Monometallic Pd/Fe3O4 catalyst for denitrification of water

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	Monometallic Pd/Fe3O4 catalyst for denitrification of water
	W. Z. Sun; Q. Li; S. A. Gao; J. K. Shang
	2012
发表期刊	Applied Catalysis B-Environmental
ISSN	0926-3373
卷号	125 页码:41283
摘要	A magnetite supported monometallic Pd catalyst was synthesized by a co-precipitation process followed with the reduction in pure hydrogen at 453 K. The catalyst was composed of ultrafine Pd nanoparticles (similar to 2 nm) highly dispersed on the surface of superparamagnetic Fe3O4 nanoparticles. Aside from its roles as the catalyst support and the magnetic separation medium, Fe3O4 was found to be a good promoter for the nitrate reduction, where nitrate was firstly reduced to nitrite by the Fe(II)/Fe(III) redox couple, and subsequently reduced to nitrogen and ammonium. Further mechanistic studies demonstrated that besides the Pd sites, active sites for the nitrite reduction also exist on the surface of Fe3O4. Part of the nitrite reduction occurred on the surface of Fe3O4, which may also be attributed to the Fe(II)/Fe(III)redox couple. In the present study, ammonium was the main product because of the different denitrification mechanisms compared with bimetallic catalysts. (C) 2012 Elsevier B.V. All rights reserved.
部门归属	[sun, wuzhu; li, qi; gao, shian; shang, jian ku] chinese acad sci, inst met res, shenyang natl lab mat sci, mat ctr water purificat, shenyang 110016, peoples r china. [sun, wuzhu] univ sci & technol china, hefei, peoples r china. [shang, jian ku] univ illinois, dept mat sci & engn, urbana, il 61801 usa.;li, q (reprint author), 72 wenhua rd, shenyang 110016, liaoning provin, peoples r china.;qili@imr.ac.cn
关键词	Pd/fe3o4 Catalytic Denitrification Superparamagnetic Catalyst Fe(Ii)/Fe(Iii) Redox Couple Aqueous Nitrate Solutions Fixed-bed Reactors Nitrite Reduction Active-carbon Selective Hydrogenation Palladium Catalysts Pd-cu Magnetite Nanoparticles Supported Palladium Pd/ceo2 Catalyst
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文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/60247
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	W. Z. Sun,Q. Li,S. A. Gao,et al. Monometallic Pd/Fe3O4 catalyst for denitrification of water[J]. Applied Catalysis B-Environmental,2012,125:41283.
APA	W. Z. Sun,Q. Li,S. A. Gao,&J. K. Shang.(2012).Monometallic Pd/Fe3O4 catalyst for denitrification of water.Applied Catalysis B-Environmental,125,41283.
MLA	W. Z. Sun,et al."Monometallic Pd/Fe3O4 catalyst for denitrification of water".Applied Catalysis B-Environmental 125(2012):41283.