Support and Interface Effects in Water‐Splitting Electrocatalysts

Advanced Materials, Год журнала: 2019, Номер 31(31)

Опубликована: Март 6, 2019

Water-splitting electrolyzers that can convert electricity into storable hydrogen are a fascinating and scalable energy conversion technology for the utilization of renewable energies. To speed up sluggish oxygen evolution reactions (HER OER), electrocatalysts essential reducing their kinetic barriers eventually improving efficiency. As efficient strategies modulating binding ability water-splitting intermediates on electrocatalyst surface, support effect interface drawing growing attention. Herein, some recent research progress effects in HER, OER, overall is highlighted. Specifically, correlation between electronic interaction constituent components electrocatalytic performance profoundly discussed, with aim advancing development highly electrocatalysts, which may replace noble-metal-based bring practically widespread reality.

Язык: Английский

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Ultrafast room-temperature synthesis of porous S-doped Ni/Fe (oxy)hydroxide electrodes for oxygen evolution catalysis in seawater splitting

Energy & Environmental Science, Год журнала: 2020, Номер 13(10), С. 3439 - 3446

Опубликована: Янв. 1, 2020

A robust oxygen-evolving electrocatalyst for high-performance seawater splitting was developed using a cost-effective and industrially compatible method.

Язык: Английский

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Recent Advances and Prospective in Ruthenium-Based Materials for Electrochemical Water Splitting

ACS Catalysis, Год журнала: 2019, Номер 9(11), С. 9973 - 10011

Опубликована: Сен. 25, 2019

As a highly appealing technology for hydrogen generation, water electrolysis including oxygen evolution reaction (OER) at the anode and (HER) cathode largely depends on availability of efficient electrocatalysts. Accordingly, over past years, much effort has been made to develop various electrocatalysts with superior performance reduced cost. Among them, ruthenium (Ru)-based materials OER HER are very promising because their prominent catalytic activity, pH-universal application, cheapest price among precious metal family, so on. Herein, recent advances in this hot research field comprehensively reviewed. A general description about splitting is presented understand mechanism proposed scaling relations toward activities, key stability issues Ru-based further given. Subsequently, Ru-involving introduced classified into different groups improving or optimizing electrocatalytic properties, special focus several significant bifunctional along simulated electrolyzer. Finally, perspective existing challenges future progress catalysts provided. The main aim here shed some light design construction emerging energy storage conversion technologies.

Язык: Английский

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Non-precious-metal catalysts for alkaline water electrolysis: operando characterizations, theoretical calculations, and recent advances

Chemical Society Reviews, Год журнала: 2020, Номер 49(24), С. 9154 - 9196

Опубликована: Янв. 1, 2020

Advances of non-precious-metal catalysts for alkaline water electrolysis are reviewed, highlighting operando techniques and theoretical calculations in their development.

Язык: Английский

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Recent advances in transition metal-based electrocatalysts for alkaline hydrogen evolution

Journal of Materials Chemistry A, Год журнала: 2019, Номер 7(25), С. 14971 - 15005

Опубликована: Янв. 1, 2019

Transition metal-based electrocatalysts for alkaline hydrogen evolution reaction.

Язык: Английский

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Synergistic coupling of CoFe-LDH arrays with NiFe-LDH nanosheet for highly efficient overall water splitting in alkaline media

Applied Catalysis B Environment and Energy, Год журнала: 2019, Номер 253, С. 131 - 139

Опубликована: Апрель 18, 2019

Язык: Английский

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Boosting oxygen evolution of single-atomic ruthenium through electronic coupling with cobalt-iron layered double hydroxides

Nature Communications, Год журнала: 2019, Номер 10(1)

Опубликована: Апрель 12, 2019

Abstract Single atom catalyst, which contains isolated metal atoms singly dispersed on supports, has great potential for achieving high activity and selectivity in hetero-catalysis electrocatalysis. However, the stability of single their interaction with support still remains a mystery. Here we show stable atomic ruthenium catalyst anchoring surface cobalt iron layered double hydroxides, possesses strong electronic coupling between hydroxides. With 0.45 wt.% loading, exhibits outstanding overpotential 198 mV at current density 10 mA cm −2 small Tafel slope 39 dec −1 oxygen evolution reaction. By using operando X-ray absorption spectroscopy, it is disclosed that was kept under oxidation states 4+ even due to synergetic electron coupling, endow exceptional electrocatalytic simultaneously.

Язык: Английский

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Hydrogen Evolution and Oxidation: Mechanistic Studies and Material Advances

Advanced Materials, Год журнала: 2019, Номер 31(31)

Опубликована: Апрель 1, 2019

Electrochemical energy storage and conversion through hydrogen is essential for a clean sustainable system. Highly efficient electrocatalysts play key role in the electrochemical transformation reactions. A comprehensive understanding of reaction kinetics mechanisms critical catalyst design development. Especially pH-dependent evolution oxidation (HER/HOR) receives increasing interest, its origin adds new knowledge to fundamental electrocatalysis. Here, detailed description kinetic analysis HER/HOR, brief summary about recent development highly cost-effective are presented. Lastly, advances electrocatalysis discussed.

Язык: Английский

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

Nature Communications, Год журнала: 2021, Номер 12(1)

Опубликована: Июль 28, 2021

Abstract Rational design of single atom catalyst is critical for efficient sustainable energy conversion. However, the atomic-level control active sites essential electrocatalytic materials in alkaline electrolyte. Moreover, well-defined surface structures lead to in-depth understanding catalytic mechanisms. Herein, we report a single-atomic-site ruthenium stabilized on defective nickel-iron layered double hydroxide nanosheets (Ru 1 /D-NiFe LDH). Under precise regulation local coordination environments catalytically and existence defects, Ru LDH delivers an ultralow overpotential 18 mV at 10 mA cm −2 hydrogen evolution reaction, surpassing commercial Pt/C catalyst. Density functional theory calculations reveal that optimizes adsorption energies intermediates reaction promotes O–O coupling Ru–O site oxygen reaction. The as ideal model reveals superior water splitting performance with potential development promising water-alkali electrocatalysts.

Язык: Английский

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Single platinum atoms embedded in nanoporous cobalt selenide as electrocatalyst for accelerating hydrogen evolution reaction

Nature Communications, Год журнала: 2019, Номер 10(1)

Опубликована: Апрель 15, 2019

Abstract Designing efficient electrocatalysts for hydrogen evolution reaction is significant renewable and sustainable energy conversion. Here, we report single-atom platinum decorated nanoporous Co 0 . 85 Se (Pt/np-Co Se) as evolution. The achieved Pt/np-Co shows high catalytic performance with a near-zero onset overpotential, low Tafel slope of 35 mV dec −1 , turnover frequency 3.93 s at −100 in neutral media, outperforming commercial Pt/C catalyst other reported transition-metal-based compounds. Operando X-ray absorption spectroscopy studies combined density functional theory calculations indicate that not only can optimize surface states active centers under realistic working conditions, but also significantly reduce barriers water dissociation improve adsorption/desorption behavior hydrogen, which synergistically promote thermodynamics kinetics. This work opens up further opportunities local electronic structures tuning to effectively manipulate its properties by an atomic-level engineering strategy.

Язык: Английский

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