Journal of Environmental Chemical Engineering
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2026
·Vol. 14
·期 2
·121733
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IF 7.5
Qing Yang,Yanmei Deng,Shuangjiang Li,Xiliang Li,Tingyan Ye,Yi Liu,Yunfei Zhi,Shaoyun Shan
The conversion of CO 2 into cyclic carbonates is crucial for achieving carbon neutrality and enabling resource recycling. Developing efficient heterogeneous catalysts from renewable biomass is a key direction in green catalysis. This study designed a green and efficient heterogeneous catalyst (MCA-PIL) by acetylating bamboo-derived cellulose to construct a porous cellulose acetate support, followed by immobilization of 1-methyl-3-allylimidazolium bromide. The catalyst was systematically characterized using FTIR, XPS, solid-state 13 C NMR etc., which confirmed its chemical structure, hierarchical porosity, and thermal stability. Under optimized conditions (120 ℃, 1.5 MPa CO 2 , 8 h), MCA‑PIL achieved a 99 % yield of chloropropene carbonate from CO 2 and epichlorohydrin without solvent or co-catalyst. The catalyst exhibited broad substrate scope across various epoxides and maintained high activity over five consecutive cycles. Kinetic studies indicated first-order reaction kinetics with an apparent activation energy of 48.35 kJ·mol −1 . Experimental and density functional theory (DFT) analyses revealed a synergistic three-step mechanism: cooperative activation of the epoxide and CO 2 by surface hydroxyl groups and the imidazolium ring, followed by Br - -induced ring-opening, CO 2 insertion, and cyclization to form the product with concurrent catalyst regeneration. This work provides new design principles for biomass‑based catalysts and demonstrates a synergistic strategy integrating CO 2 valorization with renewable material development.
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Inorganic Chemistry Frontiers
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2026
·
IF 6.2
siqing Wang,Yan Zhang,Pengda Xiang,Dawei Chen,Qiling Li,Zhiyan Guo,chen chen
Electrocatalytic urea synthesis from CO2 and NOx offers a sustainable route for chemical production and environmental remediation. While grain-boundary engineering has emerged as a promising strategy to accelerate the sluggish kinetics of C–N coupling, whether it can simultaneously regulate the reaction pathways of both carbon and nitrogencontaining molecules remains unclear. Hence, we employed single-active-site TiO2 as a model catalyst and constructed polycrystalline grain boundaries to boost both the activity and selectivity of urea synthesis. Atomic-scale structural inducers (Fe) served as nucleation nodes for grain-boundary formation and promote the generation of abundant oxygen vacancies, which captured and locally concentrated electrons to facilitate the adsorption, activation, and C−N coupling of key reaction intermediates. Operando electrochemical impedance spectroscopy demonstrated enhanced interfacial charge transfer and faster interfacial response frequencies. In situ infrared spectroscopy directly tracked the adsorption and activation of both reactants as well as the formation of the critical C–N bond. This work provides a general design principle for developing advanced electrocatalysts for efficient C–N coupling.
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Catalysis Science & Technology
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2026
·
IF 4
Kaiyang Lian,Fei Li,Lijuan Ma,Ranran Wu,Zhiguang Zhu
Glycine, the simplest amino acid with versatile physiological functions, is widely used in pharmaceuticals, animal feed, and the food industry. However, conventional production methods are limited by sustainability, safety, and environmental concerns. Here, we develop an efficient and green one-pot in vitro multi-enzyme cascade that converts oxalate into glycine under mild conditions. Upon optimization of the reaction conditions and integration of a cofactor recycling system, nearly complete conversion (100%) of oxalate to glycine was achieved in a 1-mL reaction system within 7 hours. After 4 hours of reaction in a 10 mL system, the glycine yield reached 95.7%, with a corresponding synthesis rate of 179.6 mg L-1 h-1. This work demonstrates that a C2-fixing multi-enzyme cascade circumvents the inherent challenge of C-C bond formation, achieving efficient conversion of CO2-derived oxalate to glycine, and presents a practical and conceptually innovative strategy for carbon-negative chemical synthesis.
