Abstract
High-entropy oxide perovskites (HEOPs), the incorporation of five or more elements into ABO3, possess great flexibility in the composition and electron structure and thus merit untold scientific and technological potential. However, the conventional synthetic methods at high temperatures tend to obtain the bulk with a low surface area, limited exposed active sites, and result in poor catalytic activity. Herein, we report a metal-tannin coordination assembly strategy to synthesize HEOP nanoparticles (NPs) with a size of 10-30 nm and abundant oxygen vacancies. Interestingly, up to 10 immiscible metal elements could be confined into the single HEOP NPs. Meanwhile, the as-synthesized La(FeCoNiCrMn)3 NPs exhibit better CO oxidation activity than single-metal-oxide perovskites and the conventionally solid-state prepared HEOP catalysts. Moreover, the entropy-stabilized NPs function well in moisture- or SO2-containing reaction conditions. This work opens up new opportunities to design nanostructured high-entropy materials for heterogeneous catalysis.
| Original language | English |
|---|---|
| Pages (from-to) | 1746-1755 |
| Number of pages | 10 |
| Journal | Chemistry of Materials |
| Volume | 34 |
| Issue number | 4 |
| DOIs | |
| State | Published - Feb 22 2022 |
Funding
This work was supported by the National Key R & D Program Plan (2020YFB0606400), the National Natural Science Foundation of China (Grant Nos. 21776174; 22178219), the Inner Mongolia Key R & D Program Plan (2021ZD0042), the Shanghai Rising-Star Program (20QA1405200), and the Shanghai Jiao Tong University Scientific and Technological Innovation Funds (No. 2019QYB06). S.D. (discussion of the results) was supported by U.S. Department of Energy, Office of Science, Basic Energy Sciences, Materials Sciences and Engineering Division.