CHEMICAL RESEARCH IN CHINESE UNIVERSITIES
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2026
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IF 4.7
Liang Yujie,Zhang Jiaying,Lao Xinyu,Wang Zichenlu,Sun Hong,Wang Jingjing,Zheng Yingying,Pan Jiaqi,Li Chaorong,Cao Jun
Rational tuning electronic configuration of CoO is important for accelerating sluggish oxygen evolution reaction (OER) kinetics. This work reports a simultaneous incorporation of highly electronegative fluorine (F) and high-valence molybdenum (Mo) into CoO nanoneedles (denoted as FMo-CoO). The dual-doping strategy boosts Co 3+ content and compressive strain, which strengthens Co—O bond covalency and enables a lattice-oxygen-mediated (LOM) pathway during OER catalysis. Concurrently, the nanoneedle morphology coupled with F/Mo co-doping synergistically enhances surface properties, granting FMo-CoO exceptional superhydrophilicity and superaerophobicity. As a result, FMo-CoO achieves outstanding OER performance in alkaline media, requiring only overpotential of 287 mV at 10 mA/cm 2 . This work provides a novel method to boost the OER performance of CoO by anion and cation ions doping.
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DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
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2018
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IF 4.229
Xiaona Ren,Fang Hou,Fangyuan Wang,Xiangwen Zhang,Qingfa Wang
We report a CeO 2 incorporated cobalt oxide electrode with abundant nano-sized interfaces. The as-prepared heterostructures exhibit remarkable oxygen evolution reaction (OER) activity and excellent stability, surpassing the pristine cobalt oxide and the state-of-art RuO 2 . Further DFT calculations and experimental results indicate that the improved OER performance of CoO-CeO 2 heterostructures originates from the hierarchically porous structure , large surface area and high electron density around Co sites. The armouphous phase is formed during OER test due to surface Ce leaching, which can further promoted the performance of the hybrids. This work elucidates the cooperative effects and in situ transformation of CeO 2 -incorporated cobalt oxide in water oxidation , providing a valuable guideline for designing electrocatalysts .
研究领域:
材料科学
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电化学
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DOI
高影响因子
CERAMICS INTERNATIONAL
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2016
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IF 2.758
Lei Chen,De Feng Zhou,Yuan Wang,Xiao Fei Zhu,Jian Meng
Ce 0.8 Nd 0.2 O 1.9 (NDC) and La 0.8 Sr 0.2 Ga 0.8 Mg 0.2 O 3-δ (LSGM) electrolytes were prepared using a sol-gel method. NDC-LSGM composite electrolytes were subsequently prepared by adding 5% ( w , mass fraction) precalcined LSGM powders to NDC sols. The electrolyte materials of NDC-Co and NDC-LSGM-Co were obtained by adding 1 mol% CoO to NDC sols and NDC-LSGM composite electrolytes, respectively. The microstructure and phase composition of the pellets were characterized using X-ray diffraction (XRD), field-emission scanning electron microscopy (FE-SEM), and energy dispersive X-ray spectroscopy (EDS). The electrical conductivities of the pellets were measured using alternative current (AC) impedance spectroscopy . The results indicate that a single perovskite phase is observed for the LSGM ceramic, while NDC-Co, NDC-LSGM and NDC-LSGM-Co have a cubic fluorite structure similar to that of NDC. As a sintering aid , CoO can further promote grain growth and increase relative density (＞95%) of the NDC-LSGM composite electrolyte. The enhancement of the total conductivity is primarily attributed to the large increase in the conductivity of the grain boundary. However, the slight decrease of the grain boundary conductivity of the NDC-LSGM-Co electrolyte is caused by the presence of trace amounts of impurity phases in the grain boundaries.
