Integrating Perovskite Photovoltaics and Noble-Metal-Free Catalysts toward Efficient Solar Energy Conversion and H 2 S Splitting

Weiguang Ma, Jingfeng Han, Wei Yu, Dong Yang, Hong Wang, Xu Zong, Can Li

Research output: Contribution to journalArticle

16 Citations (Scopus)

Abstract

Hydrogen sulfide (H 2 S) has been considered as a potential hydrogen source. Identifying efficient solar-driven processes and low-cost materials that can extract hydrogen from H 2 S is highly attractive. Herein, for the first time, we reported the establishment of a perovskite photovoltaic-electrolysis (PV-EC) H 2 S splitting system by integrating a single perovskite solar cell, noble-metal-free catalysts, and H 2 S splitting reaction with the aid of mediators. The as-established system delivered a solar-to-chemical energy conversion efficiency of up to 13.5% during the PV-EC step by using molybdenum-tungsten phosphide (Mo-W-P) as the catalyst for a hydrogen evolution reaction (HER) and a graphite carbon sheet as the catalyst for the oxidation of mediators, respectively. To the best of our knowledge, this is among the highest value ever reported for the artificial conversion of solar to chemical energy using perovskite solar cells. Moreover, upon integration with the PV-EC system, a H 2 S splitting reaction with a net energy conversion efficiency of 3.5% can be accomplished, and the overall energy consumption to obtain an equivalent amount of H 2 from H 2 S is reduced by ca. 43.3% compared with that from water splitting. This paradigm of producing value-added chemicals by consuming negative value waste products is solely based on low-cost materials and a simpler system configuration, which significantly improves the economic sustainability of the process.

Original languageEnglish (US)
Pages (from-to)6198-6206
Number of pages9
JournalACS Catalysis
Volume6
Issue number9
DOIs
StatePublished - Sep 2 2016

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Precious metals
Energy conversion
Electrolysis
Perovskite
Solar energy
Hydrogen
Catalysts
Conversion efficiency
Hydrogen Sulfide
Tungsten
Molybdenum
Graphite
Costs
Sustainable development
Carbon
Energy utilization
Hydrogen sulfide
Oxidation
Economics
Water

All Science Journal Classification (ASJC) codes

  • Catalysis
  • Chemistry(all)

Cite this

Ma, Weiguang ; Han, Jingfeng ; Yu, Wei ; Yang, Dong ; Wang, Hong ; Zong, Xu ; Li, Can. / Integrating Perovskite Photovoltaics and Noble-Metal-Free Catalysts toward Efficient Solar Energy Conversion and H 2 S Splitting In: ACS Catalysis. 2016 ; Vol. 6, No. 9. pp. 6198-6206.
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Integrating Perovskite Photovoltaics and Noble-Metal-Free Catalysts toward Efficient Solar Energy Conversion and H 2 S Splitting . / Ma, Weiguang; Han, Jingfeng; Yu, Wei; Yang, Dong; Wang, Hong; Zong, Xu; Li, Can.

In: ACS Catalysis, Vol. 6, No. 9, 02.09.2016, p. 6198-6206.

Research output: Contribution to journalArticle

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