Affiliation:
1. Guangxi Key Laboratory of Low Carbon Energy Materials School of Chemistry and Pharmaceutical Sciences Guangxi Normal University Guilin 541004 P. R. China
2. School of Resources and Environmental Engineering Jiangxi University of Science and Technology Ganzhou 341000 P. R. China
3. Saudi Arabia Basic Industries Corporation (SABIC) at King Abdullah University of Science and Technology (KAUST) Thuwal 23955-6900 Saudi Arabia
Abstract
AbstractRational design of high‐efficiency and viable electrocatalysts is essential in overcoming the bottleneck of sluggish alkaline hydrogen oxidation/evolution reaction (HOR/HER) kinetics. In this study, a metal‐organic framework‐derived strategy for constructing a Pt‐free catalyst with Ru clusters anchored on porous Cu−Cu2O@C is proposed. The designed Ru/Cu−Cu2O@C exhibits superior HOR performance, with a mass activity of 2.7 mA
at 50 mV, which is about 24 times higher than that of state‐of‐the‐art Pt/C (0.11 mA
). Significantly, Ru/Cu−Cu2O@C also displays impressive HER performance by generating 26 mV at 10 mA cm−2, which exceeds the majority of documented Ru‐based electrocatalysts. Systematic characterization and density functional theory (DFT) calculations reveal that efficient electron transfer between Ru and Cu species results in an attenuated hydrogen binding energy (HBE) of Ru and an enhanced hydroxy binding energy (OHBE) of Cu2O, together with an optimized H2O adsorption energy with Cu2O as the H2O*‐capturing site, which jointly facilitates HOR and HER kinetics.
Funder
National Natural Science Foundation of China
Natural Science Foundation of Guangxi Province
Subject
General Energy,General Materials Science,General Chemical Engineering,Environmental Chemistry
Cited by
4 articles.
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