In:
New Journal of Chemistry, Royal Society of Chemistry (RSC), Vol. 46, No. 35 ( 2022), p. 16959-16969
Abstract:
Bimetallic core–shell nano-structured catalysis has sparked great interest due to the multiple possibilities relating to morphology, atomic arrangement, and composition. In the present study, three bimetallic core–shell-based nanocatalysts, viz. Pd(0)@enSiO 2 –TiO 2 –Ni, Pd(0)@enSiO 2 –Ni–TiO 2 , and Pd(0)@Ni–enSiO 2 –TiO 2 , were synthesized via an economical and facile method using Pd(0) and amine-functionalized silica–titania Ni( ii ) in the shell and core, respectively. The arrangement of Ni( ii ) was varied in the three nanocatalysts and their catalytic activities were studied for hydrogenation reactions. The best results were obtained in the case of Pd(0)@enSiO 2 –Ni–TiO 2 among all the catalysts. The enhanced catalytic activity of Pd(0)@enSiO 2 –Ni–TiO 2 was demonstrated via surface characterization techniques. Brunauer–Emmett–Teller (BET) analysis depicted the highest surface area in the case of Pd(0)@enSiO 2 –Ni–TiO 2 ; X-ray photoelectron spectroscopy (XPS) analysis supported the results, as an additional peak from Ni( iii ) was observed in the spectrum of the reused catalyst, which suggested the presence of electronic interactions between Ni( ii ) in the core and Pd(0) in the shell. Moreover, Pd(0)@enSiO 2 –Ni–TiO 2 was found to be highly active for carrying out hydrogenation reactions under mild reaction conditions with good yields and high selectivity, and it can be reused for up to five runs.
Type of Medium:
Online Resource
ISSN:
1144-0546
,
1369-9261
Language:
English
Publisher:
Royal Society of Chemistry (RSC)
Publication Date:
2022
detail.hit.zdb_id:
1472933-7
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