Surface decorated Ni sites for superior photocatalytic hydrogen production

Huang, Wenhuan; Bo, Tingting; Zuo, Shouwei; Wang, Yunzhi; Chen, Jiamin; Ould-Chikh, Samy; Li, Yang; Zhou, Wei; Zhang, Jing; Zhang, Huabin

Surface decorated Ni sites for superior photocatalytic hydrogen production

Abstract

Precise construction of isolated reactive centers on semiconductors with well-controlled configurations affords a great opportunity to investigate the reaction mechanisms in the photocatalytic process and realize the targeted conversion of solar energy to steer the charge kinetics for hydrogen evolution. In the current research, we decorated isolated Ni atoms on the surface of CdS nanowires for efficient photocatalytic hydrogen production. X-ray absorption fine structure investigations clearly demonstrate the atomical dispersion of Ni sites on the surface of CdS nanowires. Experimental investigations reveal that the isolated Ni atoms not only perform well as the real reactive centers but also greatly accelerate the electron transfer via direct Ni–S coordination. Theoretical simulation further documents that the hydrogen adsorption process has also been enhanced over the semi-coordinated Ni centers through electronic coupling at the atomic scale.

Citation

Huang, W., Bo, T., Zuo, S., Wang, Y., Chen, J., Ould-Chikh, S., Li, Y., Zhou, W., Zhang, J., & Zhang, H. (2022). Surface decorated Ni sites for superior photocatalytic hydrogen production. SusMat. Portico. https://doi.org/10.1002/sus2.76

Acknowledgements

This work received financial support from the King Abdullah University of Science and Technology (KAUST), National Natural Science Foundation of China (22001156), and the Youth Talent Promotion Project of the Science and Technology Association of the Universities of Shaanxi Province (20210602).