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Self-reduction derived nickel nanoparticles in CdS/Ni(OH)2 heterostructure for enhanced photocatalytic hydrogen evolution.
Metadata
Journaljournal of chemical physics2.991Date
2020-Jun-07
Type
Journal Article
Volume
2020-Jun-07 / 152 : 214701
Author
Wang X 1, Zhang X 2, Gao W 2, Sang Y 2, Wang Y 1, Liu H 2
Affiliation
  • 2. State Key Laboratory of Crystal Materials, Shandong University, Jinan 250100, China.
Doi
PMIDMESH
Abstract
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 H2 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 H2 evolution of CdS nanorods.
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J Chem Physjournal of chemical physics
Metadata
LocationUnited States
FromAMER INST PHYSICS

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