Stability of CoP _x Electrocatalysts in Continuous and Interrupted Acidic Electrolysis of Water.

ABSTRACT: Cobalt phosphides are an emerging earth-abundant alternative to platinum-group-metal-based electrocatalysts for the hydrogen evolution reaction (HER). Yet, their stability is inferior to platinum and compromises the large-scale applicability of CoP _x in water electrolyzers. In the present study, we employed flat, thin CoP _x electrodes prepared through the thermal phosphidation (PH₃) of Co₃O₄ films made by plasma-enhanced atomic layer deposition to evaluate their stability in acidic water electrolysis by using a multi-technique approach. The films were found to be composed of two phases: CoP in the bulk and a P-rich surface CoP _x (P/Co>1). Their performance was evaluated in the HER and the exchange curren

SUBMITTER: Goryachev A 

PROVIDER: S-EPMC5915747 | biostudies-literature | 2018 Apr

REPOSITORIES: biostudies-literature