INORGANIC CHEMISTRY
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2018
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IF 4.7
Ming Zhong,Wei-Wei He,Wei Shuang,Ying-Ying Liu,Tong-Liang Hu,Xian-He Bu
Metal–organic frameworks (MOFs) with diverse structures, adjustable pore sizes, and high surface areas have exhibited awesome potential in many fields. Here we report a simple carbonization strategy to obtain a series of core–shell structured Co/Co3O4 nanoparticles encapsulated into nitrogen-doped carbon shells from cobalt-based metal–organic framework precursors at different carbonization temperatures. When it is applied as an anodes for lithium ion batteries, the Co/Co3O4@N-C-700 electrode delivers a maximum initial discharge capacity of 1535 mAh g–1, the highest reversible capacity (903 mAh g–1 at a current density of 100 mA g–1 after 100 cycles), and the best rate performance (i.e., 774 mAh g–1 at a current density of 1.0 A g–1 after 100 cycles) in comparison with those of Co/Co3O4@N-C-600 and Co/Co3O4@N-C-800 electrodes. The excellent electrochemical performance could be mainly attributed to the unique core–shell structure, abundant graphited carbon, and the well-dispersed Co/Co3O4 nanoparticles which can promote the specific capacity through conversion reactions.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
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2026
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IF 12.5
Jiawei Wang,Jiayu Gong,Liang Chen,Shuai Niu,Jing Zhang,Xiaoyue Li,Xu Wu
CeO 2 -Co 3 O 4 electrocatalyst is constructed via Hard-Soft-Acid-Base theory. • CeO 2 as hard acid prefers to OH − , while Co sites bind soft S-containing bases. • The catalyst exhibits a current density of 100 mA cm −2 at a potential of 0.31 V. • The HER||SOR system indicates the application potential of CeO 2 -Co 3 O 4 . Sulfide oxidation reaction (SOR) is not only a suitable substitution technology for anodic reaction in overall water splitting but also an emerging technology to replace conventional sulfide abatement strategies. However, the restricted adsorption/desorption process of key intermediates still limit the development of SOR. In this work, basic hard-soft-acid-base (HSAB) theory is employed to regulate the acid hardness of Co 3 O 4 to enhance the dynamic behavior of the key intermediates. Theoretical prediction results indicate the CeO 2 is the suitable hard acid carrier and then the CeO 2 -Co 3 O 4 is prepared via a one-step hydrothermal method followed by calcination. The optimized CeO 2 -Co 3 O 4 catalyst exhibits a current density of 100 mA cm −2 at a low potential of 0.31 V (vs. RHE) and outstanding long-term durability. A current density of 400 mA cm −2 is achieved at 1.13 V (70 °C) in two-electrode flow electrolysis of 0.5 M Na 2 S (HER||SOR). Detailed experimental and theoretical studies indicate the incorporation of CeO 2 creates hard Lewis-acidic sites that preferentially interact with OH − , while Co sites retain moderate affinity toward soft sulfur-containing bases such as HS − /polysulfides. This hard–soft acid-site cooperation not only facilitates the progression of the SOR reaction but also effectively inhibits sulfur accumulation at the cobalt active sites. Furthermore, several catalysts are also prepared based on HSAB theory and their enhanced SOR performances indicate the universality of HSAB theory. Download: Download high-res image (163KB) Download: Download full-size image
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FUEL
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2025
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IF 7.5
Suhong Lu,Nan Sun,Liwei Gong,Chengyu Xu,Rongrong Guo,Yiyao Li,Shuo Wang,Jurong Liu,Yuzhen Fang,Guilong Liu
Hollow urchin-like Co 3 O 4 -MnO 2 spheres were synthesized via hydrothermal method, followed by co-impregnation with 3 wt% Ag and K (3, 5, 7 wt%). The optimized Ag-5 K/Co 3 O 4 -MnO 2 catalyst achieved complete HCHO conversion at 50 °C under 150 ppm HCHO, 21 vol% O 2 /N 2 , RH = 30 %, and WHSV = 36,000 mL g cat -1 h −1 . Systematic parameter studies (0 ∼ 80 % RH, 50 ∼ 350 ppm HCHO, 5 ∼ 21 vol% O 2 , 36,000 ∼ 144,000 mL g cat -1 h −1 WHSV) demonstrated the robust catalytic performance of Ag-5 K/Co 3 O 4 -MnO 2 across wide operational ranges. Remarkably, Ag-5 K/Co 3 O 4 -MnO 2 demonstrated excellent stability and nearly 100 % HCHO conversion over a continuous period of 100 h with the WHSV of 36,000 mL g cat -1 h −1 . The hollow architecture enhanced reactant diffusion, while interconnected nanorod arrays provided abundant Ag/K anchoring sites. Potassium doping increased Ag/Ag + , (Mn 2+ + Mn 3+ )/Mn 4+ and Co 3+ /Co 2+ ratios via strengthened Ag-support interactions, promoting oxygen activation. Mechanistic analysis indicated HCHO oxidation proceeds via HCHO → DOM → HCOO – + OH – →CO 2 + H 2 O route.
