MoS2/WS2 Heterojunction for Photoelectrochemical Water Oxidation
By Pesci, Federico M.; Sokolikova, Maria S.; Grotta, Chiara; Sherrell, Peter C.; Reale, Francesco; Sharda, Kanudha; Ni, Na; Palczynski, Pawel; Mattevi, Cecilia
Published in ACS Catalysis
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Abstract
The solar-assisted oxidation of water is an essential half reaction for achieving a complete cycle of water splitting. The search of efficient photoanodes that can absorb light in the visible range is of paramount importance to enable cost-effective solar energy-conversion systems. Here, we demonstrate that atomically thin layers of MoS2 and WS2 can oxidize water to O2 under incident light. Thin films of solution-processed MoS2 and WS2 nanosheets display n-type positive photocurrent densities of 0.45 mA cm
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