CO2 hydrogenation over acid-activated Attapulgite/Ce0.75Zr0.25O2 nanocomposite supported Cu-ZnO based catalysts

Guo, Haijun; Li, Qinglin; Zhang, Hairong; Peng, Fen; Yao, Shimiao; Huang, Chao; Chen, Xinde

doi:10.1016/j.mcat.2019.110499

Cited by 13 publications

(12 citation statements)

References 71 publications

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“…Xiao et al have investigated the effect of bimetallic oxides TiO 2 -ZrO 2 on the catalytic performance of Cu-ZnO catalyst for CO 2 hydrogenation to CH 3 OH. 90 The incorporation of bimetallic oxides not only reduces the particle sizes of both CuO and ZnO and enlarges the Cu surface area but also 168 Similar promoting effect is obtained on the CuZnCeTi mixed oxides catalysts, which can be attributed to the improved CO 2 uptake due to the TiCe-induced strong basic sites. 169 Saito et al have developed metal oxides-mixed Cu/ZnO catalysts, and the most active catalyst system is the multicomponent Cu/ZnO catalyst, consisting of Al 2 O 3 , ZrO 2 , Ga 2 O 3 , and Cr 2 O 3 as modifiers.…”

Section: Transition Metal and Oxide Catalysts 21 Innovation Of Classi...mentioning

confidence: 76%

“…Guo et al. have observed enhanced methanol synthesis activity on Attapulgite/Ce 0.75 Zr 0.25 O 2 (ATP-CZO), which originates from the synergy between well-dispersed Cu sites and strong basic ZnO sites, as well as that between ATP-CZO composites and ZnO-CZO surfaces on the catalyst surface . Similar promoting effect is obtained on the CuZnCeTi mixed oxides catalysts, which can be attributed to the improved CO 2 uptake due to the TiCe-induced strong basic sites …”

Section: Transition Metal and Oxide Catalystsmentioning

confidence: 80%

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Recent Advances in Carbon Dioxide Hydrogenation to Methanol via Heterogeneous Catalysis

et al. 2020

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The utilization of fossil fuels has enabled an unprecedented era of prosperity and advancement of well-being for human society. However, the associated increase in anthropogenic carbon dioxide (CO2) emissions can negatively affect global temperatures and ocean acidity. Moreover, fossil fuels are a limited resource and their depletion will ultimately force one to seek alternative carbon sources to maintain a sustainable economy. Converting CO2 into value-added chemicals and fuels, using renewable energy, is one of the promising approaches in this regard. Major advances in energy-efficient CO2 conversion can potentially alleviate CO2 emissions, reduce the dependence on nonrenewable resources, and minimize the environmental impacts from the portions of fossil fuels displaced. Methanol (CH3OH) is an important chemical feedstock and can be used as a fuel for internal combustion engines and fuel cells, as well as a platform molecule for the production of chemicals and fuels. As one of the promising approaches, thermocatalytic CO2 hydrogenation to CH3OH via heterogeneous catalysis has attracted great attention in the past decades. Major progress has been made in the development of various catalysts including metals, metal oxides, and intermetallic compounds. In addition, efforts are also put forth to define catalyst structures in nanoscale by taking advantage of nanostructured materials, which enables the tuning of the catalyst composition and modulation of surface structures and potentially endows more promising catalytic performance in comparison to the bulk materials prepared by traditional methods. Despite these achievements, significant challenges still exist in developing robust catalysts with good catalytic performance and long-term stability. In this review, we will provide a comprehensive overview of the recent advances in this area, especially focusing on structure–activity relationship, as well as the importance of combining catalytic measurements, in situ characterization, and theoretical studies in understanding reaction mechanisms and identifying key descriptors for designing improved catalysts.

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Section: Transition Metal and Oxide Catalysts 21 Innovation Of Classi...mentioning

confidence: 76%

Section: Transition Metal and Oxide Catalystsmentioning

confidence: 80%

Recent Advances in Carbon Dioxide Hydrogenation to Methanol via Heterogeneous Catalysis

et al. 2020

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“…Here, the acidified ATP was selected, and the surface of ATP was chemically functionalized to enhance its optimization potential and increase the formation density of •OH. ATP with high adsorption capacity and microporous structure is proved to be a low-cost carrier for the removal of pollutants from wastewater [27]. Therefore, the composite catalyst (Fe-Mn-Cu@ATP) has been shown to perform well in photo-Fenton catalytic oxidation.…”

Section: Effects Of Different Treatment Systemsmentioning

confidence: 99%

“…The focus of this study is to prepare multiphase Fe 2 O 3 -MnO-CuO composite material loaded on modified ATP (labeled as Fe-Mn-Cu@ATP), and study catalytic performance in degradation of organic pollutants under different conditions by using H 2 O 2 and UV irradiation in actual chemical pharmaceutical wastewater. Sodium pyrophosphate was selected as the dispersant in the purification process of ATP, and the purified ATP was modified by acidification [26], so that the final catalyst had high reaction activity, high stability and high degradation rate [27]. Then the effects of pH, solid catalyst, hydrogen peroxide dosage and light intensity on the removal of pollutants were systematically investigated.…”

Section: Introductionmentioning

confidence: 99%

Heterogeneous Photo-Fenton Catalytic Degradation of Practical Pharmaceutical Wastewater by Modified Attapulgite Supported Multi-Metal Oxides

