Nitrogen-incorporation activates NiFeO_x catalysts for efficiently boosting oxygen evolution activity and stability of BiVO₄ photoanodes.

ABSTRACT: Developing low-cost and highly efficient catalysts toward the efficient oxygen evolution reaction (OER) is highly desirable for photoelectrochemical (PEC) water splitting. Herein, we demonstrated that N-incorporation could efficiently activate NiFeO_x catalysts for significantly enhancing the oxygen evolution activity and stability of BiVO₄ photoanodes, and the photocurrent density has been achieved up to 6.4 mA cm^-2 at 1.23 V (vs. reversible hydrogen electrode (RHE), AM 1.5 G). Systematic studies indicate that the partial substitution of O sites in NiFeO_x catalysts by low electronegative N atoms enriched the electron densities in both Fe and Ni sites. The electron-enriched Ni sites conversely donated electrons to V sites of BiVO₄ for r

SUBMITTER: Zhang B 

PROVIDER: S-EPMC8630083 | biostudies-literature | 2021 Nov

REPOSITORIES: biostudies-literature