MOF-derived CoS2/WS2 electrocatalysts with sulfurized interface for high-efficiency hydrogen evolution reaction: Synthesis, characterization and DFT calculations

Chemical Engineering Journal, Journal Year: 2023, Volume and Issue: 479, P. 147924 - 147924

Published: Dec. 7, 2023

Language: Английский

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Engineering defective trimetallic metal–organic framework nanosheets for advanced water oxidation electrocatalysis

Dalton Transactions, Journal Year: 2023, Volume and Issue: 52(24), P. 8466 - 8472

Published: Jan. 1, 2023

Limited by single metal active sites and low electrical conductivity, designing nickel-based metal-organic framework (MOF) materials with high activity durability remains a challenge. Here, novel class of two-dimensional trimetallic MOF nanosheets plentiful sites, rich defects, facilitated mass electron transfer channels is developed as efficient electrocatalysts for boosting oxygen evolution reaction (OER). The unique 2D nanosheet structure enlarges the area; meanwhile, organic ligand in can work pillar to enlarge interplanar space boost ion transportation, synergistic effect between multi-metal effectively promote electrocatalytic activity. Interestingly, after an electrochemical activation process, optimized NiFeZn yield abundant enabling them deliver overpotential 233 mV at 10 mA cm-2 much smaller Tafel slope 37.8 dec-1. More importantly, this method also universal synthesis NiFe-MOF family achieving outstanding OER performance. These findings present strategy construction OER.

Language: Английский

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Enhanced Electrocatalytic Water Oxidation by Interfacial Phase Transition and Photothermal Effect in Multiply Heterostructured Co₉S₈/Co₃S₄/Cu₂S Nanohybrids

Angewandte Chemie International Edition, Journal Year: 2023, Volume and Issue: 62(41)

Published: Aug. 28, 2023

The rational design of advanced nanohybrids (NHs) with optimized interface electronic environment and rapid reaction kinetics is pivotal to electrocatalytic schedule. Herein, we developed a multiple heterogeneous Co9 S8 /Co3 S4 /Cu2 S nanoparticle in which Co3 germinates between Cu2 S. Using high-angle annular-dark-field imaging theoretical calculation, it was found that the integration tends trigger phase transition , leading interlayer due low formation energy (-7.61 eV) than (-5.86 eV). Such not only lowers barrier oxygen evolution (OER, from 0.335 eV 0.297 eV), but also increases charge carrier density (from 7.76×1014 2.09×1015 cm-3 ), creates more active sites. Compared S, NHs demonstrate notable photothermal effect can heat catalyst locally, offset endothermic enthalpy change OER, promote migrate, intermediates adsorption/deprotonation improve kinetics. Profiting these favorable factors, requires an OER overpotential 181 mV overall water splitting cell voltage 1.43 V driven 10 mA cm-2 under irradiation near-infrared light, outperforming those without light many reported Co-based catalysts.

Language: Английский

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Cation–Anion Dual Doping Modifying Electronic Structure of Hollow CoP Nanoboxes for Enhanced Water Oxidation Electrocatalysis

Inorganic Chemistry, Journal Year: 2022, Volume and Issue: 61(42), P. 16944 - 16951

Published: Oct. 12, 2022

Tuning the electronic state of a nanocatalyst is vital importance for elevating its catalytic performance toward oxygen evolution reaction (OER). Herein, cation-anion dual doping strategy has been proposed modifying structure CoP via Fe and S atoms. Impressively, demonstrated to be favorable improving carrier density produce more hydroxyl radicals (•OH), while can further modify improve charge-transfer characteristics, thereby synergistically decreasing energy barrier transformation O* OOH* promoting electrocatalytic OER performance. More importantly, highly open nanobox also beneficial exposure accessible catalytically active sites, which substantially facilitate electron mass transport, leading superb The successful modulation dual-doping will pose new designing advanced nanocatalysts energy-related catalysis process.

