Role of Co species on Co/KIT‐6 catalyst surface in CO<sub>2</sub> hydrogenation

Zhou, Guilin; Ai, Xing; Tian, Yuan; Huang, Rui; Feng, Yujie; Ren, Jun

doi:10.1002/ghg.2137

Cited by 5 publications

(4 citation statements)

References 22 publications

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“…The reported research results confirmed that metal Co species were the mainly active species in CO 2 catalytic hydrogenation, and the composition of Co species could significantly affect CO 2 hydrogenation activity and selectivity [9–11] . The study results on mesoporous Co/SiO 2 catalysts confirmed that the Co species composition, grain size, pore size and pore structure order of the Co/SiO 2 catalysts had a significant effect on the CO 2 hydrogenation activity and selectivity.…”

Section: Introductionsupporting

confidence: 59%

Support Nano‐Co/CeO_2‐δ Catalyst for CO₂ Hydromethanation

Gou

Chen²,

Zheng

et al. 2023

ChemistrySelect

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The large‐scale use of fossil fuels had resulted in massive emission of CO2 and a series of serious environmental problems, which directly threatening human survival and sustainable development. CO2 is also the abundant carbon resource in C1 family. CO2 catalytic hydrogenation to CH4 is one of the effective ways to ultilize CO2 with low energy and high efficiency, which has been widely concerned in recent years. Suppoted nano‐Co/CeO2‐δ catalysts were prepared and evaluated their CO2 hydrogenation performances. XRD, H2‐TPR, H2‐TPD and CO2‐TPD had been conducted to study the physicochemical properties of the prepared Co/CeO2‐δ catalysts. The Co loading significantly affects the physicochemical properties and CO2 hydrogenation performances. The active metal Co species were highly diepersed on the CeO2 support surface. The number of active metal Co species, which formed by H2 reduction, increased with the increasing of Co loading. And the ability to adsorb and activate the reactant H2 and CO2 molecules was also enhanced, which effectively promoted the CO2 hydrogenation performances. Among of the studied Co/CeO2‐δ catalysts, the CoCe09 catalyst with Co loading of 9 % showed the best CO2 catalytic hydrogenation activity. In the reaction temperature of 240–400 °C, the CO2 conversion and CH4 selectivity follow the order: CoCe01

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Section: Introductionsupporting

confidence: 59%

Support Nano‐Co/CeO_2‐δ Catalyst for CO₂ Hydromethanation

Gou

Chen²,

Zheng

et al. 2023

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“…What is more, it can improve catalytic performances and inhibit catalysts from being sintered by enhancing the properties of surface‐active species. KIT‐6 support is a mesoporous SiO 2 material with I a3d cubic pore structure, which has the advantages of high specific surface area, adjustable pore structure, and high hydrothermal stability, favoring the formation of active centers on the catalyst surface 32–35 . Meanwhile, the abundant pore structure and large surface area of the SiO 2 can promote the stability of active metal phases on the support surface in the process of high temperature calcination or/and reduction.…”

Section: Introductionmentioning

confidence: 99%

“…KIT-6 support is a mesoporous SiO 2 material with I a3d cubic pore structure, which has the advantages of high specific surface area, adjustable pore structure, and high hydrothermal stability, favoring the formation of active centers on the catalyst surface. [32][33][34][35] Meanwhile, the abundant pore structure and large surface area of the SiO 2 can promote the stability of active metal phases on the support surface in the process of high temperature calcination or/and reduction. Thus, metal component sintering and aggregation are prevented, which can improve catalytic performances.…”

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confidence: 99%

High efficient CuCeO_2‐δ/SiO₂ catalyst for RWGS reaction: impact of Ce content and loading sequence