Wang

et al. 2021

Water

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Chemical synthetic pharmaceutical wastewater has characteristics of high concentration, high toxicity and poor biodegradability, so it is difficult to directly biodegrade. We used acid modified attapulgite (ATP) supported Fe-Mn-Cu polymetallic oxide as catalyst for multi-phase Fenton-like ultraviolet photocatalytic oxidation (photo-Fenton) treatment with actual chemical synthetic pharmaceutical wastewater as the treatment object. The results showed that at the initial pH of 2.0, light distance of 20 cm, and catalyst dosage and hydrogen peroxide concentration of 10.0 g/L and 0.5 mol/L respectively, the COD removal rate of wastewater reached 65% and BOD5/COD increased to 0.387 when the reaction lasted for 180 min. The results of gas chromatography-mass spectrometry (GC-MS) indicated that Fenton-like reaction with Fe-Mn-Cu@ATP had good catalytic potential and significant synergistic effect, and could remove almost all heterocycle compounds well. 3D-EEM (3D electron microscope) fluorescence spectra showed that the fluorescence intensity decreased significantly during catalytic degradation, and the UV humus-like and fulvic acid were effectively removed. The degradation efficiency of the nanocomposite only decreased by 5.8% after repeated use for 6 cycles. It seems appropriate to use this process as a pre-treatment for actual pharmaceutical wastewater to facilitate further biological treatment.

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“…44 It is noteworthy that the T-Ce 0.5 Zr 0.5 O 2 catalyst displays much stronger desorption peak (<300 °C) intensities than the P-Ce 0.5 Zr 0.5 O 2 and O-Ce 0.5 Zr 0.5 O 2 counterparts, which is associated to bicarbonate species as a result of the interaction of CO 2 and surface OH groups. 45 Besides, the T-Ce 0.5 Zr 0.5 O 2 catalyst also exhibits evident CO 2 desorption peaks with higher intensities in the region of 300−700 °C, which are attributed to the desorbed CO 2 molecules over the strongly basic sites. For the single CeO 2 and ZrO 2 catalysts, the catalysts do not show CO 2 desorption peaks with lower intensities than those of Ce 0.5 Zr 0.5 O 2 , indicating that Ce 0.5 Zr 0.5 O 2 leads to higher CO 2 adsorption ability (Figure S3).…”

Section: ■ Introductionmentioning

confidence: 96%

Conversion of CO₂ to Value-Added C₁ Products over Mesoporous Ceria–Zirconia Solid Solution with a Homogeneous Structure

Wang

Zhang

Zhou

et al. 2022

ACS Sustainable Chem. Eng.

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The Ce0.5Zr0.5O2 solid solution with a homogeneous structure is, respectively, modulated by a hard template strategy (P-Ce0.5Zr0.5O2), the ligand decomposition method (T-Ce0.5Zr0.5O2), and the co-precipitation method (O-Ce0.5Zr0.5O2) and employed in the CO2 conversion reaction. The different catalytic performances of Ce0.5Zr0.5O2 obtained are attributed to the homogeneity degree. The T-Ce0.5Zr0.5O2 catalyst with a complete homogeneous structure presents both higher CO2 conversion and CO selectivity in the range 250–450 °C than the P-Ce0.5Zr0.5O2 catalyst with a surface Ce-rich structure and the O-Ce0.5Zr0.5O2 catalyst with a surface Zr-rich structure. Interestingly, a larger number of oxygen vacancies are observed over the T-Ce0.5Zr0.5O2 catalyst, which leads to strong CO2 and H2 adsorption ability as well as fast regeneration of hydroxyl groups. In addition, the product formation mechanisms are discussed, as analyzed by high-pressure in situ diffused reflectance infrared Fourier transform spectroscopy, where CO is thought to be produced directly by the decomposition of monodentate formate, and CH3OH generation is observed to be inclined to proceed through the following reaction route: bicarbonates/carbonates → bidentate formate → methoxy → methanol.

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CO2 hydrogenation over acid-activated Attapulgite/Ce0.75Zr0.25O2 nanocomposite supported Cu-ZnO based catalysts

Cited by 13 publications

References 71 publications

Recent Advances in Carbon Dioxide Hydrogenation to Methanol via Heterogeneous Catalysis

Recent Advances in Carbon Dioxide Hydrogenation to Methanol via Heterogeneous Catalysis

Heterogeneous Photo-Fenton Catalytic Degradation of Practical Pharmaceutical Wastewater by Modified Attapulgite Supported Multi-Metal Oxides

Conversion of CO₂ to Value-Added C₁ Products over Mesoporous Ceria–Zirconia Solid Solution with a Homogeneous Structure

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CO2 hydrogenation over acid-activated Attapulgite/Ce0.75Zr0.25O2 nanocomposite supported Cu-ZnO based catalysts

Cited by 13 publications

References 71 publications

Recent Advances in Carbon Dioxide Hydrogenation to Methanol via Heterogeneous Catalysis

Recent Advances in Carbon Dioxide Hydrogenation to Methanol via Heterogeneous Catalysis

Heterogeneous Photo-Fenton Catalytic Degradation of Practical Pharmaceutical Wastewater by Modified Attapulgite Supported Multi-Metal Oxides

Conversion of CO2 to Value-Added C1 Products over Mesoporous Ceria–Zirconia Solid Solution with a Homogeneous Structure

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Conversion of CO₂ to Value-Added C₁ Products over Mesoporous Ceria–Zirconia Solid Solution with a Homogeneous Structure