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Chem Catalysis
·
2026
·
IF 10.7
Yunshuo Wu,Xiaole Weng,Haiqiang Wang,Zhongbiao Wu
CO 2 -assisted oxidative dehydrogenation of propane (CO 2 -ODHP) is a promising route for propylene production and CO 2 utilization, but catalyst sintering under harsh reaction and coke-burning conditions limits industrial deployment. Here, we report a practical regeneration strategy in which non-thermal H 2 plasma rapidly restores Au/MoS 2 catalysts that were deactivated by sintering at 600°C. The plasma treatment regioselectively reconstructs supported Au nanoparticles into raft-like Au domains enriched in unsaturated Au δ+ sites and stabilized by strong Au−S interactions, and this effect results in a 6.3-fold increase in propylene yield. The regenerated catalyst shows industrially relevant propylene productivity, high operational stability, and repeated regenerability. Mechanistic studies indicate that the Au rafts, electronically promoted by subsurface sulfur, facilitate propane C−H activation while accelerating hydrogen spillover and propylene desorption. These findings establish plasma-driven catalyst reconstruction as an effective regeneration strategy for light-alkane dehydrogenation and sustainable olefin production.
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Catalysis Science & Technology
·
2026
·
IF 4
Guoqing He,Yonghao Liang,Li Guo,Qianqian Zhang,Ying Xie,Zefan Hu,Jialing Chen,Xiaoqin Wu,Ran Zhang
Metal-organic frameworks (MOFs) exhibit promising catalytic potential for various reactions owing to their unique structure composed of designable metal-oxo clusters bridged by organic linkers, modifiable frameworks, and intrinsic porosity. Currently, defective MOFs are gaining considerable attention due to their accessible Lewis acid sites, tunable ligands, and superior performance compared with pristine MOFs. In this work, we have developed an amino-functionalized UiO-66 with ligand defects, denoted as UiO-66-DABAx (where x represents the molar percentage of 3,4-diaminobenzoic acid (DABA) relative to the total linker content), which enables an efficient pathway for the cycloaddition reaction of CO2 with epoxides under mild conditions. The increased density of Lewis acid sites and the presence of amino-functionalized ligands synergistically facilitate the ring-opening of epoxides and CO2 adsorption. Compared with pristine UiO-66, UiO-66-DABAx exhibits a stronger affinity for CO2. More importantly, UiO-66 modified with 20 mol% DABA (UiO-66-DABA20) exhibits optimal catalytic activity in the CO2 cycloaddition reaction, yielding a cyclic carbonate of 95%. This study paves a promising strategy for the chemical fixation of CO2 into cyclic carbonates using amino-functionalized defective UiO-66 as a potential heterogeneous catalyst under mild reaction conditions.
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Journal of Materials Chemistry A
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2026
·
IF 9.2
Shilin Wei,Weiqi Liu,Lang Xu
This study systematically investigates how lanthanoid elements and electromagnetic fields unite to enhance the performance of nickel-based catalysts in the electrocatalytic carbon dioxide reduction reaction. First, we synthesized and analyzed 14 lanthanoid-doped Ni nanoparticle catalysts. The results show that doping with lanthanoids effectively modulates the nickel electronic structure, raising the CO faradaic efficiency from 72.8% in the undoped case to generally over 90% for all lanthanoid-doped catalysts. Further research reveals that applying electric and magnetic fields produces an equivalent effect on current density: the higher the external magnetic or electric field strength, the higher the current density. Finally, the performance enhancements from both the internal factor, electronic structure modulation, and external factors, magnetic or electric fields, were found to be unified under one core idea – the promotion of charge-transfer processes. Consequently, this study presents unique perspectives on the unity in the diversity of factors governing the catalytic performance.
