Document Type

Article

Language

eng

Publication Date

12-2015

Publisher

Nature Publishing Group (Macmillan Publishers Limited)

Source Publication

Scientific Reports

Source ISSN

2045-2322

Original Item ID

doi: 10.1038/srep18505

Abstract

Ni(OH)2 have emerged as important functional materials for solar fuel conversion because of their potential as cost-effective bifunctional catalysts for both hydrogen and oxygen evolution reactions. However, their roles as photocatalysts in the photoinduced charge separation (CS) reactions remain unexplored. In this paper, we investigate the CS dynamics of a newly designed hybrid catalyst by integrating a Ru complex with Ni(OH)2 nanoparticles (NPs). Using time resolved X-ray absorption spectroscopy (XTA), we directly observed the formation of the reduced Ni metal site (~60 ps), unambiguously demonstrating CS process in the hybrid through ultrafast electron transfer from Ru complex to Ni(OH)2 NPs. Compared to the ultrafast CS process, the charge recombination in the hybrid is ultraslow (≫50 ns). These results not only suggest the possibility of developing Ni(OH)2 as solar fuel catalysts, but also represent the first time direct observation of efficient CS in a hybrid catalyst using XTA.

Comments

Published version. Scientific Reports, Vol. 5, No. 18505 (December 2015). DOI.

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This work is licensed under a Creative Commons Attribution 4.0 License.

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