Preparation of platinum-silver alloy nanoparticles and their catalytic performance in methanol electro-oxidation

ZHAO Hai-dong; LU Zhen; LIU Rui; LI Zuo-peng; GUO Yong

Volume 48 Issue 8

Aug. 2020

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Article Navigation > Journal of Fuel Chemistry and Technology > 2020 > 48(8): 1015-1024

ZHAO Hai-dong, LU Zhen, LIU Rui, LI Zuo-peng, GUO Yong. Preparation of platinum-silver alloy nanoparticles and their catalytic performance in methanol electro-oxidation[J]. Journal of Fuel Chemistry and Technology, 2020, 48(8): 1015-1024.

Citation:

ZHAO Hai-dong, LU Zhen, LIU Rui, LI Zuo-peng, GUO Yong. Preparation of platinum-silver alloy nanoparticles and their catalytic performance in methanol electro-oxidation[J]. Journal of Fuel Chemistry and Technology, 2020, 48(8): 1015-1024.

Citation:

ZHAO Hai-dong, LU Zhen, LIU Rui, LI Zuo-peng, GUO Yong. Preparation of platinum-silver alloy nanoparticles and their catalytic performance in methanol electro-oxidation[J]. Journal of Fuel Chemistry and Technology, 2020, 48(8): 1015-1024.

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Preparation of platinum-silver alloy nanoparticles and their catalytic performance in methanol electro-oxidation

School of Chemistry and Chemical Engineering, Shanxi Datong University, Datong 037009, China

Funds:

the Natural Science Foundation of Shanxi Province of China 201801D121073

the Scientific and Technological Innovation Programs of Higher Education Institutions in Shanxi Province 2019L0749

Datong Key Research Project of Science and Technology Planning Social Development 2017119

the Applied Basic Research Youth Science and Technology Foundation of Shanxi Province of China 201901D211433

the Scientific and Technological Innovation Programs of Higher Education Institutions in Shanxi Province 2019L0737

2019 Open Research Fund of Shanxi Province Research Center for Innovative Application of New Mesoporous Materials MMIA2019106

PhD Research Startup Foundation of Shanxi Datong University 2013-B-16

the Natural Science Foundation of Shanxi 201701D121016

Natural Science Foundation of Datong 201819

More Information

Corresponding author: LU Zhen, E-mail: luzhen0313@aliyun.com; LI Zuo-peng, E-mail: lizuopeng@126.com
Received Date: 2020-07-14
Rev Recd Date: 2020-07-24

Available Online: 2021-01-23

Publish Date: 2020-08-10

Abstract

Abstract

Platinum-silver alloy nanoparticles (Pt_xAg_y NPs) were synthesized in a molten salt system without using any organic surfactants or solvents; the catalytic role of Ag in the methanol electrooxidation reaction (MOR) in alkaline electrolyte over Pt_xAg_y NPs was investigated. The TEM images suggest that Pt₅₂Ag₄₈ nanotubes (NTs) can be obtained when the Pt/Ag ratio in the molten salt precursor reaches 1. The methanol electrooxidation reaction test results indicate that the Pt₅₂Ag₄₈ NTs with a clean surface exhibits a much better catalytic performance than the conventional Pt black in MOR. Meanwhile, the catalytic activity of the Pt₅₂Ag₄₈ NTs is greatly related to the positive potential limit; the peak current of MOR reaches 1.61 mA/μg_Pt with a positive potential limit from -1.0 to 0.5 V (vs. SCE), which is 1.92 times higher than that with a positive potential limit from -1.0 to 0.1 V (vs. SCE). The Ag element in the surface layer of Pt_xAg_y alloy may promote the MOR through a redox process during the electrochemical cycle. The insight shown in work should be beneficial to the application of Pt_xAg_y alloy in the direct methanol fuel cells (DMFCs).
- fuel cell,
- Pt-based alloy,
- platinum-silver nanoparticles,
- direct methanol fuel cells,
- methanol electrooxidation reaction

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References(57)

References

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