INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
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2026
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IF 9.2
Jianfei Ji,Zili Ma,Shaocheng Zhang,Chao Huang,Kegong Fang
The highly selective conversion of CO 2 -containing syngas to higher oxygenates (C 2+ OH), while achieving CO/CO 2 co-conversion, remains a fundamental challenge. In this work, we developed a series of multifunctional catalysts based on CoMn and ZnFe 2 O 4 with various coupling configurations. By precisely regulating the synergistic coupling of elementary reaction steps, we have successfully achieved the conversion of CO 2 -containing syngas while avoiding the removal of CO 2 . Specifically, the CoMn(up)|ZnFe 2 O 4 (down) catalyst achieved 32.2% and 14.8% of CO and CO 2 conversion, yielding 41.5% oxygenate selectivity with a C 2+ OH/ROH fraction of 91.2%. Furthermore, the catalyst exhibited exceptional stability over a 240 h continuous run. The study reveals that the suitable CO 2 concentration (<12%) promotes the formation of C 2+ oxygenates, whereas high CO 2 concentrations negatively affect the C–C coupling. Catalyst characterization and mechanistic studies demonstrate that a small amount of CO 2 enhances the formation of formate and carbonate intermediates on the catalyst surface. In CO/CO 2 hydrogenation, the multifunctional catalyst provides an additional pathway, in which the C–C coupling proceeds via the reaction between CH x ∗ alkyl species generated on the CoMn component and CH 3 O∗ methoxy intermediates formed on the ZnFe 2 O 4 catalyst surface.
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CHEMICAL ENGINEERING SCIENCE
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2026
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IF 5.1
Zhongshuang Xu,Chiyu Shen,Pengxu Yan,Xiaojing Zhang,Shuai Wang,Zhimao Yang,Chuncai Kong,Qikui Fan
Temperature is a key operating variable that governs both activity and selectivity in the electrochemical CO 2 reduction reaction (CO 2 RR). Here, we systematically elucidate the temperature-dependent behavior of a bismuth-based catalyst supported on carbon nanotubes (Bi-CNT) over a broad window of 303–343 K. The catalyst delivers a maximum Faradaic efficiency of 95% for formate at 318 K, accompanied by a high partial current density for formate of 285.6 mA cm −2 at a total current density of 300 mA cm −2 . By combining in-situ Raman spectroscopy with molecular dynamics simulations, we reveal that the moderate heating enhances formate selectivity through a cooperative increase in local alkalinity and a restructuring of the hydrogen‑bond network of interfacial water, which suppress the hydrogen evolution reaction. At elevated temperatures, the attenuation of local alkalinity and the growth of weakly hydrogen‑bonded water populations promote CO and H 2 formation, leading to diminished formate selectivity. These findings establish temperature‑mediated control of the interfacial microenvironment as an efficient strategy for robust, high‑rate CO 2 ‑to‑formate conversion under industrially relevant, thermally dynamic operating conditions.
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MICROPOROUS AND MESOPOROUS MATERIALS
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2026
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IF 4.5
Si Sun,Yijing Zhang,Ming Wang,Youhua Zhao,Zhehua Jia,Shenzhen Cong
Hydrogen (H 2 ) is a key feedstock for clean energy, and efficient separation of H 2 /CO 2 is an important link. To solve classic ZIF-8 membrane difficulties, such as long preparation times and weak binding force between crystals and supports, this work used an innovative gel-assisted in-situ growing approach. Specifically, a zinc-based gel was placed onto the PSf support and thermally activated, resulting in the creation of an ultra-thin dense membrane with a thickness of about 100 nm. The effects of reaction time and 2-MIM concentration on membrane performance were thoroughly examined. The results showed that the 0.8-ZIF-8-40 membrane had the best separation performance. The resulting 0.8-ZIF-8-40 membrane exhibited an H 2 permeance of 2200 GPU and an H 2 /CO 2 selectivity of 33, surpassing the Robeson upper bound (2008). Furthermore, the membrane maintained good separation performance after 60 h of continuous operation.
