Journal
JOURNAL OF CHEMICAL PHYSICS
Volume 152, Issue 21, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/5.0008374
Keywords
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Funding
- National Key Research and Development Program of China [2017YFE0102700]
- National Natural Science Foundation of China [51732007]
- Research Fund of Shandong Jiaotong University [Z201917]
- Doctoral Research Start-Up Fund of Shandong Jiaotong University [BS201902010]
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Nickel-based materials have been used in electrochemical water splitting and as a co-catalyst to effectively improve photocatalytic activity. However, the mechanism of the catalytic effect on hydrogen evolution of NiO and Ni(OH)(2) needs further investigation because of the high risk in self-reduction with photo-induced electrons. In this work, the self-reduction of Ni2+ was confirmed during the photocatalytic H-2 evolution in the CdS/Ni(OH)(2) hybrid materials. Meanwhile, in situ formed metallic Ni plays an important role in the increase in the catalytic activity. Fortunately, only a few photo-induced electrons participate in the reduction of Ni2+ in CdS/Ni(OH)(2) hybrid materials. The existence of metallic Ni would prevent more Ni2+ from self-reduction. The synergistic effect of Ni(OH)(2) and metallic Ni contributes to the improvement of H-2 evolution of CdS nanorods.
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