Design Principles of Single‐Atom Catalysts for Oxygen Evolution Reaction: From Targeted Structures to Active Sites

Advanced Materials, Journal Year: 2023, Volume and Issue: 36(7)

Published: Sept. 14, 2023

Hydrogen production from electrolytic water electrolysis is considered a viable method for hydrogen with significant social value due to its clean and pollution-free nature, high efficiency, purity, but the anode oxygen evolution reaction (OER) process complex kinetically slow. Single-atom catalysts (SACs) 100% atom utilization homogeneous active sites often exhibit catalytic activity are expected be extensively applied. The performance of OER can further improved by precise regulation structure through electronic effects, coordination environment, heteroatomic doping, so on. In this review, mechanisms under different conditions introduced, latest research progress SACs in field systematically summarized, then effects various structural strategies on discussed, principles ideas design proposed. end, outstanding issues current challenges summarized.

Language: Английский

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Metastabilizing the Ruthenium Clusters by Interfacial Oxygen Vacancies for Boosted Water Splitting Electrocatalysis

Advanced Energy Materials, Journal Year: 2024, Volume and Issue: 14(21)

Published: Feb. 2, 2024

Abstract Metal–support interaction (MSI) is witnessed as an essential manner to stabilize active metals and tune catalytic activity for heterogonous water splitting. Kinetically driving the electrolysis (WE) appeals a rational MSI system with coupled electron‐donating/accepting (e‐D/A) characters hydrogen/oxygen evolution reactions (HER/OER). However, metal stabilization effect by will in turn restrict deblocking of e‐D/A properties challenge full electrocatalytic optimization. This study profiles heterostructure featuring metastable Ru clusters on defective NiFe hydroxide (Ru/d‐NiFe LDH) support low‐precious (≈2 wt%) platform efficient WE. It indicated that interfacial oxygen vacancies can deviate stable 4d 5 orbit 2+δ state, regulate d‐band center levels toward facilitated HER/OER processes. Resultantly, Ru/d‐NiFe LDH attains ultralow overpotentials at 10 mA cm −2 Pt‐beyond alkaline HER (18 mV) OER (220 fast kinetics durability. The symmetrical electrolyzer delivers promising voltage 1.49 V 1 m KOH seawater splitting performance. work carries interesting opportunities rationalizing sophisticated metal‐support electrocatalysts through metal‐site metastabilization engineering.

Language: Английский

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Trends and Prospects of Bulk and Single‐Atom Catalysts for the Oxygen Evolution Reaction

Advanced Energy Materials, Journal Year: 2023, Volume and Issue: 13(17)

Published: March 20, 2023

Abstract Electrolytic hydrogen is expected to play a key role in the production of green fuels and chemicals, while contributing balancing consumption supply future electricity grid relying largely on intermittent renewable sources for energy production. However, oxygen evolution reaction (OER) major bottleneck boosting conversion efficiency due sluggish kinetics four‐electron transfer process. Intensive research efforts are thus directed toward development advanced OER electrocatalysts. This review aims at bringing together recent advances bulk single‐atom electrocatalysts (SACs) OER. Starting from established understanding mechanism, it offers an overview state‐of‐the‐art materials OER, highlighting current directions shortcomings The final part addresses novel SACs, covering their performance as well synthetic routes characterization techniques that shine light geometric electronic configuration SACs. experimental findings complimented with theoretical insights density functional theory (DFT). article concludes summary along opportunities further improve activity SACs

Language: Английский

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Interfacial engineering of CoP/CoS2 heterostructure for efficiently electrocatalytic pH-universal hydrogen production

Journal of Colloid and Interface Science, Journal Year: 2023, Volume and Issue: 652, P. 989 - 996

Published: Aug. 23, 2023

Language: Английский

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Rational Design of Hydrogen Evolution Reaction Electrocatalysts for Commercial Alkaline Water Electrolysis

Small Structures, Journal Year: 2023, Volume and Issue: 4(8)

Published: March 22, 2023

With the further exploitation of renewable energy sources, electrochemical hydrogen evolution reaction (HER) is considered a key technology to solve environmental problems and achieve global carbon neutrality. Currently, alkaline water electrolyzers (AWEs) have been revitalized as traditional electrolytic production industry, yet they face great challenges in achieving new technological breakthroughs due catalytic properties electrode materials. In media, besides slow kinetics oxygen reaction, sluggish HER needing dissociation mass transfer at high current densities are among major factors limiting development electrolysis for industrial applications. Therefore, it importance design electrocatalysts with activity stability (>500 mA cm −2 ) applications “Research Development level” (R&D level). Herein, brief overview AWEs scale presented, some mainstream recognized catalysis mechanisms electrolytes summarized. Based on requirements application theoretical guidance, activation strategies also This review will propose insights into future electrolysis.

