A copper-based sorbent with oxygen-vacancy defects from mechanochemical reduction for carbon disulfide absorption

Chen, Haipeng; Zhou, Shixue; Han, Zongying; Jiang, Yilin; Yu, Hao; Zhou, Xinpei; Jiang, Ruiqian; Liu, Xiaojing; Li, Xinyuan

doi:10.1039/c6ta07134a

Cited by 19 publications

(5 citation statements)

References 51 publications

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“…If a catalyst can provide active sites for the adsorption and activation of CO 2 and also activate H 2 molecule to specific H – or H + , the hydrogenation performance of CO 2 should improve. For CO 2 adsorption, introduction of a defective structure on a nanoscale catalyst should be desirable because this can decrease the coordination of metals facilitating gaseous molecules adsorption and activation. − As for the H 2 activation, an option is to utilize metal-based hydrogen storage material with lattice H – for hydrogenation. , The metal hydrides often have a high catalytic activity in the hydrogenation of ethene, synthesis of ammonia, and hydrogenation of organic liquids. − Using lattice H – as the hydrogen source for CO 2 hydrogenation is different to using molecular H 2 in traditional methods, which should exhibit new hydrogenation characteristics and be of importance for exploring efficient catalysis for CO 2 conversion.…”

Section: Introductionmentioning

confidence: 99%

MgH₂/Cu_xO Hydrogen Storage Composite with Defect-Rich Surfaces for Carbon Dioxide Hydrogenation

Chen

Liu

et al. 2019

ACS Appl. Mater. Interfaces

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Thermal conversion of CO 2 to value-added chemicals is challenging due to the extreme inertness of the CO 2 molecule and the low selectivity of products. We reported a defect-rich MgH 2 /Cu x O hydrogen storage composite from mechanochemical ball-milling for the catalytic hydrogenation of CO 2 to lower olefins. The defect-rich MgH 2 / Cu x O hydrogen storage composite achieves a C 2 = −C 4 = selectivity of 54.8% and a CO 2 conversion of 20.7% at 350 °C under a low H 2 /CO 2 ratio of 1:5, which increases the efficiency of H 2 utilization by offering lattice H − species for hydrogenation. Density functional theory calculations show that the defective structure of MgH 2 /Cu x O can promote CO 2 molecule adsorption and activation, while the electronic structure of MgH 2 is beneficial for offering lattice H − for CO 2 molecule hydrogenation. The lattice H − can combine the C site of CO 2 molecule to promote the formation of Mg formate, which can be further hydrogenated to lower olefins under a low H − concentration. This work for CO 2 conversion by a defect-rich MgH 2 / Cu x O hydrogen storage composite can inspire the catalysts design for the hydrogenation of CO 2 to lower olefins.

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Section: Introductionmentioning

confidence: 99%

MgH₂/Cu_xO Hydrogen Storage Composite with Defect-Rich Surfaces for Carbon Dioxide Hydrogenation

Chen

Liu

et al. 2019

ACS Appl. Mater. Interfaces

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“…173 Mechanical alloying leads to an increase in the defect structure of the materials, atomic-level structural disorder, and nanocrystalline particle boundaries, adding to the crystal-free energy. 174,175 At the same time, mechanochemical methods for the synthesis of defectenriched catalysts have the advantage of simplicity, versatility, and high efficiency. Unlike wet chemical methods that produce wastewater, it has the advantage of being environmentally friendly to produce and is a very promising alternative to the wet chemical synthesis of defect-enriched catalysts.…”

Section: Direct Synthesis Of Defect-rich Catalystsmentioning

confidence: 99%

Advancement of modification engineering in lean methane combustion catalysts based on defect chemistry

Qiu

Wang

et al. 2023

Catal. Sci. Technol.

