PromotioneffectsofalkalimetalsonironmolybdatecatalystsforCO2catalytichydrogenation

被引：3

作者：

Yong Zhou ^{[1
]}

Aliou Sadia Traore ^{[2
]}

Deizi VPeron ^{[1
]}

Alan JBarrios ^{[1
]}

Sergei AChernyak ^{[1
]}

Massimo Corda ^{[1
]}

Olga VSafonova ^{[3
]}

Achim Iulian Dugulan ^{[4
]}

Ovidiu Ersen ^{[2
]}

Mirella Virginie ^{[1
]}

Vitaly VOrdomsky ^{[1
]}

Andrei YKhodakov ^{[1
]}

机构：

[1] University of Lille, CNRS, Centrale Lille, University of Artois, UMR -UCCS-Unité de Catalyse et Chimie du Solide

[2] IPCMS, UMR CNRS, Université de Strasbourg

[3] PSI

[4] Fundamental Aspects of Materials and Energy Group, Delft University of Technology

来源：

Journal of Energy Chemistry | 2023年 / 85卷 / 10期

关键词：

D O I：

暂无

中图分类号：

TQ426 [催化剂（触媒）]; X701 [废气的处理与利用];

学科分类号：

080502 ; 081705 ; 083002 ;

摘要：

CO2 hydrogenation is an attractive way to store and utilize carbon dioxide generated by industrial processes, as well as to produce valuable chemicals from renewable and abundant resources. Iron catalysts are commonly used for the hydrogenation of carbon oxides to hydrocarbons. Iron-molybdenum catalysts have found numerous applications in catalysis, but have been never evaluated in the CO2 hydrogenation.In this work, the structural properties of iron-molybdenum catalysts without and with a promoting alkali metal（Li, Na, K, Rb, or Cs） were characterized using X-ray diffraction, hydrogen temperatureprogrammed reduction, CO2 temperature-programmed desorption, in-situ57Fe Mossbauer spectroscopy and operando X-ray adsorption spectroscopy. Their catalytic performance was evaluated in the CO2 hydrogenation. During the reaction conditions, the catalysts undergo the formation of an iron（Ⅱ） molybdate structure, accompanied by a partial reduction of molybdenum and carbidization of iron. The rate of CO2 conversion and product selectivity strongly depend on the promoting alkali metals, and electronegativity was identified as an important factor affecting the catalytic performance. Higher CO2 conversion rates were observed with the promoters having higher electronegativity, while low electronegativity of alkali metals favors higher light olefin selectivity.

引用

页码：291 / 300

页数：10