FUEL
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2025
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IF 7.5
Yongpeng Ma,Jianghui Du,Yifei Wu,Haobing Yan,Ruiqi Liu,Xiaojing Zhang,Hongzhong Zhang,Liming Zhou,Wenjun Huang
Among the diverse pollutants emitted from coal-fired and non-ferrous metal smelting flue gas, Hg 0 and CO have emerged as globally concerning environmental pollutants. However, the simultaneous abatement of multiple pollutants remains a critical challenge to be addressed. In this study, cobalt nanoclusters (Co NCs) were anchored on the terminal oxygen of Ti-O on Ti 3 C 2 MXene and formed asymmetric oxygen vacancies Co-Ov-Ti via a one-step hydrothermal method, yielding Co NCs/Ti 3 C 2 MXene with a morphology of hierarchical nanosheet-assembled spheres for Hg 0 and CO catalytic oxidation. Co NCs/Ti 3 C 2 MXene exhibited excellent 44 % and 52 % of Hg 0 and CO simultaneous removal efficiency at the optimal temperature of 250 °C, respectively. DFT calculations combined with energy barrier modeling were employed to investigate the reaction pathways and energy variations during the catalytic oxidation of Hg 0 and CO. Specifically, Hg 0 oxidation follows the Eley-Rideal mechanism, with a rate-determining energy barrier of 2.11 eV, while CO oxidation adheres to the Langmuir-Hinshelwood mechanism, featuring a rate-determining barrier of 0.17 eV. In the co-catalytic oxidation process, competitive adsorption between Hg 0 and CO was observed, primarily manifested as competition for Ov on the catalyst surface. This study provides a novel strategy for the synergistic control of multi-pollutants in industrial flue gas.
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CATALYSIS TODAY
·
2026
·
IF 5.1
Nan Yang,Yaru Xue,Zehui Ma,Furang Li,Li Dong,Xiaoxuan Yin,Junhao Liu,Fei Wang,Jianye Fu,Xinmei Liu,Yuchao Lyu
The hydrodeoxygenation (HDO) of lignin-derived guaiacol offers an alternative to fossil-based routes for cyclohexanol production. However, the guaiacol HDO involves multiple parallel and sequential reactions, making the control of reaction pathways particularly challenging. In this work, Co-Zn-based HDO catalysts were synthesized using layered double hydroxide (LDH) as a precursor. The Co particle size decreases and electron density increases, while oxygen vacancy (Ov) concentration rises compared to monometallic Co, yielding higher activity and cyclohexanol selectivity. Most importantly, kinetic study reveals that electron density of Co plays a determining role in governing the HDO pathway. The guaiacol hydrogenation mainly follows two pathways over the Co-based catalyst: guaiacol → phenol → cyclohexanol (Pathway Ⅰ) and guaiacol → phenol → cyclohexanone → cyclohexanol (Pathway Ⅱ). Electron rich Co facilitates C aryl -OCH 3 bond cleavage of guaiacol to form phenol. It also selectively enhances adsorption and hydrogenation of aromatic ring while keeps the hydroxyl group intact as confirmed by the DFT calculations, favoring conversion of phenol to cyclohexanol (Pathway Ⅰ) rather than cyclohexanone (Pathway Ⅱ). These findings provide theoretical guidance for the rational catalyst design and regulation of reaction pathways in guaiacol hydrodeoxygenation.
