Heterogeneous Cu–Fe oxide catalysts for preferential CO oxidation (PROX) in H2-rich process streams
نویسندگان
چکیده
منابع مشابه
Copper Catalysts Supported on CeMnO2 for CO Oxidation in Hydrogen-Rich Gas Streams
e"> The CeMnO2 supports were prepared via co-precipitation method by ammonia as <span style="font-size: 9p...
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Aiming at an improved mechanistic understanding of the preferential oxidation of CO on supported Au catalysts, we have investigated the competition between CO and H2 for stable, active oxygen (Oact) species on a Au/TiO2 catalyst during the simultaneous exposure to CO and H2 with various CO/H2 ratios at 80 ̋C and 400 ̋C by quantitative temporal analysis of products (TAP) reactor measurements. It...
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This article reviews work done at authors’ laboratories about catalysts based on combinations between copper and ceria for preferential oxidation of CO in H2-rich streams (CO-PROX). The main focus of this review is the characterization of active sites for the process on the basis of spectroscopic analysis of the systems under reaction conditions (operando techniques). On such a basis, it is exp...
متن کاملPreferential CO oxidation in hydrogen (PROX) on ceria supported catalysts PART II. Oxidation states and surface species on Pd/CeO2 under reac- tion conditions, suggested reaction mechanism
The aim of the PROX reaction is to reduce the CO content of hydrogen feed to proton exchange membrane fuel cells (PEMFC) by selective oxidation of CO in the presence of excess hydrogen. Both Pt and Pd on ceria are active in CO oxidation (without hydrogen) while Pd is poorly active in the presence of hydrogen. In this paper we aimed at finding the reasons of such behavior, using the same techniq...
متن کاملPreferential CO oxidation in hydrogen (PROX) on ceria supported catalysts PART I. Oxidation state and surface species on Pt/CeO2 under reaction conditions
The CO content of hydrogen feed to proton exchange membrane fuel cells (PEMFC) must be kept under 1-100 ppm for their proper operation. This can be achieved by using catalysts able to selectively oxidize CO in the presence of excess hydrogen (PROX). The present study reports on the mechanism of PROX reaction on Pt/CeO2 catalyst, by using catalytic tests, in-situ DRIFTS, high-pressure XPS, HRTEM...
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ژورنال
عنوان ژورنال: RSC Advances
سال: 2020
ISSN: 2046-2069
DOI: 10.1039/d0ra06969h