Journal
NANO ENERGY
Volume 76, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.nanoen.2020.105077
Keywords
Interface engineering; Cleared interface; Adventitious carbon; Single-atom catalyst; Photocatalytic H-2 generation
Categories
Funding
- World Premier International Research Center Initiative (WPI Initiative) on Materials Nanoarchitectonics (MANA), MEXT (Japan)
- JSPS KAKENHI [JP18H02065]
- Photo-excitonix Project at Hokkaido University, National Natural Science Foundation of China [21633004, 51902121]
- Fundamental Research Funds for the Central Universities [NE2019103, 2018QD011]
- Natural Science Foundation of Hubei Province [2019CFB322]
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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.
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