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FUEL
·
2026
·
IF 7.5
Hang Zhang,Bo Yang,Shihao Zhao,Binbin He,Yun Zu
Cobalt-catalyzed propane dehydrogenation (PDH) has demonstrated considerable potential to surpass commercial Pt- and Cr-based catalysts, while achieving a balance between reactivity and stability remains challenge due to fickle Co speciations. Herein, two Co/SiBEA zeolite catalysts were designed under H 2 and Air atmosphere using dealuminated SiBEA as the support and cobalt(II) acetylacetonate as the precursor. The H 2 -derived catalyst featured the high-polymeric CoO x species onto the surface, delivering a high propylene space–time-yield (STY) of 228.9 kgC 3 H 6 ·kg Co −1 ·h −1 , but deactivated rapidly (k d = 0.175 h −1 ). In contrast, the Air-treated catalyst yielded low-polymeric CoO x clusters confined into zeolite channels, exhibiting remarkable stability (k d = 0.013 h −1 ) with a moderate STY of 156.9 kgC 3 H 6 ·kg Co −1 ·h −1 . Moreover, the catalyst maintained relatively stable operation for 50 h at 550 °C. Mechanistic studies further revealed that the high-polymeric CoO x species promoted hydrocarbon hydrogenolysis via Co-H phase, accelerating coke deposition, whereas the confined CoO x clusters effectively suppressed the formation of aromatic carbon precursors and facilitated propylene desorption. These findings offer a guideline for designing highly active and stable Co-based PDH catalysts.
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BIOCHEMICAL ENGINEERING JOURNAL
·
2026
·
IF 3.6
Rui Zhao,Wenhui Yang,Yunhan Cao,Haonan Zhu,Yiye Tu,Yingxue Yu,Fenghuan Wang
CA and FDH were respectively compartmentalized immobilized in different MOFs by self-assembly. • GDH was co-immobilized with FDH to facilitate in-situ cofactor regeneration. • The characterizations showed compartmentalized immobilized multi-enzyme was rationally constructed as designed. • This compartmentalized multi-enzyme system shows excellent CO 2 conversion efficiency. Multi-enzyme cascade systems provide an efficient route for CO₂ reduction and conversion into value-added products. Formate, as the first key product in CO₂ reduction, has attracted considerable interest. However, inefficient cofactor regeneration, limited enzyme stability, and mass-transfer constraints remain major challenges. Herein, a compartmentalized co-immobilized multi-enzyme system was rationally designed to enhance CO₂-to-formate conversion efficiency. Formate dehydrogenase (FDH) and glutamate dehydrogenase (GDH) were co-encapsulated within ZIF-L to enable localized cofactor regeneration and reduced diffusion resistance, while carbonic anhydrase (CA) was independently immobilized on DUiO-67 to facilitate CO₂ hydration and improve substrate availability. The two enzyme-loaded carriers were subsequently integrated via self-assembly strategy to construct a compartmentalized multi-enzyme cascade reactor. The resulting composite preserved the crystalline structure and morphology of the pristine carriers and exhibited a well-defined spatial distribution of CA, FDH, and GDH consistent with the design concept. The compartmentalized system achieved a significantly higher formate yield than free tri-enzyme systems and non-compartmentalized dual-enzyme immobilization. Compared with previously reported immobilized multienzyme platforms for CO₂ conversion, this strategy demonstrates superior catalytic efficiency. Moreover, the modular immobilized carrier coupled with cofactor regeneration is readily extendable to other cofactor-dependent redox cascade reactions, offering a scalable and cost-effective platform for CO₂ bioconversion. Download: Download high-res image (140KB) Download: Download full-size image
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CHEMICAL ENGINEERING JOURNAL
·
2026
·
IF 12.5
Yufei Yang,Yan Zhang,Chenying Zhou,Nuzahat Habibul,Peng Yan,Peng Zhou,Bo Lai
The sluggish reaction kinetics between H₂O₂ and Fe(III) significantly limit the practical application of the Fenton process. Although nitrogen-doped carbon materials (C N) can promote electron transfer and facilitate Fe(III) reduction, further enhancement of Fe(III)/Fe(II) redox cycling remains challenging. Herein, we propose a synergistic phosphorus and nitrogen co-doping strategy to overcome this limitation. By optimizing surface electronic structure and porous characteristics, the prepared nitrogen and phosphorus co-doped carbon (CN–P) markedly improved the reduction efficiency of Fe(III). Phosphorus incorporation modulates charge distribution, enhances electron transport capability, and increases the redox activity of surface Fe(III), thereby accelerating H₂O₂-induced Fe(III) reduction. The optimized CN–P–4 catalyst exhibited a pseudo-first-order rate constant ( k obs ) of 0.51 min −1 , which is 2.68 times higher than that of C N (0.19 min −1 ), demonstrating effective acceleration of the rate-determining step in the Fe(III)/Fe(II) cycle. Spectroscopic and electrochemical analyses confirm that the enhanced performance originates primarily from electronic structure regulation rather than surface area effects. Despite possessing only moderate specific surface area with predominant meso /macroporous features, CN–P achieved efficient pollutant degradation through enhanced hydroxyl radical (•OH) generation. Mechanistic studies reveal that highly active surface Fe(III) species can be readily reduced by H₂O₂ without external energy input, initiating a self-sustained Fenton chain reaction. This work provides mechanistic insight and a rational design strategy for developing efficient and sustainable Fenton co-catalysts.
