Steering Hole Transfer from the Light Absorber to Oxygen Evolution Sites for Photocatalytic Overall Water Splitting

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review

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Author(s)

  • Shuquan Huang
  • Jianjian Yi
  • Yichen Pan
  • Chongtai Wang
  • Yanhua Song
  • Yuanguo Xu
  • Huaming Li
  • Hui Xu

Detail(s)

Original languageEnglish
Article number2101158
Journal / PublicationAdvanced Materials Interfaces
Volume8
Issue number22
Online published24 Oct 2021
Publication statusPublished - 23 Nov 2021

Abstract

Harvesting solar energy to realize water splitting into H2 and O2 in 2:1 stoichiometric without using any sacrificial agents and external bias confronts a big challenge. Herein, the authors demonstrate that engineering the hole transfer kinetic by embedding reduced graphene oxide (rGO) in the interface of light absorber (2D carbon nitride, 2D g-CN) and oxygen evolution cocatalysts (MOx, M = Fe, Co, Ni) can both tune the hole extraction rate and oxygen evolution performance. As a result of breaking the rate-determining step (i.e., oxygen evolution reaction) in overall water splitting, the optimal Pt/2D g-CN/rGO-FeOx photocatalyst can evolve H2 and O2 in pure water with the rates of 14.07 and 7.03 µmol h−1, respectively, showing roughly higher gas evolution rates and also excellent stability compared to the photocatalysts without hole transport engineering. This work reveals the feasibility of overall water splitting by tuning the oxygen evolution dynamic and affords a versatile strategy for designing cocatalyst/photocatalyst systems for efficient photocatalysis.

Research Area(s)

  • carbon nitride, hole transport, photocatalysis, reduced graphene oxide, water splitting

Citation Format(s)

Steering Hole Transfer from the Light Absorber to Oxygen Evolution Sites for Photocatalytic Overall Water Splitting. / Huang, Shuquan; Yi, Jianjian; Pan, Yichen et al.
In: Advanced Materials Interfaces, Vol. 8, No. 22, 2101158, 23.11.2021.

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review