Effects of Alkaline Earth Metal Amides on Ru in Catalytic Ammonia Decomposition
文献类型：期刊论文
| 作者 | Chang, Fei2,3; Wang, Peikun2,3; Chen, Ping1,3,4; Wang, Han2,3; Yu, Pei2,3; Ju, Xiaohua3; Guo, Jianping3; Liu, Lin3 |
| 刊名 | JOURNAL OF PHYSICAL CHEMISTRY C
 |
| 出版日期 | 2016-02-11 |
| 卷号 | 120期号:5页码:2822-2828 |
| ISSN号 | 1932-7447 |
| DOI | 10.1021/acs.jpcc.5b11768 |
| 文献子类 | Article |
| 英文摘要 | The effects of alkaline earth metal amides (Mg(NH2)(2), Ca(NH2)(2), and Ba(NH2)(2)) on Ru in catalyzing NH3 decomposition were investigated. The catalytic activities rank in the order of Ru-Ba(NH2), > Ru-Ca(NH2)(2) > Ru-Mg(NH2)(2), among which Ru-Ba(NH2)(2) and Ru-Ca(NH2)(2) catalysts have higher intrinsic activities (TOF) and lower apparent activation energies than those of Ru-Mg(NH2)(2) and Ru/MgO catalysts, indicating that Ca(NH2)(2) and Ba(NH2)(2) may have different roles from those of Mg(NH2), and MgO. The TPR (temperature-programmed reaction) results show that Ca(NH2)(2) or Ba(NH2)(2) decomposes to N-2 and H-2 rather than NH3 in the presence of Ru. Ru may promote the NHx (x = 1, 2) coupling to H-2 and N-2 and change the decomposition pathways of Ca(NH2)(2) and Ba(NH2)(2). Kinetic analyses reveal that the Ru promoted NHx coupling to H-2 and N-2 may be the rate-determining step for catalytic ammonia decomposition. We suggest that the catalysis is very likely fulfilled via (1) Ru catalyzes the decomposition of amides to form H-2, N-2, and imides through an energy more favorable pathway and (2) imides react with NH3 to regenerate amides. The presence of Ca(NH2)(2) or Ba(NH2)(2) creates a NHx-rich environment, and Ru mediates the electron transfer from NHx to facilitate NHx coupling to N-2 and H-2. |
| WOS关键词 | COX-FREE HYDROGEN ; FUEL-CELL APPLICATIONS ; N-H SYSTEM ; SUPPORTED RUTHENIUM ; STRUCTURE SENSITIVITY ; NH3 DECOMPOSITION ; CARBON NANOTUBES ; TRANSITION-METAL ; GENERATION ; NANOPARTICLES |
| WOS研究方向 | Chemistry ; Science & Technology - Other Topics ; Materials Science |
| 语种 | 英语 |
| WOS记录号 | WOS:000370210400038 |
| 出版者 | AMER CHEMICAL SOC |
| 源URL | [http://cas-ir.dicp.ac.cn/handle/321008/171230]  |
| 专题 | 大连化学物理研究所_中国科学院大连化学物理研究所 |
| 通讯作者 | Chen, Ping; Guo, Jianping |
| 作者单位 | 1.Chinese Acad Sci, Dalian Inst Chem Phys, Collaborat Innovat Ctr Chem Energy Mat, Dalian 116023, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 3.Chinese Acad Sci, Dalian Inst Chem Phys, Dalian 116023, Peoples R China 4.Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Catalysis, Dalian 116023, Peoples R China |
| 推荐引用方式 GB/T 7714 | Chang, Fei,Wang, Peikun,Chen, Ping,et al. Effects of Alkaline Earth Metal Amides on Ru in Catalytic Ammonia Decomposition[J]. JOURNAL OF PHYSICAL CHEMISTRY C,2016,120(5):2822-2828. |
| APA | Chang, Fei.,Wang, Peikun.,Chen, Ping.,Wang, Han.,Yu, Pei.,...&Liu, Lin.(2016).Effects of Alkaline Earth Metal Amides on Ru in Catalytic Ammonia Decomposition.JOURNAL OF PHYSICAL CHEMISTRY C,120(5),2822-2828. |
| MLA | Chang, Fei,et al."Effects of Alkaline Earth Metal Amides on Ru in Catalytic Ammonia Decomposition".JOURNAL OF PHYSICAL CHEMISTRY C 120.5(2016):2822-2828. |
入库方式： OAI收割
来源：大连化学物理研究所
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