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Journal of Materials Chemistry A
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2026
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IF 9.2
Wenlong Yang,Zhenghui Ma,Guoli Fan,Xiaoyan Pu,Feng Li
Photocatalytic CO2 reduction to produce high value-added hydrocarbons has attracted significant attention, yet its overall efficiency remains unsatisfactory. In this work, a micro-liquid film reactor featuring enhanced mixing efficiency was utilized to realize the doping of single Fe atoms into the lattice of TiO2, enabling the generation of abundant atomically dispersed Feδ+ -Ov-Ti structures (Ov: oxygen vacancy). The results showed that compared to pristine TiO2, the optimized Fe-TiO2 photocatalyst bearing a 4 wt.% Fe content exhibited 15.2 times higher activity, with a significant shift in the predominant product from CO to CH4, as well as an impressively high CH4 formation rate of 29.2 μmol•g-1•h-1 , surpassing those over most of the state-of-the-art TiO2-based photocatalysts previously reported. It was revealed that the incorporation of single-atom Fe could reduce the bandgap of TiO2 matrix and surface atomically dispersed Feδ+ -Ov structures could improve the separation efficiency of photogenerated charge carriers and facilitated the adsorption and activation of CO2 and the formation and stabilization of key *CO reaction intermediate, thereby accelerating photocatalytic CO2 reduction to produce CH4. The present work affords a simple and efficient strategy for designing single-atom Fe-regulated TiO2-based photocatalysts for a synergistic enhancement of CO2 photoreduction activity and CH4 selectivity.
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Polymers
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2026
·Vol. 18
·期 6
·740
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IF 5.8
Jin Li,Zhongyong Su,Tiantian Jia,Kai Liu,Liulian Huang,Fang Huang,Xiaolin Luo,Jianguo Li,Qingxian Miao
It is essential to develop a practical technology for the separation and capture of carbon dioxide (CO2) due to the gradually increased concentration of CO2in the atmosphere, which has driven the rise in global temperature. Membrane separation is regarded as a promising technology for the capture of CO2. However, most membranes employ non-biodegradable petroleum-based polymers. In this study, biodegradable and renewable membranes of cellulose acetate (CA) doped with polyethylene glycol (PEG) and polyethylene glycol diacrylate (PEGDA) were fabricated by solution casting and used for the separation of CO2/O2. The results indicated that the membrane doped with PEGDA exhibited higher permeability of CO2and selectivity of CO2/O2compared to those doped with PEG, while improving the tensile strain and structural uniformity of membranes. The membrane with a thickness of 25 μm at a PEGDA dosage of 10 wt% achieved optimal gas permeability, selectivity, and mechanical toughness, showing CO2permeability of 4.59Barrerand CO2/O2selectivity of 5.68. The structure of the interpenetrating polymer network was responsible for the excellent properties of the membrane doped with PEGDA due to the formation of more mid- and micro-sized pores that increase the diffusion pathways of CO2.
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PubMed
高影响因子
RESEARCH ON CHEMICAL INTERMEDIATES
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2026
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IF 3.3
Wang Jiajun,Miao Yuanyuan,Wang Peng,Tao Xiaoxia,Bo Fan,Xu Yunzhao,Zhao Lingling,Zhang Caihang,Chen Yang,Tan Li,Tsubaki Noritatsu
For the industrially promising reaction of CO 2 hydrogenation toward methanol, Cu/Zn/Al-based catalysts present a potential candidate, where the surface active structure dictates the catalytic performance, guiding ongoing research into structure–activity relationships. Herein, a series of CuZn x Al y (where the mol ratio of Zn/Cu = x , mol ratio of Al/Cu = y ) catalysts with varying compositions was synthesized via a coprecipitation method. Physicochemical characterization revealed that a small amount of Al (CuZn 0.56 Al 0.04 ) enhanced the specific surface area, improved the dispersion of Cu and Zn species, and optimized the Cu + /Cu 0 ratio, as evidenced by N 2 physisorption, XRD, and XPS analyses. In contrast, excessive Al content (CuZn 0.23 Al 0.83 ) led to a decline in surface area, pore volume, and surface exposure of active Cu and Zn species. Catalytic performance tests showed that CuZn 0.56 Al 0.04 achieved the highest CO 2 conversion (16.2%), methanol selectivity (56.3%), and methanol space–time yield (STY) (438 g MeOH kg cat −1 h −1 ), outperforming that of the commercial CuZnAl catalyst. In situ DRIFTS studies confirmed that methanol synthesis proceeded via a formate (HCOO) mediated pathway, with the optimal catalyst demonstrating superior efficiency in converting key intermediates (HCO 3 *, CO 3 *, HCOO*) to the final product. The study establishes that tailored Al content is crucial for modulating catalyst surface properties and ultimately promoting catalytic performance for methanol synthesis from CO 2 . Graphical abstract An optimal Al content in co-precipitated CuZn x Al y catalysts optimizes the surface active structure, enabling efficient CO 2 -to-methanol hydrogenation via the formate pathway.
