Platinum–silver alloyed octahedral nanocrystals as electrocatalyst for methanol oxidation reaction.
- Resource Type
- Article
- Authors
- Li, Jiajing; Rong, Heng; Tong, Xiaowei; Wang, Peng; Chen, Tao; Wang, Zhenghua
- Source
- Journal of Colloid & Interface Science. Mar2018, Vol. 513, p251-257. 7p.
- Subject
- *PLATINUM-silver alloys
*NANOCRYSTALS
*OCTAHEDRA
*ELECTROCATALYSTS
*OXIDATION of methanol
- Language
- ISSN
- 0021-9797
Previous reports show that the {1 1 1} crystal facets of Pt-based nanocrystal catalysts are highly active for the electrooxidation of methanol. In this work, platinum–silver (Pt–Ag) alloy octahedral nanocrystals with exposed {1 1 1} facets are successfully synthesized through a one-pot, wet-chemical route. The growth mechanism of octahedral nanocrystals can be attributed to the stabilization of {1 1 1} facets by PVP. The electrocatalytic performances of the Pt–Ag octahedral nanocrystals with different Pt/Ag ratio and commercial Pt/C are studied. The results show that the electrocatalytic performances of the Pt–Ag octahedral nanocrystals are much better than that of the commercial Pt/C catalyst, and the Pt–Ag octahedral nanocrystals with a Pt/Ag ratio of 2:1 show the best electrocatalytic performances among the Pt–Ag octahedral nanocrystals. The Pt–Ag octahedral nanocrystals might be a promising candidate as anode catalyst for DMFCs. [ABSTRACT FROM AUTHOR]