Journal of Energy Chemistry, Год журнала: 2023, Номер 86, С. 480 - 489
Опубликована: Авг. 19, 2023
Язык: Английский
ACS Catalysis, Год журнала: 2022, Номер 12(17), С. 10808 - 10817
Опубликована: Авг. 19, 2022
Electrochemical hydrolytic hydrogen production is the most promising method for renewable energy storage and conversion. However, kinetic slow oxygen evolution reaction (OER) limits development of water electrolysis at anode. The state-of-the-art OER catalysts face a dilemma high content noble metals low activities. Herein, strategy achieving efficient stable high-entropy alloy (HEA) by Mo-coordination reported. earth-abundant FeCoNiMo HEA catalyst provides an overpotential as 250 mV current density 10 mA cm–2 in alkaline medium, which 89 lower than that IrO2. turnover frequency 0.051 s–1 300 3 times higher commercial IrO2 even 11 FeCoNi without Mo-coordination. Importantly, exhibits stability 100 cm–2. Methanol molecular probe experiment X-ray photoelectron spectroscopy analyses suggest electrons Mo transfer to Fe, Co, Ni catalyst, leads weakened OH* bonding and, result, enhanced performance catalyst. Consistent with methanol analysis, real-time simulation reveals coordination within can speed up rate-determining deprotonation step OER. Our finding opens routine designing cost-effective electrocatalysts OER, could facilitate discoveries catalysts.
Язык: Английский
Процитировано
202
ChemSusChem, Год журнала: 2022, Номер 15(8)
Опубликована: Март 8, 2022
As highlighted by the recent roadmaps from European Union and United States, water electrolysis is most valuable high-intensity technology for producing green hydrogen. Currently, two commercial low-temperature electrolyzer technologies exist: alkaline (A-WE) proton-exchange membrane (PEM-WE). However, both have major drawbacks. A-WE shows low productivity efficiency, while PEM-WE uses a significant amount of critical raw materials. Lately, use anion-exchange electrolyzers (AEM-WE) has been proposed to overcome limitations current systems. AEM-WE could become cornerstone achieve an intense, safe, resilient hydrogen production fulfill targets 2050 decarbonization goals. Here, status development discussed, with focus on aspects research highlighting potential routes overcoming remaining issues. The Review closes future perspective indicating be achieved.
Язык: Английский
Процитировано
189
Nature Communications, Год журнала: 2023, Номер 14(1)
Опубликована: Апрель 7, 2023
Dynamic reconstruction of metal sulphides during electrocatalytic oxygen evolution reaction (OER) has hampered the acquisition legible evidence for comprehensively understanding phase-transition mechanism and activity origin. Herein, modelling on a series cobalt-nickel bimetallic sulphides, we first time establish an explicit comprehensive picture their dynamic phase evaluation pathway at pre-catalytic stage before OER process. By utilizing in-situ electrochemical transmission electron microscopy energy loss spectroscopy, lattice sulphur atoms (NiCo)S1.33 particles are revealed to be partially substituted by from electrolyte form oxygen-sulphur coexisting shell surface generation reconstituted active species. Such S-O exchange process is benefitted subtle modulation metal-sulphur coordination caused specific Ni Co occupation. This unique oxygen-substitution behaviour produces (NiCo)OxS1.33-x reduce barrier converting into oxy/hydroxide derivative, therefore significantly increasing proportion oxygen-mediated compared pure sulphide surface. We anticipate this direct observation can provide catalysts' structural compositional
Язык: Английский
Процитировано
165
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
Процитировано
157
Chem, Год журнала: 2023, Номер 9(7), С. 1882 - 1896
Опубликована: Апрель 6, 2023
Язык: Английский
Процитировано
157
Advanced Materials, Год журнала: 2023, Номер 35(39)
Опубликована: Янв. 14, 2023
Abstract The energy efficiency of metal–air batteries and water‐splitting techniques is severely constrained by multiple electronic transfers in the heterogenous oxygen evolution reaction (OER), high overpotential induced sluggish kinetics has become an uppermost scientific challenge. Numerous attempts are devoted to enabling activity, selectivity, stability via tailoring surface physicochemical properties nanocatalysts. Lattice‐strain engineering as a cutting‐edge method for tuning geometric configuration metal sites plays pivotal role regulating interaction catalytic surfaces with adsorbate molecules. By defining d‐band center descriptor structure–activity relationship, individual contribution strain effects within state‐of‐the‐art electrocatalysts can be systematically elucidated OER optimization mechanism. In this review, fundamentals advancements strain‐catalysts showcased innovative trigger strategies enumerated, particular emphasis on feedback mechanism between precise regulation lattice‐strain optimal activity. Subsequently, modulation various attributes categorized impediments encountered practicalization strained effect discussed, ending outlook future research directions burgeoning field.
