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On the Origin of the Enhanced Performance of Pt/Dendrite‐like Mn 3 O 4 for Methanol Electrooxidation
Author(s) -
Chi Hong Zhong,
Wu Yongqiang,
Xiong Qinqin,
Zhang Chunxiao,
Qin Haiying
Publication year - 2018
Publication title -
chemcatchem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.497
H-Index - 106
eISSN - 1867-3899
pISSN - 1867-3880
DOI - 10.1002/cctc.201800332
Subject(s) - catalysis , methanol , calcination , nanoparticle , platinum , chemical engineering , materials science , dendrite (mathematics) , metal , dispersion (optics) , platinum nanoparticles , homogeneous , chemistry , inorganic chemistry , nanotechnology , organic chemistry , metallurgy , geometry , mathematics , physics , optics , engineering , thermodynamics
The interaction between precious metal nanoparticles and the support plays an important role in improving poisoning tolerance of Pt‐based catalysts and thus maintaining their activity and stability. Here, a dendrite‐like Mn 3 O 4 was fabricated and used as a support for Pt nanoparticles towards the methanol electrooxidation reaction. The nanoparticles were deposited chemically on surfaces of the dendritic Mn 3 O 4 , which was prepared through calcination of MnO 2 hollow microspheres. The Mn 3 O 4 support not only provided an appropriate base for the formation of nanosized and homogeneous platinum particles (about 2.6 nm in size), but also increased Pt 0 binding energy owing to a strong electronic interaction. By combining the advantages of the small‐size, fine dispersion and enhanced binding energy of Pt nanoparticles, the Pt/Mn 3 O 4 composite exhibited enhanced catalytic activity, poisoning tolerance and stability for methanol electrooxidation.
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