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“…Mekanokimyasal parçalanma sonucunda CaO üzerinde oksijen boşluğunun oluşması elektriksel ve diğer birçok özellik dahil olmak üzere difüzyonla ilişkili birçok olayda kilit rol oynamaktadır [24]. Günümüzde gerçekleştirilen teorik ve deneysel çalışmalar metal oksit reaktivitesinin oksijen boşluğu ile ilişkili olduğunu göstermiştir [25].…”

Section: Gezegen Hareketli̇ Bi̇lyali Deği̇rmen (Planetary Ball Mill)unclassified

Kalsiyum oksit varlığında teknik hegzaklorosiklohegzan’nın mekanokimyasal parçalanması

Pelitli

Kurt

Canlı

2018

Gazi Üniversitesi Mühendislik-Mimarlık Fakültesi Dergisi

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Mechanochemical degradation has shown an excellent performance with CaO.  After 6 h milling of t-HCH, up to 99,7% was degraded.  Degradation process produces low molecular weight degradation products through dechlorination steps.Mechanochemical degradation is a potential alternative treatment method for the disposal of persistent organic pollutants (POPs). To illustrate this concept, degradation of technical hexachlorocyclohexane (t-HCH) by planetary ball mill with calcium oxide (CaO) was studied. The content of residual t-HCH amount at the end of the process was measured by Gas chromatography coupled electron capture detector (GC-μECD) and the dagradation efficiency was found %99.7 after 6 h milling. The intermediate products, such as pentachlorocyclohexene, tetrachlorobenzene, trichlorobenzene, dichlorobenzene and monochlorobenzene were detected by Headspace Gas Chromatography Mass Spectrometry (GC-MS) and the main degradation pathway was proposed. The results showed that the final products were amorphous carbon and waste soluble chlorine. CaO CaO T-HCHFigure A. Scheme of mechanochemical degradation processpolicyPurpose: The purpose of the study is to point out an effective mechanochemical degradation of t-HCH with CaO. Theory and Methods:The degradation studies were performed using an all-dimensional planetary ball mill (Pulverisette 6 premium line, Fritsch), equipped with two zirconium oxide jars of 150 ml. Parameters such as mass ratios, running time and rotational speed were determined by literature data. For organic fraction, samples were analyzed according to ISO 10382:2002 (GC-ECD, 6890N, Agilent Technologies, California, USA) and EPA 8270D (GC-MS, 6890N GC, 7697A MSD, Agilent Technologies, California, USA). And anions were analysed via suppressed ion chromatography following the standard methods 4110 B and 4530 using Ion Chromatograph (ICS-1000, Dionex, California, USA). Results:In the study, mechanochemical degradation results showed that t-HCH was degraded 99,7% after 6 h with the use of CaO as inexpensive reagent. The reason for this is thought to be Ca elements capture halogens released from the organic molecules which can react with organic compounds via several pathways to form inorganic materials. Conclusion:At the end of the study it has been shown that t-HCH is degraded by mechanochemical dechlorination using CaO without the need for additional heating. Therefore, mechanochemical degradation is potential process that can be used as an economical disposal method for t-HCH.

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A copper-based sorbent with oxygen-vacancy defects from mechanochemical reduction for carbon disulfide absorption

Abstract: Mechanochemical reduction of CuO can generate Ovacdefects on the particle surface and they act as trapping sites for CS2absorption.

Cited by 19 publications

References 51 publications

MgH₂/Cu_xO Hydrogen Storage Composite with Defect-Rich Surfaces for Carbon Dioxide Hydrogenation

MgH₂/Cu_xO Hydrogen Storage Composite with Defect-Rich Surfaces for Carbon Dioxide Hydrogenation

Advancement of modification engineering in lean methane combustion catalysts based on defect chemistry

Kalsiyum oksit varlığında teknik hegzaklorosiklohegzan’nın mekanokimyasal parçalanması

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A copper-based sorbent with oxygen-vacancy defects from mechanochemical reduction for carbon disulfide absorption

Abstract: Mechanochemical reduction of CuO can generate Ovacdefects on the particle surface and they act as trapping sites for CS2absorption.

Cited by 19 publications

References 51 publications

MgH2/CuxO Hydrogen Storage Composite with Defect-Rich Surfaces for Carbon Dioxide Hydrogenation

MgH2/CuxO Hydrogen Storage Composite with Defect-Rich Surfaces for Carbon Dioxide Hydrogenation

Advancement of modification engineering in lean methane combustion catalysts based on defect chemistry

Kalsiyum oksit varlığında teknik hegzaklorosiklohegzan’nın mekanokimyasal parçalanması

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MgH₂/Cu_xO Hydrogen Storage Composite with Defect-Rich Surfaces for Carbon Dioxide Hydrogenation

MgH₂/Cu_xO Hydrogen Storage Composite with Defect-Rich Surfaces for Carbon Dioxide Hydrogenation