Language: Английский

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Low-Pt supported on MOF-derived Ni(OH)2 with highly-efficiently electrocatalytic seawater splitting at high current density

Applied Catalysis B Environment and Energy, Journal Year: 2023, Volume and Issue: 331, P. 122703 - 122703

Published: March 31, 2023

Language: Английский

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Photo‐self‐Fenton Reaction Mediated by Atomically Dispersed Ag−Co Photocatalysts toward Efficient Degradation of Organic Pollutants

Angewandte Chemie International Edition, Journal Year: 2024, Volume and Issue: 63(8)

Published: Jan. 8, 2024

Achieving the complete mineralization of persistent pollutants in wastewater is still a big challenge. Here, we propose an efficient photo-self-Fenton reaction for degradation different using high-density (Ag: 22 wt %) atomically dispersed AgCo dual sites embedded graphic carbon nitride (AgCo-CN). Comprehensive experimental measurements and density functional theory (DFT) calculations demonstrate that Ag Co AgCo-CN play critical role accelerating photoinduced charge separation forming self-Fenton redox centers, respectively. The bimetallic exhibited excellent photocatalytic performance toward phenol even under extreme conditions due to pathway situ generation hydrogen peroxide producing main active oxygen species (⋅OH

Language: Английский

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Ambient Electrosynthesis toward Single‐Atom Sites for Electrocatalytic Green Hydrogen Cycling

Advanced Materials, Journal Year: 2023, Volume and Issue: 35(14)

Published: Feb. 17, 2023

With the ultimate atomic utilization, well-defined configuration of active sites and unique electronic properties, catalysts with single-atom (SASs) exhibit appealing performance for electrocatalytic green hydrogen generation from water splitting further utilization via hydrogen-oxygen fuel cells, such that a vast majority synthetic strategies toward SAS-based (SASCs) are exploited. In particular, room-temperature electrosynthesis under atmospheric pressure offers novel, safe, effective route to access SASs. Herein, recent progress in ambient SASs sustainable future opportunities discussed. A systematic summary is started on three kinds electrochemically routes SASs, including electrochemical etching (ECE), direct electrodeposition (DED), leaching-redeposition (ELR), associated advanced characterization techniques. Next, their applications energy conversion evolution reaction, oxygen overall splitting, reduction reaction reviewed. Finally, brief conclusion remarks challenges regarding development high-performance cost-effective SASCs many other presented.

Language: Английский

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Regulating the Band Structure of Ni Active Sites in Few‐Layered Nife‐LDH by In Situ Adsorbed Borate for Ampere‐Level Oxygen Evolution

Advanced Functional Materials, Journal Year: 2023, Volume and Issue: 34(12)

Published: Dec. 6, 2023

Abstract Realizing rapid transformation of hydroxide to high‐active oxyhydroxide species in layered double (LDH) catalyst plays a significant role enhancing its activity toward oxygen evolution reaction (OER) for hydrogen production from water. Here, scalable strategy is developed synthesize defect‐rich few‐layered NiFe‐LDH nanosheets (f‐NiFe‐LDH‐B) with situ borate modified boosted and stable OER due that the can narrow bandgap Ni sites realize more conductive electronic structure. Besides, adsorbed tune d band center promote facilitate adsorption intermediates. The f‐NiFe‐LDH‐B catalyst, therefore, requires only 209 249 mV overpotential deliver 10 100 mA cm −2 OER, respectively, Tafel slope 43.5 dec −1 . Moreover, 1.8 V cell voltage required reach Ampere‐level overall water splitting 500 h at room temperature.

Language: Английский

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Recent advances in interface engineering of Fe/Co/Ni-based heterostructure electrocatalysts for water splitting

Materials Horizons, Journal Year: 2023, Volume and Issue: 10(7), P. 2312 - 2342

Published: Jan. 1, 2023

The application and prospect of Fe/Co/Ni-based catalysts modified by interface engineering, biomass electrooxidation reaction (BEOR) coupled with hydrogen evolution (HER) in water splitting are summarized.

Language: Английский

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