Three-Dimensional Bimetal-Graphene-Semiconductor Coaxial Nanowire Arrays to Harness Charge Flow for the Photochemical Reduction of Carbon Dioxide

Jungang Hou, Huijie Cheng, Osamu Takeda, Hongmin Zhu

Research output: Contribution to journalArticle

74 Citations (Scopus)

Abstract

The photochemical conversion of carbon dioxide provides a straightforward and effective strategy for the highly efficient production of solar fuels with high solar-light utilization efficiency. However, the high recombination rate of photoexcited electron-hole (e-h) pairs and the poor photostability have greatly limited their practical applications. Herein, a practical strategy is proposed to facilitate the separation of e-h pairs and enhance the photostability in a semiconductor by the use of a Schottky junction in a bimetal-graphene-semiconductor stack array. Importantly, Au-Cu nanoalloys (ca. 3nm) supported on a 3D ultrathin graphene shell encapsulating a p-type Cu2O coaxial nanowire array promotes the stable photochemical reduction of CO2 to methanol by the synergetic catalytic effect of interfacial modulation and charge-transfer channel design. This work provides a promising lead for the development of practical catalysts for sustainable fuel synthesis.

Original languageEnglish
Pages (from-to)8480-8484
Number of pages5
JournalAngewandte Chemie - International Edition
Volume54
Issue number29
DOIs
Publication statusPublished - 2015 Jul 13

Keywords

  • CuO nanowire arrays
  • carbon dioxide
  • gold
  • graphene layers
  • photoreduction

ASJC Scopus subject areas

  • Catalysis
  • Chemistry(all)

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