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题名: Atomically Dispersed Pt on the Surface of Ni Particles: Synthesis and Catalytic Function in Hydrogen Generation from Aqueous Ammonia-Borane
作者: Li, Zhao1, 2;  He, Teng1;  Matsumura, Daiju3;  Miao, Shu1;  Wu, Anan4;  Liu, Lin1;  Wu, Guotao1;  Chen, Ping1, 5
关键词: single-atom alloy ;  Pt-Ni alloy ;  catalytic dehydrogenation ;  hydrogen storage ;  ammonia borane
刊名: ACS CATALYSIS
发表日期: 2017-10-01
DOI: 10.1021/acscatal.7601790
卷: 7, 期:10, 页:6762-6769
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology ;  Physical Sciences
类目[WOS]: Chemistry, Physical
研究领域[WOS]: Chemistry
英文摘要: The development of cost-effective and highly efficient catalysts is of scientific importance and practical need in the conversion and utilization of clean energy. One of the strategies fulfilling that demand is to achieve high exposure of a catalytically functional noble metal to reactants to maximize its utilization efficiency. We report herein that the single-atom alloy (SAA) made of atomically dispersed Pt on the surface of Ni particles (Pt is surrounded by Ni atoms) exhibits improved catalytic activity on the hydrolytic dehydrogenation of ammonia-borane, a promising hydrogen storage method for onboard applications. Specifically, an addition of 160 ppm of Pt leads to ca. 3-fold activity improvement in comparison to that of pristine Ni/CNT catalyst. The turnover frequency based on the isolated Pt is 12000 mol(H2) mol(pt)(-1) min(-1), which is about 21 times the value of the best Pt based catalyst ever reported. Our simulation results indicate that the high activity achieved stems from the synergistic effect between Pt and Ni, where the negatively charged Pt (Pt delta-) and positively charged Ni (Ni delta+) in the Pt-Ni alloy are prone to interact with H and OH of H2O molecules, respectively, leading to an energetically favorable reaction pathway.
关键词[WOS]: SINGLE-ATOM CATALYSTS ;  GAS SHIFT REACTION ;  HYDROLYTIC DEHYDROGENATION ;  SELECTIVE HYDROGENATION ;  HETEROGENEOUS CATALYSTS ;  CHEMICAL HYDRIDES ;  STORAGE MATERIALS ;  ROOM-TEMPERATURE ;  CO OXIDATION ;  FORMIC-ACID
语种: 英语
WOS记录号: WOS:000412795700039
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/150124
Appears in Collections:中国科学院大连化学物理研究所_期刊论文

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作者单位: 1.Chinese Acad Sci, Dalian Inst Chem Phys, Dalian 116023, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
3.Japan Atom Energy Agcy, Mat Sci Res Ctr, 1-1-1 Koto, Sayo, Hyogo 6795148, Japan
4.Xiamen Univ, Coll Chem & Chem Engn, Fujian Prov Key Lab Theoret & Computat Chem, Xiamen 361005, Peoples R China
5.Xiamen Univ, Collaborat Innovat Ctr Chem Energy Mat iChEM 2011, Xiamen 361005, Fujian, Peoples R China

Recommended Citation:
Li, Zhao,He, Teng,Matsumura, Daiju,et al. Atomically Dispersed Pt on the Surface of Ni Particles: Synthesis and Catalytic Function in Hydrogen Generation from Aqueous Ammonia-Borane[J]. ACS CATALYSIS,2017,7(10):6762-6769.
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