Tailoring Metal–Oxide Interfaces via Selectively CeO<sub>2</sub>-Decorated Pd Nanocatalysts with Enhanced Catalytic Performance
Metal–oxide interfaces play a prominent role in heterogeneous catalysis. Tailoring the metal–oxide interfaces effectively enhance the catalytic activities and thermal stability of noble metal catalysts. In this work, polyvinyl alcohol-protected reduction and L-arginine induction methods are adopted...
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MDPI AG
2025-01-01
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| Series: | Nanomaterials |
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| author | Ziwen Liu Guizhen Zhang Lijuan Niu Zaicheng Sun Zhenguo Li Hong He |
| author_facet | Ziwen Liu Guizhen Zhang Lijuan Niu Zaicheng Sun Zhenguo Li Hong He |
| author_sort | Ziwen Liu |
| collection | DOAJ |
| description | Metal–oxide interfaces play a prominent role in heterogeneous catalysis. Tailoring the metal–oxide interfaces effectively enhance the catalytic activities and thermal stability of noble metal catalysts. In this work, polyvinyl alcohol-protected reduction and L-arginine induction methods are adopted to prepare Pd catalysts (Pd/Al<sub>2</sub>O<sub>3</sub>-xCeO<sub>2</sub>) that are selectively decorated by CeO<sub>2</sub>, which form core–shell-like structures and generate more Pd-CeO<sub>2</sub> interfacial sites, so that the three-way catalytic activity of Pd/Al<sub>2</sub>O<sub>3</sub>-xCeO<sub>2</sub> catalysts is obviously significantly enhanced due to more adsorption oxygen at the interface of Pd-CeO<sub>2</sub> and good low-temperature reducibility. At the moment, the Pd/Al<sub>2</sub>O<sub>3</sub>-xCeO<sub>2</sub> catalysts exhibit excellent thermal stability after being calcined at 900 °C for 5 h, owing to the Pd species being highly redispersed on CeO<sub>2</sub> and part of the Pd species being incorporated into the lattice of CeO<sub>2</sub>. This is a major reason for the Pd/Al<sub>2</sub>O<sub>3</sub>-xCeO<sub>2</sub> catalysts to maintain high catalytic activity after aging at high temperatures. It is concluded that the metal–oxide interfaces and the interaction between Pd NPs and CeO<sub>2</sub> are responsible for the excellent catalytic performance and stability of Pd/Al<sub>2</sub>O<sub>3</sub>-xCeO<sub>2</sub> catalysts in three-way reactions. |
| format | Article |
| id | doaj-art-c0d5b49d35104006adcc58dfc79989b1 |
| institution | DOAJ |
| issn | 2079-4991 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | MDPI AG |
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| series | Nanomaterials |
| spelling | doaj-art-c0d5b49d35104006adcc58dfc79989b12025-08-20T02:48:07ZengMDPI AGNanomaterials2079-49912025-01-0115319710.3390/nano15030197Tailoring Metal–Oxide Interfaces via Selectively CeO<sub>2</sub>-Decorated Pd Nanocatalysts with Enhanced Catalytic PerformanceZiwen Liu0Guizhen Zhang1Lijuan Niu2Zaicheng Sun3Zhenguo Li4Hong He5Beijing Key Laboratory for Green Catalysis and Separation, College of Materials Science & Engineering, Beijing University of Technology, Beijing 100124, ChinaBeijing Key Laboratory for Green Catalysis and Separation, College of Materials Science & Engineering, Beijing University of Technology, Beijing 100124, ChinaCarbon Energy Technology Co., Ltd., Beijing 102400, ChinaCenter of Excellence for Environmental Safety and Biological Effects, Beijing Key Laboratory for Green Catalysis and Separation, Department of Chemistry, College of Chemistry and Life Science, Beijing University of Technology, Beijing 100124, ChinaChina Automotive Technology and Research Center Co., Ltd., Tianjin 300300, ChinaBeijing Key Laboratory for Green Catalysis and Separation, College of Materials Science & Engineering, Beijing University of Technology, Beijing 100124, ChinaMetal–oxide interfaces play a prominent role in heterogeneous catalysis. Tailoring the metal–oxide interfaces effectively enhance the catalytic activities and thermal stability of noble metal catalysts. In this work, polyvinyl alcohol-protected reduction and L-arginine induction methods are adopted to prepare Pd catalysts (Pd/Al<sub>2</sub>O<sub>3</sub>-xCeO<sub>2</sub>) that are selectively decorated by CeO<sub>2</sub>, which form core–shell-like structures and generate more Pd-CeO<sub>2</sub> interfacial sites, so that the three-way catalytic activity of Pd/Al<sub>2</sub>O<sub>3</sub>-xCeO<sub>2</sub> catalysts is obviously significantly enhanced due to more adsorption oxygen at the interface of Pd-CeO<sub>2</sub> and good low-temperature reducibility. At the moment, the Pd/Al<sub>2</sub>O<sub>3</sub>-xCeO<sub>2</sub> catalysts exhibit excellent thermal stability after being calcined at 900 °C for 5 h, owing to the Pd species being highly redispersed on CeO<sub>2</sub> and part of the Pd species being incorporated into the lattice of CeO<sub>2</sub>. This is a major reason for the Pd/Al<sub>2</sub>O<sub>3</sub>-xCeO<sub>2</sub> catalysts to maintain high catalytic activity after aging at high temperatures. It is concluded that the metal–oxide interfaces and the interaction between Pd NPs and CeO<sub>2</sub> are responsible for the excellent catalytic performance and stability of Pd/Al<sub>2</sub>O<sub>3</sub>-xCeO<sub>2</sub> catalysts in three-way reactions.https://www.mdpi.com/2079-4991/15/3/197metal–oxide interfaceselectively coatingthermal stabilitythree-way catalytic activity |
| spellingShingle | Ziwen Liu Guizhen Zhang Lijuan Niu Zaicheng Sun Zhenguo Li Hong He Tailoring Metal–Oxide Interfaces via Selectively CeO<sub>2</sub>-Decorated Pd Nanocatalysts with Enhanced Catalytic Performance Nanomaterials metal–oxide interface selectively coating thermal stability three-way catalytic activity |
| title | Tailoring Metal–Oxide Interfaces via Selectively CeO<sub>2</sub>-Decorated Pd Nanocatalysts with Enhanced Catalytic Performance |
| title_full | Tailoring Metal–Oxide Interfaces via Selectively CeO<sub>2</sub>-Decorated Pd Nanocatalysts with Enhanced Catalytic Performance |
| title_fullStr | Tailoring Metal–Oxide Interfaces via Selectively CeO<sub>2</sub>-Decorated Pd Nanocatalysts with Enhanced Catalytic Performance |
| title_full_unstemmed | Tailoring Metal–Oxide Interfaces via Selectively CeO<sub>2</sub>-Decorated Pd Nanocatalysts with Enhanced Catalytic Performance |
| title_short | Tailoring Metal–Oxide Interfaces via Selectively CeO<sub>2</sub>-Decorated Pd Nanocatalysts with Enhanced Catalytic Performance |
| title_sort | tailoring metal oxide interfaces via selectively ceo sub 2 sub decorated pd nanocatalysts with enhanced catalytic performance |
| topic | metal–oxide interface selectively coating thermal stability three-way catalytic activity |
| url | https://www.mdpi.com/2079-4991/15/3/197 |
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