Language: Английский

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Intensifying Hydrogen Spillover for Boosting Electrocatalytic Hydrogen Evolution Reaction

The Chemical Record, Journal Year: 2022, Volume and Issue: 23(3)

Published: Dec. 8, 2022

Abstract Hydrogen spillover has attracted increasing interests in the field of electrocatalytic hydrogen evolution reaction (HER) recent years because their distinct mechanism and beneficial terms for simultaneously weakening strong adsorption on metal strengthening weak support. By taking advantageous merits efficient transfer, spillover‐based binary catalysts have been widely investigated, which paves a new way boosting development production by water electrolysis. In this paper, we summarize progress interesting focusing advanced strategies intensifying towards HER. addition, challenging issues some perspective insights future electrocatalysts are also systematically discussed.

Language: Английский

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Heterojunction MnO₂-nanosheet-decorated Ag nanowires with enhanced oxidase-like activity for the sensitive dual-mode detection of glutathione

Nanoscale, Journal Year: 2022, Volume and Issue: 14(41), P. 15340 - 15347

Published: Jan. 1, 2022

The biocatalytic design of nanomaterials with enzyme-like activity is considered a reliable and promising toolkit for the generation diagnostic agents in complex biological microenvironments.

Language: Английский

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Surface/interface engineering for fabricating hierarchical Ir doped NiMoO4 covered by CoMn layered double hydroxide toward oxygen evolution reaction

Journal of Alloys and Compounds, Journal Year: 2022, Volume and Issue: 924, P. 166415 - 166415

Published: July 21, 2022

Language: Английский

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Mo doping and Se vacancy engineering for boosting electrocatalytic water oxidation by regulating the electronic structure of self-supported Co₉Se₈@NiSe

Nanoscale, Journal Year: 2022, Volume and Issue: 15(1), P. 259 - 265

Published: Nov. 28, 2022

Mo doping and Se vacancy engineering synergistically boost electrocatalytic water oxidation.

Language: Английский

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Defect and Interface Engineering of Three-Dimensional Open Nanonetcage Electrocatalysts for Advanced Electrocatalytic Oxygen Evolution Reaction

ACS Applied Materials & Interfaces, Journal Year: 2022, Volume and Issue: 14(34), P. 38669 - 38676

Published: Aug. 22, 2022

Defect engineering and interface are two efficient approaches to promote the electrocatalytic performance of transition metal oxides (TMOs) by modulating local electronic structure inducing a synergistic effect but usually require costly complicated processes. Herein, facile electrochemical etching method is proposed for controllable tailoring defects in three-dimensional (3D) open nanonetcage CoZnRuOx heterostructure via situ remove partial ZnO. The highly 3D nanostructures, numerous defects, multicomponent heterointerfaces endow nanonetcages with more accessible active sites, moderated structure, strong effect, thereby enabling them not only deliver an ultralow overpotential (244 mV @ 10 mA cm-2) oxygen evolution reaction (OER) also high-performance overall water electrolysis coupling commercial Pt/C, potential 1.52 V at cm-2. Moreover, experiments characterizations reveal that remaining Zn2+ can facilitate OH- adsorption charge transfer, which further improves OER performance. This work proposes promising strategy creating surface heterostructured TMOs provides insights understand defect- interface-induced enhancement electrocatalysis.

Language: Английский

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Strategies for Promoting Catalytic Performance of Ru‐Based Electrocatalysts towards Oxygen/Hydrogen Evolution Reaction

The Chemical Record, Journal Year: 2023, Volume and Issue: 23(4)

Published: Feb. 20, 2023

Abstract Ru‐based materials hold great promise for substituting Pt as potential electrocatalysts toward water electrolysis. Significant progress is made in the fabrication of advanced electrocatalysts, but an in‐depth understanding engineering methods and induced effects still their early stage. Herein, we organize a review that focusing on strategies substantial improvement electrocatalytic OER HER performance catalysts, including geometric structure, interface, phase, electronic size, multicomponent engineering. Subsequently, enhancement catalytic by these are also elucidated. Furthermore, some representative applications well presented. Finally, challenges prospects elaborated future synthesis more effective catalysts boost application.

Language: Английский

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