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. shu

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

Corresponding author: LU Zhen, luzhen0313@aliyun.com LI Zuo-peng, lizuopeng@126.com
Received Date: 14 July 2020
Revised Date: 24 July 2020

Fund Project: the Natural Science Foundation of Shanxi 201701D121016the Applied Basic Research Youth Science and Technology Foundation of Shanxi Province of China 201901D211433PhD Research Startup Foundation of Shanxi Datong University 2013-B-16the Scientific and Technological Innovation Programs of Higher Education Institutions in Shanxi Province 2019L0737The project was supported by 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) and Natural Science Foundation of Datong (201819)Datong Key Research Project of Science and Technology Planning Social Development 2017119the Scientific and Technological Innovation Programs of Higher Education Institutions in Shanxi Province 2019L0749Natural Science Foundation of Datong 2018192019 Open Research Fund of Shanxi Province Research Center for Innovative Application of New Mesoporous Materials MMIA2019106the Natural Science Foundation of Shanxi Province of China 201801D121073

Figures(10)

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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