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Platinum nanoparticles with TiO2-skin as a durable catalyst for photoelectrochemical methanol oxidation and electrochemical oxygen reduction reactions

文献类型：期刊论文

作者Kang, Shuai1,4; Xia, Fan2; Hu, Zhuofeng3; Hu, Wei5; She, Yin5; Wang, Liang1,4; Fu, Xie1,4; Lu, Wenqiang1,4
刊名ELECTROCHIMICA ACTA
出版日期2020-05-20
卷号343页码:9
ISSN号0013-4686
关键词Core-shell nanoparticles Pt nanoparticles Electrocatalysis Methanol oxidation Oxygen reduction
DOI10.1016/j.electacta.2020.136119
通讯作者Hu, Zhuofeng(huzhf8@mail.sysu.edu.cn) ; Lu, Wenqiang(wqlu@cigit.ac.cn)
英文摘要Performance degradation of Pt nanoparticles is considered to be among the most severe problems for electrochemical reactions. Pt-TiO2 catalysts are widely studied due to the optical effect of TiO2, which is beneficial for electron transfer during methanol oxidation. However, different configurations of these catalysts are insufficient in research. Here, we report rationally designed Pt nanoparticles with TiO2-skin as electrocatalysts for methanol oxidations and oxygen reduction reactions. Methanol oxidation current densities of the Pt-TiO2 nanoparticles are largely improved under irradiation. When the catalysts are tortured successive at ultrahigh current up to 1.0 mA cm(-2), the potential-increase is as small as 90 mV. It shows good stability with a peak current fades of 4% after 250 cycles under illumination, compared with 13% in the dark. It also exhibits a much better oxygen reduction durability compared with Pt/C. By mechanism analysis, we believe the excellence in photoelectrochemistry is attributed to the TiO2-skin. The electrons generated in TiO2 spontaneously migrate to Pt nanoparticles, which provide a partially reducing atmosphere to prevent Pt nanoparticles from ionization and dissolution. (c) 2020 Elsevier Ltd. All rights reserved.
资助项目CIGIT Young Innovators Awards[Y82A240H10] ; Chongqing Innovators Program for Returned Overseas Scholars[cx2018152] ; Program for Basic Science and Frontier Technology of Chongqing[cstc2019jcyj-msxmX0684] ; Program for Basic Science and Frontier Technology of Beibei District[2019-3] ; Youth Innovation Promotion Association of the Chinese Academy of Sciences[2019374] ; National Natural Science Foundation of China[51902357] ; Natural Science Foundation of Guangdong Province, China[2019A1515012143] ; Start-up Funds for High-Level Talents of Sun Yat-sen University[38000-18841209] ; Fundamental Research Funds for the Central Universities[38000-31610622]
WOS研究方向Electrochemistry
语种英语
出版者PERGAMON-ELSEVIER SCIENCE LTD
WOS记录号WOS:000526114100013
源URL[http://119.78.100.138/handle/2HOD01W0/10804]  
专题中国科学院重庆绿色智能技术研究院
通讯作者Hu, Zhuofeng; Lu, Wenqiang
作者单位1.Chinese Acad Sci, Micronano Mfg & Syst Integrat Ctr, Chongqing Inst Green & Intelligent Technol, Chongqing 400714, Peoples R China
2.Univ Wisconsin, Dept Mat Sci & Engn, Milwaukee, WI 53211 USA
3.Sun Yat Sen Univ, Sch Environm Sci & Engn, Guangdong Prov Key Lab Environm Pollut Control &, Guangzhou 510275, Guangdong, Peoples R China
4.Univ Chinese Acad Sci, Chongqing Sch, Chongqing 400714, Peoples R China
5.Chongqing Univ, Coll Optoelect Engn, Key Lab Optoelect Technol & Syst, Minist Educ, Chongqing 400044, Peoples R China
推荐引用方式
GB/T 7714		 Kang, Shuai,Xia, Fan,Hu, Zhuofeng,et al. Platinum nanoparticles with TiO2-skin as a durable catalyst for photoelectrochemical methanol oxidation and electrochemical oxygen reduction reactions[J]. ELECTROCHIMICA ACTA,2020,343:9.
APA Kang, Shuai.,Xia, Fan.,Hu, Zhuofeng.,Hu, Wei.,She, Yin.,...&Lu, Wenqiang.(2020).Platinum nanoparticles with TiO2-skin as a durable catalyst for photoelectrochemical methanol oxidation and electrochemical oxygen reduction reactions.ELECTROCHIMICA ACTA,343,9.
MLA Kang, Shuai,et al."Platinum nanoparticles with TiO2-skin as a durable catalyst for photoelectrochemical methanol oxidation and electrochemical oxygen reduction reactions".ELECTROCHIMICA ACTA 343(2020):9.

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来源：重庆绿色智能技术研究院

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