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Nano Research 2020, 13(10): 2683-2690 https://doi.org/10.1007/s12274-020-2910-x
Research Article | Issue | Published: 05 October 2020

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

Show Author's Information Yue Sun§,  Yunjie Zhou§,  Yan Liu,  Qingyao Wu,  Mengmeng Zhu,  Hui Huang,  Yang Liu( ),  Mingwang Shao( ),  Zhenhui Kang( )
Institute of Functional Nano and Soft Materials Laboratory (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Soochow University, Suzhou 215123, China

§ Yue Sun and Yunjie Zhou contributed equally to this work.

Keywords:
electrocatalysis, methanol oxidation reaction, photoelectrochemistry, photoactive process, cascade
Topics:
Catalysis Electrocatalysis ElectrocatalystsLightOxidationOxide mineralsPlatinum compoundsTitanium Dioxide
Cite this article:
Sun Y, Zhou Y, Liu Y, et al. A photoactive process cascaded electrocatalysis for enhanced methanol oxidation over Pt-MXene-TiO2 composite. Nano Research, 2020, 13(10): 2683-2690. https://doi.org/10.1007/s12274-020-2910-x
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Abstract Full text Electronic supplementary material About this article

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-1Pt 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.


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About this article

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

Show Author's information Yue Sun§, Yunjie Zhou§, Yan Liu, Qingyao Wu, Mengmeng Zhu, Hui Huang, Yang Liu( ), Mingwang Shao( ), Zhenhui Kang( )
Institute of Functional Nano and Soft Materials Laboratory (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Soochow University, Suzhou 215123, China

§ Yue Sun and Yunjie Zhou contributed equally to this work.

Abstract

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-1Pt 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.

Keywords: electrocatalysis, methanol oxidation reaction, photoelectrochemistry, photoactive process, cascade

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Publication history
Copyright
Acknowledgements

Publication history

Received: 11 April 2020
Revised: 16 May 2020
Accepted: 30 May 2020
Published: 05 October 2020
Issue date: October 2020

Copyright

© Tsinghua University Press and Springer-Verlag GmbH Germany, part of Springer Nature 2020

Acknowledgements

This work is supported by 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.‬‬‬‬‬‬‬

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