Nanomaterials
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2026
·Vol. 16
·期 14
·872
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IF 4.8
Huiqing Dong,Siyu Huang,Haopeng Cui,Ziyi Zhang,Dongxu Zhou,Weikai Huang,Xiaodong Zhang,Zhongxiao Zhang,Jianqiu Lei,Ning Liu
The conversion of CO2into value-added chemicals using photothermal catalysis is an attractive approach for achieving carbon neutrality. However, the limited visible-light absorption and rapid charge carrier recombination of CeO2hinder its photothermal catalytic performance. Herein, a series of In2O3-modified CeO2(In2O3-CeO2) are fabricated from a Ce-BTC metal–organic framework (MOF) precursor and applied to photothermal CO2hydrogenation. This approach not only effectively modulates the pore structure but also generates abundant oxygen vacancies (Ov). As a result, CO2adsorption and activation, charge separation and photothermal catalytic performance over In2O3-CeO2are significantly enhanced. The 3% In2O3-CeO2(3% denotes amounts of In) composite catalyst exhibits the optimal catalytic performance with a CO yield of 92.35 mmol·g−1·h−1and a remarkable 100% selectivity. A mechanistic study reveals that the Ov-rich interface facilitates electron transfer and promotes CO2conversion through a CO2→ *COOH → *CO reaction pathway. This work provides an effective strategy for designing high-efficiency MOF-derived composites to achieve carbon utilization.
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Journal of Inorganic and Organometallic Polymers and Materials
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2026
·
IF 6
Wang Haixia,Sun Yilei,Liu Chuang,Meng Zeda D.,Oh Won-Chun
A series of graphene-modified copper–metal–organic framework composites (G-Cu-MOF-0.3, G-Cu-MOF-0.5, G-Cu-MOF-1) were fabricated via a solvothermal method. Structural characterizations verified that graphene was successfully composited without damaging the Cu-MOF crystalline framework, among the four materials, G-Cu-MOF-0.5 exhibits the largest specific surface area and pore size. Electrochemical results showed that G-Cu-MOF-0.5 displayed the best CO₂ electroreduction performance, with a current density of − 11 mA cm⁻², a double-layer capacitance (Cdl) of 4.97 mF cm⁻² and a Tafel slope value of 36.5 mV dec⁻¹. At − 1.5 V vs. RHE, the total Faradaic efficiency for CH₄ and CO reached 24% with stable operation over 12 h. Graphene modification significantly improves the conductivity, active site density, and structural stability of Cu-MOF, realizing efficient and controllable CO 2 conversion to C1 products. The hydrogen evolution reaction (HER) remains the dominant side reaction, and the Faradaic efficiency toward CH 4 is still moderate, leaving room for further selectivity optimization.This work provides a feasible strategy for designing MOF–carbon composites for electrocatalytic CO₂ reduction to methane.
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APPLIED CATALYSIS B-ENVIRONMENTAL
·
2026
·
IF 19.7
Di Li,Jing Yang,Hao Chen,Hongxin Guan,Sheng Chen,Qiang Li,Jingjing Duan
Matched, oriented and fast local proton and electron supply are vital for industrial-level eCO 2 RR. • Modifying Cu catalysts using conductive functionalized polymers, could finely modulate proton and electron transport. • Methyl groups repel water and confine CO 2 , *CO intermediates nearby Cu, suppress HER and augment carbon-carbon coupling. A b s t r a c t Electrocatalytic CO 2 reduction reaction (eCO 2 RR) is an effective solution for environmental and energy crises caused by excessive CO 2 emission, consisting of multiple proton-coupled electron transfer (PCET) steps. Especially, to achieve industrial-level current densities, oriented and fast proton and electron supply is critical while challenging due to hydrogen evolution by-reaction (by-HER). In this work, functionalized conductive polymers are utilized to modify the traditional Cu-based gas diffusion electrode (GDE) regulating both local electron and proton transport for eCO 2 RR. Among which, pyrrole-3-methyl (PPy-3-CH 3 ) modified Cu-GDE has achieved an excellent Faradaic efficiency for double-carbon (C 2 ) products above 80.0% in a wide working range of 300–600 mA cm −2 , due to its moderate activation energy barrier for electron and proton conduction. Specifically, the electron and proton transport via the facile Grotthuss mechanism, whose energy barriers are lower than the Vehicle mechanism. Furthermore, -CH 3 groups could repel water, confine CO 2 reactants and *CO intermediates nearby Cu catalytic sites, suppressing by-HER and augmenting carbon-carbon coupling. However, -COOH groups also act as proton hopping sites except -NH groups, increasing local protons and thus severe by-HER. This work underscores importance of matched local electron-proton supply for electrocatalysts during PCET mediated electrocatalytic reaction, facilitating their industrial success. Download: Download high-res image (247KB) Download: Download full-size image Fast, oriented and matched proton and electron supply is developed by modifying the cupper based electrocatalyst using conductive polymers with different functional groups at various positions, therefore, achieving an industrial-level process of electrochemical CO 2 reduction to multi-carbon products.
