Structural and catalytic properties of supported Ni-Ir alloy catalysts for H-2 generation via hydrous hydrazine decomposition

	Structural and catalytic properties of supported Ni-Ir alloy catalysts for H-2 generation via hydrous hydrazine decomposition
	He, Lei 1,2; Huang, Yanqiang 1; Liu, Xiao Yan 1; Li, Lin 1; Wang, Aiqin 1; Wang, Xiaodong 1; Mou, Chung-Yuan 3; Zhang, Tao 1
刊名	applied catalysis b-environmental
	2014-04-05
卷号	147 页码:779-788
关键词	Nickel-iridium alloy Hydrazine Hydrogen storage EXAFS Microcalorimeter
英文摘要	iridium modified ni/al2o3 catalysts were prepared using ni-al hydrotalcite as precursor and tested in the selective decomposition of hydrous hydrazine for h-2 generation. compared to ni/al2o3, niir/al2o3 catalysts exhibited an increase of the reaction rate up to 6-fold and the h-2 selectivity from 93% to above 99%. the xrd and exafs analysis confirmed that ir and ni were present in the form of ni-ir alloy; and the h-2 differential heat of adsorption is appreciably lowered with increasing the amount of ir in ni-ir alloy. high-temperature reduction, e.g. 700 degrees c, induced the migration of ir atoms into the ni bulk and produced a ni-skin surface. this structural modification is associated with a strongly decrease of activity and selectivity. exafs measurements were also performed on different noble metals (nm, ir, pt, and au) modified ni/al2o3 catalysts in order to verify the extent of nm-ni bimetallic bond formation, which was found to correlate with the catalytic performance. (c) 2013 elsevier b.v. all rights reserved.
WOS标题词	science & technology ; physical sciences ; technology
类目[WOS]	chemistry, physical ; engineering, environmental ; engineering, chemical
研究领域[WOS]	chemistry ; engineering
关键词[WOS]	highly efficient catalyst ; bimetallic catalysts ; room-temperature ; surface alloys ; 1st principles ; storage ; nanoparticles ; segregation ; reactivity ; clusters
收录类别	SCI
语种	英语
WOS记录号	WOS:000330489400084
公开日期	2016-05-09
内容类型	期刊论文
源URL	[http://cas-ir.dicp.ac.cn/handle/321008/145541]
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
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 100049, Peoples R China 3.Natl Taiwan Univ, Dept Chem, Taipei 10617, Taiwan
推荐引用方式 GB/T 7714	He, Lei,Huang, Yanqiang,Liu, Xiao Yan,et al. Structural and catalytic properties of supported Ni-Ir alloy catalysts for H-2 generation via hydrous hydrazine decomposition[J]. applied catalysis b-environmental,2014,147:779-788.
APA	He, Lei.,Huang, Yanqiang.,Liu, Xiao Yan.,Li, Lin.,Wang, Aiqin.,...&Zhang, Tao.(2014).Structural and catalytic properties of supported Ni-Ir alloy catalysts for H-2 generation via hydrous hydrazine decomposition.applied catalysis b-environmental,147,779-788.
MLA	He, Lei,et al."Structural and catalytic properties of supported Ni-Ir alloy catalysts for H-2 generation via hydrous hydrazine decomposition".applied catalysis b-environmental 147(2014):779-788.