Promotion effects of potassium on the activity and selectivity of Pt/zeolite catalysts for reverse water gas shift reaction

doi:10.1016/j.apcatb.2017.05.067

	Promotion effects of potassium on the activity and selectivity of Pt/zeolite catalysts for reverse water gas shift reaction
	Zhang, Tao 2; Chen, Xiaodong 1,2; Su, Xiong 2; Duan, Hongmin 2; Liang, Binglian 1,2; Liu, Qinggang 2; Yang, Xiaoli 1,2; Liu, Xiaoyan 2; Ren, Yujing 1,2; Huang, Yanqiang 2
刊名	APPLIED CATALYSIS B-ENVIRONMENTAL
	2017-11-05
卷号	216 页码:95-105
关键词	Rwgs Kltl Zeolite Potassium Promoter Formate
DOI	10.1016/j.apcatb.2017.05.067
英文摘要	Catalytic hydrogenation of carbon dioxide to CO by reverse water gas shift reaction plays a vital role in the recycling of the abundant carbon source. Here, the reaction over a series of zeolite L-supported platinum catalysts was systematically investigated to study the promoting role of potassium. The results of activity tests showed that controlled addition of potassium promoter to Pt/L catalyst was beneficial for the catalytic activity and selectivity. It was observed that cage encapsulation by zeolite pores could stabilize Pt nano-particles even at severe reaction conditions. Furthermore, X-ray absorption near edge structure and X-ray photoelectron spectra results demonstrated that the chemical state of platinum was altered by the additional potassium promoter, providing evidence for the formation of Pt-O(OH)-K interfacial sites. Thereafter, the Pt-O(OH)-K interfaces, acting as main active sites to adsorb CO2 and produce bridge-bonded formate intermediates, were identified by a set of in -situ diffuse reflectance Fourier transform infrared spectroscopy and microcalorimetry measurements. This finding provides new insights into the use of a variety of zeolite as carriers for highly dispersed noble metal in catalytic CO2 reduction. (C) 2017 Elsevier B.V. All rights reserved.
语种	英语
WOS记录号	WOS:000402816700010
内容类型	期刊论文
源URL	[http://cas-ir.dicp.ac.cn/handle/321008/152230]
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.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 2.Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Catalysis, 457 Zhongshan Rd, Dalian 116023, Peoples R China
推荐引用方式 GB/T 7714	Zhang, Tao,Chen, Xiaodong,Su, Xiong,et al. Promotion effects of potassium on the activity and selectivity of Pt/zeolite catalysts for reverse water gas shift reaction[J]. APPLIED CATALYSIS B-ENVIRONMENTAL,2017,216:95-105.
APA	Zhang, Tao.,Chen, Xiaodong.,Su, Xiong.,Duan, Hongmin.,Liang, Binglian.,...&Huang, Yanqiang.(2017).Promotion effects of potassium on the activity and selectivity of Pt/zeolite catalysts for reverse water gas shift reaction.APPLIED CATALYSIS B-ENVIRONMENTAL,216,95-105.
MLA	Zhang, Tao,et al."Promotion effects of potassium on the activity and selectivity of Pt/zeolite catalysts for reverse water gas shift reaction".APPLIED CATALYSIS B-ENVIRONMENTAL 216(2017):95-105.