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Mineral Processing and Extractive Metallurgy Review
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2016
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IF 1.56
Zijian Su,Yuanbo Zhang,Bingbing Liu,Jun Chen,Guanghui Li,Tao Jiang
Calcite (CaCO3), one of the main impurities, has an uncertain effect on the volatilization behavior of tin oxide in the tin-bearing iron ore concentrates during the selective reduction volatilization process. In this study, natural calcite powders were added into the tin-bearing iron ore concentrates to investigate tin volatilization behavior affected by CaCO3 under different roasting temperature, CO content, and roasting time. In addition, the effect of CaCO3 on the phase transformation of SnO2 was determined using XRD, SEM-EDS combined with thermodynamics calculation. The results indicated that CaCO3 had a significantly adverse effect on the Sn volatilization ratio, because Ca2SnO4 was easily formed under CO-CO2 atmosphere. It was also found from the study that the generation of SnO(s) was the most critical intermediate for promoting the formation of Ca2SnO4.
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IEEE TRANSACTIONS ON ELECTRON DEVICES
·
2026
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IF 3.6
Zifan Li,Jiazheng Liu,Songquan Yang,Mingchao Yang,Chuanyu Han,Xin Li,Li Geng,Yubin Yuan,Weihua Liu
Atomic layer deposition (ALD) has emerged as an important technique for dielectric fabrication in single-walled carbon nanotube field-effect transistors (SWCNT FETs). Notably, intrinsic SWCNTs are chemically inert and lack sufficient nucleation sites for the ALD process, which limits both the minimum thickness and interface quality of the dielectric layer. In this work, a pretreatment of SWCNTs with supercritical CO2 (SCCO2) fluids is introduced before ALD to improve the deposition quality. The SCCO2 pretreatment SWCNTs (SC-SWCNTs) demonstrate an increased number of nucleation sites on the surface for ALD dielectric fabrication, thereby improving the quality of the deposited gate dielectric layer and effectively reducing the interface state density. The experimental results reveal that the SCCO2-pretreatment SWCNT FET (SC-SWCNT FET) has an enhanced breakdown voltage of the dielectric layer and a reduction in interface state density, accompanied by a two-order-of-magnitude enhancement in the current on/off ratio. The SCCO2 treatment demonstrates superior dielectric-SWCNTs interface modification capabilities, establishing a viable pathway for developing high-performance SWCNT FETs for next-generation nanoelectronics applications.
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APPLIED CATALYSIS B-ENVIRONMENTAL
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2026
·
IF 19.7
Yingtong Pan,Ruofan Li,Ling Zhang,Ji-Xuan Liu,Wenzhong Wang,Guo-Jun Zhang
Efficient conversion of dilute CO 2 into valuable products remains a significant challenge due to the low CO 2 concentrations (5–10%) in industrial flue gases, which are accompanied by inert gases and impurities. This results in low partial pressures, limited mass transfer, and dominant side reactions, undermining the efficiency and selectivity of CO 2 reduction reactions (CO 2 RR). To address this, we present a synergistic mechanochemistry–facet engineering strategy for efficient and selective CO 2 RR under ambient conditions using diluted CO 2 streams. By combining ultrasonic cavitation with mechanical stirring and exposing Cu 2 O (111) facets, the system achieves a CO yield of 1865.6 µmol g cat –1 , CO selectivity of 96.4%, and CO 2 conversion efficiency of 13.9% within one hour. These results surpass most previously reported systems for CO 2 reduction using low-concentration CO 2 streams. Mechanochemical activation enhances mass transfer and accelerates reaction kinetics, while facet engineering optimizes CO 2 adsorption and facilitates intermediate conversion. Density functional theory (DFT) calculations further reveal facet-dependent adsorption configurations and mechanochemical CO 2 RR pathways, clarifying the origins of the improved activity and selectivity. This approach provides a scalable solution for CO 2 conversion in low-concentration CO 2 environments, holding practical value in advancing industrial flue gas treatment and carbon capture and utilization (CCU) technologies.
