Understanding Synergism of Cobalt Metal and Copper Oxide toward Highly Efficient Electrocatalytic Oxygen Evolution
Autor: | Zhao Li, Yang Yang, Licheng Ju, Wenhan Niu, Jianjian Shi, Nina Orlovskaya, Yuanyue Liu |
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Rok vydání: | 2018 |
Předmět: |
Copper oxide
Chemistry Oxide Oxygen evolution chemistry.chemical_element 02 engineering and technology General Chemistry 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Catalysis 0104 chemical sciences chemistry.chemical_compound Nickel Transition metal Chemical engineering 0210 nano-technology Bimetallic strip Cobalt |
Zdroj: | ACS Catalysis. 8:12030-12040 |
ISSN: | 2155-5435 |
Popis: | Understanding the synergism of bimetallic transition metal (TM)-based catalysts for oxygen evolution reaction (OER) is very difficult because it is complicated to identify the surface active sites in a bimetal system. Herein, we rationally designed Cu oxide (CuOx) nanoarray film (NF) as an example to investigate the synergism and doping effects of iron group metals on OER. This is an advantage because CuOx is electrocatalytically inert and oxidatively stable, which is much better than carbon-based platforms. Especially, cobalt (Co) shows a much stronger synergism as compared with nickel (Ni) and iron (Fe). By introducing Co into the inert CuOx NFs, the Co active sites can be correlated to the OER activity by rationally regulating the morphology of CuOx NFs. In addition, the phase transformation from Cu2O to CuO occurs during the OER testing, further boosting the OER activity of Co-doped CuOx NF due to the hybridization change of Co active site. As a result, the Co-doped CuOx NF with 0.30 at. % Co (denoted... |
Databáze: | OpenAIRE |
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