APPLIED CATALYSIS B-ENVIRONMENTAL
·
2025
·
IF 21.1
Kexin Tian,Ye Liu,Yating Fu,Yi Ren,Chuanshu He,Zhaokun Xiong,Heng Zhang,Yang Liu,Jianping Zou,Jing Zhang,Bo Lai
A novel surface oxidation-dominated heterogeneous catalytic ozonation (HCO) process was developed to overcome matrix-induced scavenging limitations. By fabricating CuO-Co 3 O 4 heterojunction as catalyst, surface adsorbed hydroxyl radical (•OH ad ) and surface atomic oxygen ( ⁎ O ad ) emerge as primary reactive oxygen species (ROS) from ozone decomposition. The engineered catalyst achieves 4.3-fold and 1.9-fold higher oxalic acid degradation efficiency than CuO and Co 3 O 4 , respectively, accompanied by broad-spectrum mineralization for refractory pollutants and robust Cl⁻ resistance with verification in actual hypersaline industrial wastewater treatment. Combined characterization and theoretical calculations reveal that heterojunction formation increases Lewis acid sites and induces directional electron transfer from CuO to Co 3 O 4 , thereby lowering ozone activation barriers and accelerating surface-bound ROS generation, wherein O 3 is preferentially decomposed into •OH ad and ⁎ O ad at Co sites but only •OH ad at Cu sites. Collectively, this study advances a surface-bound ROS mediated catalytic ozonation paradigm with superior matrix resistance, enabling broader industrial deployment of HCO.
✓ 已验证
产品关联
DOI
高影响因子
APPLIED CATALYSIS A-GENERAL
·
2025
·
IF 4.8
Yiquan Zhan,Shaohui Lai,Junzhe Jiang,Lijiao Zhong,Yongsheng Liu,Kai Yang,Jinbiao Liu,Shiyong Liu,Liqing Li,Yoshihisa Sakata
Strontium titanate (SrTiO 3 ) holds great potential for photocatalytic overall water splitting (OWS) to produce hydrogen. However, the current SrTiO 3 -based photocatalysts require expensive noble metals, such as Pt and Rh. There is an urgent need to explore cost-effective alternatives using non-noble metals. Herein, Cu, Cr, and Co were used as non-noble cocatalyst to modify the surface of Ga˗doped SrTiO 3 photocatalyst (Ga-STO (flux)). The characterization results of XPS and TEM revealed the CuCrO x cocatalysts generated reduced Cu 0 /Cu + species for hydrogen evolution reaction. The inclusion of Cr 2 O 3 aided in maintaining the stability of Cu 0 /Cu + species. The Co 3 O 4 cocatalysts were responsible for the oxygen evolution reaction. Under simulated sunlight, the optimal CuCrO x /Co 3 O 4 /Ga-STO (flux) sample provided the best hydrogen and oxygen production rates of 204.56 μmol·h⁻¹ and 102.28 μmol·h⁻¹ , respectively.
✓ 已验证
产品关联
DOI
高影响因子
CRYSTENGCOMM
·
2025
·
IF 2.6
Yixuan Yuan,Chang Liu,Shanshan Liu,Ruimin Ding,Xi Yin
Proton exchange membrane water electrolysis (PEMWE) powered by renewable electricity is a promising technology for green hydrogen production. Ru-based catalysts are a cost-effective alternative to Ir-based counterparts for the oxygen evolution reaction (OER), yet achieving balanced activity and stability remains challenging. In this study, we optimize the performance of RuO2 by constructing RuO2/Ru–Co3O4 heterogeneous interfaces. Our results indicate that RuO2/Ru–Co3O4 catalyst pyrolyzed at lower temperatures exhibits uniformly small particle sizes with abundant heterointerfaces and strong interfacial electronic interactions. Elevated pyrolysis temperatures enlarge catalyst particle sizes, simultaneously decreasing heterointerfaces and weakening the interfacial interactions. In rotating disk electrode experiments, the mass activity of the RuO2/Ru–Co3O4 catalysts is significantly improved compared to the commercial RuO2. This improvement is attributed to the heterogeneous interfaces, which offer greater utilization of active sites and enhanced charge transfer capabilities. Furthermore, the mass activity of the RuO2/Ru–Co3O4 catalysts decreases with increasing pyrolysis temperatures due to the reduction in heterogeneous interfaces. Additionally, the stability of the RuO2/Ru–Co3O4 catalysts is notably superior to that of commercial RuO2, owing to the interfacial electronic interactions. However, this stability is negatively impacted by higher pyrolysis temperatures as the interfacial electronic interactions weaken. In preliminary membrane electrode assembly tests, the RuO2/Ru–Co3O4 catalyst with low Ru loading shows higher activity than commercial RuO2. Further triple-phase boundary optimization of the catalyst layer is needed. These findings contribute to advanced RuO2-based catalyst design for PEMWE.
