Probing the morphological effects of ReOx/CeO2 catalysts on the CO2 hydrogenation reaction

Yang, Bin; Wang, Yifu; Li, Longtai; Gao, Biao; Zhang, Lingxia; Guo, Limin

doi:10.1039/d1cy02096j

Cited by 17 publications

(6 citation statements)

References 40 publications

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“…The calculated activation barriers (ΔE act ) on ReO x for H 2 dissociative adsorption were 79 and 44 kJ/mol with respect to the adsorbed H 2 and gaseous H 2 , suggesting the possible H 2 activation/dissociation over A comparison study of Re on ceria with different morphologies also confirmed the capacity of Re to active the molecular H 2 . 47 Strong Re−CeO 2 electronic interactions with the Re species at the low-valence state were generated on ceria nanorods. The adsorption of atomic hydrogen prior to the deposition of CO 3 2− hindered the coke deposition during the CO 2 hydrogenation, which became a key step for better catalytic performance.…”

Section: ■ Hydrogenation On Monometallic Rhenium Centermentioning

confidence: 99%

Rhenium in Heterogeneous Catalysis: A Rising Star for Hydrogenation Reactions

Luo,

Liang

2024

ACS Catal.

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Rhenium has a special existence in precious metals. In current catalysis, nanoscale Re(O x ) is appreciated by researchers and used to design effective catalyst systems for a variety of hydrogenation reactions, which are widely applied in the fields of petroleum refining, industrial chemical production, and biomass conversion. Current reports focus on the shining characteristics of Re with changeable chemical valences and high oxophilicity. Re-based catalyst provides an essential electronic environment in bimetallic catalysts or behaves as the main reactive center with efficiency. Regardless, there are still limited research works on rhenium compared to other traditional metal catalysts. Herein, investigations concerning Re catalysis during the past decade are summarized. As a burgeoning star, the essential roles of Re sites as a decorator and even the main centers are interpreted in this Review. The advantages of Re in bimetallic and monometallic catalysts, the available-tuned surface and geometric structure, the factors influencing their catalytic behaviors, and the typical heterogeneous reaction models are expressed thoroughly. This Review may shed light on those researchers who are anxious to find more strategies to conquer a tough task and those who are just stepping into the world of rhenium catalysis.

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Section: ■ Hydrogenation On Monometallic Rhenium Centermentioning

confidence: 99%

Rhenium in Heterogeneous Catalysis: A Rising Star for Hydrogenation Reactions

Luo,

Liang

2024

ACS Catal.

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“…The effect of different morphology of CeO 2 support on the activity of CeO 2 -based catalysts for CO 2 hydrogenation has been studied extensively due to the highly tunable crystal texture. 153–156 For CO 2 methanation, the activity over the CeO 2 -based catalysts is strongly affected by the morphology of CeO 2 . Compared with a commercial nano-CeO 2 (Aladdin, 20 nm, 99.5% metals basis)-supported Ni catalyst (∼60%), Ni/CeO 2 -nanoplates (Ni/CeO 2 -P) exhibited a higher CO 2 conversion of 73% at 260 °C.…”

Section: Strategies To Raise the Catalytic Performance Over Ceria-bas...mentioning

confidence: 99%

Progress in reaction mechanisms and catalyst development of ceria-based catalysts for low-temperature CO₂methanation

Xie

Wen

et al. 2023

Green Chem.

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“…The activation of CO 2 , which leads to the formation of the species responsible for further hydrogenation, is a kinetic step. It has been debated whether this process involves formate intermediates (CO 2 hydrogenates to HCOO) or a simple redox chemistry (CO 2 directly reduces to CO). ,− Both the RWGS reaction and CO 2 methanation are typical multi-step hydrogenation processes; ,,, the catalysts below a critical size may undergo different catalytic pathways than those with a large-sized cluster. The vague and unclear nature of the interaction between the reactants and the active sites underscores the need for a site-specific approach.…”

Section: Introductionmentioning

confidence: 99%

Size-Dependent Active Site and Its Catalytic Mechanism for CO₂ Hydrogenation Reactivity and Selectivity over Re/TiO₂

et al. 2023

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The relationship of structure sensitivity between metal size and CO2 hydrogenation performance is still unclear. Herein, using a unique set of well-defined TiO2-supported rhenium (Re) catalysts and systematical characterizations, we clearly demonstrate that the active site and reaction mechanism are closely related to the size effect. A wave-like size-dependent activity of CO2 conversion is also identified. In the size range from single atom to 1.0 nm, the reverse water gas shift (RWGS) reaction controls CO2 hydrogenation, and its turnover frequency decreases with the size increasing. Conversely, for clusters over 1.0 nm, CO2 methanation becomes the main reaction and shows a volcano-like size-dependent performance. The mechanistic study reveals that the perimeter site in single-atom catalysts dictates the RWGS reaction via formate pathways. In contrast, the active site in the Re cluster is the edge site, where CO2 reduces to CO via a redox pathway and subsequently hydrogenates to methane over the edge site. This discovery may deepen the mechanistic understanding of structure sensitivity.

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Probing the morphological effects of ReO_x/CeO₂ catalysts on the CO₂ hydrogenation reaction

Abstract: The performance optimization of ceria (CeO2)-supported catalysts in heterogeneous reactions can be enabled by the control of crystal morphology. However, the insights into how CeO2-morphology affects the CO2 hydrogenation performance...

Cited by 17 publications

References 40 publications

Rhenium in Heterogeneous Catalysis: A Rising Star for Hydrogenation Reactions

Rhenium in Heterogeneous Catalysis: A Rising Star for Hydrogenation Reactions

Progress in reaction mechanisms and catalyst development of ceria-based catalysts for low-temperature CO₂methanation

Size-Dependent Active Site and Its Catalytic Mechanism for CO₂ Hydrogenation Reactivity and Selectivity over Re/TiO₂

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Probing the morphological effects of ReOx/CeO2 catalysts on the CO2 hydrogenation reaction

Abstract: The performance optimization of ceria (CeO2)-supported catalysts in heterogeneous reactions can be enabled by the control of crystal morphology. However, the insights into how CeO2-morphology affects the CO2 hydrogenation performance...

Cited by 17 publications

References 40 publications

Rhenium in Heterogeneous Catalysis: A Rising Star for Hydrogenation Reactions

Rhenium in Heterogeneous Catalysis: A Rising Star for Hydrogenation Reactions

Progress in reaction mechanisms and catalyst development of ceria-based catalysts for low-temperature CO2methanation

Size-Dependent Active Site and Its Catalytic Mechanism for CO2 Hydrogenation Reactivity and Selectivity over Re/TiO2

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Product

Resources

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Probing the morphological effects of ReO_x/CeO₂ catalysts on the CO₂ hydrogenation reaction

Progress in reaction mechanisms and catalyst development of ceria-based catalysts for low-temperature CO₂methanation

Size-Dependent Active Site and Its Catalytic Mechanism for CO₂ Hydrogenation Reactivity and Selectivity over Re/TiO₂