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SEPARATION AND PURIFICATION TECHNOLOGY
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2026
·
IF 9.1
Xuebi Du,Huan Zeng,Qi Gao,Chen Li,Yin Quan,Lihua Chen,Shichao Feng,Yinhua Wan
In this study, the morphology of ZnO was altered from nanofibers to hollow nanotubes by Ce doping, mainly owing to the Kirkendall effect originating from different diffusion rates of constituent elements. A novel one-dimensional core-shell nanotube (ZnO-CeO 2 @ZIF-8) was successfully fabricated, characterized by a distinctive structure comprising a ZIF-8 shell and a ZnO-CeO 2 nanotube core. The as-prepared ZnO-CeO 2 @ZIF-8 exhibited a large specific surface area, substantial pore volume, and strong affinity towards CO 2 . These ZnO-CeO 2 @ZIF-8 were integrated into Pebax-1657 to construct MMMs for high-efficiency CO 2 transport and separation. Furthermore, the unique 1D hollow structure of the filler effectively reduced the resistance to mass transfer and enhanced gas permeability, while the ZIF-8 shell and Ce-induced oxygen vacancies synergistically enhanced the CO 2 adsorption and selectivity. The Pebax/ZnO-CeO 2 @ZIF-8 MMMs containing 3 wt% loading demonstrate superior performance, characterized by a CO 2 permeability of 94.0 Barrer and CO 2 /N 2 selectivity of 64.8 respectively. Compared to the unmodified Pebax, these values exhibit enhancements of 73.4% and 36.7%, suggesting that ZnO-CeO 2 @ZIF-8 holds considerable promise in the realm of MMMs for adsorption and separation of CO 2 .
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CHEMICAL ENGINEERING JOURNAL
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2026
·
IF 12.5
Luoqi Xie,Fei Liu,Shangyan Zhou,Jiamin Wang,Jinjin Sun,Zaiyin Hu
A Pd-MX/GaZnZrO x hybrid catalyst was developed for CO 2 hydrogenation. • MXene acts as a hydrogen-delivery platform beyond a conventional support. • Interfacial coupling promotes H 2 activation and CO 2 conversion synergistically. • A methanol STY of 600.2 mg gcat −1 h −1 was achieved at 320 °C. • DFT and DRIFTS confirm an accelerated formate-mediated pathway. Efficient CO 2 hydrogenation to methanol requires a balanced interface where CO 2 activation is coupled with H 2 dissociation and subsequent hydrogenation. Herein, a Pd-modified MXene (Pd-MX)/GaZnZrO x hybrid catalyst was developed by integrating Pd-modified MXene with Ga-modified ZnZrO x oxide to overcome the limited hydrogen activation ability of Cu-free oxide catalysts. In this architecture, Pd provides H 2 dissociation sites, GaZnZrOx contributes to CO 2 adsorption and activation through its surface oxygen-related sites, and promotes the formation and hydrogenation of formate- and methoxy-related intermediates. Under 320 °C, 3.0 MPa, H 2 /CO 2 = 4:1, and GHSV = 24,000 mL gcat −1 h −1 , Pd-MX/GaZnZrO x achieved 10.5% CO 2 conversion, 83.26% methanol selectivity, and a methanol space-time yield of 600.2 mg gcat −1 h −1 , outperforming GaZnZrOₓ and Pd/GaZnZrO x while maintaining stability over 100 h. Spectroscopic characterization and DFT calculations reveal that MXene coupling enriches electrons on Pd, facilitates H 2 activation, improves interfacial adsorption behavior, and stabilizes formate- and methoxy-related intermediates. These results support a contact-dependent Pd-MX/GaZnZrO x architecture that enhances H 2 activation and facilitates the hydrogenation of CO 2 -derived intermediates over the Cu-free oxide catalyst. Download: Download high-res image (153KB) Download: Download full-size image
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CHINESE JOURNAL OF CHEMICAL ENGINEERING
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2026
·
IF 3.5
Cai He,Bingfeng Guo,Tong Li,Xiaoxia Jia,Yong Wang,Zhiyun Xiao
