Rational Design of Goethite-Sulfide Nanowire Heterojunctions for High Current Density Water Splitting

Article Chemistry, Multidisciplinary

Electronic Modulation of Metal-Organic Frameworks by Interfacial Bridging for Efficient pH-Universal Hydrogen Evolution

Luqi Wang et al.

Summary: This study reports a facile in situ growth strategy for the synthesis of tightly connected 2D/2D heterostructures by coupling MXene with CoBDC nanosheets. The optimized CoBDC/MXene exhibits superior hydrogen evolution reaction activity.

ADVANCED FUNCTIONAL MATERIALS (2023)

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Article Chemistry, Multidisciplinary

Ultrafast Combustion Synthesis of Robust and Efficient Electrocatalysts for High-Current-Density Water Oxidation

Deshuang Yu et al.

Summary: This study presents a scalable production method for inexpensive, efficient, and robust catalysts for oxygen evolution reaction (OER) by in situ growing a series of metal oxides coupled with Fe2O3 on iron foam via an ultrafast combustion approach. The optimized Ni(OH)2/Fe2O3 catalyst can deliver a high current density of 1000 mA cm-2 at the low overpotential of 271 mV in 1.0 M KOH for up to 1500 h.

ACS NANO (2023)

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Article Engineering, Environmental

Sulphur-dopant induced breaking of the scaling relation on low-valence Ni sites in nickel ferrite nanocones for water oxidation with industrial-level current density

Hai -Jun Liu et al.

Summary: The preparation of sulfur-doped NiFe2O4 nanocone arrays on iron foams (S-NiFe2O4/IF) via a scalable hydrothermal method is described. The 3D nanocone arrays provide a large electrochemical surface area and allow efficient electrolyte access and oxygen escape. Low-valence Ni atoms in tetrahedron sites are found to be more active than high-valence Fe atoms in this S-doped bimetallic catalyst, and the introduction of sulfur enhances water adsorption and dissociation as well as the adsorption of OER intermediates on Ni sites. The optimized S-NiFe2O4/IF catalyst achieves an industrial-level current density of 500 mA cm-2 at an overpotential of 310 mV and maintains stability for 100 hours in alkaline medium. Furthermore, integrating S-NiFe2O4/IF into an anion-exchange membrane water electrolyzer allows for a current density of 1.0 A cm-2 at 1.79 V.

CHEMICAL ENGINEERING JOURNAL (2023)

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Article Chemistry, Multidisciplinary

Optimization of oxygen evolution activity by tuning e*g band broadening in nickel oxyhydroxide

Haoyin Zhong et al.

Summary: This study finds that the synthetic origin of nickel oxyhydroxides plays a crucial role in their activity for the oxygen evolution reaction (OER). It is discovered that a stronger strain leads to a greater distortion of the NiO6 octahedron in NiOOH, resulting in significant broadening of the 3d electron states with e(g) symmetry. This band broadening facilitates electron transfer and enhances catalytic performance. By extending this concept to a NiFe oxyhydroxide system, the universality of this mechanism is demonstrated, providing insights for designing efficient OER electrocatalysts.

ENERGY & ENVIRONMENTAL SCIENCE (2023)

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Article Chemistry, Multidisciplinary

Methanol upgrading coupled with hydrogen product at large current density promoted by strong interfacial interactions

Yixin Hao et al.

Summary: An efficient catalyst comprised of highly dispersed FeNi oxide heterojunctions anchored on nickel foam is synthesized using an ultrafast solution combustion strategy. This catalyst exhibits excellent stability and activity at large current densities for anodic organic upgrading, and achieves high faradaic efficiency in methanol electrooxidation.

ENERGY & ENVIRONMENTAL SCIENCE (2023)

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Review Chemistry, Multidisciplinary

Semiconducting Polymers for Oxygen Evolution Reaction under Light Illumination

Yuanxing Fang et al.

Summary: This review focuses on the photocatalytic technologies and materials of polymeric photocatalysts for the oxygen evolution reaction (OER). Two practical systems, namely particle suspension and film-based photoelectrochemical systems, are discussed. The concept is reviewed in terms of thermodynamics and kinetics, and the key characteristics of polymeric photocatalysts, such as light absorption, charge separation and transfer, and surface oxidation reactions, are examined. Satisfactory OER performance by polymeric photocatalysts could lead to cost-effective, sustainable, and renewable water splitting and other advanced applications using solar energy.