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SYNTHETIC METALS
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2025
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IF 4.6
Ran Xu,Man He,Haoyuan Li,Shuangjiang Feng,Yongjuan Wang,Xiaohai Bu,Yuming Zhou
The strategy of customizing MOF-derived electromagnetic wave (EMW) absorbing materials through the construction of precursor size has become a new research direction. While exploring the dimensional adaptability of Co-MOF derivatives in graphene hybrid aerogel for electromagnetic wave absorption is not widely researched, manipulating the compositions and microstructures of EMW absorbing materials has been found to afford superior EMW absorption. Herein, a series of Co-N/C@graphene hybrid aerogel (CNGA) were successfully synthesized by integrating graphene and multi-scale Co-MOF derivatives which are derived from multi-scale Co-MOF precursors. The results displayed the CNGA containing nanoscale Co-MOF derivatives at a 20 wt% filler ratio exhibited the optimal reflection loss (−46.8 dB, 2.7 mm) and the maximum effective absorption bandwidth (5.3 GHz, 2.1 mm). The exceptional EMW absorption properties are credited to the collaborative impact of distinctive loss mechanisms benefited from the small particle size of Co-MOF derivatives in CNGA and appropriate filler ratio. This work demonstrates the correlations between the size of Co-MOF derivatives and electromagnetic parameters of CNGA, and provides a guidance for the development of advanced hybrid aerogel electromagnetic wave absorbing materials.
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ACS Catalysis
·
2018
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IF 11.384
Tian-yuan Chen,Junjie Su,Zhengpai Zhang,Chenxi Cao,Xu Wang,Rui Si,Xianglin Liu,Bianfang Shi,Jing Xu,Yi-Fan Han
CeO2 nanorods supported Co–CoOx catalysts showed high selectivity for higher alcohol synthesis (HAS) from syngas. The selectivity has found to increase with lowering the Co loadings, and the value over Co1/CeO2 (19.86%) is twice higher than that over Co5/CeO2 (8.67%). The active sites at the interfaces between Co0 and CoOx, or to say, Co–CoOx pairs, have evidenced to be responsible for HAS. The strong metal–support interactions between Co and CeO2 retard the reduction of CoOx and stabilize the intermediates such as CO–Coδ+. Likely, CO favors dissociating on the metallic Co surface to form CHx species, while CO is associatively activated on Coδ+ sites. Moreover, the structure evolution of the Co–CoOx interface was revealed during calcination, reduction, and reaction using in situ X-ray diffraction (XRD), in situ Raman spectroscopy, X-ray absorption spectroscopy (XAS), and in situ diffuse reflectance infrared fourier transform spectroscopy (CO-DRIFTS). The structure–performance relationship of HAS over Co/CeO2 was proposed.
