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Heterogeneous Photocatalysis, IX. Zinc Sulfide Catalyzed Photoreduction of Carbon Dioxide
Author(s) -
Kisch Horst,
Twardzik Gerhard
Publication year - 1991
Publication title -
chemische berichte
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.667
H-Index - 136
eISSN - 1099-0682
pISSN - 0009-2940
DOI - 10.1002/cber.19911240529
Subject(s) - chemistry , photocatalysis , carbon fixation , zinc , zinc sulfide , catalysis , sulfide , photochemistry , electron transfer , carbon dioxide , inorganic chemistry , formate , electrochemical reduction of carbon dioxide , carbon monoxide , organic chemistry
Carbon dioxide is catalytically reduced to formate in a suspension of zinc sulfide in water/2,5‐dihydrofuran when irradiated (λ ≥ 290 nm). Turnover rates are in the range of 1.5 monolayers CO 2 /h. No reaction occurs at pH=12, and a very slow one at pH=3.2,5‐Dihydrofuran functions as reducing agent which is oxidized to dehydro dimers. When it is substituted by 2‐propanol, no CO 2 reduction is observed. Semiconductor photocatalysis by a two‐electron transfer from zinc sulfide to adsorbed hydrogen carbonate is assumed as the key step of CO 2 fixation.