Artificial Photosynthetic System with Spatial Dual Reduction Site Enabling Enhanced Solar Hydrogen Production

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

2 Scopus Citations
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Author(s)

  • Xiaowen Ruan
  • Depeng Meng
  • Chengxiang Huang
  • Minghua Xu
  • Dongxu Jiao
  • Hui Cheng
  • Yi Cui
  • Zhiyun Li
  • Kaikai Ba
  • Tengfeng Xie
  • Lei Zhang
  • Wei Zhang
  • Jing Leng
  • Shengye Jin
  • Zhifeng Jiang
  • Weitao Zheng
  • Xiaoqiang Cui
  • Jiaguo Yu

Related Research Unit(s)

Detail(s)

Original languageEnglish
Article number2309199
Journal / PublicationAdvanced Materials
Publication statusOnline published - 27 Nov 2023

Abstract

Although S-scheme artificial photosynthesis shows promise for photocatalytic hydrogen production, traditional methods often overly concentrate on a single reduction site. This limitation results in inadequate redox capability and inefficient charge separation, which hampers the efficiency of the photocatalytic hydrogen evolution reaction. To overcome this limitation, a double S-scheme system is proposed that leverages dual reduction sites, thereby preserving energetic photo-electrons and holes to enhance apparent quantum efficiency. The design features a double S-scheme junction consisting of CdS nanospheres decorated with anatase TiO2 nanoparticles coupled with graphitic C3N4. The as-prepared catalyst exhibits a hydrogen evolution rate of 26.84 mmol g−1 h−1 and an apparent quantum efficiency of 40.2% at 365 nm. This enhanced photocatalytic hydrogen evolution is ascribed to the efficient charge separation and transport induced by the double S-scheme. Both theoretical calculations and comprehensive spectroscopy tests (both in situ and ex situ) affirm the efficient charge transport across the catalyst interface. Moreover, substituting the reduction-type catalyst CdS with other similar sulfides like ZnIn2S4, ZnS, MoS2 and In2S3 further confirms the feasibility of the proposed double S-scheme configuration. The findings provide a pathway to designing more effective double S-scheme artificial photosynthetic systems, opening up fresh perspectives in enhancing photocatalytic hydrogen evolution performance. © 2023 Wiley-VCH GmbH.

Research Area(s)

  • artificial photosynthetic system, double S-scheme, dual reduction site, hydrogen evolution, photocatalyst

Citation Format(s)

Artificial Photosynthetic System with Spatial Dual Reduction Site Enabling Enhanced Solar Hydrogen Production. / Ruan, Xiaowen; Meng, Depeng; Huang, Chengxiang et al.
In: Advanced Materials, 27.11.2023.

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