Язык: Английский
Процитировано
148
Energy & Fuels, Год журнала: 2022, Номер 36(13), С. 6675 - 6694
Опубликована: Июнь 23, 2022
Electrochemical hydrogen production is considered the most reliable approach to transfer renewable energies chemical energy─namely, hydrogen─for storage, and intensive attention has been directed nonprecious catalyst development for water splitting reactions. Among candidates, metal sulfides have extensively explored as an emerging electrocatalyst material oxygen evolution reaction (OER) in reaction, because of their abundant active centers, good electrical conductivity, high intrinsic activity. By optimizing structure states, some advanced catalysts reported recently, which was instructive inspiring novel development. Herein, recent advances electrocatalytic performance optimization strategies transition-metal sulfide OER are reviewed systematically comprehensively. The fundamental catalytic mechanism key parameters first presented then followed by physicochemical properties sulfides, could be helpful understanding correlation between performance. Importantly, activity boosted general strategies, terms defect/vacancy effect, lattice mismatch, phase engineering, heterostructure, doping mainly discussed this work. challenges opportunities related further materials with long-term durability finally proposed. It can concluded that these regulatory largely improve increasing site exposure reducing energy barrier In addition, problems future improving presented, provides beneficial enlightenment guidance efficient low-cost electrocatalysts future. Hopefully, effort would design preparation OER.
Язык: Английский
Процитировано
108
Journal of Materials Chemistry A, Год журнала: 2023, Номер 11(11), С. 5476 - 5494
Опубликована: Янв. 1, 2023
The oxygen evolution reaction (OER), as an essential process in water decomposition and air batteries, has received increasing attention the context of clean energy production efficient storage.
Язык: Английский
Процитировано
100
ACS Catalysis, Год журнала: 2023, Номер 13(4), С. 2462 - 2471
Опубликована: Фев. 2, 2023
The synergistic regulation of the electronic structures transition-metal oxide-based catalysts via oxygen vacancy defects and single-atom doping is efficient to boost their evolution reaction (OER) performance, which remains challenging due complex synthetic procedures. Herein, a facile defect-induced in situ deposition strategy developed anchor atomically dispersed Ru onto vacancy-rich cobalt oxides (Ru/Co3O4–x) based on spontaneous redox between Ru3+ ions nonstoichiometric Co3O4–x. Accordingly, as-prepared Ru/Co3O4–x electrocatalyst with coexistence vacancies atoms exhibits excellent performances toward OER low overpotential 280 mV at 10 mA cm–2, small Tafel slope value 86.9 dec–1, good long-term stability alkaline media. Furthermore, density functional theory calculations uncover that could synergistically tailor electron decentralization d-band center Co atoms, further optimizing adsorption oxygen-based intermediates (*OH, *O, *OOH) reducing barriers OER. This work proposes an available for constructing electrocatalysts abundant noble metal presents deep understanding engineering transition-metal-based evolution.
Язык: Английский
Процитировано
96
International Journal of Hydrogen Energy, Год журнала: 2022, Номер 47(63), С. 26956 - 26977
Опубликована: Июль 1, 2022
Язык: Английский
Процитировано
92