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高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2020
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IF 3.99
Ziyin Yang,Xiao Bai
In this study, we described the facile synthesis of Au core flower surrounding with thin Co 3 O 4 shell for enhanced electrochemical sensing of H 2 O 2 . Such core-shell structure was obtained by employing Au 3+ to oxidize Co 2+ under alkaline conditions for triggering the redox assembly process. The experiment results revealed that conductive Au core flower was surrounded by thin Co 3 O 4 shell, and such structure not only accelerates electron transfer rate but also provides more effective active sites for H 2 O 2 reaction, therefore making the sensor based on Au@Co 3 O 4 exhibit an excellent performance for H 2 O 2 analysis with a linear range of 0.2 μM-7.1 mM, a high sensitivity of 722.4 μA mM −1 cm -2 and a low detection limit of 0.06 μM. The excellent experimental results implied that Au@Co 3 O 4 nanocomposite was a promising sensing material for electrochemical detection of H 2 O 2 .
研究领域:
材料科学
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电化学
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纳米技术
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传感器与生物传感器
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高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2026
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IF 9.6
Shiyi Huang,Hui Cao,Yongjun Lu,Fei-Fei Chen,Yan Yu
Developing efficient monolith catalysts for photocatalytic CO 2 reduction remains fundamentally challenging due to their inherently sluggish charge transfer. Herein, we report a Co 3 O 4 catalyst with serious agglomeration and meanwhile rich in oxygen vacancies (V O -r-Co 3 O 4 ), which achieves an unexpected superior photocatalytic CO evolution rate of 19.56 mmol h −1 g −1 . Experimental results and density functional theory (DFT) calculations reveal that V O play a crucial role in optimizing the CO 2 reduction pathway. Specifically, the abundant V O create a low-coordination environment around Co atoms, substantially weakening the Co O orbital hybridization. This directly induces a significant downshift of the Co 3 d -band center, effectively alleviating the overbinding of reaction intermediates. Consequently, the energy barriers for both the rate-determining *COOH formation and CO desorption are substantially reduced. This work highlights the importance of local electronic modulation in overcoming the charge transport limitations of monolith catalysts, offering a cost-effective strategy to revitalize such materials for solar energy conversion. Download: Download high-res image (146KB) Download: Download full-size image
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PubMed
高影响因子
NEW JOURNAL OF CHEMISTRY
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2025
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IF 2.5
Jiaxuan Wei,Yue Hou,Zhaodi Zhang,Shuangshuang He,Yufei Li,Yuanzhen Zhou,Kangkang Wang,Zhen Wang,Yuan Dang
The combination of photoelectrocatalysis and persulfate-based advanced oxidation processes (AOPs) offers a promising strategy for in-situ ROS generation in environmental remediation. In this study, a light-assisted electrocatalytic system using Co3O4-SnO2/NF as the cathode was developed. Applying a low current suppressed the recombination of photogenerated charges, facilitating continuous hole (h+) generation to activate PMS and produce ROS, enabling efficient degradation of tetracycline (TC). Under optimized conditions, the system exhibited excellent pH tolerance, maintaining a high degradation efficiency (92%-100%) across a wide pH range from 3 to 11, significantly outperforming traditional Fenton-like systems limited to acidic conditions. Furthermore, the light irradiation introduction increased the TOC removal rate of TC by 20% compared to the single electrocatalytic activation system. It enhanced TOC removal rated addressed the importance of the external light radiation during the mineralization of TC. Quenching and EPR analysis confirmed that 1O2, SO4·-, and h+ were the dominant ROS. Their efficient production was attributed to the Co3O4-SnO2 heterojunction, which promoted charge separation and accelerated electron transfer in the Co redox cycle. This research holds significant importance in the field of light-assisted electrocatalytic activation of PMS to enhance the generation of ROS for efficient pollutant degradation.
