期刊
JOURNAL OF POWER SOURCES
卷 210, 期 -, 页码 392-396出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jpowsour.2012.01.078
关键词
Pd; Polyoxometalates; Pd oxide; Metal-support interaction; Formic acid electrooxidation
资金
- National Natural Science Foundation of China [20876153, 20703043, 21073180, 21011130027, 20933004]
- National High Technology Research and Development Program of China (863 Program) [2007AA05Z159, 2007AA05Z143]
- National Basic Research Program of China (973 Program) [2011CB935702]
- CAS [KGCXZ-Y10-344]
- Science & Technology Research Programs of Jilin Province [20102204, 20100420]
The preparation of highly dispersed precious metal catalysts is an important subject for fuel cell applications. Here, using a phosphomolybdic acid (PMo12)-assisted method, a Pd-PMo12/C catalyst with uniform Pd nanoparticles is prepared. The TEM results show that the presence of PMo12 facilitates the formation of uniform Pd particles with an average particle size of 3.2 nm. More importantly, the Pd-PMo12/C catalyst displays an enhanced activity and stability for formic acid electro-oxidation and a better tolerance toward CO poisoning than Pd nanocatalysts prepared with sodium citrate as a stabilizer. A combination of the composition and structure analyses show that the reasons for the improved electro-catalytic activity of the Pd-PMo12/C catalyst involve the metal-support interaction, the richer Pd oxide/hydrous oxide content and the inherent properties of PMo12. (C) 2012 Elsevier B.V. All rights reserved.
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