Essential role of oxygen vacancies of Cu-Al and Co-Al spinel oxides in their catalytic activity for the reverse water gas shift reaction

Bahmanpour, Ali M.; Héroguel, Florent; Kılıç, Murat; Baranowski, Christophe J.; Schouwink, Pascal; Röthlisberger, Ursula; Luterbacher, Jeremy S.; Kröcher, Oliver

doi:10.1016/j.apcatb.2020.118669

Cited by 80 publications

(40 citation statements)

References 47 publications

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“…The concept of the overall charge neutrality of the lattice can comprehensively explain the oxygen vacancy formation process. The oxygen vacancies are formed to balance the positive charges in the structure [21] . Thus, more oxygen vacancies are formed in the structure with more Al incorporation.…”

Section: Resultsmentioning

confidence: 99%

“…The oxygen vacancies are formed to balance the positive charges in the structure. [21] Thus, more oxygen vacancies are formed in the structure with more Al incorporation. ii) The calcination and subsequent reduction process at 250°C can create large number of O defects in the catalyst owing to the loss of surface oxygen species.…”

Section: Correlations Between Activity and Structural Parametersmentioning

confidence: 99%

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Isomorphous substitution method to fabricating pure phase Al‐doped zinc malachite: defects driven promotion improvement and enhanced synergy between Cu−ZnO

et al. 2020

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A two-step strategy for making Al-doped pure-phase zinc malachite has been demonstrated to improve the microstructure properties of Cu/ZnO/Al 2 O 3 catalyst. The optimal incorporation of Al into the single-phase zinc malachite lattice improved promotional effect of Al to utmost extent. Introduction of Al in zinc malachite lattice leads to a dispersion and stabilization of CuO domains and perceive maximum degree of intimate solid solution of the three metal oxides in the calcined catalysts owing to the enhanced "dilution" effect. The maximum of 8 mol% of Al based on Cu could be introduced in zinc malachite without any by-phase formation. The best performing catalyst, IS32-Al 0.08 C unveil~8.8-fold increase in the methanol formation rate as compared to the unpromoted catalyst. Al was found to promote the synergy between CuÀ ZnO by introducing defect sites as well as electronically modifying ZnO reducibility. For the first time, such an effective strategy of promoter incorporation is reported for the formation of Cu/ZnO/Al 2 O 3 catalyst with exceptional microstructure properties.

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Section: Resultsmentioning

confidence: 99%

Section: Correlations Between Activity and Structural Parametersmentioning

confidence: 99%

Isomorphous substitution method to fabricating pure phase Al‐doped zinc malachite: defects driven promotion improvement and enhanced synergy between Cu−ZnO

et al. 2020

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“…In order to address these issues, persistent studies have concentrated on the fabrication of composite oxides (Liu et al, 2015;Dai et al, 2018;Ronda-Lloret et al, 2018;Panarities et al, 2020), spinel oxides (i.e., ZnAl 2 O 4 , ZnCr 2 O 4 , CuAl 2 O 4 , CoAl 2 O 4 , etc.) (Joo and Jung, 2003;Bahmanpour et al, 2019Bahmanpour et al, , 2020 LaNiO 3 , La 0.9 Sr 0.1 NiO 3+δ , La 0.9 Sr 0.1 FeO 3−δ , La 0.9 Sr 0.1 Ni 0.5 Fe 0.5 O 3−δ , La 0.75 Sr 0.25 Cr 0.5 Mn 0.5 O 3−δ , SrCe 0.9 Y 0.1 O 3−δ , etc.) (Yamazoe et al, 1982;Ten Elshof et al, 1996;Klvana et al, 1999;Yang and Lin, 2006;Radovic et al, 2008;Zhuang et al, 2019;Bogolowski et al, 2020;Liu et al, 2020), which have the approvable characteristics of both stable structure and reverse oxygen storage capacity to increase RWGSR performance.…”

