Insight into the efficient oxidation of methyl-ethyl-ketone over hierarchically micro-mesostructured Pt/K-(Al)SiO2 nanorod catalysts: Structure-activity relationships and mechanism

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	Insight into the efficient oxidation of methyl-ethyl-ketone over hierarchically micro-mesostructured Pt/K-(Al)SiO2 nanorod catalysts: Structure-activity relationships and mechanism
	Dummer, Nicholas F.; Jiang, Zeyu; Taylor, Stuart H.; Ma, Mudi; Shen, Zhenxing; Hao, Zhengping; Ma, Chunyan; Tian, Mingjiao; Shi, Jianwen; He, Chi
刊名	APPLIED CATALYSIS B-ENVIRONMENTAL
	2018-06-15
卷号	226 页码:220-233
关键词	Monodispersed Pt sites Al-K decorated silica Methyl-ethyl-ketone Catalytic oxidation Activation mechanism
ISSN号	0926-3373
文献子类	Article
英文摘要	Hierarchically micro-mesostructured Pt/K-Al-SiO2 catalysts with regular nanorod (Pt/KA-NRS) and spherical nanoflower-like (Pt/KA-SNFS) morphologies were prepared. The existence of Al atoms generates Bronsted acid sites and reduces silanol groups over the supports, promoting the dispersion of Pt nanoparticles and stability of catalysts. Potassium atoms balance the negative charge of supports and enhance O-2 mobility. The Pt/KA-NRS catalysts exhibit unexceptionable low temperature activity, CO2 selectivity, and stability for MEK oxidation. Amongst, 0.27 wt.% Pt/KA-NRS completely converts MEK at just 170 degrees C (activation energy as low as 37.22 kJ.mol(-1)), more than 100 degrees C lower than other typical Pt/Pd supported catalysts reported in the literature. Diacetyl and 2,3-butandiol are the main intermediates during MEK activation, which convert into H2O and CO2 through aldehydes and acids. The excellent catalytic activity of Pt/KA-NRS is ascribed to their regular morphology, high Pt content and dispersion, excellent MEK adsorption capacity and superior O-2/CO2 desorption capability under low temperature.
内容类型	期刊论文
源URL	[http://ir.rcees.ac.cn/handle/311016/41094]
专题	生态环境研究中心_环境纳米材料实验室
推荐引用方式 GB/T 7714	Dummer, Nicholas F.,Jiang, Zeyu,Taylor, Stuart H.,et al. Insight into the efficient oxidation of methyl-ethyl-ketone over hierarchically micro-mesostructured Pt/K-(Al)SiO2 nanorod catalysts: Structure-activity relationships and mechanism[J]. APPLIED CATALYSIS B-ENVIRONMENTAL,2018,226:220-233.
APA	Dummer, Nicholas F..,Jiang, Zeyu.,Taylor, Stuart H..,Ma, Mudi.,Shen, Zhenxing.,...&He, Chi.(2018).Insight into the efficient oxidation of methyl-ethyl-ketone over hierarchically micro-mesostructured Pt/K-(Al)SiO2 nanorod catalysts: Structure-activity relationships and mechanism.APPLIED CATALYSIS B-ENVIRONMENTAL,226,220-233.
MLA	Dummer, Nicholas F.,et al."Insight into the efficient oxidation of methyl-ethyl-ketone over hierarchically micro-mesostructured Pt/K-(Al)SiO2 nanorod catalysts: Structure-activity relationships and mechanism".APPLIED CATALYSIS B-ENVIRONMENTAL 226(2018):220-233.