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Nanoporous PdNi Bimetallic Catalyst with Enhanced Electrocatalytic Performances for Electro‐oxidation and Oxygen Reduction Reactions |
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| Authors: | Luyang Chen Hai Guo Takeshi Fujita Akihiko Hirata Wei Zhang Akihisa Inoue Mingwei Chen |
| Affiliation: | 1. World Premier International (WPI) Research Center, Advanced Institute for Materials Research, Tohoku University, Sendai 980‐8577, Japan;2. Institute for Materials Research, Tohoku University, Sendai 980‐8577, Japan;3. World Premier International (WPI) Research Center, Advanced Institute for Materials Research, Tohoku University, Sendai 980‐8577, Japan, State Key Laboratory of Metal Matrix Composites, School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai 200030, P. R. China |
| Abstract: | 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 ～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. |
| Keywords: | nanoporous metal palladium‐nickel catalyst electrooxidation oxygen reduction |