title: One-step overall water splitting under visible light using multiband InGaN/GaN nanowire heterostructures.
abstract: The conversion of solar energy into hydrogen via water splitting process is one of the key sustainable technologies for future clean, storable, and renewable source of energy. Therefore, development of visible light-responsive and efficient photocatalyst material has been of immense interest, but with limited success. Here, we show that overall water splitting under visible-light irradiation can be achieved using a single photocatalyst material. Multiband InGaN/GaN nanowire heterostructures, decorated with rhodium (Rh)/chromium-oxide (Cr2O3) core-shell nanoparticles can lead to stable hydrogen production from pure (pH ∼ 7.0) water splitting under ultraviolet, blue and green-light irradiation (up to ∼560 nm), the longest wavelength ever reported. At ∼440-450 nm wavelengths, the internal quantum efficiency is estimated to be ∼13%, the highest value reported in the visible spectrum. The turnover number under visible light well exceeds 73 in 12 h. Detailed analysis further confirms the stable photocatalytic activity of the nanowire heterostructures. This work establishes the use of metal-nitrides as viable photocatalyst for solar-powered artificial photosynthesis for the production of hydrogen and other solar fuels.
authors: Department of Electrical and Computer Engineering, McGill University , 3480 University Street, Montreal, Québec H3A 0E9, Canada.
authors: Md G
authors: MG
authors: Kibria
authors: Hieu P T
authors: HP
authors: Nguyen
authors: Kai
authors: K
authors: Cui
authors: Songrui
authors: S
authors: Zhao
authors: Dongping
authors: D
authors: Liu
authors: Hong
authors: H
authors: Guo
authors: Michel L
authors: ML
authors: Trudeau
authors: Suzanne
authors: S
authors: Paradis
authors: Abou-Rachid
authors: AR
authors: Hakima
authors: Zetian
authors: Z
authors: Mi