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JOURNAL OF CATALYSIS
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2026
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IF 6
Xinyi Yang,Yong Zhang,Yuxuan Wang,Yanyun Kang,Yiran Guo,Jianing Xu,Nianwen Song,Xinghua Zhang,Zunming Lu,Hong Dong,Feng Lu,Weihua Wang,Hui Liu,Hui Liu,Yahui Cheng
Achieving highly selective CO synthesis at near-ampere current densities (>500 mA cm −2 ) is pivotal for the industrialization of the electrochemical CO 2 reduction reaction (ECO 2 RR). However, the intrinsic low solubility of CO 2 and sluggish mass transfer kinetics fail to sustain rapid CO generation, which hinders the attainment of high current densities and renders traditional active-site regulation strategies ineffective. Thus, enhancing local CO 2 concentration and optimizing mass transfer has emerged as an urgent prerequisite for developing high-performance ECO 2 RR catalysts. To address this unmet need, we rationally designed a novel catalyst by immobilizing molecularly dispersed cobalt phthalocyanine (CoPc) onto hollow carbon spheres with tailored porous architectures. The confinement effect of the hollow porous structure boosts local concentrations of CO 2 and reaction intermediates, while structural engineering of pore parameters optimizes mass transfer efficiency and balances the density of active sites. Molecular dynamics simulations reveal that enlarging pore diameter and shortening pore length modulate the flow rate and distribution of CO 2 and electrolyte, accelerating reactant transport to active sites and promoting rapid product desorption, thereby facilitating mass transfer. Ultimately, these structural optimizations enable a CO Faradaic efficiency exceeding 92% at a near-ampere-level current densities of 800 mA cm −2 , and a turnover frequency as high as 86 s −1 , along with robust performance over a wide current density range of 100–800 mA cm −2 , outperforming state-of-the-art ECO 2 RR catalysts. This work provides a feasible mass transfer regulation strategy, offering new insights for improving ECO 2 RR current density and product selectivity, and laying a foundation for the industrial application of ECO 2 RR.
