Blocking backward reaction on hydrogen evolution cocatalyst in a photosystem II hybrid Z-scheme water splitting system

Zhen Li, Yu Qi, Wangyin Wang, Deng Li, Zheng Li, Yanan Xiao, Guangye Han, Jian Ren Shen, Can Li

Research output: Contribution to journalArticlepeer-review

6 Citations (Scopus)

Abstract

Photocatalytic Z-scheme water splitting is considered as a promising approach to produce solar hydrogen. However, the forward hydrogen production reaction is often impeded by backward reactions. In the present study, in a photosystem II-integrated hybrid Z-scheme water splitting system, the backward hydrogen oxidation reaction was significantly suppressed by loading a PtCrOx cocatalyst on a ZrO2/TaON photocatalyst. Due to the weak chemisorption and activation of molecular hydrogen on PtCrOx, where Pt is stabilized in the oxidized forms, PtII and PtIV, hydrogen oxidation is inhibited. However, it is remarkably well-catalyzed by the metallic Pt cocatalyst, thereby rapidly consuming the produced hydrogen. This work describes an approach to inhibit the backward reaction in the photosystem II-integrated hybrid Z-scheme water splitting system using Fe(CN)63−/Fe(CN)64− redox couple as an electron shuttle.

Original languageEnglish
Pages (from-to)486-494
Number of pages9
JournalChinese Journal of Catalysis
Volume40
Issue number4
DOIs
Publication statusPublished - Apr 2019

Keywords

  • Backward reaction
  • Cocatalyst
  • Hydrogen oxidation
  • Photosystem II
  • Water splitting

ASJC Scopus subject areas

  • Catalysis
  • Chemistry(all)

Fingerprint Dive into the research topics of 'Blocking backward reaction on hydrogen evolution cocatalyst in a photosystem II hybrid Z-scheme water splitting system'. Together they form a unique fingerprint.

Cite this