期刊
NANO LETTERS
卷 17, 期 4, 页码 2727-2731出版社
AMER CHEMICAL SOC
DOI: 10.1021/acs.nanolett.7b00870
关键词
Palladium; tungsten oxide; nanohybrids; formic acid oxidation; electrocatalysis
类别
资金
- U.S. Army Research Laboratory
- U.S. Army Research Office [W911NF-15-1-0147]
- Multi University Research Initiative (MURI) [W911NF-11-1-0353]
- NSERC
- U.S. Department of Energy (DOE)
- NSERC Canada
- University of Washington
- Canadian Light Source (CLS)
- APS
- DOE [DE-AC02-06CH11357]
- CIHR
- NRC
- University of Saskatchewan
- National Science Foundation [1644760]
We synthesize a new type of hybrid Pd/WO2.72 structure with 5 nm Pd nanoparticles (NPs) anchored on 50 X 5 nm WO2.72 nanorods. The strong Pd/WO2.72 coupling results in the lattice expansion of Pd from 0.23 to 0.27 nm and the decrease of Pd surface electron density. As a result, the Pd/WO2.72 shows much enhanced catalysis toward electrochemical oxidation of formic acid in 0.1 M HClO4; it has a mass activity of similar to 1600 mA/mg(Pd) in a broad potential range of 0.4-0.85 V (vs RHE) and shows no obvious activity loss after a 12 h chronoamperometry test at 0.4 V. Our work demonstrates an important strategy to enhance Pd NP catalyst efficiency for energy conversion reactions.
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