Molecular Catalysis
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2022
·
IF 5.089
Ning Xiang,Yarong Bai,Qiaoyan Li,Xiaojin Han,Jianfeng Zheng,Qingsong Zhao,Yaqin Hou,Zhanggen Huang
Low-temperature HCHO oxidation over transition-metal oxide catalysts is still a ‘‘hot potato”. Herein, hierarchical hollow Co 3 O 4 @CoMn 2 O 4 nanocages (Co 3 O 4 @CoMn 2 O 4 -NCs) were designed and prepared by using ZIF-67 nanocubes (ZIF-67-NCs) engaged self-templated method. Compared with single-compositional Co 3 O 4 -NCs and solid CoMn 2 O 4 -NPs, the as-prepared Co 3 O 4 @CoMn 2 O 4 -NCs exhibited much superb HCHO oxidation performance, achieving 90% HCHO conversion at 107°C. The characterization results manifested that the special hierarchical hollow structure of Co 3 O 4 @CoMn 2 O 4 -NCs facilitated the exposure of active sites and the generation of oxygen vacancies, thereby endowing them with higher O 2 activation ability and richer reactive oxygen species (ROS). In-situ DRIFTS results suggested that richer reactive oxygen species (ROS) of hierarchical hollow Co 3 O 4 @CoMn 2 O 4 -NCs boosted the oxidation of formate species, which was the rate-determining step for HCHO oxidation. Meanwhile, the interaction of cobalt and manganese species of Co 3 O 4 @CoMn 2 O 4 -NCs enhanced their low-temperature reducibility. Eventually, benefiting from the dual merits of structure and composition, Co 3 O 4 @CoMn 2 O 4 -NCs manifested much better HCHO oxidation performance. This work demonstrates that metal-organic frameworks (MOFs)-derived mixed-metal oxides with hierarchical hollow structure possess promising application perspective for low-temperature HCHO oxidation.
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高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2022
·
IF 9.965
Haomin Wang,Jiang Li,Dun Zhang,Guoqing Wang,Peng Wang
For the optical equipment used in the marine environment, the quality and accuracy of the tests are easily affected by biological fouling. Hence, good anti-fouling performance is crucial for preserving the optical equipment. A new electrochemical chlorination anti-fouling system has been proposed for years and is suitable for underwater optical windows. In this paper, nano Co 3 O 4 electrocatalysts with different morphologies were prepared through the hydrothermal method to study the structure–activity relationship between their electrochemical properties and morphologies. The nanourchin Co 3 O 4 shows the best electrochemical properties resulting from its large surface area . The titanium mesh electrode with nanourchin Co 3 O 4 was used to evaluate the anti-fouling performance. In comparison to commercial dimensionally stable anode electrodes, the developed Co 3 O 4 /titanium mesh electrode has higher catalytic performance, better selectivity , and lower cost. The bactericidal rate can reach 95% in 20 mins and it can effectively inhibit the sedimentation of microorganisms on the glass surface. Therefore, it is a promising strategy to use the nanourchin Co 3 O 4 as an electrocatalyst to protect the underwater optical windows.
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高影响因子
APPLIED SURFACE SCIENCE
·
2021
·
IF 6.707
Zhouyu Tong,Yuxin Bi,Mingliang Ma,Zijian Liao,Weibo Huang,Kwok L. Chung,Yong Ma,Guanglei Wu,Yulong Qu,Chengbo Pan,Yusheng Wang
Novel composite microwave absorption (MA) materials with multiple loss mechanism have attracted considerable attention. In this work, flower-like surface Ni@Co 3 O 4 nanowires were designed and fabricated through chemical reduction method induced by magnetic field, followed by in-situ polymerization, low temperature oil bath and thermal annealing. Then, the Ni@Co 3 O 4 /RGO composites were prepared through a hydrothermal reaction of the Ni@Co 3 O 4 nanowires and graphene oxide suspension. The electromagnetic properties of different loading content samples (15 wt%, 25 wt% and 35 wt%) were measured to investigate the influence of loading content on the MA performance. For the 35 wt% loading sample, the minimum reflection loss (RL min ) value of −60.0 dB was determined at the thickness of 2.3 mm, and the maximum effective absorption bandwidth (EAB, RL < −10 dB) of 4.62 GHz can be achieved when the thickness is 1.6 mm. This research provides a reference for exploiting high-efficient flower-like surface magnetic-dielectric composites in the field of MA.
