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Photocatalytic Carbon Dioxide Reduction at p‐Type Copper(I) Iodide
Author(s) -
Baran Tomasz,
Wojtyła Szymon,
Dibenedetto Angela,
Aresta Michele,
Macyk Wojciech
Publication year - 2016
Publication title -
chemsuschem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.412
H-Index - 157
eISSN - 1864-564X
pISSN - 1864-5631
DOI - 10.1002/cssc.201600289
Subject(s) - photocatalysis , titanium dioxide , semiconductor , carbon dioxide , scavenger , chemistry , irradiation , photochemistry , copper , inorganic chemistry , iodide , electrochemical reduction of carbon dioxide , materials science , carbon monoxide , catalysis , radical , optoelectronics , organic chemistry , metallurgy , physics , nuclear physics
A p‐type semiconductor, CuI, has been synthesized, characterized, and tested as a photocatalyst for CO 2 reduction under UV/Vis irradiation in presence of isopropanol as a hole scavenger. Formation of CO, CH 4 , and/or HCOOH was observed. The photocatalytic activity of CuI was attributed to the very low potential of the conduction band edge (i.e., −2.28 V vs. NHE). Photocurrents generated by the studied material confirm a high efficiency of the photoinduced interfacial electrontransfer processes. Our studies show that p‐type semiconductors may be effective photocatalysts for CO 2 reduction, even better than extensively studied n‐type titanium dioxide, owing to the low potential of the conduction band edge.