Water splitting performance of metal and non-metal-doped transition metal oxide electrocatalysts

Coordination Chemistry Reviews, Год журнала: 2022, Номер 474, С. 214864 - 214864

Опубликована: Окт. 12, 2022

Язык: Английский

---

Long‐Term Stability Challenges and Opportunities in Acidic Oxygen Evolution Electrocatalysis

Angewandte Chemie International Edition, Год журнала: 2022, Номер 62(11)

Опубликована: Дек. 22, 2022

Abstract Polymer electrolyte membrane water electrolysis (PEMWE) has been regarded as a promising technology for renewable hydrogen production. However, acidic oxygen evolution reaction (OER) catalysts with long‐term stability impose grand challenge in its large‐scale industrialization. In this review, critical factors that may lead to catalyst's instability couple potential solutions are comprehensively discussed, including mechanical peeling, substrate corrosion, active‐site over‐oxidation/dissolution, reconstruction, oxide crystal structure collapse through the lattice oxygen‐participated pathway, etc. Last but not least, personal prospects provided terms of rigorous evaluation criteria, situ / operando characterizations, economic feasibility and practical electrolyzer consideration, highlighting ternary relationship evolution, industrial‐relevant activity serve roadmap towards ultimate application PEMWE.

Язык: Английский

---

Fundamental Understanding of Structural Reconstruction Behaviors in Oxygen Evolution Reaction Electrocatalysts

Advanced Energy Materials, Год журнала: 2023, Номер 13(31)

Опубликована: Июнь 29, 2023

Abstract Transition metal‐based oxyhydroxides (MOOH) derived from the irreversible structural reconstruction of precatalysts are often acknowledged as real catalytic species for oxygen evolution reaction (OER). Typically, reconstruction‐derived MOOH would exhibit superior OER activity compared to their directly synthesized counterparts, despite being fundamentally similar in chemistry. As such, has emerged a promising strategy boost electrocatalysts. However, in‐depth understanding origin reconstructed materials still remains ambiguous, which significantly hinders further developments highly efficient electrocatalysts based on In this review, comprehensive overview behaviors reported is provided and intrinsic chemical origins high efficiency toward unveiled. The fundamentals mechanisms, along with recommended characterization techniques dynamic process analyzing structure also interpreted. Finally, view chemistry, potential perspectives facilitate design synthesis durable electrocatalyst presented.

Язык: Английский

---

Facet Engineering of Advanced Electrocatalysts Toward Hydrogen/Oxygen Evolution Reactions

Nano-Micro Letters, Год журнала: 2023, Номер 15(1)

Опубликована: Фев. 16, 2023

The electrocatalytic water splitting technology can generate high-purity hydrogen without emitting carbon dioxide, which is in favor of relieving environmental pollution and energy crisis achieving neutrality. Electrocatalysts effectively reduce the reaction barrier increase efficiency. Facet engineering considered as a promising strategy controlling ratio desired crystal planes on surface. Owing to anisotropy, with different orientations usually feature facet-dependent physical chemical properties, leading differences adsorption energies oxygen or intermediates, thus exhibit varied activity toward evolution (HER) (OER). In this review, brief introduction basic concepts, fundamental understanding mechanisms well key evaluating parameters for both HER OER are provided. formation facets comprehensively overviewed aiming give scientific theory guides realize dominant planes. Subsequently, three strategies selective capping agent, etching coordination modulation tune summarized. Then, we present an overview significant contributions facet-engineered catalysts HER, OER, overall splitting. particular, highlight that density functional calculations play indispensable role unveiling structure–activity correlation between plane catalytic activity. Finally, remaining challenges provided future prospects designing advanced electrocatalysts discussed.

Язык: Английский

---

Defect Engineered Metal–Organic Framework with Accelerated Structural Transformation for Efficient Oxygen Evolution Reaction

Angewandte Chemie International Edition, Год журнала: 2023, Номер 62(43)

Опубликована: Сен. 6, 2023

Metal-organic frameworks (MOFs) have been increasingly applied in oxygen evolution reaction (OER), and the surface of MOFs usually undergoes structural transformation to form metal oxyhydroxides serve as catalytically active sites. However, controllable regulation reconstruction process remains a great challenge. Here we report defect engineering strategy facilitate during OER with enhanced activity. Defective (denoted NiFc'x Fc1-x ) abundant unsaturated sites are constructed by mixing ligands 1,1'-ferrocene dicarboxylic acid (Fc') defective ferrocene carboxylic (Fc). series more prone be transformed compared non-defective (NiFc'). Moreover, as-formed derived from contain vacancies. NiFc'Fc grown on nickel foam exhibits excellent catalytic activity an overpotential 213 mV at current density 100 mA cm-2 , superior that undefective NiFc'. Experimental results theoretical calculations suggest vacancies adsorption oxygen-containing intermediates centers, thus significantly improving

Язык: Английский

---

Vacancy Defects in 2D Transition Metal Dichalcogenide Electrocatalysts: From Aggregated to Atomic Configuration