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高影响因子
ACS Sustainable Chemistry & Engineering
·
2019
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IF 6.97
Xiang Xiao,Mingyong Wang,Jiguo Tu,Yiwa Luo,Shuqiang Jiao
Because of the unprecedented development and popularization of portable electronics, electric vehicles, and smart grid, rechargeable batteries have become one of the hottest topics within worldwide research for the past decade. Among all of the proposed nonlithium-based battery systems, rechargeable aluminum-ion batteries (RAIBs) are considered as a promising candidate due to aluminum’s abundance and safety. Naturally, exploring compatible and high-performance cathode materials for RAIBs becomes a key issue for pushing RAIBs from lab-level to industrialization. In this work, we report a novel high-performance RAIB system using MOF-derived Co3O4@MWCNTs polyhedron composite as cathode. The well-defined morphology of MOF-derived Co3O4 and enhancement brought by MWCNTs allow Co3O4@MWCNTs polyhedrons to deliver an initial discharge capacity of ca. 266.3 mAh g–1, and the reversible specific capacity can reach 125 mAh g–1 at 100 mA g–1 over 150 cycles. The energy storage mechanism has been verified to be a reversible valence-change reaction between Co3O4 and Co. These findings can enlighten future research regrading MOF derivatives as advanced cathode materials for RAIBs.
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高影响因子
NANOTECHNOLOGY
·
2022
·Vol. 33
·期 50
·505402
·
IF 3.953
Wenjing Yu,Shaohua Zhang,Kun Gao,Xiangyun Lin,Yuyang Han,Zhipan Zhang
Co3O4-MoSe2@C nanocomposite has been prepared by a convenient method via combining hydrothermally synthesized MoSe2@C and Co3O4. When catalyzing the hydrogen evolution reaction and oxygen evolution reaction, the catalyst features low overpotentials of 144 mV and 360 mV (both at 10 mA cm−2 current density), respectively. It can also serve as the cathode in the lithium-oxygen battery and the device shows a low charging-discharging overpotential of 1.50 V with a stable performance of over 200 cycles at current density of 1000 mA g−1, shedding light on the design and synthesis of novel multifunctional electrocatalysts for energy conversions.
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高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2022
·
IF 9.965
Dingzhou Xiang,Xuqiang Hao,Zhiliang Jin
Amorphous/crystalline heterostructures show excellent potential in the hydrogen evolution reaction (HER) as they can significantly facilitate surface adsorption and redox reactions. Herein, a unique amorphous Co 2 P/crystalline CoP quantum dots (Co 2 P/CoP QDs) Type-II surface heterojunction was derived from amorphous Co 3 O 4 QDs via phosphorization. The intimate contact between Co 2 P QDs and CoP QDs was conducive to charge transfer, thereby promoting surface reaction kinetics. The unique structure and properties were beneficial to providing more active sites and controlling the electronic structures thus making amorphous/crystalline composites show superior photocatalytic hydrogen (H 2 ) production performance. Additionally, the amorphous Co 2 P QDs had a plethora of unsaturated bonds and abundant defects; the disordered structure led to increased active sites that promoted surface reaction kinetics. Due to the synergistic effect of the quantum confinement of QDs and the surface heterojunction, the charge transfer efficiency of Co 2 P/CoP QDs was extremely high, and high H 2 evolution activity and photostability were achieved. The maximum H 2 generation rate over the Co 2 P/CoP QDs composite reached 11.88 mmol h −1 g −1 with an apparent quantum efficiency (AQE) of 3.88 % at 420 nm, which is roughly 20-times that of the pure Co 3 O 4 QDs. In addition, high photostability was realized; even the photocatalyst that stood for a week reached initial photoactivity. This work offers a novel idea for reasonably establishing amorphous/crystalline photocatalysts to achieve efficient H 2 evolution.
