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题名: Promotion effects of potassium on the activity and selectivity of Pt/zeolite catalysts for reverse water gas shift reaction
作者: Yang, Xiaoli1, 2;  Su, Xiong1;  Chen, Xiaodong1, 2;  Duan, Hongmin1;  Liang, Binglian1, 2;  Liu, Qinggang1;  Liu, Xiaoyan1;  Ren, Yujing1, 2;  Huang, Yanqiang1;  Zhang, Tao1
关键词: RWGS ;  KLTL zeolite ;  Potassium promoter ;  Formate
刊名: APPLIED CATALYSIS B-ENVIRONMENTAL
发表日期: 2017-11-05
DOI: 10.1016/j.apcatb.2017.05.067
卷: 216, 页:95-105
收录类别: SCI
文章类型: Article
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
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.
关键词[WOS]: METAL-SUPPORT INTERACTIONS ;  CO2 HYDROGENATION ;  ORGANIC FRAMEWORKS ;  CARBON-DIOXIDE ;  PLATINUM CATALYSTS ;  CU/SIO2 CATALYSTS ;  PT/TIO2 CATALYSTS ;  TEMPERATURE ;  ADSORPTION ;  REDUCTION
语种: 英语
WOS记录号: WOS:000402816700010
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/152230
Appears in Collections:中国科学院大连化学物理研究所_期刊论文

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作者单位: 1.Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Catalysis, 457 Zhongshan Rd, Dalian 116023, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China

Recommended Citation:
Yang, Xiaoli,Su, Xiong,Chen, Xiaodong,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.
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