ACS Appl Mater Interfaces 2021 Apr 6. Epub 2021 Apr 6.
CAS Key Laboratory of Green Process and Engineering, State Key Laboratory of Biochemical Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China.
Exploiting precious-metal-free and high-activity oxygen evolution reaction (OER) electrocatalysts has been in great demands toward many energy storage and conversion processes, for example, carbon dioxide reduction, metal-air batteries, and water splitting. In this study, the simple solid-state method is employed for coupling Ni (electron donors) with lower-Fermi-level MoO or WO (electron acceptors) into donor-acceptor ensembles with well-designed interfaces as robust electrocatalysts for OER. The resulting Ni/MoO and Ni/WO electrocatalysts exhibit smaller overpotentials of 287 and 333 mV at 10 mA cm as well as smaller Tafel slopes of 51 and 65 mV/dec, respectively, with respect to the single Ni, MoO, WO, and even the benchmark RuO in 1 M KOH. Read More