Atomically defined Co on two-dimensional TiO2 nanosheet for photocatalytic hydrogen evolution

Xin Wu, Shouwei Zuo, Mei Qiu, Yang Li, Yongfan Zhang, Pengfei An, Jing Zhang, Huabin Zhang, Jian Zhang

Research output: Contribution to journalArticlepeer-review

40 Scopus citations


Precisely constructed dispersion of well-defined single-atom active centers on the semiconductor could allow of the investigation of reaction mechanisms, yet targeted delivery of solar energy to steer the charge kinetics for hydrogen evolution remains challenging. Here we realize the location of isolated Co atoms on the TiO2 nanosheets with the thickness of 6 nm, providing highly active catalytic sites for the significantly boosted photocatalytic hydrogen evolution. X-ray absorption fine structure measurements verify that the atomically dispersed Co is successfully grafted on the surface of TiO2 nanosheets. Experimental exploration and theoretical demonstration not only confirm the isolated Co atoms perform as reactive sites, but also verify that the electron transfer and hydrogen adsorption/desorption processes can be greatly accelerated via the effective Co-O electronic coupling in atomic scale, thereby facilitating the hydrogen evolution.
Original languageEnglish (US)
Pages (from-to)127681
JournalChemical Engineering Journal
StatePublished - Nov 11 2020

Bibliographical note

KAUST Repository Item: Exported on 2021-11-21
Acknowledgements: This work is supported by NSFC (21773242, 21935010), the Strategic Priority Research Program of the Chinese Academy of Sciences (XDB20000000), National Key Research and Development Program of China (2018YFA0208600, 2017YFA0403400) and NSF of Fujian province (2020J05085).

ASJC Scopus subject areas

  • Environmental Chemistry
  • General Chemical Engineering
  • General Chemistry
  • Industrial and Manufacturing Engineering


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