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CHEMICAL ENGINEERING JOURNAL
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2026
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IF 12.5
Wei Xiang,Jia Chen,Yunbo Dong,Yue Wen,Zizhao Wang,Lin Li,Caili Dai
Multilevel CO 2 -responsive polymers with exceptional thickening performance. • SC-CO 2 triggered cationic transformation and high-temperature ion pair formation. • Synergistic coupling mechanism of chain conformational changes and dynamic networks. • SC-CO 2 induced an 8.3-fold viscosity increase of 0.5 wt% PAAHD within 10 min. • PAAHD demonstrated exceptional CO 2 -blocking efficacy, EOR was 18.56%. Existing CO 2 channeling-control strategies that rely on a single protonation-triggered mechanism to regulate polymer conformation through hydrophilic-hydrophobic microdomain evolution are often severely constrained under harsh reservoir. Therefore, breaking away from the conventional single-response paradigm, this study synthesizes a multilevel CO 2 -responsive polymer, PAAHD. In a supercritical CO 2 (SC-CO 2 ) conditions, the viscosity of a 0.5 wt% PAAHD solution sharply increased from 68.31 ± 2.10 mPa·s to 665.37 ± 18.40 mPa·s within 10 min. Even under a high mineralization of 10 × 10 4 mg/L, the system maintained a viscosity of 254.66 ± 7.60 mPa·s, far exceeding the previously reported value of 55.40 mPa·s. This significant viscosity enhancement originates from the synergistic construction of a protonation-induced dense hydrogen bonding network (with hydrogen bonding content increasing from 16.65% to 54.08%) and an ionic crosslinking physical network. Specifically, the reversal of Zeta potential from −10 mV to +24 mV, accompanied by an order-of-magnitude increase in electrical conductivity, indicates the transition of polymer chains to a positively charged state and a significant increase in ionic crosslinking density. This pronounced gelation transition is reflected in core displacement experiments as a 32-fold increase in injection pressure and an 18.56 ± 1.20% enhancement in oil recovery. This dual-mechanism synergistic responsive strategy provides an innovative solution for intelligent profile control. Download: Download high-res image (350KB) Download: Download full-size image
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Nature Communications
·
2026
·
IF 18.1
Xia Shuai,Tan Hao,Zhang Jianfang,Han Miao,Xu Chang,Yu Cuiping,Chen Kui,Zhang Yong,Wu Yucheng,Wang Yan
The electrocatalytic synthesis of amides from abundant small molecules offers a sustainable route for green chemical production, yet faces fundamental challenges due to kinetic competition between C–C and C–N bond formation. Here we show an atomically engineered dual-site catalyst featuring nickel single atoms adjacent to copper nanoclusters (Ni-SA/Cu-NCs) on a nitrogen-doped carbon matrix for efficient CO 2 and NO 3 − co-reduction to acetamide. This architecture enables complementary functions, with Ni sites selectively converting CO 2 to CO and neighboring Cu nanoclusters promoting C–C coupling to form the *CCO intermediate while concurrently reducing NO 3 − to form the *NH 2 intermediate. The resulting synergy facilitates rapid intermediate transfer and C–N coupling, delivering an acetamide yield rate of 257.3 mmol h −1 g cat . −1 at an industrial current density of 215.7 mA cm −2 , with stable operation over 160 h. In situ spectroscopic studies and theoretical calculations suggest that strong Ni–Cu electronic coupling promotes reactant adsorption and reduces the activation barriers for critical steps, including *CO dimerization and *CCO–*NH 2 coupling. This work provides an atomic-level design strategy for multi-site catalysts to steer complex electrocatalytic reactions toward value-added products.
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CHEMICAL ENGINEERING JOURNAL
·
2026
·
IF 12.5
Dan Wu,Yanni Lang,Liang Xu,Qiyuexin Wang,Qiu Fu,Bingli Li,Xinye Zhao,Zhaoyi Yin,Yongjin Li,Dacheng Zhou,Yangke Cun,Zhiguo Song,Yugeng Wen,Yong Yang,Jin Han,Jianbei Qiu
The circular dichroism (CD) signal of D-BiOBr/Bi 0.3 g flipped and intensified. • The nanosheets of D-BiOBr/Bi 0.3 g were arranged in a spiral (counterclockwise) manner, forming petal-shaped nanospheres. • 0.3 g D-BiOBr/Bi exhibits a CO production rate of 84.27 μmol・g −1 h −1 , 3.34 times the value of D-BiOBr and 4.00 times that of 0.3 g pristine BiOBr/Bi sample. • LSPR boosts the migration of spin−down polarized electrons and improves the separation efficiency of photogenerated electron−hole pairs. Chiral inorganic nanomaterials have shown considerable promise in photocatalysis, owing to their distinctive optical activity and asymmetric interfacial effects. Metallic bismuth (Bi) exhibits a localized surface plasmon resonance (LSPR) effect, which markedly enhances both the generation and separation efficiencies of photogenerated electron-hole pairs. By employing D-sorbitol as a chiral inducer, we successfully synthesized chiral D-BiOBr/Bi nanocomposites. We propose that the synergistic integration of metallic Bi and chiral BiOBr enables effective modulation of chirality-induced spin selectivity (CISS), thereby enhancing spin polarization and promoting CO production from CO 2 reduction. Among the prepared samples, D-BiOBr/Bi 0.3 g exhibited the highest photocatalytic CO 2 reduction activity, selectively converting CO 2 to CO. The CO production rate of D-BiOBr/Bi 0.3 g was 84.27 μmol g −1 h −1 , which was 4.00 times and 3.34 times that of BiOBr/Bi 0.3 g and D-BiOBr respectively. Furthermore, magnetic conductive atomic force microscopy (Mc-AFM) measurements revealed that D-BiOBr/Bi 0.3 g generated the strongest tunneling current with an opposite polarity compared to its controls, providing indirect evidence for CISS-associated spin-selective charge transport. Collectively, our findings demonstrate a strong coupling between the LSPR of metallic Bi and structural chirality, which cooperatively boosts spin-polarized electron generation, accelerates electron-hole pair separation, and significantly improves photocatalytic CO 2 reduction performance.
