10.17863/CAM.46957
Edwardes Moore, Esther
Andrei, Virgil
0000-0002-6914-4841
Zacarias, Sónia
Pereira, Inês AC
Reisner, Erwin
0000-0002-7781-1616
Integration of a Hydrogenase in a Lead Halide Perovskite Photoelectrode for Tandem Solar Water Splitting.
American Chemical Society (ACS)
2020
3403 Macromolecular and Materials Chemistry
34 Chemical Sciences
3406 Physical Chemistry
7 Affordable and Clean Energy
Apollo - University of Cambridge Repository
University of Cambridge
013meh722
2019-12-14
2019-12-14
2020-01-10
eng
Article
https://www.repository.cam.ac.uk/handle/1810/299887
10.1021/acsenergylett.9b02437
All rights reserved
open.access
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 Desulfovibrio vulgaris Hildenborough, a highly active enzyme for H2 generation, with a triple cation mixed halide perovskite. The perovskite-hydrogenase photoelectrode produces a photocurrent of -5 mA cm-2 at 0 V vs RHE during AM1.5G irradiation, is stable for 12 h and the hydrogenase exhibits a turnover number of 1.9 × 106. The positive onset potential of +0.8 V vs RHE allows its combination with a BiVO4 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.
European Research Council
682833