Hydrogen-substituted graphdiyne encapsulated cuprous oxide photocathode for efficient and stable photoelectrochemical water reduction.

ABSTRACT: Photoelectrochemical (PEC) water splitting is an appealing approach for "green" hydrogen generation. The natural p-type semiconductor of Cu₂O is one of the most promising photocathode candidates for direct hydrogen generation. However, the Cu₂O-based photocathodes still suffer severe self-photo-corrosion and fast surface electron-hole recombination issues. Herein, we propose a facile in-situ encapsulation strategy to protect Cu₂O with hydrogen-substituted graphdiyne (HsGDY) and promote water reduction performance. The HsGDY encapsulated Cu₂O nanowires (HsGDY@Cu₂O NWs) photocathode demonstrates a high photocurrent density of -12.88 mA cm^-2 at 0 V versus the reversible hydrogen electrode under 1 sun illumination, approaching t

SUBMITTER: Zhou X 

PROVIDER: S-EPMC9526745 | biostudies-literature | 2022 Oct

REPOSITORIES: biostudies-literature