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SEPARATION AND PURIFICATION TECHNOLOGY
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2026
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IF 9.1
Zhongmin Feng,Zheng Wang,Li-hua Qi,Sijie Yun,Chuang Zu,Ling Huang,Shengping Wang,Huanting Wang
Gas separation using metal organic framework (MOF) membranes has attracted considerable attention in recent years. Despite the progress made, establishing thin, defect-free MOF layers within the porous polymer remains a significant challenge. In this study, a novel approach is reported for the preparation of ZIF-8/Polyethersulfone (ZIF-8/PES) composite membranes via non-solvent-induced phase separation (NIPS)-triggered in-situ crystallization strategy. In this method, PES serves as a solid solvent for Zn(NO 3 ) 2 . During the NIPS process, an asymmetric PES membrane with a skin layer, finger-like pores, and interconnected foam structures is formed. Concurrently, Zn(NO 3 ) 2 diffuses to the skin layer and reacts with 2-methylimidazole (2-MIM), yielding a dense ZIF-8 layer on the PES surface. The simultaneous nucleation and growth of ZIF-8 within the polymer create strong interfacial interactions at the organic-inorganic interface. These interactions improve the compatibility between ZIF-8 and the polymer matrix, reduce interfacial defects. As a result, the composite membrane exhibits enhanced mechanical stability. When the crystallization time is extended to 48 h, the thickness of the ZIF-8 layer reaches approximately 540 nm, and the membrane exhibits an H 2 /CO 2 selectivity of 72.3 ± 3.35 at 298 K. This study provides a facile and effective route for constructing thin MOF membranes on polymeric matrix for high-performance gas separation.
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JOURNAL OF APPLIED POLYMER SCIENCE
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2026
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IF 3.1
Zhao Li,Hongjing Liu,Xingyu Chen,Yuqing Zhou,Pengzhi Bei,Ying Zhang
The development of high-performance mixed-matrix membranes (MMMs) for CO 2 separation requires fillers that simultaneously offer molecular-sieving pathways and favorable interfacial compatibility. Here, ZIF-67 was grafted with a long-chain polyetheramine (M600) to yield ZIF-67-M600, which was then incorporated into a Pebax matrix to fabricate novel MMMs. Comprehensive characterization including FT-IR, XRD, SEM, DSC and TGA confirmed the successful grafting of M600 and the homogeneous dispersion of the filler within the polymer. The microporous framework of ZIF-67 provides size-selective transport channels, while the abundant ether groups in M600 enhance CO 2 affinity and facilitate its preferential diffusion. Gas permeation tests demonstrate that the 4 wt% ZIF-67-M600/Pebax membrane achieves a CO 2 permeability of 110.12 Barrer and a CO 2 /N 2 selectivity of 85.96°C at 30°C and 0.2 MPa, corresponding to increases of 65% and 61%, respectively, compared to the pristine Pebax membrane. This performance surpasses the 2008 Robeson upper bound, highlighting that surface grafting of MOFs with CO 2 -philic polymers is an effective strategy to concurrently boost permeability, selectivity, and interfacial adhesion in MMMs for advanced gas separation.
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