CHEMICAL REVIEWS (2022)

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Article Chemistry, Multidisciplinary

Flower-like NiCo2S4/NiFeP/NF composite material as an effective electrocatalyst with high overall water splitting performance

Jing Jiang et al.

Summary: This study presents the design and synthesis of a unique three-dimensional electrocatalyst for water splitting. The electrocatalyst exhibits excellent catalytic activity and stability for the oxygen evolution reaction (OER) and hydrogen evolution reaction (HER) in alkaline conditions. The optimized sample shows higher stability at higher voltages and current densities, accelerating the overall water splitting process.

CHINESE CHEMICAL LETTERS (2022)

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Article Chemistry, Multidisciplinary

Metal-Organic Framework-Derived Hollow CoSx Nanoarray Coupled with NiFe Layered Double Hydroxides as Efficient Bifunctional Electrocatalyst for Overall Water Splitting

Yun Jae Lee et al.

Summary: In this study, a bifunctional electrocatalyst composed of hollow CoSx and Ni-Fe based layered double hydroxide (NiFe LDH) nanosheets was developed for efficient overall water splitting. The catalyst exhibits excellent HER and OER activities with low overpotentials and good durability.

SMALL (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 Nanoscience & Nanotechnology

Interface Engineering of NixSx@MnOxHy Nanorods to Efficiently Enhance Overall-Water-Splitting Activity and Stability

Pan Wang et al.

Summary: A three-dimensional core-shell NixSy@MnOxHy/NF bifunctional electrocatalyst, synthesized using interface engineering and shell-protection strategy, exhibits exceptional activity and stability for overall water splitting.

NANO-MICRO LETTERS (2022)

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Article Engineering, Environmental

Ni3S2-embedded NiFe LDH porous nanosheets with abundant heterointerfaces for high-current water electrolysis

Shu-Wen Wu et al.

Summary: Ni3S2-embedded NiFe LDH heterostructured porous nanosheets show excellent catalytic performance in oxygen evolution reaction, and the strategy can be extended to fabricate Ru-Ni3S2-NiFe LDH electrocatalyst for high active hydrogen evolution reaction, which provides a new strategy for the preparation of non-precious metal electrocatalysts.

CHEMICAL ENGINEERING JOURNAL (2022)

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Article Chemistry, Multidisciplinary

In Situ Reconstructed Zn doped FexNi(1-x)OOH Catalyst for Efficient and Ultrastable Oxygen Evolution Reaction at High Current Densities

Xian Zhang et al.

Summary: In this study, a robust and high output Zn-doped NiOOH-FeOOH (Zn-FexNi(1-x))OOH catalyst is developed by electro-oxidation-induced reconstruction. The reconstructed electrode exhibits superior corrosion resistance, enhanced catalytic activity, and bonding force at the catalyst-support interface. This work provides insights into the electrocatalyst reconstruction during the OER process and facilitates the design of high-performance OER catalysts.

SMALL (2022)

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Article Chemistry, Multidisciplinary

Deciphering the Space Charge Effect of the p-n Junction between Copper Sulfides and Molybdenum Selenides for Efficient Water Electrolysis in a Wide pH Range

Mingzheng Gu et al.

Summary: Researchers designed and synthesized a core-shell structure material CuS@MoSe2, which greatly improves electron transfer and conductivity through the space charge effect and has abundant active interfaces. The material exhibits good electrocatalytic performance in water oxidation.

ACS NANO (2022)

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Article Engineering, Environmental

Energy-efficient monosaccharides electrooxidation coupled with green hydrogen production by bifunctional Co9S8/Ni3S2 electrode

Yunpeng Liu et al.

Summary: Water electrolysis is a sustainable strategy for renewable energy conversion and storage, but its commercialization faces difficulties. This study found that coupling the hydrogen evolution reaction with the electrooxidation of xylose can significantly reduce the energy consumption of water electrolysis, providing a promising strategy for biomass electrooxidation coupled with hydrogen production.

CHEMICAL ENGINEERING JOURNAL (2022)

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Article Chemistry, Physical

Self-Derivation and Surface Reconstruction of Fe-Doped Ni3S2 Electrode Realizing High-Efficient and Stable Overall Water and Urea Electrolysis

Derun Li et al.

Summary: This study presents a simple self-derivation method to fabricate a Fe-doped Ni3S2 electrode with impressive trifunctional catalytic activity for the oxygen evolution reaction, urea oxidation reaction, and hydrogen evolution reaction. The durability of this electrode is high, and in situ Raman spectra confirm that the incorporation of Fe inhibits S dissolution and facilitates catalyst reconstruction. It is also found that the doping of Fe optimizes the adsorption and accelerates the OER process. Furthermore, the two-electrode electrolyzer exhibits remarkable durability for both water and urea splitting, making it promising for industrial applications.

