhibiting superior electrocatalytic performance.

ADVANCED MATERIALS (2022)

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Article Chemistry, Multidisciplinary

Synthesis of N-Doped Highly Graphitic Carbon Urchin-Like Hollow Structures Loaded with Single-Ni Atoms towards Efficient CO2 Electroreduction

Yunxiang Li et al.

Summary: In this study, a reliable Ni-catalyzed and Ni-templated strategy is developed to synthesize a single-atom catalyst with excellent conductivity and large surface area, facilitating electron/mass transfer and exposure of single active sites. The catalyst exhibits remarkable activity and stability for CO2 electroreduction.

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION (2022)

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Article Chemistry, Multidisciplinary

In Situ Anchoring Massive Isolated Pt Atoms at Cationic Vacancies of α-NixFe1-x(OH)2 to Regulate the Electronic Structure for Overall Water Splitting

Liming Wang et al.

Summary: Rational design and preparation of single-atom catalysts can significantly improve the electrocatalytic activity for water splitting. In this work, Pt single atoms were loaded on layered alpha-Ni2/3Fe1/3(OH)(2) with the maximum loading of approx. 6.15 wt%. These Pt single atoms act as active sites for hydrogen evolution reaction and regulate the electronic structure of NiFe hydroxides to activate adjacent Ni atoms for oxygen evolution reaction.

ADVANCED FUNCTIONAL MATERIALS (2022)

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Article Chemistry, Physical

Lattice-Matching Formed Mesoporous Transition Metal Oxide Heterostructures Advance Water Splitting by Active Fe-O-Cu Bridges

Feng Hu et al.

Summary: This study reports a simple method to synthesize efficient bifunctional electrocatalysts that exhibit high catalytic activity and stability in alkaline oxygen/hydrogen evolution reactions. The catalysts have been designed and fabricated with an optimized structure and nanoporous morphology, resulting in low overpotential and high current density.

ADVANCED ENERGY MATERIALS (2022)

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Article Chemistry, Physical

FeCo alloy nanoparticles embedded in N-doped carbon supported on highly defective ketjenblack as effective bifunctional electrocatalysts for rechargeable Zn-air batteries

Kyutae Kim et al.

Summary: The development of highly active non-precious metal-based electrocatalysts is crucial for the practical application of metal-air batteries. In this study, FeCo alloy nanoparticles in N-doped carbon shells were prepared using hydrothermal and annealing processes on a defect-rich carbon support. The FeCoNC/D showed excellent bifunctional electrocatalytic activity for the oxygen reduction reaction (ORR) and oxygen evolution reaction (OER), as well as high specific capacity, power density and long-term cycling stability in a Zn-air secondary battery.

APPLIED CATALYSIS B-ENVIRONMENTAL (2022)

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Article Multidisciplinary Sciences

OH spectator at IrMo intermetallic narrowing activity gap between alkaline and acidic hydrogen evolution reaction

Jiaxi Zhang et al.

Summary: This study presents an IrMo intermetallic electrocatalyst supported on carbon nanotubes that shows similar activity in alkaline and acidic electrolytes, significantly reducing the activity gap between the two media. The use of a stably-adsorbed OH spectator is found to enhance the performance of the electrocatalyst, providing guidance for the design of desirable HER electrocatalysts for alkaline water splitting.

NATURE COMMUNICATIONS (2022)

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Article Chemistry, Multidisciplinary

Exclusive Strain Effect Boosts Overall Water Splitting in PdCu/Ir Core/Shell Nanocrystals

Menggang Li et al.

Summary: In this study, precise synthesis of PdCu/Ir core/shell nanocrystals was reported, which significantly boosted oxygen evolution reaction (OER) through the exclusive strain effect. The compressive strain in the Ir shell downshifted the d-band center and weakened the binding of the intermediates, leading to enhanced OER activity. The strained nanocrystals also exhibited improved hydrogen evolution reaction (HER) activity, making them excellent catalysts for overall water-splitting electrocatalysis.

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION (2021)

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Review Chemistry, Inorganic & Nuclear

Pd-based intermetallic nanocrystals: From precise synthesis to electrocatalytic applications in fuel cells

Sumei Han et al.

Summary: Pd-based intermetallic nanocrystals (INCs) have gained attention as electrocatalysts for fuel cells, showing outstanding catalytic activity and high stability. Research focuses on synthetic methods, morphology control, and applications in electrocatalytic reactions, with strategies to improve performance discussed.

COORDINATION CHEMISTRY REVIEWS (2021)

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Article Chemistry, Multidisciplinary

Significantly Enhanced Overall Water Splitting Performance by Partial Oxidation of Ir through Au Modification in Core-Shell Alloy Structure

Huimin Wang et al.

