Yolk-Shell Structured Zinc-Cobalt-Ruthenium Alloy Oxide Assembled with Ultra-Small Nanoparticles: A Superior Cascade Catalyst toward Oxygen Evolution Reaction

Bishan Zhang; Yan Luo; Dong XiangJundi QinKanghua MiaoXiufang WangXiongwu KangYong Tian

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Yolk-Shell Structured Zinc-Cobalt-Ruthenium Alloy Oxide Assembled with Ultra-Small Nanoparticles: A Superior Cascade Catalyst toward Oxygen Evolution Reaction

机译：Yolk-Shell Structured Zinc-Cobalt-Ruthenium Alloy Oxide Assembled with Ultra-Small Nanoparticles: A Superior Cascade Catalyst toward Oxygen Evolution Reaction

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Structure engineering has proven to be an effective strategy for improvingthe catalytic performance and reducing the cost of ruthenium oxide-basedcatalysts toward oxygen evolution reactions (OER). Herein, a polyhedronshapedyolk-shell structure composed of zinc-cobalt-ruthenium ternary metalalloy oxide (ZnCo-RuO_2/C) is prepared, by taking advantage of the Kirkendalleffect. The yolk-shell frame and the ensembled metal oxide nanoparticles are116.9 ± 25.9 nm and 3.1 ± 0.7 nm in diameter, respectively. The porous yolkshellstructure of ZnCo-RuO_2/C exposes abundant active sites and facilitatesmass transfer for OER. Theoretical calculations indicate that ZnCo-RuO_2 maybreak the linear scaling relationship for the OER intermediates and dramaticallyreduces the energy barrier of the potential determining step, which may be oneof the factors that are responsible for the enhanced OER performance of ZnCo-RuO_2/C. In 1 m KOH aqueous electrolyte, ZnCo-RuO_2/C delivers an overpotentialof only 180 mV at 10 mA cm~(?2) and a Tafel slope of 63 mV dec~(?1), superior tothat of single metal-doped, pristine and commercial RuO_2. As an anode catalystof zinc-air batteries, ZnCo-RuO_2/C exhibits improved power density and durabilityrelative to commercial RuO_2, very promising for practical application.

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来源
《Advanced functional materials》 |2023年第34期|2214529.1-2214529.9|共9页
作者
Bishan Zhang; Yan Luo; Dong XiangJundi QinKanghua MiaoXiufang WangXiongwu KangYong Tian;
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作者单位

School of PharmacyGuangdong Pharmaceutical UniversityGuangzhou, Guangdong 510006, P. R. China;

New Energy Research InstituteSchool of Environment and EnergySouth China University of TechnologyHigher Education Mega CenterGuangzhou, Guangdong 510006, P. R. China;

School of PharmacyGuangdong Pharmaceutical UniversityGuangzhou, Guangdong 510006, P. R. China, Guangdong Provincial Key Laboratory of Advanced Drug DeliveryGuangdong Provincial Engineering Center of Topical PreciseDrug Delivery SystemGuangdong Pharmaceutical UniversityGuangzhou 510006, P. R. China;

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正文语种英语
中图分类无线电电子学、电信技术;工程材料学;
关键词
alloy oxides; Kirkendall effect; oxygen evolution reactions; ultra-small nanoparticles; yolk-shell;

Yolk-Shell Structured Zinc-Cobalt-Ruthenium Alloy Oxide Assembled with Ultra-Small Nanoparticles: A Superior Cascade Catalyst toward Oxygen Evolution Reaction

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