Formic acid as the in-situ hydrogen source for catalytic reduction of nitrate in water by PdAg alloy nanoparticles supported on amine-functionalized SiO2

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	Formic acid as the in-situ hydrogen source for catalytic reduction of nitrate in water by PdAg alloy nanoparticles supported on amine-functionalized SiO2
	Ding, Yajun ; Sun, Wuzhu ; Yang, Weiyi ; Li, Qi
刊名	APPLIED CATALYSIS B-ENVIRONMENTAL
	2017-04-01
卷号	203 页码:372-380
关键词	Catalytic nitrate reduction Formic acid PdAg/SiO2-NH2 catalyst -NH2 surface modification Electron transfer
ISSN号	0926-3373
通讯作者	Li, Q (reprint author), 72 Wenhua Rd, Shenyang 110016, Liaoning Provin, Peoples R China.
中文摘要	Nitrate pollution in water is becoming a severe problem all over the world, and the catalytic reduction of nitrate by reducing agents had been considered as one of the most promising methods because it could convert nitrate to harmless nitrogen gas with a high efficiency. In this work, the PdAg/SiO2-NH2 catalyst was developed by firstly loading Pd onto ---NH2 surface-modified SiO2 catalyst support, followed by a controlled surface reaction to load Ag and create PdAg alloy nanoparticles on SiO2-NH2 catalyst support. For the first time, the PdAg/SiO2-NH2 catalyst was found to be able to effectively reduce nitrate with HCOOH as the reducing agent precursor. Its enhanced nitrate reduction performance could be attributed to the combination effects from the surface -NH2 modification and the better electron transfer from Ag to Pd than from other metals due to their larger difference of work function, both of which were beneficial for the catalytic HCOOH decomposition to provide the in situ sources of the reducing agent of H-2 and buffer of CO2 for the catalytic nitrate reduction process. To optimize the nitrate reduction performance of the PdAg/SiO2-NH2 catalyst, Ag content was carefully modulated and the Pd:Ag molar ratio of 1:0.5 was found to have the most efficient nitrate reduction capability. (C) 2016 Elsevier B.V. All rights reserved.
学科主题	Chemistry, Physical ; Engineering, Environmental ; Engineering, Chemical
收录类别	SCI
资助信息	Basic Science Innovation Program of Shenyang National Laboratory for Materials Science [Y4N56R1161, Y4N56F2161]; National Natural Science Foundation of China [51502305]
语种	英语
公开日期	2017-08-17
内容类型	期刊论文
源URL	[http://ir.imr.ac.cn/handle/321006/78217]
专题	金属研究所_中国科学院金属研究所
推荐引用方式 GB/T 7714	Ding, Yajun,Sun, Wuzhu,Yang, Weiyi,et al. Formic acid as the in-situ hydrogen source for catalytic reduction of nitrate in water by PdAg alloy nanoparticles supported on amine-functionalized SiO2[J]. APPLIED CATALYSIS B-ENVIRONMENTAL,2017,203:372-380.
APA	Ding, Yajun,Sun, Wuzhu,Yang, Weiyi,&Li, Qi.(2017).Formic acid as the in-situ hydrogen source for catalytic reduction of nitrate in water by PdAg alloy nanoparticles supported on amine-functionalized SiO2.APPLIED CATALYSIS B-ENVIRONMENTAL,203,372-380.
MLA	Ding, Yajun,et al."Formic acid as the in-situ hydrogen source for catalytic reduction of nitrate in water by PdAg alloy nanoparticles supported on amine-functionalized SiO2".APPLIED CATALYSIS B-ENVIRONMENTAL 203(2017):372-380.