A photoactive process cascaded electrocatalysis for enhanced methanol oxidation over Pt-MXene-TiO2 composite  

作　　者：Yue Sun Yunjie Zhou Yan Liu Qingyao Wu Mengmeng Zhu Hui Huang Yang Liu Mingwang Shao Zhenhui Kang 

机构地区：[1]Institute of Functional Nano and Soft Materials Laboratory(FUNSOM),Jiangsu Key Laboratory for Carbon Based Functional Materials&Devices,Soochow University,Suzhou 215123,China

出　　处：《Nano Research》2020年第10期2683-2690,共8页纳米研究（英文版）

基　　金：National MCF Energy R&D Program(No.2018YFE0306105);Innovative Research Group Project of the National Natural Science Foundation of China(No.51821002);the National Natural Science Foundation of China(Nos.51725204,21771132,51972216,and 52041202);Natural Science Foundation of Jiangsu Province(Nos.BK20190041 and BK20190828);Key-Area Research and Development Program of GuangDong Province(No.2019B010933001);Collaborative Innovation Center of Suzhou Nano Science&Technology,the Priority Academic Program Development of Jiangsu Higher Education Institutions(PAPD),and the 111 Project.

摘　　要：Highly efficient photo-assisted electrocatalysis for methanol oxidation reaction(MOR)realizes the conversion of solar and chemical energy into electric energy simultaneously.Here we report a Pt-MXene-TiO2 composite for highly efficient MOR via a photoactive cascaded electro-catalytic process.With light(UV and visible light)irradiation,MXene-TiO2 serves as the photo active centre(photoinduced hole)to activate the methanol molecules,while Pt particles are the active centre for the following electro-catalytic oxidation of those activated methanol molecules.Pt-MXene-TiO2 catalyst exhibits a lower onset potential(0.33 V)and an impressive mass activity of 2,750.42 mA·mg^−1 Pt under light illumination.It represents the highest MOR activity ever reported for photo-assisted electrocatalysts.Pt-MXene-TiO2 also shows excellent CO tolerance ability and stability,in which,after long-term(5,000 s)reaction,still keeps a high mass activity of 1,269.81 mA·mg−1Pt(62.66%of its initial activity).The photo-electro-catalytic system proposed in this work offers novel opportunities for exploiting photo-assisted enhancement of highly efficient and stable catalysts for MOR.

关 键 词：photoactive process ELECTROCATALYSIS CASCADE PHOTOELECTROCHEMISTRY methanol oxidation reaction 

分 类 号：O64[理学—物理化学]