Hollow CoP octahedral nanoparticles have been prepared, and they show exceptionally high intrinsic activity for both the oxygen evolution and methanol oxidation reactions.
We report a simple low-cost concept for the preparation of water-oxidation electrocatalyst via modification of self-supported Ni 5 P 4 −Ni 2 P foam catalyst precursor with Al. As an anode for alkaline oxygen evolution reaction, this material exhibits an impressive Tafel slope of 27 mV dec −1 and offers anodic current densities of 10, 100, and 300 mA cm −2 at overpotentials of merely 180, 247, and 312 mV, respectively. Moreover, the anode demonstrates high operational stability, as reflected by a steady-state performance for more than 8 days. Combining state-of-the-art electron microscopy and photoelectron spectroscopy, we investigated the role of the Al dopant in the formation of active Ni(OH) 2 /NiO/Ni 5 P 4 −Ni 2 P nanocatalyst, which exhibits oxygen-evolving activity among the highest reported to date.
The surface chemistry of the activated carbon supporting material was tailored to investigate the influence of O and N groups as well as O-free Lewis basic sites on the performance...
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