The photocatalytic overall water splitting hydrogen production of g-C3N4/CdS hollow core–shell heterojunction via the HER/OER matching of Pt/MnOx

By Jiaqi Pan, Panhong Wang, Peipei Wang, Qingtao Yu, Jingjing Wang, Changsheng Song, Yingying Zheng, Chaorong Li. 2021

163 citations recorded by the source corpus.

Abstract The matching of HER/OER process is a significant issue for photocatalytic overall water splitting. The MnOx/g-C3N4/CdS/Pt hollow core–shell heterojunction is prepared via a continuous chemical-annealing-photoreduction method. There, the as-prepared MnOx/g-C3N4/CdS/Pt composite exhibits an obvious HER enhancement of about ~ 80 folds than single CdS, a remarkable overall water splitting performance of about ~ 1303.39(H2)/641.60(O2) μmol∙g−1∙h−1, and a decent photocatalytic stability, which can be mainly ascribed to that, with the remarkable matching of HER/OER process, the Pt nanoparticles with quickly charge carriers transport can accept/diffuse the photo-generated electrons into water, the high chemical valance manganese ions can excite the hole­related species and accelerate the H2O2 decomposition, the formation of g-C3N4/CdS heterojunction can promote photo-generated carriers separation/transport via the appropriate potential, and the hollow structure can increase the HER/OER active sites, solar efficiency and stability.

Subfields: Electrical and Electronic Engineering, Materials Chemistry, Renewable Energy, Sustainability and the Environment

View Paper: https://www.semanticscholar.org/paper/b43c3fd119d18f6ceb0bf9478b367b6741bcda16