期刊
NANO ENERGY
卷 38, 期 -, 页码 118-126出版社
ELSEVIER
DOI: 10.1016/j.nanoen.2017.05.025
关键词
Nanosheet-constructed yolk-shell TiO2; Alkali modification; Pt nanoclusters; Pt-0 and Pt2+; Photocatalytic H-2 production
类别
资金
- Department of Chemistry, University of Cambridge
- Royal Academy of Engineering
- EPSRC
- National Key Research and Development Program of China [2016YFA0202602]
- Program for Changjiang Scholars and Innovative Research Team in University [IRT_15R52]
- International Science & Technology Cooperation Program of China [2015DFE52870]
- National Natural Science Foundation of China [51302204, 51502225]
- Fundamental Research Funds for the Central Universities [WUT: 2016III029]
We demonstrate an alkali modification process to produce highly dispersed ultrafine Pt nanoclusters with metallic Pt-0 and oxidized Pt2+ species as co-catalyst anchored on nanosheet-constructed yolk-shell TiO2 (NYTiO2-Pt) acting as light harvesting reactor for highly efficient photocatalytic H-2 production. Benefiting from the high surface area, highly dispersed ultrafine Pt nanoclusters (similar to 0.6 nm) with Pt-0 and Pt2+ species and special nanosheet-constructed yolk-shell structure, this novel light harvesting reactor exhibits excellent performance for photocatalytic H-2 production. The NYTiO2-Pt-0.5 (0.188 wt% Pt) demonstrates an unprecedentedly high H-2 evolution rate of 20.88 mmol h(-1) g(-1) with excellent photocatalytic stability, which is 87 times than that of NYTiO2-Pt-3.0 (0.24 mmol h(-1) g(-1), 1.88 wt% Pt), and also much higher than those of other TiO2 nanostructures with the same Pt content. Such H-2 evolution rate is the highest reported for photocatalytic H-2 production with such a low Pt content under simulated solar light. Our strategy here suggests that via alkali modifying the photocatalysts, we can not only enhance the H-2 production for solar energy conversion but also significantly decrease the noble metal content for cost saving.
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