Journal
CRYSTENGCOMM
Volume 16, Issue 12, Pages 2411-2416Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c3ce42362j
Keywords
-
Categories
Funding
- NSFC [5137222]
- Innovation Team Project of Zhejiang Province [2009R50005]
- start-up fund
- Central Universities of Xi'an Jiaotong University
Ask authors/readers for more resources
Pd-Pt alloy concave nanocubes enclosed by high-index facets were synthesized in ethylene glycol (EG) containing H2PtCl6 and Na2PdCl4 with ascorbic acid (AA) and KBr as reducing and capping agents, respectively. We found that the combination of bromide-induced galvanic replacement and co-reduction was responsible for the formation of these alloy concave nanocubes. The composition of the Pd-Pt alloy concave nanocubes was also tuned by varying the molar ratio of Pd to Pt salt precursors fed in the reaction. In addition, the variation in composition had a great impact on the rate of galvanic replacement, and thus the concave content of such alloy nanocrystals. These Pd-Pt alloy concave nanocubes showed composition-dependent catalytic activity for methanol oxidation, with Pd40Pt60-based catalysts exhibiting the highest activity. Compared to the commercial Pt/C, the Pd40Pt60 alloy concave nanocubes showed much improved tolerance toward CO poisoning, together with 4.6 times enhancement in specific activity for methanol oxidation due to possible synergetic effects between Pd and Pt and the unique surface structure associated with high-index facets.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available