研究领域:
催化化学
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材料科学
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化学工程
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无机化学
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Journal of Food Measurement and Characterization
·
2022
·Vol. 17
·期 2
·1662-1670
·
IF 3.006
Yang Zhengfei,Zhang Weijia,Zhu Jiangyu,Yin Yongqi,Xue Huaiguo,Fang Weiming
Detection and control of nitrite are major concerns in recent years for ensuring food and environmental safety. In this study, Mn, N co-doped Co-Carbons (CoMnN-Cs) were synthesized by calcination of bimetallic Co-Mn zeolite-imidazolate framework (CoMnZIF-67) materials at different temperatures (600–900 °C) in nitrogen atmosphere. Many characterizations, such as scanning electron microscope (SEM), elemental mapping, and, N 2 adsorption–desorption were performed to analyze the morphology, structure, and composition of the CoMnN-Cs. SEM revealed the generation of rich carbon nanotubes (CNTs). Mn-doping was obtained, which could be seen from the elemental mapping. The characterization also revealed that the pyrolysis temperature has an important effect to catalytic activities. From obtained results, it was found that the CoMnN-Cs prepared at 800 °C (CoMnN-Cs-800), showed better detection performance compared with CoMnN-Cs developed at other temperatures. As a result, the CoMnN-Cs-800-based sensor manifested an extended linear range (from 0.2 to 7000 μM), a low detection limit of 0.16 μM, and high sensitivity. Meanwhile, the developed sensor exhibited good selectivity, reproducibility, and long-term stability. Moreover, the sensor achieved satisfactory recoveries for the quantification of nitrite in tap water and sausage samples. This study implies CoMnN-Cs-800 is a promising material for the measurement of nitrite. Graphical abstract
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JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
·
2022
·
IF 6.364
Pingan Tan,Xu Huang,Jingsong Liu,Lijia Cao,Fei Yang,Chong Xian,Honglan Yuan
Y 2.5- x Bi 0.5 Al x Fe 5 O 12 (YIG-Al x ) ceramics have been synthesized at 1175 ℃ by the solid-state reaction method. The effects of the co-doped Bi 3+ , Al 3+ ions on the phases, micromorphology, and dielectric and magnetic properties of the yttrium iron garnets (YIG) were investigated. Excessive introduction of Al 3+ ions led to the collapse of the YIG lattice and precipitation of the Bi 3+ and Fe 3+ ions; while moderate Al 3+ doping improved the dielectric properties , but not the saturation magnetization. The YIG-Al 0.2 ceramics proved to have particularly good electromagnetic properties ( ε r = 18.34 ± 0.05@11.19 GHz, tan δ = 3.09 ± 0.55 × 10 −4 , M s = 19.82 ± 0.55 emu/g). Additionally, tightly bonded Y 2.3 Bi 0.5 Al 0.2 Fe 5 O 12 /Ni 0.8 Zn 0.2 Fe 2 O 4 (YIG-Al 0.2 /NZF) composite substrates were prepared by co-firing at 1175 ℃. The composite substrates exhibited superior electromagnetic properties (YIG-Al 0.2 : ε r = 18.37 ± 0.05@11.15 GHz, tan δ = 3.08 ± 0.55 × 10 −4 , M s = 21.09 ± 0.55 emu/g; NZF: M s = 67.5 ± 0.55 emu/g), which were slightly affected by the diffusion of Ni and Zn from the NZF. Our findings show that YIG-Al 0.2 /NZF substrates have great potential for use as RF band circulators.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2022
·
IF 9.965
Haiyan Zheng,Jun Zhong,Xinyan Liu,Ying Zhu,Baoshan Hou,Liang Zhao,Chunyi Sun,Xinlong Wang,Zhongmin Su
Rational design of high-performance bifunctional electrocatalysts to accelerate the sluggish oxygen reduction reactions (ORR) and oxygen evolution reactions (OER) in rechargeable Zn–air batteries remain an enduring challenge. The construction of multicomponent catalysts is a promising solution to achieve this goal. Herein, B and N co-doped interconnecting graphite carbon and carbon nanotube with the decoration of Co and vanadium nitride (VN) nanoparticles (Co/BN-CNT/VN) are synthesized using Co-modified polyoxovanadoborates as precursors. The optimized composite achieves superior bifunctional oxygen electrocatalytic activity and stability, which is comparable to noble metal catalysts and reported bifunctional electrocatalysts. Specifically, the half-potential of ORR reaches 0.85 V, and the overpotential of OER is low to 296 mV at a current density of 10 mA cm −2 . Strikingly, zinc–air batteries assembled based on Co/BN-CNT/VN demonstrate a small charge–discharge voltage gap of 0.873 V, a remarkable peak-power density of 156.3 mW cm −2 , and outstanding cycling durability (∼1000 cycles at 10 mA cm −2 ). This work affords a new alternative strategy to create cost-effective and high-potency bifunctional oxygen electrocatalysts for advanced air batteries.