研究领域:
材料科学
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固体离子学
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陶瓷材料
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能源材料
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电化学
✓ 已验证
DOI
高影响因子
APPLIED SURFACE SCIENCE
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2026
·
IF 6.6
Binhao Zhang,Bin He,Guangliang Chen,Kunyan Wang,Tongtong Li,Ying Tao,Jun Huang,Peisong Tang
A grape-like FeOOH-Nb 2 O 5 -CoO heterostructure engineered on the DBD plasma-modified Co foam for OER. • Plasma treatment endows a special 3D physio-chemical interface for seawater splitting . • The overpotential of FeOOH- Nb 2 O 5 -CoO/PCF for transferring j 1000 is only372 mV 1 M KOH. • DFT calculations disclose the FeOOH-CoO heterointerface lowers the OER energy barrier. Seawater electrolysis represents an attractive approach for producing the high-purity hydrogen. Nevertheless, the high concentration of chloride ions (Cl − ) in seawater leads to severe corrosion of electrodes, posing a major obstacle to the widespread adoption of seawater splitting for green hydrogen generation. Herein, a grape-like iron-niobium-cobalt metal oxide (FeOOH-Nb 2 O 5 -CoO/PCF) is in-situ engineered on the cobalt foam which is modified by a dielectric barrier discharge (DBD) plasma (PCF). Noted that the plasma treatment endows the PCF substrate with critical properties for engineering electrocatalysis: the obtained 3D hierarchical architecture facilitates electrolyte access, the caused interfacial bonding ensures an excellent electrocatalytic durability, and the enhanced surface chemistry accelerates gas bubble release. The optimized FeOOH-Nb 2 O 5 -CoO/PCF electrode achieves an industrial-level current density of 1000 mA cm −2 at a low overpotential of 372 mV in 1 M KOH, and merely 317 mV for transferring a current density of 100 mA cm −2 ( j 100 ) in an aggressive alkaline seawater. Moreover, the FeOOH-Nb 2 O 5 -CoO/PCF maintains an ultra stability for 100 h (1 M KOH) and 317 h (alkaline seawater) with chronoamperometry ( I-t ) tests. Based on Density Functional Theory (DFT) calculations, the constructed heterointerface between CoO and FeOOH phase effectively modulates the electronic configuration of catalyst and lowers the energy barrier of the rate-determining step with the synergistic effect of Nb 2 O 5 , thereby synergistically promoting the oxygen evolution reaction (OER). This work offers a viable pathway for designing highly active and stable electrocatalysts fitting for seawater splitting. A grape-like FeOOH-Nb 2 O 5 -CoO heterostructure is in-situ hydrothermally fabricated on DBD-plasma-etched cobalt foam for a high efficient OER wtih alkaline seawater. In 1 M KOH, it achieves 372 mV at an industrial-level 1000 mA cm −2 with a Tafel slope of 53.8 mV dec −1 . In an alkaline seawater, it requires only 317/359/391 mV at 100/300/500 mA cm −2 . At 500 mA cm −2 , a long-term stability reaches 100 h in 1 M KOH and 317 h in seawater. DFT confirms interfacial Co sites dominate OER activity, while Nb 2 O 5 provides anti-Cl − corrosion protection. This work offers a DBD-assisted pathway for engineering electrocatalysts to achieve a robust seawater electrolysis. Download: Download high-res image (177KB) Download: Download full-size image
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DOI
高影响因子
COMPOSITES PART B-ENGINEERING
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2022
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IF 11.322
Zizhao Ding,Zuojuan Du,Yu Liu,Qiancheng Zhang,Zixiang Zhao,Mingming Hou,Xiangyu Wang,Yusuf Abdullahi Hassan,Xiaozhong Huang,Jianjing Yue,Ailiang Chen,Yutian Ma,Sujun Lu
Graphene-based microwave absorbing (MA) materials have been extensively studied due to their excellent physical properties. However, very few research has successfully achieved broader frequency MA materials while ensuring good wave absorption properties . In this work, we obtained reduced graphene oxide (RGO) modified with magnetic Co x O y nanoparticles by assembling Co nanoparticles onto graphene with a simple hydrothermal method followed by pyrolysis at different temperatures, possessing wideband broad bandwidth microwave absorbing capability. The electromagnetic parameters , attenuation constants , and impedance matching of the Co x O y /RGO composites pyrolyzed at different temperatures were analyzed to determine the optimum pyrolysis temperature for the Co x O y /RGO composites. After heat treatment at 500 °C, a large number of CoO/Co 3 O 4 interfaces appeared. The minimum reflection loss of the sample reaches −67.2 dB and the effective absorbing bandwidth (EAB) (RL < −10 dB) is 9.1 GHz, covering the whole X, Ku, and K bands. It is worth noting that such a good microwave absorption performance is attributed to the fact that the structure of cobalt nanospheres can adjust the effective dielectric constant of the material, and the existence of CoO can promote dipole polarization and interfacial polarization process to improve impedance matching, so as to obtain a wider absorption effect.
研究领域:
材料科学
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电磁学
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产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2024
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IF 9.4
Qiaohong Su,Qingcui Liu,Pengyue Wang,Juan Ding,Jiulin Wang,Yudai Huang
High overpotential and low stability are major challenges for hydrogen evolution reaction (HER)/oxygen evolution reaction (OER). Tuning the electronic structure of catalysts is regarded as a core strategy to enhance catalytic activity. Herein, we report CuO x /Cu nanorod skeleton supported Ru doped cobalt oxide/nitrogen-doped carbon nanocomposites (Ru-CoO/NC/CuO x /Cu, denoted as RCUF) as bifunctional catalysis. The one-dimensional/three-dimensional (1D/3D) nanostructure and defect-rich amorphous/crystalline phases of RCUF facilitates active site exposure and electron transport. Experimental characterization and density functional theory (DFT) calculation results indicate that Ru doping can optimize the electronic structure, which accelerates the water dissociation process and reduces the Gibbs free energy of the reaction intermediates. As expected, the optimal RCUF-900 exhibits low overpotential (25/205 mV at 10 mA cm −2 ) and high stability (100/100 h) for HER/OER. RCUF-900 has low voltage (1.54 V at 10 mA cm −2 ) and high stability (100 h) for overall water splitting. This work provides new insights into the design of advanced catalysts for overall water splitting.
