open access

https://hdl.handle.net/2115/85993

Targeted removal of interfacial adventitious carbon towards directional charge delivery to isolated metal sites for efficient photocatalytic H-2 production

英語

Photocatalytic H-2 generation

2020-10

Elsevier

Nano Energy

76

105077

Creation of clean interfaces without contamination of adventitious carbon and robust single active sites are highly desirable for delivery and utilization of electrons in sunlight-driven hydrogen production but still remains challenging in part owing to the lack of understanding in junction nature. Herein, we tackle this challenge by targeted removing of interfacial adventitious carbon between photoharvester CdS and novel single-cobalt co-catalyst (Co-NC). It's found that surface-trapped electrons can readily migrate to the closely attached Co-NC across the cleared interface between CdS and Co-NC. The small-resistance interfacial carrier path and the robust single-cobalt sites work in a cooperative way and hence achieve a superior visible-light driven H-2 generation activity with a rate of 4.34 mmol/h, an apparent quantum yield (AQY) of 63.9% at 400 nm and a ultrahigh turnover frequency (TOF) of up to 16714.7 h(-1). Our finding will motivate future work in creating clean interfaces and unique single active sites for high performance photocatalysis.

学術雑誌論文

Accepted Manuscript

Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International

©2020. This manuscript version is made available under the CC-BY-NC-ND 4.0 license https://creativecommons.org/licenses/by-nc-nd/4.0/

2211-2855