A rigid–flexible Zn-DMOF was developed for selective C 2 H 2 /CO 2 separation. • Activation-induced pore contraction enabled dynamic recognition of C 2 H 2 . • Zn-chdc-DABCO retained high C 2 H 2 uptake but greatly improved C 2 H 2 /CO 2 selectivity. • Efficient breakthrough separation was maintained under varying flow rates and humidity. Separating C 2 H 2 from CO 2 is challenging because of their similar sizes and physicochemical properties. Adsorption-based separation using metal–organic frameworks (MOFs) offer a promising alternative. Here, a rigid–flexible framework strategy is used to introduce guest-discriminating dynamic recognition into a 1,4-diazabicyclo[2.2.2]octane (DABCO)-based MOF (DMOF) platform by replacing rigid 1,4-benzenedicarboxylate with flexible trans-1,4-cyclohexanedicarboxylate, affording Zn-trans-1,4-cyclohexanedicarboxylic acid (chdc)-DABCO. Activation induces pore contraction and generates a confined environment that selectively strengthens C 2 H 2 binding while leaving CO 2 largely unaffected. As a result, Zn-chdc-DABCO preserves a C 2 H 2 uptake comparable to that of Zn-DMOF at 298 K and 100 kPa, yet displays markedly enhanced affinity toward C 2 H 2 , a distinct gate-opening response to C 2 H 2 , and little framework response toward CO 2 . The zero-coverage isosteric heat of adsorption reaches 43.9 kJ·mol –1 for C 2 H 2 , substantially higher than that for CO 2 (29.3 kJ·mol –1 ), and the equimolar C 2 H 2 /CO 2 ideal adsorbed solution theory selectivity reaches 8.2, more than four times that of Zn-DMOF. Dynamic breakthrough experiments further confirm efficient separation under mixed-gas, variable-flow, and humid conditions. This work shows that rigid–flexible cooperative design offers an effective route to overcoming the capacity/selectivity trade-off in difficult gas separations. A rigid–flexible Zn-DMOF was engineered to enable activation-induced pore contraction and guest-discriminating dynamic recognition, thereby achieving enhanced selective C 2 H 2 /CO 2 separation with efficient C 2 H 2 recovery. Download: Download high-res image (204KB) Download: Download full-size image
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CHEMICAL ENGINEERING JOURNAL
·
2026
·
IF 12.5
Ziyang Xu,Huiduo Li,Zicheng Yang,Yi Feng,Jianfeng Yao
Air-induced self-reduction creates abundant coupled Mo 5+ –oxygen vacancy pairs. • Poisoning experiments identify Lewis acidic Mo ions as the true active centers. • Lamellar-stacked architecture exposes high-density active sites for CO 2 conversion. • The catalyst displays excellent cycling stability and broad substrate adaptability. CO 2 cycloaddition provides a sustainable and atom-economical route for CO 2 utilization, yet the development of high-performance molybdenum-based catalysts is hampered by poorly controllable defect modulation and ambiguous active-site origins. Herein, we report a facile air calcination strategy to fabricate lamellar-stacked defective molybdenum oxide (Mo-MOF-500/2h) from a rod-shaped Mo-MOF precursor. Air-induced pyrolysis enables the in-situ formation of abundant Mo 5+ species along with oxygen vacancies, fundamentally different from the isolated inert oxygen vacancies in conventional MoO 3 . Selective chemical poisoning experiments and kinetic analysis resolve the long-standing controversy regarding active sites in Mo-based cycloaddition catalysis, verifying that Lewis acidic Mo 5+ /Mo 6+ centers rather than surface hydroxyl groups dominate epoxide activation, while adjacent oxygen vacancies modulate paired Mo 5+ centers to lower the apparent activation barrier. As a result, Mo-MOF-500/2h achieves a high carbonate yield of 96% for CO 2 cycloaddition with epichlorohydrin within 6 h at 80 °C under atmospheric CO 2 pressure, accompanied by good substrate adaptability and excellent long-term cycling durability. This work clarifies the morphology–defect–activity correlation of molybdenum oxides and provides feasible guidance for the design of high-efficiency CO 2 fixation catalysts. Download: Download high-res image (221KB) Download: Download full-size image
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ACS Sustainable Chemistry & Engineering
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2026
·
IF 7.6
Wang Hongsheng,Zeng Yue,Lyu Shuai,Xiao Ping,Hadizadeh Mohammad Hassan,Wang Shan,Zhu Junjiang