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高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2023
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IF 6.2
Jing Jiang,Jiayi Zhang,Baihao Wu,Sheng Tu
The regulation of the metal-support interaction in heterogeneous catalysts can promote the activation of reactants, which is beneficial for the hydrolytic dehydrogenation reaction. Herein, the hydrolytic dehydrogenation of dimethylamine borane (DMAB) is systematically studied on the oxygen vacancy (O v ) enriched Pt-Co 3 O 4 heterogeneous catalyst with the metal-support interaction. It is found that the metallic Pt site facilitates the adsorption of DMAB molecules and the O v on Co 3 O 4 support as an electron-rich center cooperates with the adjacent Pt site to dissociate water molecules. The in situ Raman and attenuated total reflectance (ATR)-Fourier transform infrared (FTIR) spectroscopy reveal the effective activation and cleavage of the O-H in water and the B-H in DMAB over the Pt-Co 3 O 4 catalyst. The optimal Pt-Co 3 O 4 catalyst exhibits the extraordinary activity for the catalytic hydrolysis of DMAB at 303 K, delivering a high specific hydrogen generation rate (64063 mL min −1 g pt −1 ) and a competitive turnover frequency (TOF, 23880 mol H2 mol Pt −1 h −1 ). This performance outperforms most of the reported heterogeneous catalysts for DMAB dehydrogenation . More importantly, the Pt-Co 3 O 4 catalyst achieves the desirable on-demand hydrogen production by using special chemical switches. This finding provides the fundamental understanding of metal-oxide systems with the collaborative interfacial catalysis for boosting DMAB dehydrogenation .
研究领域:
催化化学
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纳米材料科学
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能源化学
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表面科学
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多相催化
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氢能存储与释放
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高影响因子
ACS Applied Materials & Interfaces
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2023
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IF 9.5
Yinye Chen,Zhen Zhang,Xin Wang,Yidian Lin,Jiachang Zuo,Xuhui Yang,Songhua Chen,Yongjin Luo,Qingrong Qian,Qinghua Chen
In the oxidation reaction of volatile organic compounds catalyzed by metal oxides, distinguishing the role of active metal sites and oxygen mobility at specific preferentially exposed crystal planes and diverse temperatures is challenging. Herein, Co3O4 catalysts with four different preferentially exposed crystal planes [(220), (222), (311), and (422)] and oxygen vacancy formation energies were synthesized and evaluated in styrene complete oxidation. It is demonstrated that the Co3O4 sheet (Co3O4–I) presents the highest C8H8 catalytic oxidation activity (R250 °C = 8.26 μmol g–1 s–1 and WHSV = 120,000 mL h–1 g–1). Density functional theory studies reveal that it is difficult for the (311) and (222) crystal planes to form oxygen vacancies, but the (222) crystal plane is the most favorable for C8H8 adsorption regardless of the presence of oxygen vacancies. The combined analysis of temperature-programmed desorption and temperature-programmed surface reaction of C8H8 proves that Co3O4–I possesses the best C8H8 oxidation ability. It is proposed that specific surface area is vital at low temperature (below 250 °C) because it is related to the amount of surface-adsorbed oxygen species and low-temperature reducibility, while the ratio of surface Co3+/Co2+ plays a decisive role at higher temperature because of facile lattice oxygen mobility. In situ diffuse reflectance infrared Fourier spectroscopy and the 18O2 isotope experiment demonstrate that C8H8 oxidation over Co3O4–I, Co3O4–S, Co3O4–C, and Co3O4–F is mainly dominated by the Mars–van Krevelen mechanism. Furthermore, Co3O4–I shows superior thermal stability (57 h) and water resistance (1, 3, and 5 vol % H2O), which has the potential to be conducted in the actual industrial application.
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PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2023
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IF 15.1
Yizhou Wu,Wenqi Zhou,Liang Zhou,Su-Il In,Juying Lei,Lingzhi Wang,Jinlong Zhang,Yongdi Liu
The utilization of near-infrared (NIR) light with strong photothermal effect in photo-Fenton or Fenton-like systems for the degradation of organic pollutants is always ignored. In this study, we have synthesized a novel photothermal Fenton-like catalyst (Co 3 O 4 /PDA) to activate peroxymonosulfate (PMS) for the degradation of antibiotics. The Co 3 O 4 in the nanocomposite acts as a PMS activator, while unexpectedly, PDA was found to accelerate the redox cycle of Co 2+ /Co 3+ . Both Co 3 O 4 and PDA are black-colored photothermal materials with excellent NIR absorption properties. During the degradation process, the light-to-heat conversion ability of Co 3 O 4 and PDA enables a higher temperature, which innovatively boosts the rate of PMS catalytic activation. Mechanistic studies revealed that the increased temperature effectively promotes the heterogeneous catalytic PMS activation by Co 3 O 4 /PDA. As a result, the Co 3 O 4 /PDA + PMS + NIR system exhibits greatly enhanced degradation performance. Furthermore, this degradation system demonstrates strong tolerance to different operation conditions, and the catalyst exhibits good stability in cycling tests. These results demonstrate the favorable application prospects of this photothermal Fenton-like system in environmental water remediation. The findings also contribute valuable insights towards the development of efficient strategies for the photothermal activation of PMS.
