JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2026
·
IF 9.6
Qiyan Sun,Ruixue Zhang,Wen Zhang,Jinsheng Lin,Dianxing Ju,Yongming Chai,Guang-Rui Xu,Lei Wang
Effective modulation of spin state in spinel cobalt oxides by transition metal Fe doping is applied to enhance the chlorine evolution reaction. • Fe-Co 3 O 4 exhibits superior selectivity and stability for the chlorine evolution reaction compared with pure Co 3 O 4 . • The preferential Cl − adsorption on Fe-Co 3 O 4 was confirmed by open-circuit potential measurements and theoretical calculations. The chlorine evolution reaction (CER) is pivotal for advancing the chlor-alkali industry, which is limited by the sluggish kinetics. Transition metal catalysts offer highly tunable electronic structures, where regulating the spin state of metal centers is crucial but challenging for enhancing CER performance. Herein, Fe-doped spinel oxides (Fe-Co 3 O 4 ) were synthesized via a simple sol-gel method. The strategic incorporation of Fe ions introduces geometric confinement, which modulates octahedral distortion at the surface and thereby regulating the spin state of Co centers, ultimately optimizing CER activity and stability. Combined experimental and theoretical analyses reveal that Fe doping triggers a spin-state transition in Co ions from high-spin towards intermediate-spin or low-spin configurations. The enhanced electronic interaction between Co and Fe 3d orbitals in Fe-Co 3 O 4 leads to superior CER selectivity compared to pure Co 3 O 4 , even under unfavorable conditions such as high pH and lower Cl − concentrations. Furthermore, Fe-Co 3 O 4 nanocubes exhibit excellent durability, maintaining stable performance for over 50 h, which is significantly better than that of Co 3 O 4 . Theoretical calculations confirm that octahedral Co and Fe sites in Fe-Co 3 O 4 serve as the active centers for chloride ion release, in contrast to the tetrahedral Co sites in pristine Co 3 O 4 . The spin state modulation of Co not only facilitates chloride ion adsorption but also optimizes the adsorption energetics, elucidating the fundamental mechanism behind the enhanced CER activity. This work highlights the critical role of spin-state regulation at active sites and proposes a chitosan gel-mediated cross-linking strategy for fabricating high-performance CER catalysts. Fe-Co 3 O 4 nanocubes were successfully synthesized via a sol-gel strategy, in which transition metal Fe doping was effectively used to modulate the spin state of Co 3 O 4 in spinel to improve chlorine evolution reaction performance. Download: Download high-res image (135KB) Download: Download full-size image
✓ 已验证
产品关联
DOI
高影响因子
Journal of Environmental Chemical Engineering
·
2026
·Vol. 14
·期 5
·124477
·
IF 7.5
Ke Yin,Juntai Tian,Ziwei Wang,Bichun Huang
Morphology engineering is an effective strategy to regulate the catalytic performance of transition metal oxides for chlorinated volatile organic compound (CVOCs) elimination, yet the morphology-dependent response to surface modification and its intrinsic mechanism remain insufficiently understood. Herein, cubic Co 3 O 4 -c and plate-like Co 3 O 4 -p with distinct surface defect densities were selected as model catalysts to systematically reveal the morphology-dependent effect on chlorobenzene (CB) oxidation, with surface phosphorylation employed as a regulated means to probe the intrinsic morphology-dependent regulation mechanism. Surface phosphorylation exhibits a significant morphology-dependent feature. It retains the intrinsic spinel structure of Co 3 O 4 and triggers surface electronic redistribution via constructed Co–O–P bonds. High-defect Co 3 O 4 -p presents favorable responsiveness to phosphorylation, which synchronously boosts acid sites, surface Co 3 + proportion and adsorbed active oxygen content. By contrast, phosphate species partially cover surface active sites of low-defect Co 3 O 4 -c, leading to activity decline. The optimized HP-Co 3 O 4 -p delivers a T 90 value of 330 ℃ toward CB combustion, 23 ℃ lower than pristine Co 3 O 4 -p, and retains 84% conversion after 10 h reaction with mitigated attenuation. Mechanism analysis demonstrates that the morphology-dependent effect originates from the difference in surface defect density. On high-defect Co 3 O 4 -p, P–OH groups supply protons to facilitate C–Cl bond activation and HCl desorption, and phosphate moieties alleviate chlorine enrichment and restrain polychlorinated byproducts. This work reveals the morphology-dependent phosphorylation mechanism of Co 3 O 4 and guides the rational design of efficient CVOCs catalysts.