✓ 已验证
产品关联
DOI
高影响因子
ACS Sensors
·
2025
·
IF 9.1
Tianrun Zheng,Yi Lu,Yilin Wang,Hong Zhou,Kang Yang,Mingxue Zhang,Yueying Liu,Fengmin Liu,Geyu Lu
Optimizing and improving the surface activity of Co3O4 sensing materials are crucial for applications in triethylamine detection. Herein, indium-doped Co3O4 hollow microflowers (InCo HMfs), assembled from ultrathin nanosheets, were prepared via a hydrolysis reaction. Three distinct crystal facets─{1 1 0}, {1 1 1}, and {0 0 1}─were observed in 2-InCo HMfs. Results from TEM, XPS, and XAS characterization show that the increase of Co2+ content induced by indium doping promotes the formation of highly active crystal planes in Co3O4. DFT calculations revealed the reasons for the improvement in the gas sensing performance of 2-InCo HMfs and the multiple effects of In ions. Our dual strategy of doping with indium and hydrolysis markedly improved the intrinsic TEA sensing performance of Co3O4, offering a novel avenue for designing high-performance TEA sensors.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2025
·
IF 9.7
Fuxin Wang,Guojun Lv,Jiande Hu,Zixiang Li,Xupeng Yang,Shengnan Xu
Heterogenization of Co-based catalyst can effectively solve the catalyst recovery problem encountered by homogenous catalyst Co(OAc) 2 , but there may generate an obvious performance decrease for the heterogenized cobalt site ascribed to the increased mass transfer resistance. Hence, how to alleviate or eliminate the performance decline for Co-based heterogeneous catalyst is an intriguing scientific question. In this study, we reported the application of crystal engineering strategy on Co 3 O 4 to bridge the performance gap between homogeneous catalyst and heterogeneous catalyst in the selective oxidation of toluene into benzaldehyde. Four distinct spinel Co 3 O 4 catalysts, predominantly exposing the {220}, {222}, {440}, and {311} crystal facets respectively, were prepared and utilized as heterogeneous catalysts. The Co 3 O 4 -P sample predominantly exposing the {220} facets exhibited the optimal catalytic activity for toluene oxidation, achieving a toluene conversion of 56.1 % and a benzaldehyde selectivity of 67.6 %, which was significantly superior to that of homogenous catalyst Co(OAc) 2 . The enhanced performance of this material is primarily attributed to the abundant reversible Co 2+ /Co 3+ redox couples on its surface, which maintains sufficient Co 2+ active sites throughout the catalytic process and facilitates toluene oxidation reactions. In addition, Co 3 O 4 -P also exhibited the maximum specific surface area, the highest Co 2+ /Co 3+ ratio, and the greatest oxygen vacancy density, which together give rise to its best catalytic performance. Density functional theory (DFT) calculations further corroborated these findings. According to quenching experiments and in-situ FTIR characterizations, the possible selective toluene oxidation mechanism over Co 3 O 4 -P catalyst was proposed. Moreover, the recycled Co 3 O 4 -P sample could be reused for more than five consecutive reactions, demonstrating its eminent re-usability.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2022
·
IF 9.221
Jie Hu,Wangwang Guan,Xueqing Xiong,Yong Chen,Haizhu Long
A carbon nanomaterials-modified MOF-derived Co 3 O 4 p–p heterojunction was successfully constructed using a solution-combination-calcination method. The morphological and structural characteristics and their gas sensing performances were comprehensively investigated. Particularly, the synergistic effect between different carbon nanomaterials and Co 3 O 4 mesoporous structures was carefully studied. The gas sensing results revealed that the sensor based on the CNT-rGO-Co 3 O 4 nanocomposites exhibited better gas sensing properties toward the ethanol gas, including higher response, admirable antihumidity, and shorter response–recovery time than the other Co 3 O 4 samples. The gas sensitivity of CNT-rGO-Co 3 O 4 nanocomposites reached to be as high as 127.1, which was 5.8 times higher than that of a pure Co 3 O 4 gas sensor when exposed to 100 ppm ethanol. The enhanced gas sensing performance of the sensor fabricated by the CNT-rGO-Co 3 O 4 nanocomposites could be attributed to the promising synergistic effect between carbon nanomaterials and Co 3 O 4 nanobox, implying that the heterojunction structure and coupling effect would dramatically optimize the gas sensing reaction process, resulting in improved gas sensing performance.
