JOURNAL OF CATALYSIS
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2025
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IF 6.5
Jilei Lin,Meiqing Shen,Bowen Li,Gurong Shen,Yilin Wang,Xinhua Li,Liwei Jia,Feng Gao,Wei Li
The thermodynamic limitations of conventional propane dehydrogenation (PDH) have motivated the use of CO 2 as a mild oxidant to enhance reaction performance. However, on Pt-based catalysts that are renowned for their high C–H activation capacity, the introduction of CO 2 often leads to rapid catalyst deactivation. Here, we show that the primary cause of this deactivation is CO generated in situ via the reverse water–gas shift (RWGS) reaction. CO strongly adsorbs onto Pt active sites in PtIn/Al 2 O 3 , especially on isolated Pt atoms, with adsorption energies far exceeding those of propane. This preferential adsorption blocks propane from accessing active sites, suppressing dehydrogenation and reducing the number of available catalytic sites. Moreover, CO adsorption promotes Pt nanoparticle sintering, which increases coke deposition and facilitates side reactions, further accelerating deactivation. These findings provide mechanistic insights into the instability of Pt-based catalysts under CO 2 -assisted PDH (CO 2 -ODHP) and highlight the critical role of CO-induced surface effects in catalyst design and optimization.
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SEPARATION AND PURIFICATION TECHNOLOGY
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2025
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IF 9
Xupeng Fu,Wei Tian,Yuting Wang,Xionghui Wei,Zhaojun Wu,Jianbin Zhang
The influence of water content on the physicochemical properties of the H 2 O + (polyethylene glycol 300 (PEG300) + hydroxyethyl ethylenediamine (AEEA)) mixed system was investigated in detail. Density ( ρ ) and viscosity ( η ) were systematically measured over the temperature range of 298.15 K to 318.15 K under atmospheric pressure, and electrical conductivity was determined at 298.15 K. Based on the experimental data, excess molar volume ( V m E ), excess Gibbs free energy of activation for viscous flow ( ΔG ⁎E ), and viscosity deviation ( Δη ) were calculated to reveal the variations in intermolecular interactions. Subsequently, the formation of intermolecular hydrogen bonds, primarily characterized by H 2 O···HNH- interactions, had been further confirmed through spectroscopic analyses, including Fourier-transform infrared (FTIR) and Raman spectroscopy. The CO 2 absorption performance of different mixed system was systematically investigated under varying gas flow rates and water concentrations. The results demonstrated that the mixed system with higher water content exhibited optimal CO 2 absorption capacity at elevated gas flow rates, reaching a maximum absorption of 1.11 mol CO 2 /mol AEEA. Cyclic absorption experiments were further conducted, and graphic characterizations, including Raman spectroscopy, infrared spectroscopy, and 13 C NMR, were utilized to analyze the CO 2 absorption process of the H 2 O + (PEG300 + AEEA) mixed system over time. It was found that the byproducts N-hydroxyethyl-2-imidazolidinone (HEIA) and 3-(2-hydroxyethyl)-2-oxazolidinone (HEOD), formed during the cycles, were the primary contributors to the decline in absorption capacity. As the number of cycles increased, the mixed system gradually reached a new chemical equilibrium, with absorption performance stabilizing. These findings offered valuable theoretical insight for the optimization of absorbent systems.
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JOURNAL OF ALLOYS AND COMPOUNDS
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2025
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IF 6.3
Jing Fan,Shizhen Gao,Yanan Yang,Yuming Dong,Qi Qi,Fenhong Song,Jie Liu
As the world grapples with energy shortages and environmental challenges, photocatalytic CO 2 reduction has emerged as a game-changing solution in sustainable technology. By converting carbon dioxide into high-value hydrocarbon fuels, this innovative approach not only helps combat climate change but also paves the way for a cleaner, greener energy future. Developing high-performance, low-energy-consumption, and long-term stable photocatalysts remains a critical challenge in advancing sustainable technologies. In this study, the plate-like NiO supported ZnCdS nanoparticles with high stability is prepared by solvothermal method. Compared with ZnCdS and NiO, the photocatalytic properties of the composite materials are obviously improved. As a consequence, the 12NiO/ZnCdS composite exhibited CO evolution rates of 71.13 μmol·g -1 ·h -1 , 6.8 times higher than those of pristine ZnCdS. The selectivity toward CO reached 75%. Characterization results confirmed the successful synthesis of the catalyst, where the interfacial interaction between composite components formed a built-in electric field. This mechanism afforded more active sites, enhanced light absorption properties, and promoted carrier migration rate under photoexcitation. The efficient charge separation not only suppressed photo-corrosion but also enhanced the catalyst's reductive capacity for CO 2 reduction. This study establishes a novel design paradigm for engineering highly stable ZnCdS-based photocatalysts toward solar-driven CO 2 conversion, offering compelling inspiration for material innovation. Furthermore, the fundamental principles elucidated herein provide a valuable framework to guide future exploration in related energy-transduction technologies.