✓ 已验证
产品关联
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2026
·
IF 5.4
Yuqing Sui,Jinlong Li,Xue Yang,Dongxuan Guo,Mingna Chu,Guozhe Sui
ZIF-67-derived Co 3 O 4 /MXene Schottky heterojunction is constructed successfully. • MXene concentrates CO 2 molecules and participates in surface redox reactions. • Schottky heterointerface improves photogenerated carrier separation. • Co 3 O 4 /MXene Schottky heterojunction achieves effectively photocatalytic CO 2 reduction to CO. The escalating emission of carbon dioxide necessitates the urgent development of efficient CO 2 conversion technologies. Herein, a novel Co 3 O 4 /MXene Schottky heterojunction photocatalyst was rationally designed and synthesized, where Co 3 O 4 is derived from ZIF-67 and anchored onto MXene nanosheets. The composite demonstrates high activity in photocatalytic CO 2 reduction, achieving a yield rate of 58 μmol g −1 h −1 for CO using triethanolamine (TEOA) as an electron donor, while maintaining excellent stability over multiple cycles. The enhanced performance stems from the Schottky junction between Co 3 O 4 and MXene, which establishes a built-in electric field that drives efficient charge separation and directional carrier flow. Additionally, MXene acts as a cocatalyst that not only concentrates CO 2 molecules near active sites but also participates in surface redox reactions. This work offers an effective strategy for designing high-performance photocatalysts for sustainable solar fuel production. Download: Download high-res image (368KB) Download: Download full-size image A novel ZIF-67-derived Co 3 O 4 /MXene Schottky heterojunction exhibits photocatalytic CO 2 reduction to CO with production rate of 58 μmol g −1 h −1 .
✓ 已验证
DOI
高影响因子
ACS Applied Nano Materials
·
2019
·
IF 0
Lihong Liu,Ming Yang,Shan Gao,Xianfa Zhang,Xiaoli Cheng,Yingming Xu,Hui Zhao,Lihua Huo,Zoltán Major
Small-sized Co3O4 hollow nanosphere/graphene (Co3O4–HNS/G) composites are fabricated via a cross-linking deposition. The Co3O4 hollow nanospheres with a diameter of around 15 nm are well-distributed on graphene sheets. The sensor based on the Co3O4–HNS/G (the optimal graphene content is 4.6 wt %) composite exhibits an excellent sensing response (30.6) to 50 ppm of H2S near room temperature of 50 °C, which is 3.3 times that of pristine Co3O4 (92 °C). The lowest H2S gas concentration that can be detected is 0.1 ppm. The composite-based sensor also shows excellent long-term stability, selectivity, and repeatability to H2S at 50 °C. The improved H2S-sensing properties may be attributed to a synergistic effect of unique small-sized Co3O4 mesoporous hollow nanosphere structures, large specific surface area, more chemically adsorbed oxygen, and isotype P–P heterojunctions.
✓ 已验证
DOI
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2018
·Vol. 29
·期 10
·8535-8546
·
IF 2.324
Xiao Jia,Diao Kaidi,Zheng Zhou,Cui Xudong
We report a facile strategy to synthesize porous ZnO/Co 3 O 4 composites by direct pyrolysis of the metal–organic frameworks (MOFs) precursor and their applications to the sensing of acetone at ppb–ppm level. The as-prepared ZnO/Co 3 O 4 sample exhibits enhanced sensitivity (15.17 ppm −1 ), high selectivity towards low-concentration acetone when compared with pure ZnO. The enhancement in gas sensing performance of ZnO/Co 3 O 4 sample could be attributed to the unique porous structure, the p -Co 3 O 4 / n -ZnO junctions effect and the catalytic activity of Co 3 O 4 . The studies might open intriguing perspectives for the design of porous p/n composites for high performance gas sensing applications.
研究领域:
材料科学
·
气体传感
·
纳米材料
·
化学传感器
·
无机化学
✓ 已验证
DOI
高影响因子
Journal of the Taiwan Institute of Chemical Engineers
·
2017
·
IF 4.217
Liwei Chen,Tianming Cai,Wenjie Sun,Xu Zuo,Dahu Ding
A facile hydrothermal and subsequent calcination method is proposed for the synthesis of mesoporous bouquet-like Co 3 O 4 nanostructure . The prepared Co 3 O 4 nanostructure is efficient for the activation of peroxymonosulfate (PMS). Morphological observation clearly indicates that the micron-scale bouquet-like structure is composed of numerous regular Co 3 O 4 nano-rods. X-ray diffraction (XRD), X-ray photo-electron spectroscopy (XPS), and fourier transform infrared spectroscopy (FTIR) spectra indicate the high purity and crystallinity of the prepared Co 3 O 4 nanostructure. The N 2 adsorption-desorption isotherm analysis shows that the bouquet-like Co 3 O 4 nanostructure possesses a moderate specific surface area (37.0 mg −2 ) and mesoporous property. The fluoroquinolone antibiotics (nofloxacin, NOR and ofloxacin, OFX) can be effectively degraded in the Co 3 O 4 /PMS oxidation system under ambient conditions. In addition, the extremely low metal leaching (no more than 0.07%) indicates that the heterogeneous activation mechanism plays a much significant role in the activation process. By using the radical scavengers, the sulfate radical is found to be the dominant oxidative species in the degradation process. These results reveal that the designed Co 3 O 4 nanostructure exhibit promising capability for the environmental remediation.
