CoSe as non-noble-metal cocatalyst integrated with heterojunction photosensitizer for inexpensive H2 production under visible light

Rana Muhammad Irfan, Mudassir Hussain Tahir, Mudassar Maqsood, Yanping Lin, Tariq Bashir, Shahid Iqbal, Jianqing Zhao, Lijun Gao, Muhammad Haroon

Research output: Journal PublicationArticlepeer-review

53 Citations (Scopus)

Abstract

The development of inexpensive cocatalysts based on earth-abundant-elements, is highly demanding strategy to produce large-scale photocatalytic H2 for real-life applications. Herein, we report the utilization of CoSe as a highly efficient cocatalyst to significantly improve the photocatalytic H2 production on ZnSe/CdS under visible irradiation. The maximum H2 production rate of 785 μmol h−1 was attained under optimized conditions. Furthermore, the current system showed robust stability up to 30 h of irradiation and more than 23 mmol of H2 was produced. The highest apparent quantum yield of the system was 55.3% at monochromatic 420 nm light. Photocurrent responses, UV–vis diffuse reflectance absorption spectroscopy, electrochemical impedance spectroscopy and photoluminescence (PL) spectroscopy were used to explain the mechanistic roles of CoSe and ZnSe in current photocatalytic system. This work showcased the successful usage of CoSe as cocatalyst and ZnSe as visible light active semiconductor for inexpensive conversion of solar energy to H2.

Original languageEnglish
Pages (from-to)196-205
Number of pages10
JournalJournal of Catalysis
Volume390
DOIs
Publication statusPublished - Oct 2020
Externally publishedYes

Keywords

  • Charge separation
  • CoSe
  • Cocatalyst
  • H production
  • ZnSe/CdS

ASJC Scopus subject areas

  • Catalysis
  • Physical and Theoretical Chemistry

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