In:
Angewandte Chemie, Wiley, Vol. 132, No. 28 ( 2020-07-06), p. 11607-11612
Abstract:
Developing highly efficient and low‐cost photocatalysts for overall water splitting has long been a pursuit for converting solar power into clean hydrogen energy. Herein, we demonstrate that a nonstoichiometric nickel–cobalt double hydroxide can achieve overall water splitting by itself upon solar light irradiation, avoiding the consumption of noble‐metal co‐catalysts. We employed an intensive laser to ablate a NiCo alloy target immersed in alkaline solution, and produced so‐called L‐NiCo nanosheets with a nonstoichiometric composition and O 2− /Co 3+ ions exposed on the surface. The nonstoichiometric composition broadens the band gap, while O 2− and Co 3+ ions boost hydrogen and oxygen evolution, respectively. As such, the photocatalyst achieves a H 2 evolution rate of 1.7 μmol h −1 under AM 1.5G sunlight irradiation and an apparent quantum yield (AQE) of 1.38 % at 380 nm.
Type of Medium:
Online Resource
ISSN:
0044-8249
,
1521-3757
DOI:
10.1002/ange.v132.28
DOI:
10.1002/ange.202002650
Language:
English
Publisher:
Wiley
Publication Date:
2020
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505872-7
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1479266-7
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