Entropy-stabilized single-atom Pd catalysts via high-entropy fluorite oxide supports
| Autor: | Yaoqiang Chen, Hao Chen, Chi-Linh Do-Thanh, Qinjing Lin, Zihao Zhang, Jianli Wang, Yun Wang, Yi Jiao, Shuhao Xu, Sheng Dai, Haidi Xu, Jixing Liu |
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| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
0301 basic medicine
Materials science Catalyst synthesis Science Oxide General Physics and Astronomy 02 engineering and technology Heterogeneous catalysis Fluorite Article General Biochemistry Genetics and Molecular Biology Hydrothermal circulation Catalysis law.invention Metal 03 medical and health sciences chemistry.chemical_compound Chemical engineering law Atom Calcination lcsh:Science Multidisciplinary General Chemistry 021001 nanoscience & nanotechnology 030104 developmental biology chemistry visual_art visual_art.visual_art_medium lcsh:Q 0210 nano-technology |
| Zdroj: | Nature Communications, Vol 11, Iss 1, Pp 1-9 (2020) Nature Communications |
| ISSN: | 2041-1723 |
| Popis: | Single-atom catalysts (SACs) have attracted considerable attention in the catalysis community. However, fabricating intrinsically stable SACs on traditional supports (N-doped carbon, metal oxides, etc.) remains a formidable challenge, especially under high-temperature conditions. Here, we report a novel entropy-driven strategy to stabilize Pd single-atom on the high-entropy fluorite oxides (CeZrHfTiLa)Ox (HEFO) as the support by a combination of mechanical milling with calcination at 900 °C. Characterization results reveal that single Pd atoms are incorporated into HEFO (Pd1@HEFO) sublattice by forming stable Pd–O–M bonds (M = Ce/Zr/La). Compared to the traditional support stabilized catalysts such as Pd@CeO2, Pd1@HEFO affords the improved reducibility of lattice oxygen and the existence of stable Pd–O–M species, thus exhibiting not only higher low-temperature CO oxidation activity but also outstanding resistance to thermal and hydrothermal degradation. This work therefore exemplifies the superiority of high-entropy materials for the preparation of SACs. Fabricating intrinsically stable single-atom catalysts (SACs) on traditional supports remains a formidable challenge in catalysis. Here, the authors propose a new strategy to construct a sintering-resistant Pd SAC on a novel equimolar high-entropy fluorite oxide. |
| Databáze: | OpenAIRE |
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