Nature of support plays vital roles in H2O promoted CO oxidation over Pt catalysts
文献类型：期刊论文
| 作者 | Hu, Yutao1,2; Liu, Xiaolong1; Zou, Yang1; Xie, Haijiao4; Zhu, Tingyu1,3 |
| 刊名 | JOURNAL OF CATALYSIS
 |
| 出版日期 | 2022-12-01 |
| 卷号 | 416页码:364-374 |
| ISSN号 | 0021-9517 |
| 关键词 | CO oxidation Platinum Heterogenous catalysis H 2 O promotion Reaction mechanism |
| DOI | 10.1016/j.jcat.2022.11.020 |
| 英文摘要 | Pt nanoparticle catalysts supported on a series of TiO2-SiO2 composites with different molar ratios were prepared, characterized, and their CO oxidation activities were evaluated under dry and humid condi-tions. Among the catalysts, Pt/1Ti-3Si showed the best performance under both conditions and potentials for future industrial applications. H218O experiments were designed and the CO2 composition was calcu-lated to quantify the promotion effect of H2O, which was highly correlated with the concentration of H2O and Ti-Si ratio. The XRD, XPS and BET results revealed that the defects on the supports inhibited phase transformation and lattice growth for anatase TiO2. These defects also led to an increase in the number of acid sites on Pt/TiO2-SiO2. The TEM, EDS mapping, and CO chemosorption results indicated that metal-lic Pt0 particles were formed, which was beneficial for CO oxidation during reaction. It was found that the generation of OH from H2O dissociation and the desorption of OH on TiO2 were much easier than those on SiO2, illustrating that the H2O promotion effect could be controlled by regulating the nature of support. The mechanism of H2O promotion was proposed by experimental and theoretical methods, which con-firmed the carboxyl intermediate pathway rather than the formate pathway.(c) 2022 Elsevier Inc. All rights reserved. |
| WOS关键词 | TOTAL-ENERGY CALCULATIONS ; PT/TIO2 CATALYSTS ; FT-IR ; ADSORPTION ; ANATASE ; WATER ; TEMPERATURE ; DFT ; TRANSFORMATION ; NANOPARTICLES |
| 资助项目 | National Natural Science Foun[51938014] ; National Natural Science Foun[52170118] |
| WOS研究方向 | Chemistry ; Engineering |
| 语种 | 英语 |
| 出版者 | ACADEMIC PRESS INC ELSEVIER SCIENCE |
| WOS记录号 | WOS:000901490900002 |
| 资助机构 | National Natural Science Foun |
| 源URL | [http://ir.ipe.ac.cn/handle/122111/56292]  |
| 专题 | 中国科学院过程工程研究所 |
| 通讯作者 | Liu, Xiaolong; Zhu, Tingyu |
| 作者单位 | 1.Chinese Acad Sci, Inst Proc Engn, Innovat Acad Green Manufacture, CAS Key Lab Green Proc & Engn, Beijing 100190, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 3.Chinese Acad Sci, Inst Urban Environm, Ctr Excellence Reg Atmospher Environm, Xiamen 361021, Peoples R China 4.Hangzhou Yanqu Informat Technol Co Ltd, Hangzhou 310003, Peoples R China |
| 推荐引用方式 GB/T 7714 | Hu, Yutao,Liu, Xiaolong,Zou, Yang,et al. Nature of support plays vital roles in H2O promoted CO oxidation over Pt catalysts[J]. JOURNAL OF CATALYSIS,2022,416:364-374. |
| APA | Hu, Yutao,Liu, Xiaolong,Zou, Yang,Xie, Haijiao,&Zhu, Tingyu.(2022).Nature of support plays vital roles in H2O promoted CO oxidation over Pt catalysts.JOURNAL OF CATALYSIS,416,364-374. |
| MLA | Hu, Yutao,et al."Nature of support plays vital roles in H2O promoted CO oxidation over Pt catalysts".JOURNAL OF CATALYSIS 416(2022):364-374. |
入库方式： OAI收割
来源：过程工程研究所
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