Journal
ACS NANO
Volume 9, Issue 8, Pages 8108-8115Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsnano.5b02191
Keywords
cobalt phosphide nanorods; oxygen reduction reaction; electrocatalysis
Categories
Funding
- National Science Foundation MRSEC [DMR-1120901]
- NatureNet Science Fellowship from Nature Conservancy
- Army Research Office [ARO-W911NF-13-1-0363]
- U.S. Department of Energy, Office of Basic Energy Sciences [DE-SC0012704]
- U.S. DOE [DE-AC02-06CH11357]
- Richard Perry University Professorship
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Low temperature fuel cells are clean, effective alternative fuel conversion technology. Oxygen reduction reaction (ORR) at the fuel cell cathode has required Pt as the electrocatalyst for high activity and selectivity of the four-electron reaction pathway. Targeting a less expensive, earth abundant alternative, we have developed the synthesis of cobalt phosphide (Co2P) nanorods for ORR. Characterization techniques that include total X-ray scattering and extended X-ray absorption fine structure revealed a deviation of the nanorods from bulk crystal structure with a contraction along the b orthorhombic lattice parameter. The carbon supported nanorods have comparable activity but are remarkably more stable than conventional Pt catalysts for the oxygen reduction reaction in alkaline environments.
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