研究领域:
环境科学
·
材料科学
✓ 已验证
DOI
高影响因子
CHINESE JOURNAL OF CHEMICAL ENGINEERING
·
2024
·
IF 3.7
Jianfang Liu,Hongwei Huang,Jie Yang,Laishuan Liu,Yu Li
A series of Au/Co x Fe 3- x O 4 catalysts was synthesized using the sol-deposition method by depositing 2–5 nm Au particles on Fe-doped Co 3 O 4 . Co 2 FeO 4 , with a Co/Fe molar ratio of 2:1, exhibited higher specific surface area , Co 3+ /Co 2+ ratio, and oxygen vacancy content compared to Co 3 O 4 . As a result, it displayed better performance in CO oxidation , achieving a total conversion temperature ( T 100 ) of 96 °C. Au greatly improved the catalytic efficiency of all Co x Fe 3- x O 4 samples, with the 0.2%Au/Co 2 FeO 4 catalyst achieving a further decrease in T 100 to 73 °C. Stability tests conducted at room temperature on the 1%Au/Co x Fe 3- x O 4 catalysts demonstrated a slowed deactivation rate after Fe-doping. The reaction pathway for CO oxidation catalyzed by Au/Co 2 FeO 4 followed the Mars-van Krevelen mechanism.
研究领域:
材料科学
·
催化化学
·
纳米技术
·
环境化学
·
能源化学
✓ 已验证
DOI
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2023
·
IF 13.6
Baolin Chang,Tiannan Cao,Zhizhang Shen,Yipu Zhang,Zhenyu Wang,Ji Li,Jinze Lyu
Obtaining high removal rate of chlorinated volatile organic compounds (CVOCs) and CO 2 selectivity with a low ratio of O 3 /CVOC and energy consumption is challenging. Dodecylamine was used in this study to create active sites on Co 3 O 4 for photo-ozone catalytic mineralization of dichloromethane (DCM). Amine-Co 3 O 4 -450 is a dodecylamine-modified sample with high density of Co 3+ , Co 2+ , and hydroxyl due to its nanosheet structure and exposed (112) facets. The optimized surface significantly enhanced the cleavage of the C–Cl bond at low temperatures. Photocatalysis primarily participated in the oxidation of intermediates following DCM dichlorination and significantly improved CO 2 selectivity. The respective DCM removal rate and mineralization efficiency of Amine-Co 3 O 4 -450 with an O 3 /DCM molar ratio of 1.27 and one-sun irradiation were 14.9 and 15.0 times higher than the sum of those in the presence of light irradiation or O 3 alone. This finding indicated that a strong synergistic effect exists between O 3 and light.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
·
2023
·
IF 4.5
Yanli Zhang,Jiuqing Xiong,Shihai Yan,Bingping Liu
Electrochemical reduction of nitrate to NH 3 is a very promising alternative reaction to the Haber-Bosch process, and it is necessary to develop the efficient electrocatalysts. In this study, a particle-support mode Co 3 O 4 catalyst was synthesized with ZIF-67 as the precursor, and then dispersed on MoS 2 nanoflowers by hydrothermal method. The Co 3 O 4 is anchored to MoS 2 by forming Co-S coordination bond. Furthermore, the particle-supported Co 3 O 4 exhibits better performance than Co 3 O 4 alone, as is manifested by higher Faradaic efficiencies and NH 3 yield rate at − 0.64 V (52.69% vs 32.03%; 4539.61 μg h −1 mg −1 cat vs 2048.63 μg h −1 mg −1 cat ), lower energy barriers (0.96 eV vs 1.19 eV), and better electronic conductivity (Bandwidth: 0.581 eV vs 0.613 eV). In addition, this research provides an effective solution to solve the aggregation problem of metal oxide nanoparticles.