ADVANCED ENERGY MATERIALS (2022)

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Article Engineering, Environmental

In-situ construction of Co/CoSe Schottky heterojunction with interfacial electron redistribution to facilitate oxygen electrocatalysis bifunctionality for zinc-air batteries

Kaiqi Li et al.

Summary: In this study, a facile method was used to fabricate Co/CoSe heterojunctions embedded in carbon, which can accelerate charge transfer and enhance the electrocatalytic activities for oxygen reduction and oxygen evolution. The zinc-air battery with the as-prepared Co/CoSe heterojunction exhibited better performance than the Pt/RuO2-based counterpart, demonstrating its potential for practical applications.

CHEMICAL ENGINEERING JOURNAL (2022)

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Article Chemistry, Multidisciplinary

Understanding the electrocatalytic mechanism of self-template formation of hierarchical Co9S8/Ni3S2 heterojunctions for highly selective electroreduction of nitrobenzene

Xuanping Wang et al.

Summary: In this study, a self-supporting nanosheet catalyst was designed based on metal sulfide heterojunctions for the reduction of nitroarenes in aqueous solution. The catalyst exhibited efficient reduction performance and excellent functional group tolerance. Mechanistic investigations revealed that electron transfer from Ni3S2 to Co9S8 was beneficial for the reaction and reduced the energy barrier for the reduction of nitroarenes.

CHEMICAL SCIENCE (2022)

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Article Chemistry, Physical

Rational design of core-shell-structured CoPx@FeOOH for efficient seawater electrolysis

Libo Wu et al.

Summary: The core-shell-structured CoPx@FeOOH catalyst designed for seawater electrolysis for hydrogen generation demonstrates excellent catalytic activity, high conductivity, large surface area, improved turnover frequency, optimal absorption energy to OER intermediates, enhanced chemical stability, and corrosion resistance. The CoPx||CoPx@FeOOH pair also shows great promise for fuel-gas production from seawater, with high Faradaic efficiency and low overpotentials required for certain current densities.

APPLIED CATALYSIS B-ENVIRONMENTAL (2021)

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Article Chemistry, Physical

Interfacial engineering of the NiSe2/FeSe2 p-p heterojunction for promoting oxygen evolution reaction and electrocatalytic urea oxidation

Shan Ni et al.

Summary: The constructed NiSe2/FeSe2 p-p heterojunction exhibits superior electrocatalytic activity for both OER and UOR, showcasing low overpotentials and high current densities compared to other selenides and even RuO2. The designed built-in electric field and self-driven electron transfer at the heterointerface contribute to the exceptional performance of the electrocatalyst.

APPLIED CATALYSIS B-ENVIRONMENTAL (2021)

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Article Chemistry, Physical

Integrating well-controlled core-shell structures into superaerophobic electrodes for water oxidation at large current densities

Qi Hu et al.

Summary: The newly developed electrode with karst topography features is able to rapidly release oxygen bubbles generated at high current density. The strategy allows effective control over the formation of core-shell structure for promoting the heterointerface synergetic effect of Ni(0)@Ni(II).

APPLIED CATALYSIS B-ENVIRONMENTAL (2021)

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Article Engineering, Environmental

Mott-Schottky heterojunction of Co/Co2P with built-in electric fields for bifunctional oxygen electrocatalysis and zinc-air battery

Haoqi Yang et al.

Summary: A high-performance bifunctional electrocatalyst composed of Co/Co2P nanoparticles encapsulated in nitrogen and phosphorus co-doped carbon nanotubes (NPCNTs) has been successfully synthesized via a mechanochemistry-pyrolysis approach. The catalyst exhibits outstanding ORR/OER activities, high power density, and cycling life, making it a promising cathode material for rechargeable ZABs. Theoretical calculations support the enhanced electron transport and improved intermediate adsorption in the electrocatalytic process.

CHEMICAL ENGINEERING JOURNAL (2021)

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Article Engineering, Environmental

In situ construction of Fe(Co)OOH through ultra-fast electrochemical activation as real catalytic species for enhanced water oxidation

Ruo-Yao Fan et al.

