A Semi-artificial Photoelectrochemical Tandem Leaf with a CO2-to-Formate Efficiency Approaching 1 %

Esther Edwardes Moore, Virgil Andrei, Ana Rita Oliveira, Ana Margarida Coito, Inês A.C. Pereira, Erwin Reisner

Research output: Contribution to journalArticlepeer-review

5 Citations (Scopus)

Abstract

Semi-artificial photoelectrochemistry can combine state-of-the-art photovoltaic light-absorbers with enzymes evolved for selective fuel-forming reactions such as CO2 reduction, but the overall performance of such hybrid systems has been limited to date. Here, the electrolyte constituents were first tuned to establish an optimal local environment for a W-formate dehydrogenase to perform electrocatalysis. The CO2 reductase was then interfaced with a triple cation lead mixed-halide perovskite through a hierarchically structured porous TiO2 scaffold to produce an integrated photocathode achieving a photocurrent density of −5 mA cm−2 at 0.4 V vs. the reversible hydrogen electrode during simulated solar light irradiation. Finally, the combination with a water-oxidizing BiVO4 photoanode produced a bias-free integrated biophotoelectrochemical tandem device (semi-artificial leaf) with a solar CO2-to-formate energy conversion efficiency of 0.8 %.

Original languageEnglish
Pages (from-to)26303-26307
Number of pages5
JournalAngewandte Chemie - International Edition
Volume60
Issue number50
DOIs
Publication statusPublished - 6 Dec 2021

Keywords

  • CO reduction
  • electrochemistry
  • enzyme catalysis
  • perovskites
  • semi-artificial leaf

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