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


Park, Jaemin; Yoon, Hyunseok; Lee, Dong-Yeop; Ji, Su Geun; Yang, Wooseok; Tilley, S David; Sung, Myeong-Chang; Park, Ik Jae; Tan, Jeiwan; Lee, Hyungsoo; Kim, Jin Young; Kim, Dong-Wan; Moon, Jooho (2022). Photovoltaic powered solar hydrogen production coupled with waste SO2 valorization enabled by MoP electrocatalysts. Applied Catalysis B: Environmental, 305:121045.

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.

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.

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Additional indexing

Item Type:Journal Article, refereed, original work
Communities & Collections:07 Faculty of Science > Department of Chemistry
Dewey Decimal Classification:540 Chemistry
Scopus Subject Areas:Physical Sciences > Catalysis
Physical Sciences > General Environmental Science
Physical Sciences > Process Chemistry and Technology
Uncontrolled Keywords:Process Chemistry and Technology, General Environmental Science, Catalysis
Language:English
Date:1 May 2022
Deposited On:31 Mar 2022 07:44
Last Modified:28 May 2024 01:36
Publisher:Elsevier
ISSN:0926-3373
OA Status:Closed
Publisher DOI:https://doi.org/10.1016/j.apcatb.2021.121045
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