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高影响因子
PARTICLE & PARTICLE SYSTEMS CHARACTERIZATION
·
2018
·Vol. 35
·期 8
·1800049
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IF 4.384
Yun Zhu,Zezhou Yang,Lifei Song,Maoqiang Chi,Meixuan Li,Ce Wang,Xiaofeng Lu
A quick and sensitive detection of ascorbic acid (AA) is essential in the fields of biosensing and disease diagnosis. In this work, an effective approach combined with electrospinning, chemical bath deposition, and calcination process is developed to encapsulate Co 3 O 4 nanoparticle into CeO 2 nanotubes as efficient peroxidase mimics for the detection of AA. The peroxidase-like catalytic activity of the as-prepared Co 3 O 4 @CeO 2 nanotubes is much higher than that of individual Co 3 O 4 nanofibers and CeO 2 nanotubes alone due to the synergistic effect between the two components. Owing to the superior catalytic efficiency of the prepared Co 3 O 4 @CeO 2 nanotubes, a colorimetric route for the rapid and accurate detection of AA with a detection limit of 0.73 × 10 −9 m with a wide linear range from 0 to 0.8 × 10 −6 m is demonstrated. This detection limit is much better than the previous reports based on the enzyme-like catalytic systems. In addition, a good selectivity toward the detection of AA over amino acids, common ions, dopamine, and uric acid is achieved. This study offers a new approach for the fabrication of Co 3 O 4 @CeO 2 nanotubes as sensing platform toward the detection of AA, which presents promising potential applications in biosensing, environmental monitoring, and medical diagnostics.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
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2025
·
IF 13.2
Jiahong Pan,Zherui Wang,Jiajia Luo,Liwen Fan,Xinyun Li,Chenyi Wang,Yanqing Cong,Tong Wei,Shi-Wen Lv
Herein, a simple method for effective treatment of organic wastewater containing ofloxacin is proposed. Specifically, sulfur-doped Co 3 O 4 (abbreviated as S-Co 3 O 4 ) is first prepared and used then as a mediator to activate peroxymonosulfate (PMS). The sulfur doping can facilitate the conversion of low spin state Co to high spin state Co, thereby reducing the work function of Co 3 O 4 to improve internal electron escape probability. Meanwhile, the sulfur doping also induces to form more oxygen vacancies, decreasing interface resistance and accelerating charge transfer. As a result, the activation efficiency of PMS over S-Co 3 O 4 is enhanced. More importantly, the adsorption energy of PMS over S-Co 3 O 4 is reduced after the sulfur doping, leading to generate more S-Co 3 O 4 -PMS* complexes. Due to small activation energy, the S-Co 3 O 4 -PMS* complexes can be easily decomposed into SO 4 − and 1 O 2 . As predicted, the S-Co 3 O 4 -mediated PMS system shows excellent performance in ofloxacin degradation, and the removal efficiency is as high as 96.4 % within 20 min. In the S-Co 3 O 4 -2-mediated PMS system, the contribution rate of active species for ofloxacin degradation follows an order of SO 4 − > 1 O 2 > Co 4+ O > OH . Furthermore, the S-Co 3 O 4 -2-mediated PMS system with good stability exhibits strong removal ability towards other organic pollutants.
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产品关联
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高影响因子
Journal of Materials Chemistry A
·
2025
·
IF 9.5
Mutian Zhang,Ziying Ji,Shijie Pan,Xiang Liu,Wei Zheng,Jiajia Wang,Guobing Ying
In this study, Fe-doped Co3O4 nanoparticles were synthesized using a hydrothermal method followed by ultrasonic cell disruption to enhance the alkaline hydrogen evolution reaction (HER) performance. Through a dual-modification strategy combining elemental doping and morphology engineering, structural characterizations confirmed that Fe doping induces lattice distortions and optimizes the electronic structure, while ultrasonic cell disruption effectively reduces particle size to ~50 nm and increases active site density. The 10Fe-Co3O4 Ultrasonicated Nanoparticles (UNPs) catalyst showed remarkable HER performance, with overpotentials of 210.7 mV and 264.0 mV at 10 and 100 mA/cm2, respectively, and a Tafel slope of 75.2 mV/dec in 1 M KOH. DFT calculations indicate that Fe doping improves water adsorption, lowers energy barriers in the Volmer and Heyrovsky steps, and shifts the d-band center, thereby accelerating HER kinetics. The 10Fe-Co3O4 UNPs catalyst also demonstrated excellent durability, maintaining stable performance over 24 hours under high current densities. This work highlights the potential of Fe-doped Co3O4 as a cost-effective, high-efficiency, non-noble metal-based catalyst for HER, providing valuable insights into catalyst design and advancing sustainable hydrogen production technologies.