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JOURNAL OF ANALYTICAL AND APPLIED PYROLYSIS
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2025
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IF 6.2
Xianwei Cai,Weidong Ren,Chang Li,Qingyin Li,Xun Hu
The activation approach plays a critical role in determining the structural properties of activated carbon (AC). In this study, porous activated carbon was prepared from furfural residue through a combined physical-chemical activation using CO 2 and potassium oxalate as co-activators. The results revealed that CO 2 and K 2 C 2 O 4 had a synergistic effect that enhanced the activation efficiency. Compared to single activation, the co-activation markedly increased the specific surface area (1380 m 2 /g) of the resulting AC, although this came at the cost of a reduced solid yield. In addition, the co-activation process boosted the elimination of hydrogen and oxygen from the carbon material, thus impacting the surface functionality. The co-activated sample K 2 C 2 O 4 -CO 2 -800 exhibited superior adsorption performance for phenol, achieving a maximum removal rate of 95%, owing to its well-developed porous structure. Furthermore, it demonstrated good reusability, maintain a 74% removal rate after five cycles. These findings proposed that physical-chemical co-activation is an effective strategy for tuning the porous structure and improving the adsorption performance of activated carbon.
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FUEL
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2025
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IF 7.5
Haripal Singh Malhi,Bantayehu Uba Uge,Lenka Matějová
The selective hydrogenation of CO 2 to produce aromatics presents an intriguing approach for carbon utilization and the formation of high-value chemicals. This study presents a novel core–shell FeK@HZSM-5 catalyst, developed by cladding HZSM-5 zeolite onto a K-promoted Fe oxide core, to enable the direct conversion of CO 2 into aromatics. Under optimum reaction conditions (320 °C, 2.0 MPa, H 2 /CO 2 = 3), the FeK@HZSM-5 catalyst accomplishes 43.2 % selectivity for aromatics at 31.1 % conversion of CO 2 , outperforming the physically mixed FeK-HZSM-5 catalyst (aromatics selectivity: 31.8 %) while keeping CH 4 selectivity below 12 %. Mechanistic investigations reveal that the reaction follows a tandem RWGS-FTS pathway, with olefins serving as crucial intermediates. Robust interactions between Fe and zeolite enhance the stability of active Fe 5 C 2 phases and graphitic carbon, promoting olefin chain growth while inhibiting methanation. The appropriate density of Brønsted acid sites facilitates efficient aromatization, whereas an excess of acidity and increased shell thickness result in over-hydrocracking. The FeK@HZSM-5 catalyst exhibits a notable improvement in CO 2 adsorption capacity, attributed to the occurrence of increased oxygen vacancies and higher surface basicity, which facilitates effective CO 2 activation. The confinement effect of the zeolite shell further modulates intermediate diffusion and water retention. A FeK-to-HZSM-5 wt ratio of 1:2 provides the optimal structural and chemical balance. The catalyst exhibits remarkable stability after 100 h of operation with minimal coke deposition, emphasizing its promise for industrial CO 2 -to-aromatics conversion.