Cu−Co bimetallic catalysts have demonstrated considerable potential for CO 2 hydrogenation to C 2 + alcohols. However, their practical application remains constrained by excessive CH 4 formation arising from the uncontrolled reduction of Co species under reaction conditions. Herein, we report a semi-encapsulated catalyst architecture constructed through a lattice-mismatching strategy. The lattice mismatch between hexagonal CoO (h-CoO) and ZnO is only 0.18%, whereas that between Cu 2 O and ZnO reaches 31.4%. When ZnO serves as the seed crystal, Cu 2 O preferentially nucleates and grows into nanoparticles on the ZnO surface, while h-CoO undergoes epitaxial growth on the exposed ZnO regions, forming a semi-encapsulated configuration in which Cu 2 O nanoparticles are partially confined by an h-CoO overlayer. The strong lattice matching between h-CoO and ZnO stabilizes Co species in an oxidized state under reaction conditions, thereby suppressing the formation of metallic Co and CH 4 production. Meanwhile, the confinement effect imposed by the h-CoO overlayer effectively restricts Cu migration, preserving the Cu−Co interfacial sites that are critical for C−C coupling. As a result, the optimized catalyst achieves a C 2 + alcohol selectivity of 63.7% at 300 ° C, with an ethanol selectivity of 30.0%, and exhibits no noticeable deactivation over 200 h of continuous operation. This work demonstrates that lattice-matching-directed interfacial engineering represents an effective strategy for simultaneously regulating active-phase stability and metal dispersion, offering new insights into the rational design of catalysts for selective CO 2 hydrogenation to C 2 + alcohols.
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SEPARATION AND PURIFICATION TECHNOLOGY
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2026
·
IF 9.1
Shumei Li,Yijie Wang,Yameng Wang,Maobin Wei,Xin Li,Binrong Li,Lili Yang
All-inorganic CsPbBr 3 perovskite quantum dots (QDs) are promising photocatalysts for CO 2 reduction, but their application is limited by aggregation and photoinduced instability. Herein, a 2D/0D BiOBr/CsPbBr 3 S-scheme heterojunction was constructed by anchoring CsPbBr 3 QDs on BiOBr nanosheets. The 2D BiOBr support promotes uniform QD dispersion and exposes more accessible active sites. More importantly, the intimate interface establishes an internal electric field that favors directional interfacial charge transfer in an S-scheme configuration. This pathway facilitates the depletion of photogenerated holes from CsPbBr 3 while retaining strongly reductive electrons for CO 2 conversion, thereby improving charge separation and contributing to enhanced photostability. The optimized composite delivers CO and CH 4 evolution rates of 170.4 and 33.0 μmol g −1 h −1 , respectively, corresponding to 3.8- and 3.2-fold increases over pristine CsPbBr 3 QDs, together with improved cycling stability. XPS, UPS, KPFM, photoelectrochemical measurements, in situ FTIR spectroscopy, and DFT calculations collectively support the S-scheme mechanism and reveal a lower Gibbs free-energy requirement for COOH* formation. These synergistic effects account for the enhanced photocatalytic activity and stability. Download: Download high-res image (150KB) Download: Download full-size image
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APPLIED CATALYSIS B-ENVIRONMENTAL
·
2026
·
IF 19.7
Yuehua Zhang,Jiyuan Zhang,Songrui Wang,Mingjin Yang,Xin Meng,Yun Zhao,Jiaxuan Liu,Yuqiong Kang,Shanshan Luo,Hao Du,Shuangyu Jiang,Wenglam Wong,Hongyi Kang,Dazhi Li,Baohua Li,Bing Li,Haiping Xu
In/C-0.2 achieves 93.5% Faradaic efficiency for formate at -0.6 V vs. RHE with 400 mV overpotential and 80 h operation. • Indium dispersion regulates CO 2 adsorption and electron transfer, enabling low-overpotential formate production. • TOF-SIMS combined with FT-IR reveals that In sites promote *OCHO formation and suppress competing pathways. • Electronegativity-driven charge polarization stabilizes O-bound *OCHO and facilitates highly selective formate formation. Electrochemical CO 2 reduction to formate is limited by high overpotentials and competing reactions. Herein, we report an indium single-atom catalyst that modulates the adsorption geometry of CO 2 by engineering the charge state of the active site. The optimized catalyst achieves a Faradaic efficiency (FE) for formate of 93.5% at −0.6 V vs. RHE in a flow cell with 400 mV overpotential and maintains high selectivity across a wide potential window (-0.6 to −0.9 V). The overpotential of formate is highly sensitive to the initial dispersion of In atoms causing optimal CO 2 adsorption and fast electron transfer, and increases significantly when In clusters/particles become predominant species. In situ characterizations and theoretical calculations indicate that oxygen-coordinated isolated In sites induce significant interfacial charge polarization, which preferentially stabilizes a bidentate O-bound adsorption configuration of CO 2 -derived intermediates through strong In-O interactions and thereby enables highly selective conversion to formate. This work identifies electronegativity as a key descriptor for controlling intermediate adsorption on p-block single-atom catalysts and provides insights into the rational design of selective CO 2 RR electrocatalysts. Download: Download high-res image (296KB) Download: Download full-size image
