Synergy between β-Mo2C Nanorods and Non-thermal Plasma for Selective CO2 Reduction to CO

Zhang, Xiao; Liu, Yang; Zhang, Mengtao; Yu, Tao; Chen, Bingbing; Xü, Yao; Crocker, Mark; Zhu, Xiaobing; Zhu, Yuan; Wang, Rongming; Xiao, Dequan; Bi, Mingshu; Ma, Ding; Shi, Chuan

doi:10.1016/j.chempr.2020.09.016

Cited by 67 publications

(49 citation statements)

References 46 publications

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“…As well, they are promising for CO 2 hydrogenation because of the dual-function of H 2 dissociation and C═O bond scission. [109][110][111][112] Porosoff et al 18 reported the CO 2 hydrogenation on defined Mo 2 C surfaces, which are highly active and selective for CO production. The Mo 2 C catalyst shows CO 2 conversion of 8.7% and CO/CH 4 ratio of 14.5 for CO 2 hydrogenation at 300 °C, which outperforms noble metal bimetallic catalysts.…”

Section: Carbide-based Catalystsmentioning

confidence: 99%

“…These results support the mechanism of RWGS reaction on Mo 2 C catalysts including two steps, including CO 2 dissociation on the catalytic surface, and H 2 reduction of the residual O species. 18,115 Moreover, Zhang et al 110 coupled the high activity of Mo 2 C and non-thermal plasma (NTP) technique to produce CO. The TOF activity of β-Mo 2 C nanorods in NTP-catalysis (apply NTP and catalyst, without heating), is two orders of magnitude higher than that obtained in catalysis-only (apply catalyst and heating) (Figs.…”

Section: Carbide-based Catalystsmentioning

confidence: 99%

“…Moreover, Zhang et al 110 coupled the high activity of Mo 2 C and the non-thermal plasma (NTP) technique to produce CO. The TOF activity of β-Mo 2 C nanorods in NTP-catalysis (applying NTP and the catalyst, without heating) is two orders of magnitude higher than that obtained under catalysis-only conditions (applying the catalyst and heating) ( Fig.…”

Section: Carbide-based Catalystsmentioning

confidence: 99%

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Tuning product selectivity in CO₂hydrogenation over metal-based catalysts

Wang

Xiao

2021

Chem. Sci.

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Section: Carbide-based Catalystsmentioning

confidence: 99%

Section: Carbide-based Catalystsmentioning

confidence: 99%

Section: Carbide-based Catalystsmentioning

confidence: 99%

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Tuning product selectivity in CO₂hydrogenation over metal-based catalysts

Wang

Xiao

2021

Chem. Sci.

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“…[1] In addition to the traditional selective catalytic reduction(SCR) method widely used in flue gas denitrification, the selective catalytic oxidation of NO to NO 2 was another promising methods due to the advantages of flexibility, controllability, and applied space effect with high-energy electrons and active radicals produced by dielectric barrier discharge (DBD) reactor, thus reducing the activation energy and improving the conversion efficiency of NO. [17][18][19][20] Based on the above considerations, we aim to develop catalysts with the spatial hetero-shelled interface for superior NO oxidation and excellent sulfur resistance ability by coupling the NTP technology and hierarchical catalysts. Typically, three types of hetero-shelled hollow structure catalysts (MnCuO X , MnO X @ CuO X , , and CuO X @MnO X ) were fabricated by layer-by-layer self-template method, simultaneously regulating the spatial region distribution of the catalytic hetero-shell.…”

Section: Introductionmentioning

confidence: 99%

Hetero‐Shelled Hollow Structure Coupled with Non‐Thermal Plasma Inducing Spatial Charge Rearrangement for Superior NO Conversion and Sulfur Resistance

