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Surface modification of Ni/Al2O3 with Pt: Highly efficient catalysts for H-2 generation via selective decomposition of hydrous hydrazine
He, Lei1,2; Huang, Yanqiang1; Wang, Aiqin1; Liu, Yu1; Liu, Xiaoyan1; Chen, Xiaowei3; Jose Delgado, Juan3; Wang, Xiaodong1; Zhang, Tao1
关键词Hydrous Hydrazine Hydrogen Storage Pt-ni Alloy Exafs Tpd
刊名JOURNAL OF CATALYSIS
2013-02-01
DOI10.1016/j.jcat.2012.10.012
298页:1-9
收录类别SCI
文章类型Article
WOS标题词Science & Technology ; Physical Sciences ; Technology
类目[WOS]Chemistry, Physical ; Engineering, Chemical
研究领域[WOS]Chemistry ; Engineering
关键词[WOS]BIMETALLIC CATALYSTS ; ROOM-TEMPERATURE ; STORAGE ; NI ; ADSORPTION ; NICKEL ; DEHYDROGENATION ; HYDROGENATION ; METHANE ; ALLOYS
英文摘要Hydrous hydrazine, such as hydrazine monohydrate (N2H4 center dot H2O), is a promising hydrogen carrier material due to its high content of hydrogen (8.0 wt%). The decomposition of hydrous hydrazine to H-2 with a high selectivity and a high activity under mild conditions is the key to its potential usage as a hydrogen carrier material. Platinum-modified Ni/Al2O3 catalysts (NiPtx/Al2O3) were prepared starting from Ni-Al hydrotalcite and tested in the decomposition of hydrous hydrazine. Compared with Ni/Al2O3, the TOF was enhanced sevenfold over NiPt0.057/Al2O3; meanwhile, the selectivity to H-2 was increased to 98%. Characterization results by means of HAADF-STEM, XRD, and EXAFS revealed the presence of surface Pt-Ni alloy in this Pt-promoted catalyst. The formation of Pt-Ni alloy could significantly weaken the interaction between adspecies produced (including H-2 and NHx) and surface Ni atoms, which is confirmed by microcalorimetry and TPD results. The weakening effect could account for the greatly enhanced reaction rate, as well as H-2 selectivity on NiPtx/Al2O3 catalysts. (c) 2012 Elsevier Inc. All rights reserved.
语种英语
WOS记录号WOS:000316155700001
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被引频次:86[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://cas-ir.dicp.ac.cn/handle/321008/137746
专题中国科学院大连化学物理研究所
作者单位1.Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Catalysis, Dalian 116023, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100039, Peoples R China
3.Univ Cadiz, Fac Ciencias, Dept Ciencia Mat & Ingn Met & Quim Inorgan, Cadiz, Spain
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He, Lei,Huang, Yanqiang,Wang, Aiqin,et al. Surface modification of Ni/Al2O3 with Pt: Highly efficient catalysts for H-2 generation via selective decomposition of hydrous hydrazine[J]. JOURNAL OF CATALYSIS,2013,298:1-9.
APA He, Lei.,Huang, Yanqiang.,Wang, Aiqin.,Liu, Yu.,Liu, Xiaoyan.,...&Zhang, Tao.(2013).Surface modification of Ni/Al2O3 with Pt: Highly efficient catalysts for H-2 generation via selective decomposition of hydrous hydrazine.JOURNAL OF CATALYSIS,298,1-9.
MLA He, Lei,et al."Surface modification of Ni/Al2O3 with Pt: Highly efficient catalysts for H-2 generation via selective decomposition of hydrous hydrazine".JOURNAL OF CATALYSIS 298(2013):1-9.
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