Key role of e_g^* band broadening in nickel-based oxyhydroxides on coupled oxygen evolution mechanism.

ABSTRACT: A coupled oxygen evolution mechanism (COM) during oxygen evolution reaction (OER) has been reported in nickel oxyhydroxides (NiOOH)-based materials by realizing e_g^* band (3d electron states with e_g symmetry) broadening and light irradiation. However, the link between the e_g^* band broadening extent and COM-based OER activities remains unclear. Here, Ni_1-xFe_xOOH (x = 0, 0.05, 0,2) are prepared to investigate the underlying mechanism governing COM-based activities. It is revealed that in low potential region, realizing stronger e_g^* band broadening could facilitate the ^*OH deprotonation. Meanwhile, in high potential region where the photon utilization is the rate-determining step, a st

SUBMITTER: Zhong H 

PROVIDER: S-EPMC10657368 | biostudies-literature | 2023 Nov

REPOSITORIES: biostudies-literature