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Molecular Catalysis
·
2026
·
IF 4.3
Chuang Yue,Qian Su,Yi Li,Ying Liu,Yifan Liu,Yunong Li,Zifeng Yang
In this work, a novel graphene-reinforced polyimidazole microsphere catalyst with dual functionality for both CO 2 adsorption and epoxide activation was successfully synthesized via one-step suspension polymerization strategy. This heterogeneous catalyst contained no halogens, effectively mitigating environmental pollution, equipment corrosion, and ensuring product quality. Specifically, graphene was strategically incorporated into the catalyst matrix during synthesis to enhance its thermal stability, and the thermal decomposition temperature has increased by 23 °C. Under optimized reaction conditions, the catalysts with high nitrogen content ( e.g. G-NCHSM-1) achieved the highest yield of cyclic carbonate (99 %) from the cycloaddition of epoxide and CO 2 . Notably, the graphene-reinforced polyimidazole catalyst exhibited favorable stability and potential for industrial applications. Finally, based on the experimental characterizations and density functional theory (DFT) calculations, a possible mechanism for the synthetic cyclic carbonate was proposed, elucidating the synergistic effect of the imine group and C β -H on the imidazole ring in catalyzing the synthesis of cyclic carbonates from CO 2 . Therein, the imine group could capture CO 2 and activate epoxides.
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SEPARATION AND PURIFICATION TECHNOLOGY
·
2026
·
IF 9.1
Yanan Li,Jiangnan Yu,Yu Jiang,Yang Liu,Jun Wang,Minxia Wang,Zhaomin Li,Xueqin Li
A dual transport channels network constructed within mixed matrix membranes (MMMs) has revealed the potential to enhance separation performance. In this study, Cu-TCPP(BA) nanosheets with unsaturated copper sites were synthesized as suitable fillers. Subsequently, Cu-TCPP(BA) nanosheets were incorporated into Pebax® MH 1657 (Pebax) to fabricate MMMs for CO 2 separation. Cu-TCPP(BA) nanosheets significantly enhance CO 2 /CH 4 separation performance by constructing dual transport pathways within the mixed matrix membrane. This mechanism centers on the dual pathways: on one hand, gas molecules can diffuse through the intrinsic microporous channels of the nanosheets; on the other hand, they can also be transported via the interlayer channels formed by the stacking of nanosheets. The synergistic effect of these two pathways collectively enhances the efficient permeation and selective sieving of CO 2 . Furthermore, the regularly aligned unsaturated copper sites on the nanosheet surface act as strong Lewis's acid active centers, preferentially adsorbing CO 2 molecules through quadrupole moment interactions, which provides the chemical basis for high separation selectivity. The adsorbed CO 2 then rapidly diffuses along the dual pathways, forming an “adsorption-diffusion” synergistic transport network. In comparison to pure Pebax membranes, the mixed matrix membranes (MMMs) infused with 3 wt% Cu-TCPP(BA) demonstrated excellent CO 2 separation performance, exhibiting a 77% enhancement in CO 2 permeability and a 44% improvement in CO 2 /CH 4 selectivity. The use of 2D fillers to create a dual transport channels network is an efficiency approach for enhancing CO 2 separation in MMMs.
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APPLIED CATALYSIS A-GENERAL
·
2026
·
IF 4.8
Siyu Yi,Guobin Zhou,Yi Wang,Mengxia Ji,Jinman Yang,Yi Zhang,Pengcheng Yan,Zhao Mo,Zhaolong Wang,Junjie Yuan,Hui Xu,Xiaojie She
Electrocatalytic CO 2 methanation is promising for carbon neutrality but hindered by complex multi-electron transfer process, thereby obtaining low product selectivity. Herein, we report a copper single atom catalyst anchored on nitrogen doped carbon nanotubes (Cu-N-CNTs) for efficient electrocatalytic CO 2 methanation. By synergistically regulating the precursor, Cu-N 4 active sites are precisely constructed at the atomic scale, effectively suppressing copper aggregation. In situ characterization indicates that the catalyst forms a moderate local alkaline microenvironment during the reaction, suppressing C-C coupling side reactions and promoting methane pathways. In the flow cell, Cu-N-CNTs achieve a FE CH4 of 59.2% and a partial current density of 168.7 mA cm −2 at −1.577 V vs. RHE, and operated stably for 10 h. Moreover, Cu-N-CNTs exhibit remarkable methane selectivity in membrane-electrode assembly (MEA) systems employing both alkaline and pure-water electrolytes. A scaled-up MEA prototype further verifies the outstanding operational stability of Cu-N-CNTs under practical conditions. These results collectively underscore the substantial potential of Cu-N-CNTs for industrially relevant electrocatalytic CO 2 methanation.
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