Liao

Zhao

Yang

et al. 2022

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environmental compatibility. [2] However, the coexistence of NO and SO 2 in the flue gas makes the deactivation of the traditional catalysts, due to the competition adsorption of SO 2 and NO on the active sites of the catalyst surface, resulting in the change of catalyst structure and the decrease of NO conversion efficiency.Recently, many researchers have been focused on tuning the structures of the catalysts to avoid the poison effect caused by SO 2 . The design of active components with the construction of a unique hollow structure presents the enhanced catalytic performance on NO oxidation with the existence of SO 2 . [3] The cavity confinement effect of the hollow nanoreactor could realize the impact on the unique electronic and geometric structure for enhancing the charge transfer and separation in the temporal-spatial catalytic process. [4] The charge transfer induced by the hetero-shelled hollow structure may change the catalytic activity and selectivity. [5] Besides, more interesting catalysts have been developed and applied to NO oxidation, such as composites structure control from one dimensional to three dimensional, [6,7] surface active site including defects engineering, [8,9] and catalytic sites tuning on synergetic conversion. [2,10] Non-thermal plasma(NTP) technology has attracted lots of research attention for NO catalytic removal. [11] The combination of NTP and catalyst can promote the formation of reaction intermediates on the catalyst surface, thus reducing the activation energy of the reaction, and achieving the rapid selective catalytic oxidation of NO at low temperatures. [12][13][14][15] In fact, many researchers attentions have been paid to tune the engineering parameters of the NTP and the advanced catalyst structure design without exploring the synergetic effect on the temporal-spatial structure, which may induce spatial charge rearrangement and trigger the micro-domain surficial species reaction. For instance, Cui et al. [16] studied the process of simultaneous oxidation of NO and SO 2 using non-thermal plasma coupled with catalyst on engineering parameters control. They found that the oxidation efficiency of both NO and SO 2 could be significantly improved in conjunction with further oxidation by the wet electrostatic precipitator (WESP). Furthermore, because of the unique properties of the hetero-shelled hollow structure catalyst, it may also be easier to produce synergistic Facilitating the mass transfer and spatial charge separation is a great challenge for achieving efficient oxidation of NO and outstanding sulfur resistance. Herein, a hydrothermal-assisted confinement growth technique is used to fabricate well-defined three-dimensional CuOx@MnOx hetero-shelled hollow-structure catalysts. By integrating the coupled plasma space reactor and the porous hierarchical structure of the catalyst, excellent stability (10 h) and high conversion of NO (93.86%) are reached under the concentration of SO 2 (1000 mg m -3 ) and NO (200 mg m -3 ). Impressively, precise surface characterization ...

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“…Reaction mechanisms of RWGS can be classified into two categories, i.e., redox mechanism [24,25] and hydrogenation mechanism (through formate (HCOO) or carboxyl (COOH)) [26,27]. The major difference lies in whether hydrogen species involves in the formation of carbon-containing intermediates.…”

Section: Introductionmentioning

confidence: 99%

Active and Stable MgAl2O4 and Ni(SA)/MgAl2O4 Catalysts for the Reverse Water Gas Shift Reaction

Zhang¹,

Song²,

Xing³

et al. 2021

Preprint

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Reverse water gas shift reaction (RWGS) is an important process which plays a vital role in many CO2 utilization related reactions. Noble metals are the most active catalysts in RWGS, but the high price and low reserve strangled their applications. In the present work, we reported a non-transition-metal MgAl2O4 catalyst which showed outstanding activity and stability at high temperatures in the RWGS reaction and improved performance after doping of single atomic Nin+. The catalyst can obtain 46% of CO2 conversion in durability test of 75 h at 800 °C under high weight hourly space velocities (225 000 ml g-1 h-1). The adsorption sites, possible reaction route, and effects of Nin+ single atoms on the (111) surface of MgAl2O4 for RWGS were investigated by in situ DRIFTS and DFT calculations. The results indicated that the rate determining reaction step of RWGS on MgAl2O4 and Ni (SA)/MgAl2O4 were both the reaction of OH* + H* → H2O* + *, but the energy barrier was significantly reduced after introducing single atomic Nin+. Nin+ atoms can increase the hydroxyl coverage on the surface of catalyst and Al3+ sites near the Nin+ ion are considered as the predominant active sites for RWGS reactions.

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Synergy between β-Mo2C Nanorods and Non-thermal Plasma for Selective CO2 Reduction to CO

Cited by 67 publications

References 46 publications

Tuning product selectivity in CO₂hydrogenation over metal-based catalysts

Tuning product selectivity in CO₂hydrogenation over metal-based catalysts

Hetero‐Shelled Hollow Structure Coupled with Non‐Thermal Plasma Inducing Spatial Charge Rearrangement for Superior NO Conversion and Sulfur Resistance

Active and Stable MgAl<sub>2</sub>O<sub>4</sub> and Ni(SA)/MgAl<sub>2</sub>O4 Catalysts for the Reverse Water Gas Shift Reaction

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Synergy between β-Mo2C Nanorods and Non-thermal Plasma for Selective CO2 Reduction to CO

Cited by 67 publications

References 46 publications

Tuning product selectivity in CO2hydrogenation over metal-based catalysts

Tuning product selectivity in CO2hydrogenation over metal-based catalysts

Hetero‐Shelled Hollow Structure Coupled with Non‐Thermal Plasma Inducing Spatial Charge Rearrangement for Superior NO Conversion and Sulfur Resistance

Active and Stable MgAl<sub>2</sub>O<sub>4</sub> and Ni(SA)/MgAl<sub>2</sub>O4 Catalysts for the Reverse Water Gas Shift Reaction

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Tuning product selectivity in CO₂hydrogenation over metal-based catalysts

Tuning product selectivity in CO₂hydrogenation over metal-based catalysts