Accelerated active phase transformation of NiO powered by Pt single atoms for enhanced oxygen evolution reaction.

ABSTRACT: Phase transformation of electrode materials widely occurs in electrocatalytic reactions. Metal oxides are promising electrocatalysts for the oxygen evolution reaction (OER); their phase transformation is a key step for the multi-electron OER, and requires extra overpotential. However, little attention has been paid to accelerating and enhancing the phase transformation. Here, we report for the first time that single-atom Pt incorporated into the bulk crystalline phase of porous NiO nanocubes (0.5 wt% Pt/NiO) can greatly promote the active phase (NiOOH) evolution. The Pt doping was achieved by a scalable nanocasting approach using SiO₂ as the hard template. In comparison with Pt/NiO samples with PtO₂ nanoparticles segregated at the NiO surface (1 wt% Pt), as well as at

SUBMITTER: Lin C 

PROVIDER: S-EPMC6114998 | biostudies-literature | 2018 Sep

REPOSITORIES: biostudies-literature