In situ atomic-scale studies of thermal stability and surface reconstruction of ZnO nanowires based Pd nanocatalysts
As innovative nanostructured catalysts, palladium nanoparticles supported on carbon-coated zinc oxide nanowires (PdNPs/C&ZnO-NWs) are widely applied in industrial thermal catalysis, and therefore the real-time insights into their thermal stability and microstructural reconstruction at thermal re...
| Main Authors: | , , , , , , |
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| Format: | Article |
| Language: | English |
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Elsevier
2021-11-01
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| Series: | Materials & Design |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S0264127521005013 |
| _version_ | 1818716492382863360 |
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| author | Zhehan Ying Jiangyong Diao Shi Wang Xiangbin Cai Yuan Cai Hongyang Liu Ning Wang |
| author_facet | Zhehan Ying Jiangyong Diao Shi Wang Xiangbin Cai Yuan Cai Hongyang Liu Ning Wang |
| author_sort | Zhehan Ying |
| collection | DOAJ |
| description | As innovative nanostructured catalysts, palladium nanoparticles supported on carbon-coated zinc oxide nanowires (PdNPs/C&ZnO-NWs) are widely applied in industrial thermal catalysis, and therefore the real-time insights into their thermal stability and microstructural reconstruction at thermal reaction conditions will greatly extend our knowledge of their physicochemical properties and provide valuable guidance for the applications and designs of future nanocatalysts. The in-situ transmission electron microscopy (TEM) studies revealed the high-temperature resistance to PdNPs aggregations with aids of carbon-coated low-dimensional nanostructures C&ZnO-NWs and elucidated ripening dynamics of PdNPs and the surface reconstruction of C&ZnO-NWs. The operando analysis of PdNPs/C&ZnO-NWs was executed in real-time under working-temperature situations. The aggregations of PdNPs were not observed until reaching a high working temperature of 300 °C and carbon-coated layers could functionally prevent PdNPs from sintering even when ZnO-NWs experienced melting at 500 °C. The time-lapsed TEM investigation proved that the ripening dynamics and time-dependent revolution of PdNPs size are in accordance with the Ostwald ripening process. The subsequent atomic-scale observation revealed the surface reconstruction of ZnO-NWs in the form of ZnO encapsulation over PdNPs and carbon-coated layers during the thermal process, which showed the microscopic evidence of potential deactivation of ZnO-NW-based nanocatalysts in thermal reactions. |
| first_indexed | 2024-12-17T19:20:07Z |
| format | Article |
| id | doaj.art-69f66bb076e44b36ac22fb78f426c9b2 |
| institution | Directory Open Access Journal |
| issn | 0264-1275 |
| language | English |
| last_indexed | 2024-12-17T19:20:07Z |
| publishDate | 2021-11-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Materials & Design |
| spelling | doaj.art-69f66bb076e44b36ac22fb78f426c9b22022-12-21T21:35:36ZengElsevierMaterials & Design0264-12752021-11-01209109947In situ atomic-scale studies of thermal stability and surface reconstruction of ZnO nanowires based Pd nanocatalystsZhehan Ying0Jiangyong Diao1Shi Wang2Xiangbin Cai3Yuan Cai4Hongyang Liu5Ning Wang6Department of Physics and Center for Quantum Materials, The Hong Kong University of Science and Technology, Kowloon, Hong Kong, China; William Mong Institute of Nano Science and Technology, The Hong Kong University of Science and Technology, Kowloon, Hong Kong, ChinaShenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, ChinaDepartment of Physics and Center for Quantum Materials, The Hong Kong University of Science and Technology, Kowloon, Hong Kong, China; William Mong Institute of Nano Science and Technology, The Hong Kong University of Science and Technology, Kowloon, Hong Kong, ChinaDepartment of Physics and Center for Quantum Materials, The Hong Kong University of Science and Technology, Kowloon, Hong Kong, China; William Mong Institute of Nano Science and Technology, The Hong Kong University of Science and Technology, Kowloon, Hong Kong, ChinaDepartment of Physics and Center for Quantum Materials, The Hong Kong University of Science and Technology, Kowloon, Hong Kong, ChinaShenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China; Corresponding authors at: Department of Physics and Center for Quantum Materials, The Hong Kong University of Science and Technology, Kowloon, Hong Kong, China (N. Wang).Department of Physics and Center for Quantum Materials, The Hong Kong University of Science and Technology, Kowloon, Hong Kong, China; William Mong Institute of Nano Science and Technology, The Hong Kong University of Science and Technology, Kowloon, Hong Kong, China; Corresponding authors at: Department of Physics and Center for Quantum Materials, The Hong Kong University of Science and Technology, Kowloon, Hong Kong, China (N. Wang).As innovative nanostructured catalysts, palladium nanoparticles supported on carbon-coated zinc oxide nanowires (PdNPs/C&ZnO-NWs) are widely applied in industrial thermal catalysis, and therefore the real-time insights into their thermal stability and microstructural reconstruction at thermal reaction conditions will greatly extend our knowledge of their physicochemical properties and provide valuable guidance for the applications and designs of future nanocatalysts. The in-situ transmission electron microscopy (TEM) studies revealed the high-temperature resistance to PdNPs aggregations with aids of carbon-coated low-dimensional nanostructures C&ZnO-NWs and elucidated ripening dynamics of PdNPs and the surface reconstruction of C&ZnO-NWs. The operando analysis of PdNPs/C&ZnO-NWs was executed in real-time under working-temperature situations. The aggregations of PdNPs were not observed until reaching a high working temperature of 300 °C and carbon-coated layers could functionally prevent PdNPs from sintering even when ZnO-NWs experienced melting at 500 °C. The time-lapsed TEM investigation proved that the ripening dynamics and time-dependent revolution of PdNPs size are in accordance with the Ostwald ripening process. The subsequent atomic-scale observation revealed the surface reconstruction of ZnO-NWs in the form of ZnO encapsulation over PdNPs and carbon-coated layers during the thermal process, which showed the microscopic evidence of potential deactivation of ZnO-NW-based nanocatalysts in thermal reactions.http://www.sciencedirect.com/science/article/pii/S0264127521005013In-situ TEMNanocatalystsRipening dynamicsThermal stabilityEncapsulation behavior |
| spellingShingle | Zhehan Ying Jiangyong Diao Shi Wang Xiangbin Cai Yuan Cai Hongyang Liu Ning Wang In situ atomic-scale studies of thermal stability and surface reconstruction of ZnO nanowires based Pd nanocatalysts Materials & Design In-situ TEM Nanocatalysts Ripening dynamics Thermal stability Encapsulation behavior |
| title | In situ atomic-scale studies of thermal stability and surface reconstruction of ZnO nanowires based Pd nanocatalysts |
| title_full | In situ atomic-scale studies of thermal stability and surface reconstruction of ZnO nanowires based Pd nanocatalysts |
| title_fullStr | In situ atomic-scale studies of thermal stability and surface reconstruction of ZnO nanowires based Pd nanocatalysts |
| title_full_unstemmed | In situ atomic-scale studies of thermal stability and surface reconstruction of ZnO nanowires based Pd nanocatalysts |
| title_short | In situ atomic-scale studies of thermal stability and surface reconstruction of ZnO nanowires based Pd nanocatalysts |
| title_sort | in situ atomic scale studies of thermal stability and surface reconstruction of zno nanowires based pd nanocatalysts |
| topic | In-situ TEM Nanocatalysts Ripening dynamics Thermal stability Encapsulation behavior |
| url | http://www.sciencedirect.com/science/article/pii/S0264127521005013 |
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