期刊
ELECTROCHEMISTRY COMMUNICATIONS
卷 79, 期 -, 页码 41-45出版社
ELSEVIER SCIENCE INC
DOI: 10.1016/j.elecom.2017.04.014
关键词
Electrocatalysis; Oxygen evolution reaction; Co phosphide; Ni phosphide; Transition metal phosphide
资金
- Deutsche Forschungsgemeinschaft (DFG) [EXC1069]
- Bundesministerium fur Bildung and Forschung (BMBF) [FKZ 03EK3548, FKZ 03SF0497B]
Prompted by the impact of Ni-based support materials on the intrinsic activity of electrocatalysts, we investigated the influence of partial Co substitution by Ni during the reductive thermal synthesis of cobalt-cobalt phosphide nanoparticles from triphenylphosphine complexes. The obtained catalysts were characterised by X-ray diffraction and electrochemistry. Increasing the amount of Ni in the precursor complexes leads to materials with lower overpotential for the OER at low current densities, and lower Tafel slopes. Co nanoparticles, which are only formed in materials with low Ni content, increase the intrinsic material conductivity and reduce the OER overpotential at high current densities.
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