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PubMed
高影响因子
APPLIED SURFACE SCIENCE
·
2021
·
IF 6.707
Jiaming Wang,Guilong Liu,Huixian Zhong,Pengfei Song,Kang An,Ziyang Zhang,Ang Cao,Yuan Liu
In this work, Co δ+ -Co 2 C decorated-Co-Ni alloy nanoparticles (NPs) loaded on Mg-Al-O complex oxides were fabricated via an in-situ reduction and topochemical carbonization strategy by using hydrotalcite as the precursor. The Co δ+ -Co 2 C decorated-Co-Ni alloys were obtained via the following process: (I) after reduction, Co-Ni alloy was obtained and Co could donate electrons to Ni in the Co-Ni alloy NPs; (II) in syngas atmosphere, some of cobalt atoms on the surface of Co-Ni NPs reacted with CO and were converted to Co 2 C. Resultantly, in the reaction process, Co-Ni alloy NPs were transformed into Ni-Co alloy@Co-Co 2 C, a core-shell structure with Ni-Co alloy core and Co-Co 2 C shell. When used as the catalysts for direct ethanol synthesis (DES) from syngas, the bimetallic Co-Ni alloy@Co-Co 2 C catalyst performed excellent selectivity to ethanol, owing to the regulation of dissociatively and associatively adsorbed CO by Co δ+ -Co 2 C active sites formed on the surface of Co-Ni alloy NPs. Moreover, the mutual dilution between Co and Ni in the Co-Ni alloy NPs inhibited the generation of heavy hydrocarbons, further improving the selectivity to alcohols. The total alcohol selectivity of 43.0% and ethanol occupied 45.2 wt% could be reached over the optimal catalyst.
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JOURNAL OF MOLECULAR STRUCTURE
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2021
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IF 3.196
Jingyan Zhu,Baolin Liu,Weibing Zhang,Jun Jiang,Xinhua Li
Single-molecule magnets in cobalt clusters is much less well known than it is in manganese(II)/(III)/(IV) clusters. To explore new types of cobalt clusters and their potential applications, a new mixed valence coordination polymer ([Co(III) 3 Co(II) 2 (mba) 6 (Hdtba) (H 2 O) 4 ] n , H 2 dtba=2,2’-dithiodibenzoic acid, H 2 mba=2-mercaptobenzoic acid) ( 1 ) is constructed by employing cobalt chloride hexahydrate and H 2 mba as starting reactants under hydrothermal conditions. Single-crystal XRD studies indicate that 1 consists of a trinuclear cobalt(III)-sulfur cluster moiety and two discrete cobalt(II) nodes, which result in the formation of a covalent three-dimensional complex network. Similarly, the cobalt(III) cluster moiety acts as a building unit in this infinite coordination polymer 1 instead of the discrete and tiara-like clusters previously reported in the literature. Magnetic studies show its slow magnetic relaxation in the absence of an applied dc field, which is characteristic behavior of single-ion magnets, caused by the individual Co(II) ions.
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