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Science Advances
·
2026
·Vol. 12
·期 31
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IF 13.9
Kun Li,Yuan Peng,Wentai Hu,Xinyu Wang,Weishen Yang
Carbon capture is essential for producing blue hydrogen and syngas. However, designing a single membrane with dual CO 2 -selective and H 2 -selective separations has long been considered impractical because these modes rely on fundamentally different mechanisms. We report a stimuli-responsive membrane that overcomes this limitation by integrating two functional materials. A zirconium metal-organic polyhedron (Zr-MOP) polymerized hydrogel membrane was fabricated via a stepwise molecular-level blending and polymerization strategy, achieving excellent filler dispersion, strong interfacial compatibility, and good solution processability. The Zr-MOP cages reinforce the hydrogel hydrogen-bond network, enabling high CO 2 -philic performance with a CO 2 /H 2 separation factor of 44 and CO 2 permeability of 7025 Barrer. Upon dehydration, membrane shrinkage induces cage rearrangement and exposure of molecular sieving windows, switching the separation behavior to a highly H 2 -selective mode with an H 2 /CO 2 separation factor of 798. This transition is reversible and can be further regulated by pH stimuli. This work introduces a strategy for membranes with switchable and inverted separation functions.
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Current Organocatalysis
·
2026
·Vol. 13
·期 2
·152-162
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IF 1.1
Guangyu Zhang,Ningkun Xu,Feng Sun,Bing Sun,Xinmei Liu,Wei Xu,Zhe Yang
Introduction The catalytic cycloaddition of CO2 with epoxides to produce cyclic carbonates represents one of the most promising CO2 utilization technologies, offering 100% atomic economy under mild conditions. Nevertheless, the development of cost-effective heterogeneous catalysts with high performance under solvent- and cocatalyst-free conditions remains a grand challenge. Herein, we report the rational design and synthesis of a multifunctional heterogeneous catalyst for efficient CO2/propylene oxide (PO) cycloaddition under solvent- and cocatalyst-free conditions. Methods The ZnMgAl-Br- heterogeneous catalyst was prepared through an integrated coprecipitation-ion exchange method. Structural and physicochemical properties were systematically characterized using SEM, XRD, EDX mapping, BET, and NH3-TPD, which confirmed the coexistence of abundant Br- nucleophiles and –OH hydrogen-bond donors within the layered matrix. Catalytic tests were conducted in a 50 mL stainless steel autoclave. Results A Br- intercalated ZnMgAl layered double hydroxide (ZnMgAl-Br-) catalyst was successfully constructed, integrating nucleophilic Br- anions with hydrogen-bond donating –OH groups in a precisely engineered layered framework. Under optimized conditions (140oC, 7 h, 2.5 MPa), the catalyst achieved 99.2% PO conversion, 98.7% PC selectivity, and 97.9% PC yield. The result represents a remarkable improvement compared with benchmark catalysts (MgAl-Br−: 50.5% yield; ZnMgAl-NO3−: 13.1% yield), highlighting the critical synergy among Br- nucleophiles, Zn species, and –OH groups. Discussion The results demonstrate that the cooperative interaction between Br- and –OH groups is central to the catalytic efficiency of CO2/PO cycloaddition. Incorporation of Zn species expanded the interlayer spacing and optimized the spatial arrangement of Br−/-OH sites, thereby enhancing cooperative catalysis. Conclusion The findings highlight the critical role of Br- nucleophiles and the Zn-modified layered structures in enabling cooperative catalysis. This work establishes a rational strategy for designing multifunctional heterogeneous catalysts for efficient CO2 utilization through epoxide cycloaddition.
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