Journal
ADVANCED FUNCTIONAL MATERIALS
Volume 21, Issue 22, Pages 4364-4370Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/adfm.201101227
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Funding
- Global COE for Materials Research and Education
- Iketani Science and Technology Foundation
- Murata Science Foundation
- Inamori Foundation
- World Premier International (WPI) Research Center Initiative for Atoms, Molecules and Materials, MEXT, Japan
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A nanoporous PdNi (np-PdNi) bimetallic catalyst fabricated by electrochemically dealloying a Pd20Ni80 alloy in an acid solution is reported. Residual Ni in the nanoporous alloy can be controlled by tuning dealloying potentials and the electrocatalysis of the np-PdNi shows evident dependence on Ni concentrations. With similar to 9 at.% Ni, the np-PdNi bimetallic catalyst presents superior electrocatalytic performances in methanol and formic acid electro-oxidation as well as oxygen reduction in comparison with commercial Pd/C and nanoporous Pd (np-Pd). The excellent electrocatalytic properties of the dealloyed np-PdNi bimetallic catalyst appear to arise from the combined effect of unique bicontinuous nanoporosity and bimetallic synergistic action.
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