Pt2+-Exchanged ZIF-8 nanocube as a solid-state precursor for L1(0)-PtZn intermetallic nanoparticles embedded in a hollow carbon nanocage
- Authors
- Kwon, Taehyun; Lim, Sunghyun; Jun, Minki; Kang, Minjung; Joo, Jinwhan; Oh, Aram; Baik, Hionsuck; Hong, Chang Seop; Lee, Kwangyeol
- Issue Date
- 14-1월-2020
- Publisher
- ROYAL SOC CHEMISTRY
- Citation
- NANOSCALE, v.12, no.2, pp.1118 - 1127
- Indexed
- SCIE
SCOPUS
- Journal Title
- NANOSCALE
- Volume
- 12
- Number
- 2
- Start Page
- 1118
- End Page
- 1127
- URI
- https://scholar.korea.ac.kr/handle/2021.sw.korea/58309
- DOI
- 10.1039/c9nr09318d
- ISSN
- 2040-3364
- Abstract
- Nanoparticles with an atomically ordered alloy phase have received enormous attention for application as catalysts in fuel cells because of their unique electronic properties resulting from unusually strong d-orbital interactions between two metal components. However, the synthesis of intermetallic nanoparticles requires a high reaction temperature, thus necessitating the protection of nanoparticles with inorganic layers to prevent aggregation of nanoparticles during synthesis. The protective layer needs to be removed later for application as a catalyst, which is a cumbersome process. Herein, a novel synthetic strategy is reported for the preparation of L1(0)-PtZn intermetallic nanoparticles by utilizing Pt2+-exchanged ZIF-8 nanocubes as a solid-state precursor. The Pt2+-exchanged ZIF-8 phase plays a dual role as a metal ion source for L1(0)-PtZn nanoparticles and as a carbonaceous matrix that restrains the aggregation of nanoparticles during thermal treatment. The L1(0)-PtZn nanoparticles embedded in a hollow carbon nanocage obtained from one-step annealing of Pt2+-exchanged ZIF-8 showed better electrocatalytic activity and durability toward methanol oxidation under acidic electrolyte conditions than those obtained from commercial Pt/C catalysts.
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