Oxygen Evolution/Reduction Reaction Catalysts: From In Situ Monitoring and Reaction Mechanisms to Rational Design

Chemical Reviews, Journal Year: 2023, Volume and Issue: 123(9), P. 6257 - 6358

Published: March 21, 2023

The oxygen evolution reaction (OER) and reduction (ORR) are core steps of various energy conversion storage systems. However, their sluggish kinetics, i.e., the demanding multielectron transfer processes, still render OER/ORR catalysts less efficient for practical applications. Moreover, complexity catalyst–electrolyte interface makes a comprehensive understanding intrinsic mechanisms challenging. Fortunately, recent advances in situ/operando characterization techniques have facilitated kinetic monitoring under conditions. Here we provide selected highlights mechanistic studies with main emphasis placed on heterogeneous systems (primarily discussing first-row transition metals which operate basic conditions), followed by brief outlook molecular catalysts. Key sections this review focused determination true active species, identification sites, reactive intermediates. For in-depth insights into above factors, short overview metrics accurate characterizations is provided. A combination obtained time-resolved information reliable activity data will then guide rational design new Strategies such as optimizing restructuring process well overcoming adsorption-energy scaling relations be discussed. Finally, pending current challenges prospects toward development homogeneous presented.

Language: Английский

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A corrosion-resistant RuMoNi catalyst for efficient and long-lasting seawater oxidation and anion exchange membrane electrolyzer

Nature Communications, Journal Year: 2023, Volume and Issue: 14(1)

Published: June 17, 2023

Direct seawater electrolysis is promising for sustainable hydrogen gas (H2) production. However, the chloride ions in lead to side reactions and corrosion, which result a low efficiency poor stability of electrocatalyst hinder use technology. Here we report corrosion-resistant RuMoNi electrocatalyst, situ-formed molybdate on its surface repel ions. The works stably over 3000 h at high current density 500 mA cm-2 alkaline electrolytes. Using catalyst an anion exchange membrane electrolyzer, energy conversion 77.9% 1000 1.72 V. calculated price per gallon gasoline equivalent (GGE) H2 produced $ 0.85, lower than 2026 technical target 2.0/GGE set by United Stated Department Energy, thus, suggesting practicability

Language: Английский

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Routes to high-performance layered oxide cathodes for sodium-ion batteries

Chemical Society Reviews, Journal Year: 2024, Volume and Issue: 53(8), P. 4230 - 4301

Published: Jan. 1, 2024

Various optimization strategies are reviewed and summarized to formulate design principles for layered oxide cathodes sodium-ion batteries.

Language: Английский

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Effect of Surface‐Adsorbed and Intercalated (Oxy)anions on the Oxygen Evolution Reaction

Angewandte Chemie International Edition, Journal Year: 2022, Volume and Issue: 61(38)

Published: June 28, 2022

Abstract As the kinetically demanding oxygen evolution reaction (OER) is crucial for decarbonization of our society, a wide range (pre)catalysts with various non‐active‐site elements (e.g., Mo, S, Se, N, P, C, Si…) have been investigated. Thermodynamics dictate that these oxidize during industrial operation. The formed oxyanions are water soluble and thus predominantly leach in reconstruction process. Nevertheless, recently, it was unveiled thermodynamically stable (oxy)anions can adsorb on surface or intercalate interlayer space active catalyst. There, they tune electronic properties sites interact intermediates, changing OER kinetics potentially breaking persisting *OH/*OOH scaling relations. Thus, addition to electrolyte opens new design dimension catalysis herein discussed observations deepen understanding role anions OER.

Language: Английский

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Oxyanion Engineering Suppressed Iron Segregation in Nickel–Iron Catalysts Toward Stable Water Oxidation

Advanced Materials, Journal Year: 2023, Volume and Issue: 35(21)

Published: March 7, 2023

Nickel-iron catalysts represent an appealing platform for electrocatalytic oxygen evolution reaction (OER) in alkaline media because of their high adjustability components and activity. However, long-term stabilities under current density still remain unsatisfactory due to undesirable Fe segregation. Herein, a nitrate ion (NO3- ) tailored strategy is developed mitigate segregation, thereby improve the OER stability nickel-iron catalyst. X-ray absorption spectroscopy combined with theoretical calculations indicate that introducing Ni3 (NO3 )2 (OH)4 stable NO3- lattice conducive constructing interface FeOOH/Ni3 via strong interaction between incorporated . Time flight secondary mass spectrometry wavelet transformation analysis demonstrate catalyst greatly alleviates exhibiting considerably enhanced six-fold improvement over FeOOH/Ni(OH)2 without modification. This work represents momentous step toward regulating segregation stabilizing catalytic performances catalysts.

Language: Английский

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Surface reconstruction of Se-doped NiS2 enables high-efficiency oxygen evolution reaction

Journal of Energy Chemistry, Journal Year: 2023, Volume and Issue: 84, P. 173 - 180

Published: May 22, 2023

Language: Английский

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Controlling dynamic reconstruction chemistry for superior oxygen-evolving catalysts

Chem, Journal Year: 2023, Volume and Issue: 9(7), P. 1645 - 1657

Published: July 1, 2023

Language: Английский

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In Situ Electrochemical Oxyanion Steering of Water Oxidation Electrocatalysts for Optimized Activity and Stability

Advanced Energy Materials, Journal Year: 2023, Volume and Issue: 13(24)

Published: May 4, 2023

Abstract Compared to traditional modulation by metal cations doping, oxyanions offer a higher possibility of mediating the performance electrocatalysts toward oxygen evolution reaction (OER) due their special polyanion configurations and large electronegativity. However, mechanism rules mediation remain poorly understood. Herein, an in situ electrochemical oxyanion (NO 3 − , PO 4 3− SO 2− or SeO ) steering strategy study variation OER for transition‐metal (TM = Ni, Fe, Co) hydroxide is reported. Electrocatalytic experiments indicate both activity stability oxyanion‐modified TM hydroxides follow order > NO . Electrochemical incorporation improves hydroxides. Conversely, doping significantly accelerates leaching thus impairs performance. Theoretical calculations reveal that simultaneously modulates TM‐O covalency TM‐3 d band centers, correlating with This research constructs oxyanion‐mediated rule designing high‐performance energy transformation.

Language: Английский

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High-performance multidimensional-structured N-doped nickel modulated Mo2N/FeOxNy bifunctional electrocatalysts for efficient alkaline seawater splitting

Chemical Engineering Journal, Journal Year: 2024, Volume and Issue: 489, P. 151348 - 151348

Published: April 16, 2024

Language: Английский

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Carbon-quantum-dots-involved Fe/Co/Ni phosphide open nanotubes for high effective seawater electrocatalytic decomposition

Applied Catalysis B Environment and Energy, Journal Year: 2023, Volume and Issue: 326, P. 122403 - 122403

Published: Jan. 18, 2023

Language: Английский

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