✓ 已验证
产品关联
DOI
高影响因子
International Journal of Electrochemical Science
·
2023
·
IF 1.5
Ruyi Zou,Lin Zhu,Guiling Luo,Yanyan Niu,Hui Xie,Ruixia Dong,Hui Cheng,Wei Sun,Laijun Zhang
Arginine-assisted thermal decomposition technique was used to prepare nanosized Co 3 O 4 (A-Co 3 O 4 ) with its supercapacitive performances checked. A-Co 3 O 4 was characterized by different techniques such as X-ray diffraction, X-ray photoelectron spectroscopy, Fourier transform infrared spectroscopy and scanning electron microscopy. Brunauer-Emmett-Teller analysis revealed that A-Co 3 O 4 had a larger specific surface area than Co 3 O 4 prepared by conventional calcination without arginine (F-Co 3 O 4 ). Electrochemical performances of A-Co 3 O 4 based electrode were better than that of the F-Co 3 O 4 based electrode. Cyclic voltammetric results showed the specific capacitances of A-Co 3 O 4 and F-Co 3 O 4 were found to be 259.2 and 122.2 F/g at a scan rate of 0.01 V/s. Long-term galvanostatic charge-discharge cycling tests indicated the specific capacitance for A-Co 3 O 4 and F-Co 3 O 4 were 128.6 F/g and 106.4 F/g with 104.7% and 103.3% capacitance retention after 1000 cycles at a current density of 5.0 A/g. Electrochemical impedance spectra analysis showed the charge transfer resistance (Rct) of A-Co 3 O 4 was 7.56 Ω and that of F-Co 3 O 4 was 15.56 Ω. All the results indicated the A-Co 3 O 4 exhibited superiority originated from large surface area with porous structure.
✓ 已验证
产品关联
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2022
·
IF 5.518
Chengcheng Qi,Chongchao Zhang,Ziyin Yang
Defect engineering was considered as an effective strategy to regulate electrocatalytic activities of transition metal oxides . However, there are seldom reports about metal defects in electrochemical sensing. In this work, Co-defected Co 3 O 4 was synthesized via thermal treatment of glycerolatocobalt (CoGly) precursor for constructing a novel electrochemical nonenzymatic glucose sensor. The obtained nanomaterials were characterized by transmission electron microscopy (TEM), powder X-ray diffractometry (XRD), Raman spectra , X-ray photoelectron spectroscopy (XPS) and electrochemical techniques . The presence of Co defects regulated electronic structure of Co 3 O 4 , which not only speeds up electron transfer rate but also exposes more high-valent Co sites, thus improving electrocatalytic activities. Under optimized conditions, Co-defected Co 3 O 4 electrode exhibited excellent performance for glucose analysis with a wide linear range of 0.2 µM to 0.5 mM, a low detection limit of 0.16 µM. Importantly, an ultrahigh sensitivity of 2595.7 µA·mM −1 ·cm −2 was also obtained, which was about 10 times higher than that of conventional Co 3 O 4 . Therefore, engineering Co 3 O 4 with Co defects is an effective strategy to tailor electrocatalytic activity, which sheds light on the potential applications of metal defects in the field of electrochemical nonenzymatic sensing.
✓ 已验证
产品关联
DOI
高影响因子
DIAMOND AND RELATED MATERIALS
·
2022
·
IF 3.806
Ruyi Zou,Baoli Wang,Lin Zhu,Lijun Yan,Fan Shi,Yunxiu Sun,Bo Shao,Siyue Zhang,Wei Sun
Carbon based composites derived from various biomasses have exhibited excellent application prospects in the field of supercapacitors . Herein, the Co 3 O 4 nanoparticles supported on biomass eggfruit-derived porous carbon (EPC) was prepared via solvothermal method and subsequent calcination , in which the shells of eggfruit's kernel (SEK) were used as carbon source and cobalt phthalocyanine was employed as precursor of Co 3 O 4 . The resultant composite was denoted as Co 3 O 4 @EPC and its supercapacitive performances were checked in details. Scanning electron microscopy and transmission electron microscopy images of Co 3 O 4 @EPC show that EPC has a three-dimensional porous network structure, and Co 3 O 4 nanoparticles with an average particle size of 7 nm are uniformly dispersed on the EPC carrier. In the three-electrode system with 6 mol L −1 KOH as electrolyte, the specific capacitance of Co 3 O 4 @EPC/Ni foam electrode is 781 F g −1 at the current density of 0.5 A g −1 , which is much higher than that of p-Co 3 O 4 electrode (429.69 F g −1 at 0.5 A g −1 ) or EPC (125.39 F g −1 at 0.5 A g −1 ) electrode under the same conditions. The energy density of a two-electrode device with Co 3 O 4 @EPC/Ni foam electrode as positive electrode and EPC/Ni foam electrode as negative electrode was 32.8 Wh K g −1 at the power density of 1333 W K g −1 . In addition, the device has good cyclic stability with a capacitance retention rate of 96.7% after 20,000 cycles. These results indicate that the excellent properties of the Co 3 O 4 @EPC make it a potential electrode material for high-performance supercapacitors .
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）