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Hybrid Photocathodes for Carbon Dioxide Reduction: Interfaces for Charge Separation and Selective Catalysis
Author(s) -
Garcia Osorio Dora Alicia,
Neri Gaia,
Cowan Alexander J.
Publication year - 2021
Publication title -
chemphotochem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.13
H-Index - 18
ISSN - 2367-0932
DOI - 10.1002/cptc.202000309
Subject(s) - electrochemical reduction of carbon dioxide , semiconductor , carbon dioxide , electrocatalyst , reduction (mathematics) , water splitting , hydrogen , carbon fibers , nanotechnology , materials science , catalysis , optoelectronics , chemistry , photocatalysis , electrode , electrochemistry , organic chemistry , carbon monoxide , geometry , mathematics , composite material , composite number
Light‐driven carbon dioxide reduction at photocathodes was first reported over 40 years ago, however the efficiency and stability of the state‐of‐the‐art lies behind water splitting photocathodes and photoanodes. Issues have included the low selectivities towards carbon dioxide reduction (versus hydrogen evolution) and short charge separation lifetimes. “Hybrid” photocathodes, where a light absorbing semiconductor is used with a selective molecular electrocatalyst, are now emerging as a promising way to address these issues. Here we provide a review of hybrid photoelectrodes reported for CO 2 reduction. Focusing on the semiconductor/molecular catalyst interface, we evaluate the operating principles and design features of the materials reported to date and propose new directions for the field.