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Nature Communications
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2026
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IF 18.1
Cao Ningning,Chi Haowen,Chen Yuxin,Zhu Chen,Liu Tianji,Li Jiabao,Ma Yue,Zhu Bin,Wang Xueyang,Zhao Ke,Wang Zhenyu,Li Wei,Zhao Liang,Guan Dabo,Chen Jun,Zhu Jia
Reducing CO 2 emissions throughout a product’s life cycle, mainly encompassing four stages of raw materials extraction, processing, service, and end of life, is essential for carbon neutrality. Passive daytime radiative cooling coatings offer CO 2 reduction benefits, but primarily only during service stage. Life cycle assessment demonstrates maximized full life-cycle CO 2 reduction requires innovations in both raw materials extraction and service periods. Here, we develop a full life‑cycle carbon‑negative passive daytime radiative cooling coating, achieving 0.571 ~ 13.709 tons of CO 2 -equivalent reduction per ton over its lifespan across all climate zones compared to the commercial reflective cooling baseline, equivalent to planting 32 ~ 762 trees annually. The key to this is sodium dodecyl sulfate-induced hydromagnesite fillers, produced via scalable CO 2 mineral sequestration, which mitigate emissions in raw materials extraction stage. Moreover, the durable polyvinylidene fluoride resin envelops the above fillers with a hierarchical spherical-like structure, providing high optical characteristics and service stability, thus achieving service-stage emissions reduction. This work converges life cycle assessment, material design, and CO 2 mitigation technology, building a powerful platform for carbon-negative radiative cooling coatings and relevant materials, while also inspiring more advancement in sustainable technologies for resilient urban futures.
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PubMed
高影响因子
CHINESE JOURNAL OF CATALYSIS
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2026
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IF 17.2
Fuhao Yin,Qianyu Zhang,Mao Xu,Shupeng Wei,Yi Li,Pengzuo Chen,Yanying Zhao,Benxia Li
Achieving efficient photocatalytic CO 2 reduction using H 2 O as a hydrogen source requires the synergistic optimization of both charge and proton transfer between CO 2 reduction and H 2 O oxidation half-reactions. However, conventional studies mostly focused on enhancing these half-reactions independently, overlooking the intrinsic interdependence between them. Herein, this work develops a photothermal catalyst (denoted as Pd 1+c /3DOM-In 2 O 3 ) through engineering synergistic Pd single atoms (Pd 1 ) and Pd clusters (Pd c ) in three-dimensional ordered macroporous (3DOM) In 2 O 3 framework. The mechanistic study reveals that the coexistence of Pd single atoms and clusters not only offers synergistic active sites to promote the reaction of CO 2 and H 2 O, but also substantially improves the separation and transfer efficiencies of photogenerated electrons and holes. The Pd clusters facilitate H 2 O dissociation to ensure an adequate supply of active hydrogen species as well as synergistically enhance the adsorption and activation of CO 2 at Pd single-atom sites. Furthermore, the enhanced photoabsorption in visible and near-infrared regions, attributed to the localized surface plasmon resonance of Pd clusters, leads to a significant increase in catalyst temperature under simulated solar irradiation. The integration of photocatalysis with the photothermal effect affords an intensified driving force for the selective conversion of CO 2 and H 2 O into CO, thereby accelerating the reaction kinetics of the overall photocatalytic CO 2 reduction process. As a result, the Pd 1+c /3DOM-In 2 O 3 catalyst exhibits excellent performance for solar-driven CO 2 reduction with H 2 O vapor, achieving a remarkable CO production rate of 192.52 μmol g –1 h –1 , which is 19.8-fold and 12.2-fold higher than those of pure 3DOM-In 2 O 3 and Pd 1 /3DOM-In 2 O 3 , respectively. This study provides valuable insights into the synergistic effect of metal single atoms and clusters toward both efficient photocatalysis and photothermal effect for solar-driven CO 2 reduction.
