Photovoltaic powered solar hydrogen production coupled with waste SO2 valorization enabled by MoP electrocatalysts

Jaemin Park, Hyunseok Yoon, Dong Yeop Lee, Su Geun Ji, Wooseok Yang, S. David Tilley, Myeong Chang Sung, Ik Jae Park, Jeiwan Tan, Hyungsoo Lee, Jin Young Kim, Dong Wan Kim, Jooho Moon

Research output: Contribution to journalArticlepeer-review

Abstract

In this study, we demonstrated high-rate H2 generation by coupling with the sulfite oxidation reaction (SOR) as an alternative to the oxygen evolution reaction for solar H2 production. The emerging and cost-effective molybdenum phosphide electrocatalyst was appropriately optimized and used as a bifunctional catalyst in an alkaline electrolyte for both SOR and HER. Powered by state-of-the-art perovskite–Si tandem photovoltaics, a remarkable photocurrent density of over 17 mA cm−2 was achieved in the HER coupled with the SOR. In addition to the significantly enhanced photocurrent, the SOR can further reduce the overall cost of solar H2 production owing to the elimination of the expensive membranes required for H2 and O2 gas separation. Considering the high global demand for desulfurization via the SOR, the strategy proposed here will enable practical H2 production from renewable sources while effectively converting the toxic SO2 gas into a value-added product for the chemical industry.

Original languageEnglish
Article number121045
JournalApplied Catalysis B: Environmental
Volume305
DOIs
Publication statusPublished - 2022 May 15

Keywords

  • Molybdenum phosphide
  • Solar hydrogen
  • Sulfite oxidation reaction
  • Tandem photovoltaics
  • Water splitting

ASJC Scopus subject areas

  • Catalysis
  • Environmental Science(all)
  • Process Chemistry and Technology

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