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高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2022
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IF 9.965
Tianjun Ni,Hui Zhang,Zhibin Yang,Liping Zhou,Likun Pan,Chunling Li,Zhijun Yang,Dong Liu
In this work, Co 3 O 4 /g-C 3 N 4 catalyst with highly efficient adsorption and degradation of antibiotics was developed based on the combination of three-dimensional (3D) porous morphological controls of g-C 3 N 4 and the loading of Co 3 O 4 quantum dots (Co 3 O 4 QDs). It was discovered that the catalyst can effectively activate peroxymonosulfate (PMS) through a non-photochemical path, and a high tetracycline elimination rate of 99.7% can be achieved within 18 min. The characterization and density functional theory calculation results demonstrated that the porous 3D structure can not only promote the substrate adsorption reaction but also provide large surface area and countless exposed active sites for catalytic reaction . The introduction of Co 3 O 4 QDs lowered activation energy barrier and lead to high energy of PMS adsorption. More efficient charge migration between the catalyst and PMS further accelerated PMS activation. Thus, leading to the excellent catalytic performance. In addition, non-free radical mediated degradation mechanism of catalytic activity was also proposed. This work provides a scheme for designing novel and efficient PMS activators for the removal of abusive antibiotics from aqueous environments.
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PubMed
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
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2022
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IF 9.136
Sixing Dai,Lei Xiao,Qinliu Li,Gazi Hao,Yubing Hu,Wei Jiang
Graphitic carbon nitride (g-C 3 N 4 ) is a promising candidate for photocatalytic degradation of emerging environmental contaminants, pharmaceuticals and personal care products (PPCPs). To improve the photodegradation performance of pure g-C 3 N 4 , the construction of different heterostructures , surface modification and morphology engineering could be considered. However, the surface of g-C 3 N 4 is usually difficult to modify due to fewer functional groups on its surface. In this work, surface hydroxylated g-C 3 N 4 nanofibers were prepared by NaOH treatment (NTCN), and then went through an in-situ growth method to obtain 0D/1D Co 3 O 4 -NTCN nanocomposites . Hydrolysis can effectively modify the surface of g-C 3 N 4 to make it rich in hydroxyl and reduce the number of amino groups, which is conducive to photocatalytic activity. Surface hydroxylation of NTCN was confirmed by FTIR and XPS. Structurally, Co 3 O 4 -NTCN has a unique 0D / 1D structure, which has not been reported much on photocatalysts based on carbon nitride , providing a large surface area and short diffusion distances and resulting in more exposure to the light and the effective transfer of interfacial photogenerated charge from the interior to the surface. The photodegradation ratio of TC, DCF and MT can reach 97.3% TC, 88.9% and 63.2% within 60 min respectively. DFT calculation is used to illustrate the band structure and separation and migration of photoinduced charges of Co 3 O 4 -NTCN composites. Radicals trapping test demonstrate O 2 ⋅− and ⋅OH are the major radicals, and a possible Z-scheme mechanism is proposed.
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高影响因子
ENERGY & FUELS
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2022
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IF 4.654
Bin Liu,Songlin Xue,Shifeng Tan,Duxin Zhang,Zhao Deng,Hongfei Pan,Wenmao Tu,Ruiming Zhang,Haining Zhang,Yadong Wang
In this work, a two-step calcination method to fabricate Co3O4@CoP hollow nanoparticles embedded in N, S-co-doped reduced graphene oxide substrates is reported. The electrocatalyst is synthesized through a hydrothermal-calcination method of adding graphene oxide using ZIF-67 as a template followed by an annealing process in the presence of NaH2PO4·H2O. In the designed electrocatalyst, the formed hollow nanoparticles had an average diameter of 100 nm. The synthesized electrocatalyst displays a hydrogen evolution reaction overpotential of 54 mV at 10 mA cm–2 current density in 0.5 mol L–1 H2SO4 solution at room temperature, comparable to Pt/C catalysts. The oxygen evolution reaction overpotential in 1 mol L–1 KOH electrolyte is 288 mV, which is almost equivalent to that of IrO2. Stated thus, the as-prepared composite catalysts are promising candidates for bifunctional catalysts for water splitting technology, relieving the limitation of commercial catalysts caused by their single catalytic performance.
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