Functional group scission-induced lattice strain in chiral macromolecular metal-organic framework arrays for electrocatalytic overall water splitting

Applied Catalysis B Environment and Energy, Journal Year: 2022, Volume and Issue: 307, P. 121151 - 121151

Published: Jan. 31, 2022

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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Tailored p‐Orbital Delocalization by Diatomic Pt‐Ce Induced Interlayer Spacing Engineering for Highly‐Efficient Ammonia Electrosynthesis

Advanced Energy Materials, Journal Year: 2022, Volume and Issue: 13(6)

Published: Dec. 13, 2022

Abstract Electrochemical nitrate reduction to ammonia (eNO 3 RR) is a green and appealing method for synthesis, but hindered by the multistep chemical reaction competitive hydrogen generation. Herein, synthesis of 2D SnS nanosheets with tailored interlayer spacing reported, including both expansion compression, through active diatomic Pt‐Ce pairs. Taking together experimental results, in situ Raman spectra, DFT calculations, it found that compressed can tune electron density localized p‐orbital Sn into its delocalized states, thus enhancing affinity towards NO − 2 inhibiting generation simultaneously. This phenomenon significantly facilitates rate‐determining step (*NO →*NO ) eNO RR, realizes an excellent Faradaic efficiency (94.12%) yield rate (0.3056 mmol cm −2 h −1 NH at −0.5 V versus RHE. work provides powerful strategy tailoring flexible materials opens new avenue constructing high‐performance catalysts synthesis.

Language: Английский

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Heterobimetallic NiFe Cooperative Molecular Water Oxidation Catalyst

Angewandte Chemie International Edition, Journal Year: 2023, Volume and Issue: 62(18)

Published: March 4, 2023

Abstract We reported herein the development of heterobimetallic NiFe molecular platform to understand synergistic effect in water oxidation catalysis. Compared homonuclear bimetallic compounds (NiNi and FeFe), complex possesses more remarkable catalytic performance. Mechanistic studies suggest that this difference is attributed fact synergy can effectively promote O−O bond formation. The generated Ni III ( μ ‐O)Fe IV =O key intermediate was formed via intramolecular oxyl‐oxo coupling between bridged O radical terminal Fe moiety.

Language: Английский

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Regulation of crystallinity and defects on CoNiRuOx nanocages for enhanced oxygen evolution reaction

Chemical Engineering Journal, Journal Year: 2023, Volume and Issue: 466, P. 143059 - 143059

Published: April 24, 2023

Language: Английский

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