Advanced Materials, Год журнала: 2022, Номер 35(50)

Опубликована: Окт. 3, 2022

Abstract Vacancy defect engineering has been well leveraged to flexibly shape comprehensive physicochemical properties of diverse catalysts. In particular, growing research effort devoted chalcogen anionic vacancies (S/Se/Te) 2D transition metal dichalcogenides (2D TMDs) toward the ultimate performance limit electrocatalytic hydrogen evolution reaction (HER). spite remarkable progress achieved in past decade, systematic and in‐depth insights into state‐of‐the‐art vacancy for 2D‐TMDs‐based electrocatalysis are still lacking. Herein, this review delivers a full picture evolving from aggregated atomic configurations covering their development background, controllable manufacturing, thorough characterization, representative HER application. Of particular interest, deep‐seated correlations between specific regulation routes resulting catalytic improvement logically clarified terms rearrangement, charge redistribution, energy band variation, intermediate adsorption–desorption optimization, charge/mass transfer facilitation. Beyond that, broader vision is cast cutting‐edge fields vacancy‐engineering‐based single‐atom catalysis dynamic structure–performance across catalyst service lifetime. Together with critical discussion on residual challenges future prospects, sheds new light rational design advanced catalysts navigates application high‐efficiency conversion storage fields.

Язык: Английский

---

Lamella-heterostructured nanoporous bimetallic iron-cobalt alloy/oxyhydroxide and cerium oxynitride electrodes as stable catalysts for oxygen evolution

Nature Communications, Год журнала: 2023, Номер 14(1)

Опубликована: Март 31, 2023

Developing robust nonprecious-metal electrocatalysts with high activity towards sluggish oxygen-evolution reaction is paramount for large-scale hydrogen production via electrochemical water splitting. Here we report that self-supported laminate composite electrodes composed of alternating nanoporous bimetallic iron-cobalt alloy/oxyhydroxide and cerium oxynitride (FeCo/CeO2-xNx) heterolamellas hold great promise as highly efficient alkaline reaction. By virtue three-dimensional architecture to offer abundant accessible electroactive CoFeOOH/CeO2-xNx heterostructure interfaces through facilitating electron transfer mass transport, FeCo/CeO2-xNx exhibit superior electrocatalysis in 1 M KOH, ultralow Tafel slope ~33 mV dec-1. At overpotential low 360 mV, they reach >3900 mA cm-2 retain exceptional stability at ~1900 >1000 h, outperforming commercial RuO2 some representative oxygen-evolution-reaction catalysts recently reported. These properties make them attractive candidates electrolysis generation.

Язык: Английский

---

Surface reconstruction and directed electron transport in NiSe2/MoSe2 Mott-Schottky heterojunction catalysts promote urea-assisted water splitting

Applied Catalysis B Environment and Energy, Год журнала: 2023, Номер 341, С. 123312 - 123312

Опубликована: Сен. 20, 2023

Язык: Английский

---

A Mini Review on Transition Metal Chalcogenides for Electrocatalytic Water Splitting: Bridging Material Design and Practical Application

Energy & Fuels, Год журнала: 2023, Номер 37(4), С. 2608 - 2630

Опубликована: Фев. 2, 2023

Hydrogen is believed to be one of the essential clean secondary energy sources in structure revolution both industry and daily life. Driven by renewable electricity such as solar wind power, water electrolysis for hydrogen production deemed main processes green future academia industry. Transition metal chalcogenides (TMCs) are promising candidates replace noble metals earth-abundant electrocatalysts splitting. However, it remains challenging further improve electrocatalytic activity long-term stability TMCs, especially a practical electrolyzer. This Review summarizes recent advances strategies optimizing activities TMCs toward splitting well latest investigations on surface reconstructions during electrolysis. The performances cells particularly discussed. Finally, concluding remark perspective provided, we hope inspire works this area, narrowing gap between material design application.

Язык: Английский

---

Ag_xZn_y Protective Coatings with Selective Zn²⁺/H⁺ Binding Enable Reversible Zn Anodes

Nano Letters, Год журнала: 2023, Номер 23(13), С. 6156 - 6163

Опубликована: Июнь 28, 2023

Zinc (Zn) metal anodes suffer from the dendrite growth and hydrogen evolution reaction (HER) in classical aqueous electrolytes, which severely limit their lifespan. We propose a rational design of AgxZny protective coatings with selective binding to Zn2+ against H+ simultaneously regulate Zn pattern HER kinetics. further demonstrate that by tuning composition coating deposition behavior can be readily tuned conventional plating/stripping (on Zn-AgZn3 coating) alloying/dealloying Ag-AgZn coating), resulting precise control pattern. Moreover, synergy Ag suppresses competitive HER. As result, modified possess significantly enhanced This work provides new strategy for enhancing stability potentially other precisely manipulating strength protons charge carriers batteries.

Язык: Английский

---