A Si Photocathode Protected and Activated with a Catalytic Ti and Ni Composite Film for Solar Hydrogen Production in Water

Title
A Si Photocathode Protected and Activated with a Catalytic Ti and Ni Composite Film for Solar Hydrogen Production in Water
Authors
Yi-Hsuan Lai박현서Jenny Z ZhangPeter D MatthewsDominic S WrightErwin Reisner
Keywords
hydrogen evolution; photocatalysis; photosynthesis; silicon; water splitting
Issue Date
2015-03
Publisher
Chemistry : a European journal
Citation
VOL 21, NO 10, 3919-3923
Abstract
An efficient, stable and scalable hybrid photoelectrode for visible-light-driven H2 generation in an aqueous pH 9.2 electrolyte solution is reported. The photocathode consists of a p-type Si substrate layered with a Ti and Ni-containing composite film, which acts as both a protection and electrocatalyst layer on the Si substrate. The film is prepared by the simple drop casting of the molecular single-source precursor, [{Ti2(OEt)9(NiCl)}2] (TiNipre), onto the p-Si surface at room temperature, followed by cathodic in situ activation to form the catalytically active TiNi film (TiNicat). The p-Si; TiNicat photocathode exhibits prolonged hydrogen generation with a stable photocurrent of approximately −5 mA cm−2 at 0 V vs. RHE in an aqueous pH 9.2 borate solution for several hours, and serves as a benchmark non-noble photocathode for solar H2 evolution that operates efficiently under neutral–alkaline conditions.
URI
http://pubs.kist.re.kr/handle/201004/50092
ISSN
09476539
Appears in Collections:
KIST Publication > Article
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