Reduction of Nitric Oxide with Hydrogen on Catalysts of Singly Dispersed Bimetallic Sites Pt1Com and Pd1Con
文献类型：期刊论文
| 作者 | Nguyen, Luan1,2; Zhang, Shiran1,2; Wang, Lei3; Li, Yuanyuan4; Yoshida, Hideto5; Patlolla, Anitha4; Takeda, Seiji5; Frenkel, Anatoly I.4; Tao, Franklin (Feng)1,2 |
| 刊名 | ACS CATALYSIS
 |
| 出版日期 | 2016-02-01 |
| 卷号 | 6期号:2页码:840-850 |
| 关键词 | single site catalysis bimetallic AP-XPS EXAFS in-situ and operando |
| ISSN号 | 2155-5435 |
| 通讯作者 | Tao, F (reprint author), Univ Kansas, Dept Chem & Petr Engn, Lawrence, KS 66045 USA. |
| 英文摘要 | The bimetallic catalyst has been one of the main categories of heterogeneous catalysts for chemical production and energy transformation. Isolation of the continuously packed bimetallic sites of a bimetallic catalyst forms singly dispersed bimetallic sites which have distinctly different chemical environment and electronic state and thus exhibit a different catalytic performance. Two types of catalysts consisting of singly dispersed bimetallic sites Pt1Com or Pd1Con (m and n are the average coordination numbers of Co to a Pt or Pd atom) were prepared through a deposition or impregnation with a following controlled calcination and reduction to form Pt1Com or Pd1Con sites. These bimetallic sites are separately anchored on a nonmetallic support. Each site only consists of a few metal atoms. Single dispersions of these isolated bimetallic sites were identified with scanning transmission electron microscopy. Extended X-ray absorption fine structure spectroscopy (EXAFS) revealed the chemical bonding of single atom Pt-1 (or Pd-1) to Co atoms and thus confirmed the formation of bimetallic sites, Pt1Com and Pd1Con. Reduction of NO with H-2 was used as a probing reaction to test the catalytic performance on this type of catalyst. Selectivity in reducing nitric oxide to N-2 on Pt1Com at 150 degrees C is 98%. Pd1Con is active for reduction of NO with a selectivity of 98% at 250 degrees C. In situ studies of surface chemistry with ambient-pressure X-ray photoelectron spectroscopy and coordination environment of Pt and Pd atoms with EXAFS showed that chemical state and coordination environment of Pt1Com and Pd1Con remain during catalysis up to 250 and 300 degrees C, respectively. The correlation of surface chemistries and structures of these catalysts with their corresponding catalytic activities and selectivities suggests a method to develop new bimetallic catalysts and a new type of single site catalysts. |
| WOS标题词 | Science & Technology ; Physical Sciences |
| 类目[WOS] | Chemistry, Physical |
| 研究领域[WOS] | Chemistry |
| 关键词[WOS] | WATER-GAS SHIFT ; SURFACE-CHEMISTRY ; IN-SITU ; ELECTRON-MICROSCOPY ; PALLADIUM OXIDE ; ATOM CATALYSIS ; OXIDATION ; METHANE ; XPS ; CO |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000369774900044 |
| 源URL | [http://ir.ipe.ac.cn/handle/122111/20619]  |
| 专题 | 过程工程研究所_研究所（批量导入） |
| 作者单位 | 1.Univ Kansas, Dept Chem & Petr Engn, Lawrence, KS 66045 USA 2.Univ Kansas, Dept Chem, Lawrence, KS 66045 USA 3.Chinese Acad Sci, Inst Proc Engn, Beijing 100190, Peoples R China 4.Yeshiva Univ, Dept Phys, New York, NY 10016 USA 5.Osaka Univ, Inst Sci & Ind Res, Osaka 5670047, Japan |
| 推荐引用方式 GB/T 7714 | Nguyen, Luan,Zhang, Shiran,Wang, Lei,et al. Reduction of Nitric Oxide with Hydrogen on Catalysts of Singly Dispersed Bimetallic Sites Pt1Com and Pd1Con[J]. ACS CATALYSIS,2016,6(2):840-850. |
| APA | Nguyen, Luan.,Zhang, Shiran.,Wang, Lei.,Li, Yuanyuan.,Yoshida, Hideto.,...&Tao, Franklin .(2016).Reduction of Nitric Oxide with Hydrogen on Catalysts of Singly Dispersed Bimetallic Sites Pt1Com and Pd1Con.ACS CATALYSIS,6(2),840-850. |
| MLA | Nguyen, Luan,et al."Reduction of Nitric Oxide with Hydrogen on Catalysts of Singly Dispersed Bimetallic Sites Pt1Com and Pd1Con".ACS CATALYSIS 6.2(2016):840-850. |
入库方式： OAI收割
来源：过程工程研究所
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