✓ 已验证
DOI
高影响因子
Journal of Physical Chemistry C
·
2020
·
IF 4.189
Jingdong Yang,Xueyan Xu,Xufeng Zhou,Shunqiong Jiang,Wen Chen,Siqi Shi,Da Wang,Zhaoping Liu
Co3O4 nanoparticles with smaller particle size can expose more active sites to react with electrolytes, thereby exhibiting better supercapacitive performance. However, the size of Co3O4 nanoparticles is difficult to be effectively controlled in traditional carbon matrices. Herein, P, N-codoped carbon matrices with ultrahigh surface area and abundant nanocavities are used as a novel host to confine the growth of Co3O4 nanoparticles. The Co3O4/carbon composites with high redox activities of Co3O4 are successfully obtained, in which Co3O4 nanoparticles are strongly anchored in the carbon matrices, resulting in the enhancement of the composites’ capacitive performance (1310 F g–1 at 0.5 A g–1). Meanwhile, the strong anchoring effect of the carbon host on Co3O4 nanoparticles because of the rich doping elements and the confinement effect of the nanocavities ensure long-term stability (92% capacitance retention after 5000 cycles). Furthermore, the assembled asymmetric supercapacitor using this composite as the cathode material and activated carbon as the anode material delivers a high energy density of 47.18 W h kg–1 at 375 W kg–1.
✓ 已验证
DOI
高影响因子
Carbon Letters
·
2023
·Vol. 33
·期 6
·1591-1600
·
IF 4.5
Guo Ruibin,Fang Mengqi,Chen Qianglong,Wang Nan,Wang Bingjie,Liu Nijuan,Mo Zunli
A novel kind of self-assembled graphene quantum dots-Co 3 O 4 (GQDs-Co 3 O 4 ) nanocomposite was successfully manufactured through a hydrothermal approach and used as an extremely effectual oxygen evolution reaction (OER) electrocatalyst. The characterization of morphology with scanning electron microscopy (SEM) and transmission electron microscopy (TEM) showed that Co 3 O 4 nanosheets combined with graphene quantum dots (GQDs) had a new type of hexagonal lamellar self-assembly structure. The GQDs-Co 3 O 4 electrocatalyst showed enhanced electrochemical catalytic properties in an alkaline solution. The start potential of the OER was 0.543 V (vs SCE) in 1 M KOH solution, and 0.577 V (vs SCE) in 0.1 M KOH solution correspondingly. The current density of 10 mA cm −2 had been attained at the overpotential of 321 mV in 1 M KOH solution and 450 mV in 0.1 M KOH solution. Furthermore, the current density can reach 171 mA cm −2 in 1 M KOH solution and 21.4 mA cm −2 in 0.1 M KOH solution at 0.8 V. Moreover, the GQDs-Co 3 O 4 nanocomposite also maintained an ideal constancy in an alkaline solution with only a small deterioration of the activity (7%) compared with the original value after repeating potential cycling for 1000 cycles.
✓ 已验证
DOI
高影响因子
VACUUM
·
2020
·
IF 2.906
Shaoju Jian,Xiaofan Ma,Qingming Wang,Jinglin Wu,Yifan Wang,Shaohua Jiang,Wenhui Xu,Weisen Yang
Increasing the complexity of external or internal structure of hierarchical nanomaterials is essential to improve the specific capacity and stability of anode for lithium ion batteries (LIBs). Three types of porous Co 3 O 4 nanocubes (concave-cube, yolk-shell cube and porous cube) with novel hollow structures were synthesized straightforwardly by annealing zeolitic imidazolate framework (ZIF-67) under varied temperatures of 350 °C, 450 °C and 550 °C, respectively. Consequently, the resulting concave, core-shell and porous Co 3 O 4 nanocubes exhibited superior specific capacities of 1009, 1148 and 696 mA h g −1 , respectively, at a current density of 200 mA g −1 after 200 cycles. Even at a high current density of 10 A g −1 , the core-shell Co 3 O 4 nanocube still showed a large reversible capacity of 317 mA h g −1 . The complex hierarchical texture, porous shell and core, and well-defined hollow structure of the Co 3 O 4 nanocubes were contributed greatly to the good lithiation/delithiation reversibility, ultralong cycling stability and enhanced rate capability.
