Pt2+-Exchanged ZIF-8 nanocube as a solid-state precursor for L10-PtZn intermetallic nanoparticles embedded in a hollow carbon nanocage

Taehyun Kwon, Sunghyun Lim, Minki Jun, Minjung Kang, Jinwhan Joo, Aram Oh, Hionsuck Baik, Chang Seop Hong, Kwangyeol Lee

Research output: Contribution to journalArticlepeer-review

10 Citations (Scopus)


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 L10-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 L10-PtZn nanoparticles and as a carbonaceous matrix that restrains the aggregation of nanoparticles during thermal treatment. The L10-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.

Original languageEnglish
Pages (from-to)1118-1127
Number of pages10
Issue number2
Publication statusPublished - 2020 Jan 14

Bibliographical note

Funding Information:
This work was supported by the National Research Foundation of Korea (Grant No. NRF-2019R1A6A1A11044070 and NRF-2017R1A2B3005682) and the KBSI under the R&D program (Project No. C38530) supervised by the Ministry of Science. Experiments at PLS-II were supported in part by the MSICT and the POSTECH. The authors also thank KBSI for usage of their HRTEM and SEM instruments.

Publisher Copyright:
© 2019 The Royal Society of Chemistry.

ASJC Scopus subject areas

  • Materials Science(all)


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