| Chloroform Hydrodechlorination over Palladium-Gold Catalysts: A First-Principles DFT Study | |
| Xu, Lang1; Yao, Xiaoqian2; Khan, Ahmad1; Mavrikakis, Manos1 | |
| 2016-05-09 | |
| 发表期刊 | CHEMCATCHEM
 |
| ISSN | 1867-3880 |
| 卷号 | 8期号:9页码:1739-1746 |
| 摘要 | Hydrodechlorination is a promising method for treating toxic chlorocarbon compounds. Pd is among the most effective catalysts for chloroform hydrodechlorination, and experiments have shown that the Pd-Au alloy catalyst yields superior catalytic performance over pure Pd. Here we examine the chloroform hydrodechlorination mechanism over Pd(111) and Pd-ML/Au(111) surfaces using periodic, self-consistent density functional theory calculations (DFT, GGA-PW91) and maximum rate analysis. We suggest that the reaction occurs on both surfaces through complete dechlorination of chloroform followed by hydrogenation of CH* to methane, and that the initial dechlorination step is likely the rate-limiting step. On Pd(111), the chloroform dechlorination barrier is 0.24 eV higher than the desorption barrier, whereas on Pd-ML/Au(111), the chloroform dechlorination barrier is 0.07 eV lower than the desorption barrier, which can explain the higher hydrodechlorination activity of the Pd-Au alloy catalyst. |
| 关键词 | Alloys Carbon Chlorine Density Functional Calculations Hydrogenation |
| 文章类型 | Article |
| WOS标题词 | Science & Technology ; Physical Sciences |
| DOI | 10.1002/cctc.201600144 |
| 收录类别 | SCI |
| 语种 | 英语 |
| 关键词[WOS] | VOLATILE ORGANIC-COMPOUNDS ; TOTAL-ENERGY CALCULATIONS ; WAVE BASIS-SET ; OXIDATION ; PD ; NANOPARTICLES ; HYDROCARBONS ; HYDRODEHALOGENATION ; TRICHLOROETHYLENE ; DECHLORINATION |
| WOS研究方向 | Chemistry |
| WOS类目 | Chemistry, Physical |
| 项目资助者 | U.S. Department of Energy (DOE)-Basic Energy Sciences (BES), Office of Chemical Sciences(DE-FG02-05ER15731) ; National Natural Science Foundation of China(21276255) ; K. C. Wong Education Foundation ; Department of Energy's Office of Biological and Environmental Research located at PNNL ; U.S. Department of Energy, Office of Science(DE-AC02-06CH11357 ; DE-AC02-05CH11231) |
| WOS记录号 | WOS:000379528500020 |
| 引用统计 | |
| 文献类型 | 期刊论文 |
| 条目标识符 | http://ir.ipe.ac.cn/handle/122111/21241 |
| 专题 | 多相复杂系统国家重点实验室 |
| 作者单位 | 1.Univ Wisconsin, Dept Chem & Biol Engn, Madison, WI 53706 USA 2.Chinese Acad Sci, Inst Proc Engn, State Key Lab Multiphase Complex Syst, Beijing Key Lab Ion Liquids Clean Proc, Beijing 100190, Peoples R China |
| 推荐引用方式 GB/T 7714 | Xu, Lang,Yao, Xiaoqian,Khan, Ahmad,et al. Chloroform Hydrodechlorination over Palladium-Gold Catalysts: A First-Principles DFT Study[J]. CHEMCATCHEM,2016,8(9):1739-1746. |
| APA | Xu, Lang,Yao, Xiaoqian,Khan, Ahmad,&Mavrikakis, Manos.(2016).Chloroform Hydrodechlorination over Palladium-Gold Catalysts: A First-Principles DFT Study.CHEMCATCHEM,8(9),1739-1746. |
| MLA | Xu, Lang,et al."Chloroform Hydrodechlorination over Palladium-Gold Catalysts: A First-Principles DFT Study".CHEMCATCHEM 8.9(2016):1739-1746. |
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| 文件名称/大小 | 文献类型 | 版本类型 | 开放类型 | 使用许可 | ||
| Chloroform Hydrodech（1428KB） | 期刊论文 | 出版稿 | 开放获取 | CC BY-NC-SA | 浏览 请求全文 | |
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