Dual Mo-Doping in BiVO₄/FeCoNiO_x Photoanode Enables Near-Theoretical Photocurrent Density via Synergistic Bulk-Surface Engineering for Solar Water Splitting.

ABSTRACT: Bismuth vanadate (BiVO₄) is an auspicious photoanode material for photoelectrochemical (PEC) water splitting, but its performance is fundamentally limited by severe charge recombination and sluggish kinetics of the oxygen evolution reaction (OER). Herein, a dual electronic modulation strategy is developed by incorporating molybdenum (Mo) dopants simultaneously into the FeCoNiO_x cocatalyst surface and the bulk phase of BiVO₄. The resulting Mo:FeCoNiO_x/Mo:BiVO₄ photoanode delivers a near-theoretical photocurrent density of 7.15 mA cm⁻² at 1.23 V versus reversible hydrogen electrode (RHE) under AM 1.5 G illumination. This exceptional performance arises from the Mo-triggered cross-scale electronic reconstruction: (1) In the bulk, Mo substitution at vanadium (V)

SUBMITTER: Zhao R 

PROVIDER: S-EPMC12533305 | biostudies-literature | 2025 Oct

REPOSITORIES: biostudies-literature