Steering Catalytic Activity and Selectivity of CO2 Photoreduction to Syngas with Hydroxy-Rich Cu2S@ROH-NiCo2O3 Double-Shelled Nanoboxes

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

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Author(s)

  • Lei Li
  • Xinyan Dai
  • De-Li Chen
  • Yinxiang Zeng
  • Yong Hu

Detail(s)

Original languageEnglish
Article numbere202205839
Journal / PublicationAngewandte Chemie - International Edition
Volume61
Issue number35
Online published13 Jun 2022
Publication statusPublished - 26 Aug 2022
Externally publishedYes

Abstract

Simultaneous transformation of CO2 and H2O into syngas (CO and H2) using solar power is desirable for industrial applications. Herein, an efficient photocatalyst based on double-shelled nanoboxes, with an outer shell of hydroxy-rich nickel cobaltite nanosheets and an inner shell of Cu2S (Cu2S@ROH-NiCo2O3), is prepared via a multistep templating strategy. The high performance of Cu2S@ROH-NiCo2O3 (7.1 mmol g−1 h−1 for CO; 2.8 mmol g−1 h−1 for H2) is attributed to the hierarchical hollow geometry and p–n heterojunction to promote light absorption and charge separation. Spectroscopic and theoretical analyses elucidate that the ROH-NiCo2O3 surface enhances *CO2 adsorption and lowers energy barriers for CO2-to-CO. Therefore, modulating the hydroxy contents of ROH-NiCo2O3 can achieve broad CO/H2 ratios from 0.51 to 1.24. This work offers in-depth insights into adjustable syngas photosynthesis and generalized concepts of selective heterogeneous CO2 photoreduction beyond cobalt-based oxides. © 2022 Wiley-VCH GmbH.

Research Area(s)

  • CO2 Photoreduction, Cu2S Nanoboxes, Hydroxy-Rich, NiCO2O3 Nanosheets, p–n Heterojunction

Citation Format(s)

Steering Catalytic Activity and Selectivity of CO2 Photoreduction to Syngas with Hydroxy-Rich Cu2S@ROH-NiCo2O3 Double-Shelled Nanoboxes. / Li, Lei; Dai, Xinyan; Chen, De-Li et al.
In: Angewandte Chemie - International Edition, Vol. 61, No. 35, e202205839, 26.08.2022.

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