Integration of a Hydrogenase in a Lead Halide Perovskite Photoelectrode for Tandem Solar Water Splitting.

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2020
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Abstract
Lead halide perovskite solar cells are notoriously moisture-sensitive, but recent encapsulation strategies have demonstrated their potential application as photoelectrodes in aqueous solution. However, perovskite photoelectrodes rely on precious metal co-catalysts, and their combination with biological materials remains elusive in integrated devices. Here, we interface [NiFeSe] hydrogenase from Hildenborough, a highly active enzyme for H generation, with a triple cation mixed halide perovskite. The perovskite-hydrogenase photoelectrode produces a photocurrent of -5 mA cm at 0 V vs RHE during AM1.5G irradiation, is stable for 12 h and the hydrogenase exhibits a turnover number of 1.9 × 10. The positive onset potential of +0.8 V vs RHE allows its combination with a BiVO water oxidation photoanode to give a self-sustaining, bias-free photoelectrochemical tandem system for overall water splitting (solar-to-hydrogen efficiency of 1.1%). This work demonstrates the compatibility of immersed perovskite elements with biological catalysts to produce hybrid photoelectrodes with benchmark performance, which establishes their utility in semiartificial photosynthesis.
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edwardes-moore2020integrationacs Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors Edwardes Moore, Esther;Andrei, Virgil;Zacarias, Sónia;Pereira, Inês A C;Reisner, Erwin;
Journal acs energy letters
Year 2020
DOI 10.1021/acsenergylett.9b02437
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Keywords
evolvability phenotypic variation morphometrics cranial shape developmental canalization morphological integration self-similarity

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