Efficient Photochemical Water Splitting by a Chemically Modified n‐TiO₂.

Abstract

0.15, is synthesized by controlled combustion of Ti metal in a natural gas flame. This material absorbs light at wavelengths below 535 nm and has a lower band gap energy than rutile. At an applied potential of 0.3 V it performs water splitting with a total conversion efficiency of 11% and a maximum photoconversion efficiency of 8.35% when illuminated at 40 mW/cm -2 . The latter value compares favorably with a maximum photoconversion efficiency of 1% for n-type TiO 2 biased at 0.6 V. -(KHAN*, S. U. M.; AL-SHAHRY, M.; INGLER JR.

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