Summary: In this study, bimetallic hydroxyl oxides with excellent oxygen evolution reaction (OER) performance were successfully constructed through one-step rapid electrochemical activation, showing advantages in stability and activity. This work provides a new design inspiration for the synthesis of bimetallic hydroxyl oxides with good dispersion, high activity, and long-term stability.

CHEMICAL ENGINEERING JOURNAL (2021)

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Article Chemistry, Multidisciplinary

Tip-Enhanced Electric Field: A New Mechanism Promoting Mass Transfer in Oxygen Evolution Reactions

Peng Liu et al.

Summary: In this study, NiFe alloy nanocone arrays were used to enhance the oxygen evolution reaction (OER) rate and outperform state-of-the-art OER electrocatalysts. The high-curvature tips on the nanocones induce a local electric field that significantly increases the concentration of hydroxide ions near the active sites, promoting OER activity. This local field enhanced OER kinetics is suggested to be a generic effect applicable to other OER catalysts.

ADVANCED MATERIALS (2021)

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Article Chemistry, Physical

Schottky Heterojunction Nanosheet Array Achieving High-Current-Density Oxygen Evolution for Industrial Water Splitting Electrolyzers

Qunlei Wen et al.

Summary: Versatile catalyst system composed of dispersed NiFe hydroxide nanoparticles and ultrathin NiS nanosheets exhibits remarkable oxygen evolution reaction (OER) activity at high current density under industrial conditions. Theoretical calculations demonstrate the cooperative regulation of mass transport and electronic structure, leading to favorable OER kinetics and stable cell performance in water splitting electrolyzer.

ADVANCED ENERGY MATERIALS (2021)

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Article Chemistry, Physical

S-doped nickel-iron hydroxides synthesized by room-temperature electrochemical activation for efficient oxygen evolution

Ya-Nan Zhou et al.

Summary: Anion doping with S in NiFe-based layered double hydroxide catalysts was synthesized through a novel electrochemical activation strategy, leading to enhanced oxygen evolution reaction performance. This work demonstrates the significant potential of anion doping for catalyst design and optimization.

APPLIED CATALYSIS B-ENVIRONMENTAL (2021)

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Review Chemistry, Multidisciplinary

Structural Transformation of Heterogeneous Materials for Electrocatalytic Oxygen Evolution Reaction

Hui Ding et al.

Summary: Electrochemical water splitting for hydrogen generation is a promising pathway for renewable energy conversion. Developing cost-effective and highly efficient electrocatalysts to drive sluggish oxygen-evolution reaction (OER) at the anode side is crucial. The investigation of structural transformation during OER contributes to understanding accurate catalytic mechanisms and benefiting the rational design of catalytic materials.

CHEMICAL REVIEWS (2021)

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Review Chemistry, Inorganic & Nuclear

Heterojunction catalyst in electrocatalytic water splitting

Zhenxing Li et al.

Summary: The article summarizes the design strategies and synthesis methods of various heterojunction catalysts, as well as their applications in the water splitting process. By briefly discussing the current progress in electrocatalytic water splitting, it provides a prospect for the future of heterojunction catalysts in this field.

COORDINATION CHEMISTRY REVIEWS (2021)

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Article Chemistry, Multidisciplinary

Interfacial electronic coupling of ultrathin transition-metal hydroxide nanosheets with layered MXenes as a new prototype for platinum-like hydrogen evolution

Linlin Li et al.

Summary: Metal hydroxides@MXene hybrids were introduced as efficient electrocatalysts for the alkaline HER, showing Pt-like catalytic activity and excellent stability. The interfacial electronic coupling between transition-metal hydroxides and MXene nanosheets plays a crucial role in optimizing the adsorption energy of water and hydrogen. This study highlights the great potential of interfacial electronic coupling in developing advanced electrocatalysts for applications in energy-related fields.

ENERGY & ENVIRONMENTAL SCIENCE (2021)

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Article Chemistry, Physical

Design of Ni3N/Co2N heterojunctions for boosting electrocatalytic alkaline overall water splitting

Yan Wen et al.

Summary: Transition metal nitrides (TMNs) are promising electrocatalysts for overall water splitting, and a novel bi-functional electrocatalyst N-NiCo-LDH has been developed through density functional theory calculations, showing excellent catalytic activity for hydrogen and oxygen evolution reactions. Adjusting the relative concentrations of pyridine nitrogen and metal ions in N-NiCo-LDH can synergistically promote the electrocatalytic process, providing insights into the corresponding synergistic mechanism.

JOURNAL OF MATERIALS CHEMISTRY A (2021)

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Review Chemistry, Multidisciplinary