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Nano Research 2018, 11(4): 2058-2068 https://doi.org/10.1007/s12274-017-1822-x
Research Article | Issue | Published: 19 March 2018

Promoting the methanol oxidation catalytic activity by introducing surface nickel on platinum nanoparticles

Show Author's Information Siqi Lu,  Huiming Li,  Jingyao Sun,  Zhongbin Zhuang( )
State Key Lab of Organic-Inorganic CompositesBeijing Advanced Innovation Center for Soft Matter Science and EngineeringBeijing Key Lab of Energy Environmental CatalysisBeijing University of Chemical TechnologyBeijing100029China
Keywords:
methanol oxidation reaction (MOR), surface structure, OH adsorption, Pt alloy catalysts
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Lu S, Li H, Sun J, et al. Promoting the methanol oxidation catalytic activity by introducing surface nickel on platinum nanoparticles. Nano Research, 2018, 11(4): 2058-2068. https://doi.org/10.1007/s12274-017-1822-x
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Abstract Full text Electronic supplementary material About this article

High performance methanol oxidation reaction (MOR) catalysts are critical to the performance of attractive, direct methanol fuel cells. Here, we use surface controlled PtNi alloy nanoparticles as model catalysts to study the MOR mechanism and give further guidance to the design of new high performance MOR catalysts. The enhanced MOR activity of PtNi alloy was mainly attributed to the enhanced OH adsorption owing to surface Ni sites. This suggests that the MOR undergoes the Langmuir–Hinshelwood mechanism, whereby adsorbed CO is removed with the assistance of adsorbed OH. Within the PtNi catalyst, Pt provides methanol adsorption sites (in which methanol is converted to adsorbed CO) and Ni provides OH adsorption sites. The optimized Pt–Ni ratio for MOR was found to be 1:1. This suggests that bifunctional catalysts with both CO and OH adsorption sites can lead to highly active MOR catalysts.


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Electronic supplementary material
About this article

Promoting the methanol oxidation catalytic activity by introducing surface nickel on platinum nanoparticles

Show Author's information Siqi Lu, Huiming Li, Jingyao Sun, Zhongbin Zhuang( )
State Key Lab of Organic-Inorganic CompositesBeijing Advanced Innovation Center for Soft Matter Science and EngineeringBeijing Key Lab of Energy Environmental CatalysisBeijing University of Chemical TechnologyBeijing100029China

Abstract

High performance methanol oxidation reaction (MOR) catalysts are critical to the performance of attractive, direct methanol fuel cells. Here, we use surface controlled PtNi alloy nanoparticles as model catalysts to study the MOR mechanism and give further guidance to the design of new high performance MOR catalysts. The enhanced MOR activity of PtNi alloy was mainly attributed to the enhanced OH adsorption owing to surface Ni sites. This suggests that the MOR undergoes the Langmuir–Hinshelwood mechanism, whereby adsorbed CO is removed with the assistance of adsorbed OH. Within the PtNi catalyst, Pt provides methanol adsorption sites (in which methanol is converted to adsorbed CO) and Ni provides OH adsorption sites. The optimized Pt–Ni ratio for MOR was found to be 1:1. This suggests that bifunctional catalysts with both CO and OH adsorption sites can lead to highly active MOR catalysts.

Keywords: methanol oxidation reaction (MOR), surface structure, OH adsorption, Pt alloy catalysts

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Publication history
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Acknowledgements

Publication history

Received: 01 August 2017
Revised: 19 August 2017
Accepted: 22 August 2017
Published: 19 March 2018
Issue date: April 2018

Copyright

© Tsinghua University Press and Springer-Verlag GmbH Germany 2017

Acknowledgements

Acknowledgements

This work was financially supported by the National Key Research and Development Program of China (No. 2017YFA0206500), the National Natural Science Foundation of China (No. 21671014), State Key Laboratory of Organic-Inorganic Composites, Beijing University of Chemical Technology (No. oic-201503003) and the Fundamental Research Funds for the Central Universities (No. buctrc201522).

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