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Templated synthesis of nickel nanoparticles embedded in a carbon layer within silica capsules.
- Source :
- Dalton Transactions: An International Journal of Inorganic Chemistry; 2/28/2020, Vol. 49 Issue 8, p2570-2577, 8p
- Publication Year :
- 2020
-
Abstract
- The encapsulation of small non-noble metal nanoparticles (NPs) within an inorganic layer has received considerable attention owing to their enhanced stability and high catalytic activity. Using a combination of emulsion-free polymerization, inner RF-Ni<superscript>2+</superscript> and outer SiO<subscript>2</subscript> coating, and subsequent carbonization treatment, herein, we have fabricated worm-like structured Ni-based composites in which a high density of nickel NPs are embedded in a carbon layer and also entrapped by SiO<subscript>2</subscript> nanocages. We find that the carbonization temperature plays a vital role in adjusting the size of the Ni NPs. A detailed examination of the encapsulated nickel particles synthesized at 700 °C exhibited the best performance on the catalysis of the reduction of 4-NPs. Moreover, owing to the good alloying ability of the Ni NPs with noble metal NPs, the Ni–Pd alloy NPs are also entrapped in the SiO<subscript>2</subscript> nanocages, which exhibit better performance on the catalysis than the Ni-based composites. The encapsulation of Ni–Pd alloys within SiO<subscript>2</subscript> nanocages also improves stability against agglomeration and metal separation during catalytic operation. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 14779226
- Volume :
- 49
- Issue :
- 8
- Database :
- Complementary Index
- Journal :
- Dalton Transactions: An International Journal of Inorganic Chemistry
- Publication Type :
- Academic Journal
- Accession number :
- 141917583
- Full Text :
- https://doi.org/10.1039/c9dt04789a