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高影响因子
Catalysts
·
2025
·Vol. 15
·期 5
·491
·
IF 4
Hao Yu,Shen Yan,Jiahua Zhang,Hua Wang
Electrocatalytic nitrate reduction reaction (NO3−RR) to ammonia (NH3) presents an alternative, sustainable approach to ammonia production. However, the existing catalysts suffer from poor NH3yield under lower concentrations of NO3−, and the kinetic understanding of bimetal catalysis is lacking. In this study, a Co3O4–modified Cu2+1O nanowire (CoCuNWs) catalyst with a high specific surface area was synthesized to effectively produce NH3from a 10 mM KNO3basic solution. CoCuNWs demonstrated a high NH3yield rate of 0.30 mmol h−1cm−2with an NH3Faradaic efficiency (FE) of 96.7% at −0.2 V vs. RHE, which is 1.5 times higher than the bare Cu2+1O NWs. The synergistic effect between Co3O4and Cu2+1O significantly enhanced both the nitrate conversion and ammonia yield. Importantly, it is revealed that the surface of CoCuNWs is kinetically more easily saturated with NO3−(NO2−) ions than that of Cu2+1O NWs, as evidenced by both the higher current density and the plateau occurring at higher NOx−concentrations. In addition, CoCuNWs exhibit a higher diffusion coefficient of NO3−, being 1.6 times higher than that of Cu2+1O NWs, which also indicates that the presence of Co3O4could promote the diffusion and adsorption of NO3−on CoCuNWs. Moreover, the ATR–SEIRAS analysis was applied to illustrate the reduction pathway of NO3−to NH3on CoCuNWs, which follows the formation of the key intermediate from *NO2−, *NO, *NH2OH to *NH3. This work presents a strategy for constructing dual–metal catalysts for NO3−RR and provides an insight to understand the catalysis from the perspective of the kinetics.
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产品关联
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高影响因子
Sustainability
·
2022
·Vol. 14
·期 20
·13417
·
IF 3.889
Pingshu Leng,Hanbin Wang,Binfeng Wu,Lei Zhao,Yijing Deng,Jinting Cui,Houzhao Wan,Lin Lv
The use of transition metals as bifunctional catalysts for rechargeable zinc-air batteries has recently attracted much attention. Due to their multiple chemical valence states, the cobalt oxides are considered to be promising catalysts for oxygen reduction reaction (ORR) and oxygen evolution reaction (OER). In this work, bifunctional Ag-decorated Co3O4-nitrogen doped porous carbon composite (Co3O4-NC&Ag) catalysts were synthesized by annealing ZIF-67 in N2and O2, respectively, followed by Ag deposition using chemical bath deposition. Due to the decoration of Ag nanoparticles and high specific surface area (46.9 m2g−1), the electrochemical activity of Co3O4increased significantly. The optimized Co3O4-NC&Ag catalysts possessed superior ORR performance with a half-wave potential of 0.84 V (vs. RHE) and OER activity with an overpotential of 349 mV at 10 mA cm−2. The open circuit voltage of the Co3O4-NC&Ag-based zinc-air battery was 1.423 V. Meanwhile, the power density reached 198 mW cm−2with a specific discharge capacity of 770 mAh g−1at 10 mA cm−2, which was higher than that of Pt/C-based zinc-air battery (160 mW cm−2and 705 mAh g−1). At a current density of 10 mA cm−2, the charge-discharge performance was stable for 120 h (360 cycles), exhibiting better long-term stability than the Pt/C&RuO2counterpart.Keywords:zinc air battery;Co3O4;bifunctional catalysts;silver decoration
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高影响因子
ELECTROCHIMICA ACTA
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2017
·
IF 4.798
Lingna Sun,Qingwei Deng,Yongliang Li,Hongwei Mi,Suhang Wang,Libo Deng,Xiangzhong Ren,Peixin Zhang
CoO-Co 3 O 4 heterostructure nanoribbons were successfully sandwiched between reduced graphene oxide (RGO) nanosheets through a facile solvothermal method and sintering process, which used directly as the anode material for lithium ion batteries. The as-prepared ultrathin CoO-Co 3 O 4 nanoribbon/RGO sandwich-like nanostructures (CoO-Co 3 O 4 -RGO) delivers a reversible capacity of 994 mAh g −1 at a current density of 100 mA g −1 after 200 cycles. Even at a high charge-discharge rate of 1000 mA g −1 , CoO-Co 3 O 4 -RGO still demonstrate a reversible capacity of 395 mAh g −1 after 500 cycles. The rate capability of CoO-Co 3 O 4 -RGO evaluated by the ratio of capacity at 100, 200, 500, 1000, 2000, 5000 and 100 mA g −1 after each 10 cycles was about 1210, 1060, 890, 730, 578, 392 and 915 mAh g −1 , respectively. The greatly enhanced performances for CoO-Co 3 O 4 -RGO may be ascribed to the synergistic effects: The multicomponent generates hybridizing advantages; The mutual influence of both CoO-Co 3 O 4 nanoribbons and RGO nanosheets decreases the aggregation; The two-dimensional (2D) nanoribbons with the short lithium ion diffusion and 2D RGO sheets as conductive network built an efficient three dimensional (3D) storage active material.
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危险品化学品经营许可证（带存储）