Summary: Efficient bifunctional electrocatalysts are crucial for overall water splitting in acidic conditions. The core-shell nanoparticles (Au@AuIr2) synthesized in this study showed significantly enhanced OER and HER catalytic properties, achieving high activity and stability in overall water splitting cell. The electronic interaction between Au and Ir on partially oxidized surfaces likely plays a key role in improving catalytic performance.

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY (2021)

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Article Multidisciplinary Sciences

Efficient overall water splitting in acid with anisotropic metal nanosheets

Dongshuang Wu et al.

Summary: The researchers have developed an optimized catalyst RuIr-NC for oxygen evolution reaction, which demonstrates high efficiency and stability in the process of water splitting.

NATURE COMMUNICATIONS (2021)

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Article Chemistry, Physical

Structurally ordered intermetallic Ir3V electrocatalysts for alkaline hydrogen evolution reaction

Lin-Wei Chen et al.

Summary: A structurally ordered Ir3V catalyst has been reported for efficiently catalyzing the hydrogen evolution reaction in alkaline media. The catalyst exhibits significantly enhanced activity compared to commercial Pt and Ir-based catalysts, attributed to the charge redistribution on the ordered Ir3V surface promoting water dissociation.

NANO ENERGY (2021)

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Article Multidisciplinary Sciences

A highly efficient atomically thin curved PdIr bimetallene electrocatalyst

Fan Lv et al.

Summary: The study introduces a new synthetic method for creating an atomic-level PdIr bimetallene with an average thickness of around 1.0 nm, which demonstrates superior catalytic performance in the hydrogen evolution reaction and the formic acid oxidation reaction.

NATIONAL SCIENCE REVIEW (2021)

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Article Chemistry, Physical

Hierarchical porous bowl-like nitrogen-doped carbon supported bimetallic AuPd nanoparticles as nanoreactors for high efficient catalytic oxidation of HMF to FDCA

Wen Guan et al.

Summary: Hierarchical porous bowl-like nitrogen-doped carbon supported AuPd bimetallic nanoreactors were successfully synthesized and used for the efficient catalytic oxidation of HMF to FDCA, achieving a high yield of 97.6%. The rate-determining step was confirmed to be the oxidation of FFCA to FDCA, and regeneration experiments showed that the nanoreactors could be recycled and reused multiple times without losing catalytic activity.

JOURNAL OF CATALYSIS (2021)

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Article Multidisciplinary Sciences

Engineering single-atomic ruthenium catalytic sites on defective nickel-iron layered double hydroxide for overall water splitting

Panlong Zhai et al.

Summary: Rational design of single atom catalyst is critical for efficient sustainable energy conversion. Single-atomic-site ruthenium stabilized on defective nickel-iron layered double hydroxide nanosheets achieve superior HER and OER performance in alkaline media.

NATURE COMMUNICATIONS (2021)

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Article Chemistry, Physical

Mn-Doped RuO2 Nanocrystals as Highly Active Electrocatalysts for Enhanced Oxygen Evolution in Acidic Media

Shi Chen et al.

ACS CATALYSIS (2020)

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Review Chemistry, Physical

Recent Advances on Water-Splitting Electrocatalysis Mediated by Noble-Metal-Based Nanostructured Materials

Yingjie Li et al.

ADVANCED ENERGY MATERIALS (2020)

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Article Chemistry, Multidisciplinary

Synthesis of Palladium-Based Crystalline@Amorphous Core-Shell Nanoplates for Highly Efficient Ethanol Oxidation

Peng-Fei Yin et al.

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Partially hydroxylated ultrathin iridium nanosheets as efficient electrocatalysts for water splitting

Zifang Cheng et al.

NATIONAL SCIENCE REVIEW (2020)

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Selective Surface Reconstruction of a Defective Iridium-Based Catalyst for High-Efficiency Water Splitting

Yecan Pi et al.

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Phase-Selective Epitaxial Growth of Heterophase Nanostructures on Unconventional 2H-Pd Nanoparticles

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Coordination engineering of iridium nanocluster bifunctional electrocatalyst for highly efficient and pH-universal overall water splitting

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Self-Optimized Ligand Effect in L12-PtPdFe Intermetallic for Efficient and Stable Alkaline Hydrogen Oxidation Reaction

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Exploring the impact of atomic lattice deformation on oxygen evolution reactions based on a sub-5 nm pure face-centred cubic high-entropy alloy electrocatalyst

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Intercalated Iridium Diselenide Electrocatalysts for Efficient pH-Universal Water Splitting

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Tuning Surface Structure of Pd3Pb/PtnPb Nanocrystals for Boosting the Methanol Oxidation Reaction

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

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Random Alloyed versus Intermetallic Nanoparticles: A Comparison of Electrocatalytic Performance

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Mesoporous Metallic Iridium Nanosheets

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

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Low-Iridium-Content IrIn2 Intermetallics with an Unconventional Face-Centered Orthorhombic Phase for Efficient Overall Water Splitting

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