Distinct Crystal-Facet-Dependent Behaviors for Single-Atom Palladium-On-Ceria Catalysts: Enhanced Stabilization and Catalytic Properties
文献类型：期刊论文
| 作者 | Hu, Botao; Sun, Kaian; Zhuang, Zewen; Chen, Zheng; Liu, Shoujie; Cheong, Weng-Chon; Chen, Cheng ; Hu, Mingzhen; Cao, Xing; Ma, Junguo
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| 刊名 | ADVANCED MATERIALS
 |
| 出版日期 | 2022-04 |
| 卷号 | 34期号:16页码:2107721 |
| 关键词 | N-MONOALKYLATION OXYGEN VACANCIES CO OXIDATION SUPPORT AMINES WATER |
| ISSN号 | 0935-9648 |
| 英文摘要 | High-performance, fully atomically dispersed single-atom catalysts (SACs) are promising candidates for next-generation industrial catalysts. However, it remains a great challenge to avoid the aggregation of isolated atoms into nanoparticles during the preparation and application of SACs. Here, the evolution of Pd species is investigated on different crystal facets of CeO2, and vastly different behaviors on the single-atomic dispersion of surface Pd atoms are surprisingly discovered. In situ X-ray photoelectron spectroscopy (XPS), in situ near-ambient-pressure-XPS (NAP-XPS), in situ diffuse reflectance infrared Fourier transform spectroscopy (DRIFTS), and X-ray absorption spectroscopy (XAS) reveal that, in a reducing atmosphere, more oxygen vacancies are generated on the (100) facet of CeO2, and Pd atoms can be trapped and thus feature atomic dispersion; by contrast, on the CeO2 (111) facet, Pd atoms will readily aggregate into clusters (Pd-n). Furthermore, Pd-1/CeO2(100) gives a high selectivity of 90.3% for the catalytic N-alkylation reaction, which is 2.8 times higher than that for Pd-n/CeO2(111). This direct evidence demonstrates the crucial role of crystal-facet effects in the preparation of metal-atom-on-metal-oxide SACs. This work thus opens an avenue for the rational design and targeted synthesis of ultrastable and sinter-resistant SACs. |
| 源URL | [https://ir.rcees.ac.cn/handle/311016/47651]  |
| 专题 | 生态环境研究中心_环境纳米材料实验室 |
| 作者单位 | 1.China Acad Space Technol, Qian Xuesen Lab Space Technol, Beijing 100094, Peoples R China 2.Chem & Chem Engn Guangdong Lab, Shantou 515031, Peoples R China 3.Univ Macau, Fac Sci & Technol, Dept Phys & Chem, Taipa 999078, Macao, Peoples R China 4.Anhui Normal Univ, Coll Chem & Mat Sci, Wuhu 241000, Peoples R China 5.Tsinghua Univ, Dept Chem, Beijing 100084, Peoples R China |
| 推荐引用方式 GB/T 7714 | Hu, Botao,Sun, Kaian,Zhuang, Zewen,et al. Distinct Crystal-Facet-Dependent Behaviors for Single-Atom Palladium-On-Ceria Catalysts: Enhanced Stabilization and Catalytic Properties[J]. ADVANCED MATERIALS,2022,34(16):2107721. |
| APA | Hu, Botao.,Sun, Kaian.,Zhuang, Zewen.,Chen, Zheng.,Liu, Shoujie.,...&Li, Yadong.(2022).Distinct Crystal-Facet-Dependent Behaviors for Single-Atom Palladium-On-Ceria Catalysts: Enhanced Stabilization and Catalytic Properties.ADVANCED MATERIALS,34(16),2107721. |
| MLA | Hu, Botao,et al."Distinct Crystal-Facet-Dependent Behaviors for Single-Atom Palladium-On-Ceria Catalysts: Enhanced Stabilization and Catalytic Properties".ADVANCED MATERIALS 34.16(2022):2107721. |
入库方式： OAI收割
来源：生态环境研究中心
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