期刊
APPLIED CATALYSIS B-ENVIRONMENTAL
卷 312, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.apcatb.2022.121405
关键词
Atomic layer deposition; Confined catalysts; Porous TiO2 nanotubes; Ammonia borane; Hydrolytic dehydrogenation
资金
- National Natural Sci-ence Foundation of China [22102131]
- Natural Science Foundation of Shandong Province [ZR2019BB039]
- Natural Science Basic Research Plan in Shaanxi Province of China [2021JQ-090]
- Fundamental Research Funds for the Central Universities [G2021KY05103]
Synthesizing catalysts with high activity and stability through confinement has been a research hotspot in the field of heterogeneous catalysis. In this study, we report the synthesis of porous TiO2 nanotube confined Pt catalysts through template-assisted atomic layer deposition strategy, which show excellent catalytic performances in the hydrolytic dehydrogenation of NH3BH3.
Synthesizing the catalysts with high activity and stability has always been the research hotspot in the field of heterogeneous catalysis, and the confinement provides a promising route to achieve the goal. Herein we report the porous TiO2 nanotube confined Pt catalysts synthesized by the template-assisted atomic layer deposition (ALD) strategy for hydrolytic dehydrogenation of NH3BH3, in which the ultrafine Pt nanoparticles are decorated on the inner surfaces of the nanotubes with increased Pt-TiO2 interfacial sites compared with the supported Pt/TiO2 counterparts. Combined with the porous structures of the nanotubes with suitable thickness and large open ends, these factors synergistically contribute to the excellent catalytic performances of the confined Pt@TiO2 catalysts. The present strategy can be extended to prepare the corresponding PtNi@TiO2 bicomponent catalysts exhibiting the further boosted activity with a TOF value of 1055.2 mol(H2) mol(Pt)(-1) min(-1). This work offers a reliable and general approach for synthesizing the confined catalysts with high efficiency.
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