Designing Multielement nanointerfaces in supported catalysts by ultra small lattice mismatch

Zhenteng Sheng, Shuai Lyu, Xinyue Liu, Yuhua Zhang, Jinlin Li, Junjiang Zhu, Sónia A. C. Carabineiro

Research output: Contribution to journalArticlepeer-review

Abstract

Catalysts supported by multiple functional constituents show exceptional catalytic performance, attributed to electron and energy exchanges occurring at the nanointerfaces between different subunits. Herein, the lattice-mismatch mechanism was used to guide the creation of a functional interface between cobalt oxide (CoO) and zinc oxide (ZnO) on a graphene (GN) support. By computing the lattice-mismatch between hexagonal wurtzite CoO (h-CoO) and ZnO, we achieve an exceptionally low value of 0.18 %. This ultra small lattice-mismatch facilitates the formation of interfaces when employing a seed-mediated growth approach, using a colloidal method for catalyst design. In this approach, CoO is expected to grow directly on ZnO particles, rather than on GN, when utilizing the ZnO/GN catalyst as heteroseed. The growth pattern of CoO follows the Frank − van der Merwe (FM) model, leading to the successful preparation of ZnO@CoO/GN. Similarly, ZnO readily interfaces with the CoO surface to form a nanointerface when the ZnO@CoO/GN catalyst is used as the seed. Interestingly, this epitaxial growth process can be repeated multiple times, resulting in increasingly diverse nano-heterostructures. The resulting catalyst exhibits outstanding performance in CO2 hydrogenation reaction due to the presence of dense CoO-ZnO nanointerfaces. The methodology presents a novel concept for the advancement of efficient supported catalysts.
Original languageEnglish
Article number158918
Number of pages7
JournalApplied Surface Science
Volume646
DOIs
Publication statusPublished - 15 Feb 2024

Keywords

  • CO hydrogenation
  • Hexagonal wurtzite CoO
  • Lattice-Mismatch
  • Multielement Nanointerface
  • Supported Catalyst

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