Section: Catalytic Systemmentioning

confidence: 99%

“…(Liu et al, 2015 ; Dai et al, 2018 ; Ronda-Lloret et al, 2018 ; Panarities et al, 2020 ), spinel oxides (i.e., ZnAl 2 O 4 , ZnCr 2 O 4 , CuAl 2 O 4 , CoAl 2 O 4 , etc.) (Joo and Jung, 2003 ; Bahmanpour et al, 2019 , 2020 ), solid solution oxides (i.e., Zn x Zr 1−x O 2−y , Ce 0.5 Zr 0.5 O 2 , Ni x Ce 0.75 Zr 0.25−x O 2 , etc.) (Zonetti et al, 2014 ), and perovskite-type oxides (i.e., BaZr 0.8 Y 0.16 Zn 0.04 O 3 , La 0.75 Sr 0.25 CoO 3−δ , La 0.75 Sr 0.25 FeO 3 , La 0.75 Sr 0.25 Fe 1−Y Cu Y O 3 , LaNiO 3 , La 0.9 Sr 0.1 NiO 3+δ , La 0.9 Sr 0.1 FeO 3−δ , La 0.9 Sr 0.1 Ni 0.5 Fe 0.5 O 3−δ , La 0.75 Sr 0.25 Cr 0.5 Mn 0.5 O 3−δ , SrCe 0.9 Y 0.1 O 3−δ , etc.)…”

Section: Catalytic Systemmentioning

confidence: 99%

Recent Advances in Supported Metal Catalysts and Oxide Catalysts for the Reverse Water-Gas Shift Reaction

et al. 2020

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The reverse water-gas shift reaction (RWGSR), a crucial stage in the conversion of abundant CO 2 into chemicals or hydrocarbon fuels, has attracted extensive attention as a renewable system to synthesize fuels by non-traditional routes. There have been persistent efforts to synthesize catalysts for industrial applications, with attention given to the catalytic activity, CO selectivity, and thermal stability. In this review, we describe the thermodynamics, kinetics, and atomic-level mechanisms of the RWGSR in relation to efficient RWGSR catalysts consisting of supported catalysts and oxide catalysts. In addition, we rationally classify, summarize, and analyze the effects of physicochemical properties, such as the morphologies, compositions, promoting abilities, and presence of strong metal-support interactions (SMSI), on the catalytic performance and CO selectivity in the RWGSR over supported catalysts. Regarding oxide catalysts (i.e., pure oxides, spinel, solid solution, and perovskite-type oxides), we emphasize the relationships among their surface structure, oxygen storage capacity (OSC), and catalytic performance in the RWGSR. Furthermore, the abilities of perovskite-type oxides to enhance the RWGSR with chemical looping cycles (RWGSR-CL) are systematically illustrated. These systematic introductions shed light on development of catalysts with high performance in RWGSR.

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“…In addition, recent research has also indicated that molybdenum carbide as a bifunctional material could activate CO 2 through breaking the C = O bond and dissociate H 2 molecules, rendering it as one of the most promising candidates in the RWGS reaction [26][27][28] . The selectivity of product is significantly influenced by the nature of active species of metals, can be controlled by the introduction of promoters such as K or Fe [29] , dispersed in a reducible oxide or carbide support (such as CeO 2 or β-Mo 2 C) [30 , 31] .…”

Section: Introductionmentioning

confidence: 99%

Molybdenum carbide clusters for thermal conversion of CO2 to CO via reverse water-gas shift reaction

Guo

Jiang

et al. 2020

Journal of Energy Chemistry

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Essential role of oxygen vacancies of Cu-Al and Co-Al spinel oxides in their catalytic activity for the reverse water gas shift reaction

Cited by 80 publications

References 47 publications

Isomorphous substitution method to fabricating pure phase Al‐doped zinc malachite: defects driven promotion improvement and enhanced synergy between Cu−ZnO

Isomorphous substitution method to fabricating pure phase Al‐doped zinc malachite: defects driven promotion improvement and enhanced synergy between Cu−ZnO

Recent Advances in Supported Metal Catalysts and Oxide Catalysts for the Reverse Water-Gas Shift Reaction

Molybdenum carbide clusters for thermal conversion of CO2 to CO via reverse water-gas shift reaction

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