ChemInform Abstract CO2 reduction is studied in alkali metal carbonates, sulfates, phosphates, and perchlorates, as well as in tetraalkylammonium salts. In all the electrolytes, slight corrosion of the p-CdTe and p-InP electrodes is observed. In carbonate solution, formic acid production is favored, whereas the other electrolytes favor CO formation. The highest current efficiency, > 80%, is observed at p-CdTe in the presence of tetraalkylammonium salts. The experimental results obtained for both the electrodes are in agreement with those expected from the difference in hydrophilicity between the two semiconductors.
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