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ACS Applied Energy Materials
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2026
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IF 5.5
Jie Li,Yongxiang Wang,Jingting Sun,Yong Dai,XiaoHua Cao,YongMing Luo,Xiaoping Xing,Kaige Chen
Photothermal CO2 hydrogenation harnesses light and heat synergistically to convert CO2 into value-added chemicals, representing an emerging pathway toward carbon-neutral energy systems. Layered MXene, with its large specific surface area and moderate conductivity, is ideal for enhancing photothermal performance. In this work, Ni nanoparticles (NPs) were loaded onto the MXene-derived TiO2 (MTiO2) surface via a hydrothermal method to synthesize Ni@MTiO2 composites with high photothermal CO2 methanation performance. The solar-light-driven methane (CH4) production of the 30Ni@MTiO2 catalyst was 66.03 mmol gcat–1 h–1, with a selectivity approaching 100%. The superior catalytic performance can be primarily attributed to the high dispersion of Ni NPs, the substantial concentration of oxygen vacancies, enhanced charge-carrier separation efficiency, and the robust adsorption capacity. This study provides a feasible strategy for synthesizing efficient photothermal CO2 methanation catalysts derived from MXene.
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FUEL
·
2024
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IF 6.7
Nanxin Zheng,Jingyi Zhu,Zhaozhong Yang,Yufeng Long,Liehui Zhang,Xiaogang Li,Jin Zhang,Huohai Yang
Hydraulic fracturing is an essential technique for extracting unconventional oils and gases. However, as unconventional oil and gas resources are extensively exploited, the high costs of traditional fracturing fluids have become increasingly apparent. In this study, a high-performance CO 2 -responsive VES-CO 2 foam fracturing fluid was developed by combining CO 2 foam fracturing fluid with viscoelastic surfactant (VES) fracturing fluid, based on responsive surfactants, to establish a recyclable fracturing fluid system stimulated and reduce operational costs. Firstly, a CO 2 -responsive VES-CO 2 foam fracturing fluid was constructed in a scCO 2 environment. Secondly, the stability mechanism of the CO 2 -responsive VES-CO 2 foam system was revealed through analysis of bulk rheological properties and interfacial characteristics. Finally, the performance of the fracturing fluid under high pressures was tested. The study found that under CO 2 stimulation, oleamidopropyl dimethylamine (DOAPA) forms a cationic surfactant, DOAPA-CO 2 , which, with the assistance of sodium benzenesulfonate (NaSbs), generates worm-like micelles . This transformation increases the zero-shear viscosity of the foaming solution from 12 mPa·s to 2869.69 mPa·s. The elastic modulus rises by two orders of magnitude, while the foam drainage half-life extends from 610 s to 3720 s. Encapsulation parameter P (P = 0.38) and TME tests confirmed the formation of worm-like micelles in the DOAPA@NaSbs-CO 2 system. Moreover, interfacial dilational rheology experiments indicated that the presence of worm-like micelles altered the relaxation mode of DOAPA-CO 2 molecules, enhancing the interfacial dilational viscoelasticity of the liquid film, thereby improving foam stability and the sand suspension capability of the liquid film. Performance evaluations showed that as the pressure increased, the proppant settling rate first decreased slowly and then rapidly, mainly because of the phase transition of CO 2 . Within the test range, the proppant settling rate stabilized below 2.4 cm/min, meeting the engineering requirements. By controlling the presence of CO 2 , the fracturing fluid can break its gel, and the foam viscosity can switch between low and high, providing conditions for recycling the fracturing fluid. Additionally, the damage rate of this CO 2 -responsive VES-CO 2 foam fracturing fluid was only 8.08 %, indicating its compatibility with formations and fractures.
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APPLIED CATALYSIS B-ENVIRONMENTAL
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2026
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IF 19.7
Xingyang Wu,Yucui Xiang,Miao Tian,Jing Lyu,Kexin Wang,Xiang Li,Haotian Song,Tao Zhang,Jiahao Qiu,Liyong Gan,Zhongkai Hao,Guo Qin Xu,John Hon Kay Yip
Photocatalytic CO 2 reduction in aqueous media represents a crucial route for solar-to-fuel conversion using water as the proton source. However, selectively driving multi-electron CO 2 reduction over the competing hydrogen evolution reaction (HER) remains challenging due to the complex proton-coupled electron transfer (PCET) reactions. Here, a hydrothermal approach is designed with in situ alkalization to anchor robust CuNi dual-atom sites on antioxidative hydroxyl-rich Ti 3 C 2 (OH) x MXene. The resulting Cu 1 Ni 1 /Ti 3 C 2 (OH) x catalyst achieves a high CO yield of 635.8 μmol·g −1 ·h −1 with 99.7 % selectivity and superior cycling stability, outperforming most reported MXene-based and diatomic-site catalysts. In situ spectroscopy and theoretical calculations reveal that Cu sites promote *COOH/*H formation and CO desorption, while Ni sites favor *COOH-to-*CO conversion and enhance water adsorption. This dual-atom synergy precisely regulates PCET at adjacent Cu and Ni sites, enabling HER suppression and enhanced CO generation. This work establishes a new paradigm for engineering stable MXene anchored dual-atom catalysts with site-specific functionalities for highly selective CO 2 photoreduction.