✓ 已验证
DOI
高影响因子
JOURNAL OF APPLIED ELECTROCHEMISTRY
·
2014
·Vol. 44
·期 7
·781-788
·
IF 2.147
Mo Yudi,Ru Qiang,Song Xiong,Hu Shejun,An Bonan
The spinel-type Co 3 O 4 with a dendritic nanostructure is prepared via homogeneous co-precipitation method in the presence of oxalic as complex agent. The special structure was characterized by X-ray diffraction, field emission scanning electron microscopy, transmission electron microscopy, and thermogravimetric analysis, which show that the precursor can be transformed into dendritic crystal Co 3 O 4 by calcining at 500 °C for 2 h with a diameter of 20–50 nm. Such a three-dimensional interconnected structure used as an anode material for lithium-ion batteries shows that the discharge specific capacity still remains at 951.7 mA h g −1 after 100 cycles at a current density of 100 mA g −1 . Furthermore, this material also presents a good rate performance; when the current density increases to 1,000, 4,000, and 8,000 mA g −1 , the reversible capacity can render about 1,126.2, 932.3, and 344.2 mA h g −1 , respectively. The excellent electrochemical performance is mainly attributed to the dendritic nanostructure composed of interconnected Co 3 O 4 nanoparticles.
✓ 已验证
DOI
高影响因子
ANALYST
·
2012
·Vol. 137
·期 24
·5803-5808
·
IF 4.23
Chuantao Hou,Qin Xu,Lina Yin,Xiaoya Hu
Co3O4 nanoparticles (NPs) with an average diameter of about 20 nm were synthesized by using MOFs as a template. Scanning electron microscopy (SEM) and transmission electron microscopy (TEM) were employed to characterize the as-prepared Co3O4 NPs. Fourier transform infrared spectroscopy (FT-IR) and X-ray diffraction (XRD) were used to confirm the structure of the Co3O4 NPs. Then the Co3O4 NPs were modified on a glassy carbon electrode (GCE) to obtain a non-enzymatic glucose and H2O2 sensor. The NPs show electrocatalytic activity toward oxidation of glucose and H2O2 in alkaline medium. For glucose detection, the developed sensor shows a short response time (less than 6 s), a high sensitivity of 520.7 μA mM−1 cm−2, a detection limit of 0.13 μM (S/N = 3), and good selectivity. The high concentration of NaCl does not poison the electrode. Its application for the detection of glucose in a human blood serum sample shows good agreement with the results obtained from the hospital. Furthermore, the proposed sensor was used for the detection of H2O2. The results indicate that the detection limit and sensitivity for H2O2 are 0.81 μM and 107.4 μA mM−1 cm−2, respectively. Determination of H2O2 concentration in a disinfectant sample by the proposed biosensor also showed satisfactory result. The high sensitivity and low detection limit can be attributed to the excellent electrocatalytic performance of the as-prepared Co3O4 NPs. These results demonstrate that the as-prepared Co3O4 NPs have great potential applications in the development of sensors for enzyme-free detection of glucose and H2O2.
✓ 已验证
DOI
高影响因子
ELECTROCHIMICA ACTA
·
2013
·
IF 3.777
Lian-Kui Wu,Ji-Ming Hu
Nanoporous Co 3 O 4 (po-Co 3 O 4 ) films have been prepared on stainless steel substrate by a novel two-step method. Firstly, a composite Co 3 O 4 -SiO 2 film was fabricated via electrochemical co-deposition under a cathodic potential from the mixed sol-gel precursor. Then, the obtained composite film was underwent consecutive cycling voltammetries in a concentrated KOH solution to etch the SiO 2 component, leading to the formation of po-Co 3 O 4 films. The resultant film electrode exhibits satisfactory electrocatalytic property towards the oxygen evolution reaction (OER).
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）