An all-metallic nanovesicle for hydrogen oxidation

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外文摘要：Vesicle,a microscopic unit that encloses a volume with an ultrathin wall,is ubiquitous in biomaterials.However,it remains a huge challenge to create its inorganic metal-based artificial counterparts.Here,inspired by the formation of biological vesicles,we proposed a novel biomimetic strategy of curling the ultrathin nanosheets into nanovesicles,which was driven by the interfacial strain.Trapped by the interfacial strain between the initially formed substrate Rh layer and subsequently formed RhRu overlayer,the nanosheet begins to deform in order to release a certain amount of strain.Density functional theory(DFT)calculations reveal that the Ru atoms make the curling of nanosheets more favorable in thermodynamics applications.Owing to the unique vesicular structure,the RhRu nanovesicles/C displays excellent hydrogen oxidation reaction(HOR)activity and stability,which has been proven by both experiments and DFT calculations.Specifically,the HOR mass activity of RhRu nanovesicles/C are 7.52 A mg(Rh+Ru)-1 at an overpotential of 50 mV at the rotating disk electrode(RDE)level;this is 24.19 times that of commercial Pt/C(0.31 mAmgpt-1).Moreover,the hydroxide exchange membrane fuel cell(HEMFC)with RhRu nanovesicles/C displays a peak power density of 1.62 W cm-2 in the H2-O2 condition,much better than that of commercial Pt/C(1.18 W cm-2).This work creates a new biomimetic strategy to synthesize inorganic nanomaterials,paving a pathway for designing catalytic reactors.

外文关键词：

biomimetic synthesisnanovesicleinterfacial strainhydrogen oxidation reaction

作者：

Juntao Zhang、Lujie Jin、Hao Sun、Xiaozhi Liu、Yujin Ji、Youyong Li、Wei Liu、Dong Su、Xuerui Liu、Zhongbin Zhuang、Zhiwei Hu、Qi Shao、Xiaoqing Huang

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作者单位：

State Key Laboratory of Physical Chemistry of Solid Surfaces,College of Chemistry and Chemical Engineering,Xiamen University,Xiamen 361005,China

Innovation Laboratory for Sciences and Technologies of Energy Materials of Fujian Province(IKKEM),Xiamen 361005,China

Key Laboratory for Special Functional Materials of Ministry of Education,National &Local Joint Engineering Research Center for High-efficiency Display and Lighting Technology,School of Materials Science and Engineering,Collaborative Innovation Cente

Institute of Functional Nano and Soft Materials(FUNSOM),Jiangsu Key Laboratory for Carbon-Based Functional Materials& Devices,Soochow University,Suzhou 215123,China

State Key Laboratory of Rare Earth Resource Utilization,Changchun Institute of Applied Chemistry,Chinese Academy of Sciences,Changchun 130022,China

Beijing National Laboratory for Condensed Matter Physics,Institute of Physics,Chinese Academy of Sciences,Beijing 100190,China

State Key Lab of Organic-Inorganic Composites,Beijing University of Chemical Technology,Beijing 100029,China

Max Planck Institute for Chemical Physics of Solids,Dresden 01187,Germany

College of Chemistry and Chemical Engineering and Materials Science,Soochow University,Suzhou 215123,China

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基金：

National Key R&D Program of ChinaNational Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaNational Natural Science Foundation of Chinastartup support from Xiamen UniversityMax Planck-POSTECH-Hsinchu Center for Complex Phase Materials

项目编号：

2022YFA150450022025108U21A2032722121001

出版年：

2024

DOI：

10.1093/nsr/nwae153

国家科学评论(英文版)

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ISSN：

年,卷(期)：2024.11(6)