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CHEMICAL ENGINEERING SCIENCE
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2026
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IF 5.1
Qingping Xin,Nana Ren,Shangde Su,Dengdi Wu,Mengke Wang,Xingwei Wang,Jiaxin Wu,Wei Huang,Lantian Dong,Xiaoli Ding,Yuzhong Zhang
An ultrathin mixed-matrix composite membrane (MMCM) for efficient CO 2 separation is developed. A green bottom-up synthesis is employed to fabricate F-Ce two-dimensional nanosheets with a mesoporous structure and well-defined interlayer spacing. These nanosheets are incorporated into a Pebax 1657 polymer matrix to prepare a mixed-matrix coating solution. PDMS/PEI support membranes are fabricated by casting and subsequently modified by UVO 3 treatment to obtain hydrophilic PDMS(UVO 3 )/PEI supports. The Pebax-F-Ce coating solution is uniformly deposited onto the modified support surface to produce Pebax-F-Ce/PDMS(UVO 3 )/PEI composite membranes. The resulting membrane possesses an ultrathin separation layer (∼500 nm) and an intermediate layer (∼150 nm), enhancing gas transport while maintaining structural stability. Uniformly dispersed F-Ce nanosheets form mesoporous architectures that provide rapid CO 2 transport channels, while their −F functional groups enhance CO 2 solubility, further improving gas permeance. The 0.344 nm interlayer spacing provides a moderate size-exclusion effect on larger gas molecules, thereby contributing to improved CO 2 /N 2 selectivity. The high aspect ratio and rigidity of F-Ce nanosheets induce more tortuous diffusion pathways for bulky molecules, further enhancing separation efficiency. Comprehensive characterization (SEM, TEM, FT-IR, XRD, XPS, BET, and gas permeation) confirms excellent performance, showing a CO 2 permeance of 662 GPU and a CO 2 /N 2 selectivity of 59—representing 12% and 44% improvements over conventional Pebax/PDMS/PEI membranes, respectively. This study demonstrates that constructing an ultrathin separation layer and optimizing the composite structure significantly enhances the gas separation performance of MMCMs, providing an effective strategy for efficient CO 2 capture.
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Chem
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2026
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IF 19.1
Wen Wang,Xinyuan Zhao,Qi Li,Yue Zhang,Qifan Wang,Yao Xie,Fangyu Ren,Shengli Hou,Bin Zhao
The synthesis of asymmetric carbonates from renewable CO 2 is important for sustainable chemistry but often suffers from low efficiency, harsh reaction conditions, and noble metal catalysts. Achieving this efficient transformation under mild conditions by non-noble metal catalysts remains a great challenge. Herein, a framework {[In 3 ( μ 3 -O)(H 2 O)Cu 4 (CPT) 4 I 2 ]⋅(NO 3 )⋅1.5H 2 O⋅3DMF} n (CuIn-CPT, CPT = 3,5-bis(4′-carboxyphenyl)-1,2,4-triazole) was synthesized, assembled from a [Cu 12 In 18 ] nanocage with multiple Cu I and In III Lewis acid sites, and it exhibits good thermal and chemical stabilities. It achieves up to 98% yield in multicomponent reactions of CO 2 , propargyl alcohols, and primary alcohols without solvent under mild conditions, with a record turnover number of 4,844—ten times higher than top Ag-based catalysts—and excellent recyclability over 10 cycles. Density functional theory (DFT) calculations and mechanistic studies confirm that the synergistic effect between [Cu 4 ] and [In 3 ] clusters enhances catalytic efficiency. This work provides an inspiration for developing efficient non-noble metal heterogeneous catalysts in CO 2 conversion.
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