Zhao,

Yang,

Yao

et al. 2024

Greenhouse Gases

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The extensive use of fossil energy leads to wanton emission of CO2 and serious environmental problems. The exploration of high‐performance catalysts plays a pivotal role in CO2 resource utilization. In this paper, CuCeyK catalysts are prepared by wet impregnation method using ordered mesoporous SiO2 as support for the reverse water gas shift (RWGS) reaction. The physicochemical properties of the prepared catalysts are characterized by H2‐TPR, BET, XRD, Quasi in‐situ XPS, H2‐TPD, and CO2‐TPD techniques. The results demonstrate thatthe Cu0 species can form synergistic effects with oxygen vacancies (Ov) to enhance the CuCeyK catalytic performance. Additionally, the electronic effects between Ce and Cu not only enhances the adsorption and activation performances of the catalyst towards CO2 and H2 molecules, but also effectively suppresses the sintering of Cu0 species, thereby enhancing the stability of the corresponding catalyst. It is worth mentioning that the Ce content also directly affects the catalytic performances of the CuCeyK catalyst. The CuCe15K catalyst with a Ce content of 15% displays excellent CO2 hydrogenation performances, and the CO2 conversion and CO selectivity up to 41 % and 100 % at 420 °C, respectively. © 2024 Society of Chemical Industry and John Wiley & Sons, Ltd.

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“…For CO 2 hydromethanation catalyst, the research mainly focuses on transition metal Ni and Co catalysts. [2][3][4][5] Metal Ni catalyst has superior deep hydrogenation performances, and the research in CO 2 hydromethanation reaction is more extensive.…”

Section: Introductionmentioning

confidence: 99%

Preparation of Porous NiCe Composite Catalyst and Its Performance for CO₂ Hydrogenation

Zhou

et al. 2022

ChemNanoMat

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Ni component can be effectively introduced into CeO 2 by a soft template method to prepare porous NiCe composite catalysts. The reducibility of the catalyst precursors was studied by H 2 -TPR. The physicochemical properties of the prepared NiCe composite catalysts were characterized by XRD, quasi in-situ XPS, BET and TEM. And the catalytic performances of the corresponding NiCe composite catalysts was evaluated by CO 2 catalytic hydrogenation. The synergistic effect of Ni and Ce species can significantly improve the reducibility of the precursors to form CO 2 hydrogenation active sites in the corresponding NiCe composite catalysts. The morphology, pore structure, specific surface area, crystallinity and content of metal Ni species of the prepared NiCe composite catalysts were significantly affected by n Ni /n Ce ratio, which can affect the CO 2 catalytic hydrogenation performances of NiCe composite catalysts. The synergistic effect of Ni and Ce species can also promote the formation of NiCe composite catalyst nanoparticles with small particle size about 5-10 nm. The developed mesoporous structure and high specific surface area can be formed in the prepared NiCe composite catalysts. The NC3 catalyst with a n Ni /n Ce ratio of 3.0 showed the best CO 2 hydroreduction performances and use stability. When the reaction temperature was 300 °C, the CO 2 conversion and CH 4 selectivity can reach 85.6% and 100%, respectively. Even if the reaction temperature rises to 340 °C, the CO 2 conversion and CH 4 selectivity can be maintained at 83.7% and 100% in the continuous reaction of 600 min, respectively.

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Role of Co species on Co/KIT‐6 catalyst surface in CO₂ hydrogenation

Cited by 5 publications

References 22 publications

Support Nano‐Co/CeO_2‐δ Catalyst for CO₂ Hydromethanation

Support Nano‐Co/CeO_2‐δ Catalyst for CO₂ Hydromethanation

High efficient CuCeO_2‐δ/SiO₂ catalyst for RWGS reaction: impact of Ce content and loading sequence

Preparation of Porous NiCe Composite Catalyst and Its Performance for CO₂ Hydrogenation

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Role of Co species on Co/KIT‐6 catalyst surface in CO2 hydrogenation

Cited by 5 publications

References 22 publications

Support Nano‐Co/CeO2‐δ Catalyst for CO2 Hydromethanation

Support Nano‐Co/CeO2‐δ Catalyst for CO2 Hydromethanation

High efficient CuCeO2‐δ/SiO2 catalyst for RWGS reaction: impact of Ce content and loading sequence

Preparation of Porous NiCe Composite Catalyst and Its Performance for CO2 Hydrogenation

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Role of Co species on Co/KIT‐6 catalyst surface in CO₂ hydrogenation

Support Nano‐Co/CeO_2‐δ Catalyst for CO₂ Hydromethanation

Support Nano‐Co/CeO_2‐δ Catalyst for CO₂ Hydromethanation

High efficient CuCeO_2‐δ/SiO₂ catalyst for RWGS reaction: impact of Ce content and loading sequence

Preparation of Porous NiCe Composite Catalyst and Its Performance for CO₂ Hydrogenation