Electronegativity-assisted optimized electronic structure of functionalized-Pt catalysts for boosting oxygen reduction kinetics

Jin Long ¹Kai-Wen Zhuang ²Wei Liao ¹Yan An ¹Bin Wang ¹Chen-Zhong Wu ¹Jian-Xin Cao ¹Qing Wang ³Jun-Song Chen ⁴Qing-Mei Wang¹

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作者信息

1. Guizhou University Key Laboratory of Green Chemical and Clean Energy Technology,School of Chemistry and Chemical Engineering,Guizhou University,Guiyang 550025,China;Guizhou University Engineering Research Center of Efficient Utilization for Industrial Waste,Guizhou University,Guiyang 550025,China;Institute of Dual-Carbon and New Energy Technology Innovation and Development of Guizhou Province,Guiyang 550025,China
2. Department of Dermatology,West China Hospital,Sichuan University,Chengdu 610041,China
3. Institute for Catalysis,Hokkaido University,Sapporo 001-0021,Japan
4. School of Materials and Energy,University of Electronic Science and Technology of China.Chengdu 611731,China;Interdisciplinary Materials Research Center,Institute for Advanced Study,Chengdu University,Chengdu 610106,China
折叠

Abstract

Opportunity to harmonize aspects of oxygen reduction reaction(ORR)performance and structure,and morphology,as well as composition,is urgent for the commercialization of proton exchange membrane fuel cells.Herein,we demonstrate the design and synthesis of a functionalized-supported-Pt catalyst(Pt@HNC)featuring a hollow nitrogen-modified dodecahedral carbon substrate obtained by a stress-induced-shrink tailoring route.The as-obtained Pt@HNC catalyst possesses enhanced ORR per-formance,in particular with half-wave potential,mass activity(MA)and specific activity,which greatly exceed the commercial Pt/C.The density functional theory(DFT)calculations further confirmed that the charge redistribution induced by the electronegativity differences improved the electron interaction between Pt and HNC support.The optimized electronic structure of Pt weakens the reaction energy barrier on the Pt@HNC surface and adsorption of*OH species,thus cooperatively improving the intrinsic activity toward ORR.Additionally,our work indeed pro-vides a guide for the future design of functional nanoma-terials in the field of catalysts and clean energy.

Key words

Proton exchange membrane fuel cell(PEMFC)/Oxygen reduction catalysis/Supported Pt-based catalyst/Stability

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基金项目

Natural Science Foundation of China(22169005)

Natural Science Foundation of China(22068009)

Natural Science Foundation of China(22262006)

Natural Science Special Foundation of Guizhou University(202017 Special Post A)

Natural Science Special Foundation of Guizhou University(702775203301)

Science and Technology Support Project of Guizhou Provincial science and Technology Department(ZK[2023]050)

Science and Technology Support Project of Guizhou Provincial science and Technology Department(ZK[2023]403)

Open Project of Institute of Dualcarbon and New Energy Technology Innovation and Development of Guizhou Province(DCRE-2023-06)

出版年

2024

稀有金属(英文版)

中国有色金属学会

稀有金属(英文版)

CSTPCDCSCDEI

影响因子：0.801

ISSN：1001-0521

参考文献量76

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