研究领域:
材料科学
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催化化学
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产品关联
DOI
PubMed
高影响因子
COMPOSITES SCIENCE AND TECHNOLOGY
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2022
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IF 9.879
Dongwei Xu,Yumei Ren,Xiaoqin Guo,Desheng Feng,Run Yang,Biao Zhao,Rui Zhang
Multiscale and multicomponent design has been recognized as one of the most effective strategies to improve absorption performance of microwave absorption materials . Herein, the magnetic functional composites aerogels containing core-shell CoO@Co nanoparticles , porous graphene nanosheets (PGN) and carbon nanotubes (CNTs) were successfully fabricated by combining solvothermal method and subsequently calcination processes. The results demonstrated that the calcination temperatures determined the chemical composition (CoO, α-Co, β-Co and CNTs) and complex structure (core-shell and porous characteristics) of the resultant composites aerogels, which affected the magnetic properties and electromagnetic parameters . Interestingly, at the calcination temperature of 650 °C, CNTs were uniformly grown on the surface of porous graphene nanosheets under self-generated cobalt metal catalyst . As expected, the paraffin-based composites aerogels of S650 samples with 15 wt% filling contents presented outstanding microwave absorption performance (MAP) in view of both minimum reflection loss ( RLmin , −63.39 dB, d = 3.4 mm) and the effective absorption bandwidth ( EAB , RL values below −10 dB, 6.5 GHz, d = 2.4 mm). Considering these excellent properties in mind, the composites aerogels with unique complex structures hold great promise as synergistic microwave absorbers for electromagnetic pollution .
研究领域:
材料科学
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电磁学
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DOI
高影响因子
ChemElectroChem
·
2021
·Vol. 9
·期 3
·e202101566
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IF 4.59
Xinlin Chen,Ran Jiang,Cunku Dong,Hui Liu,Jing Yang,Xiwen Du
Graphical One-dimensional nanoneedles : An efficient catalyst for overall water splitting is prepared by modulating the electron density of Co 2+ /Co 3+ via the formation of a CoO−Co 9 S 8 heterostructure. It is a great challenge to synthesize efficient electrocatalysts for overall water splitting, especially non-noble metal catalysts. Herein, one-dimensional polycrystalline nanoneedles composed of CoO−Co 9 S 8 nano heterostructures, in situ grown on carbon fiber paper are prepared for efficient overall water electrolysis. Due to strong electronic coupling, charge densities of Co 2+ /Co 3+ in Co 9 S 8 and Co 2+ in CoO are favorably modified at the interface of CoO and Co 9 S 8 , resulting in optimized reaction intermediates absorption and greatly enhanced bifunctional HER/OER activities. CoO−Co 9 S 8 /CFP delivers a current density of 10 mA cm −2 in alkaline electrolyte at overpotentials of 184 mV and 270 mV for HER and OER, respectively. When used as electrocatalyst for overall water splitting, it needs a low cell potential of 1.66 V to realize water electrolysis at 10 mA cm −2 . This work provides a new strategy to tune the electronic structures of transitional metal active sites via constructing nano heterostructures for efficient water electrolysis.
研究领域:
材料科学
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电化学
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DOI
高影响因子
CERAMICS INTERNATIONAL
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2025
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IF 5.6
Hongyu Zhang,Jing Wu,Jielun Li,Tongyang Li,Zhuhui Qiao
In this study, CoO was used as a toughening phase to fabricate CoO-doped Si 3 N 4 ceramics by spark plasma sintering. The effects of different temperatures (1700°C, 1750°C,1800°C,1850°C) and CoO contents(0 wt%, 5 wt%, 10 wt%, 15 wt%) on the phase composition, microstructure, mechanical properties, and tribological properties of Si 3 N 4 ceramics were systematically investigated. The X-ray diffraction analysis revealed the formation of a new phase CoSi during the sintering process. Experimental results showed that the samples with 10 wt% CoO resulted in a 30% increase in the fracture toughness of the samples at a sintering temperature of 1700°C. Furthermore, at a sintering temperature of 1750°C, 5 wt% CoO increased the hardness by 12% and 10 wt% CoO increased the flexural strength by 51%. The doping of CoO improves the wear resistance of the material, and wear rate reduced by 71% compared to undoped CoO. Finally, first-principles calculations confirmed the interface stability of Si 3 N 4 -CoSi heterojunction. This study provides a new technological path for the development of Si 3 N 4 ceramic bearing materials with high toughness and excellent wear resistance.
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产品关联
DOI
高影响因子
Industrial Chemistry & Materials
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2024
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IF 0
Yihan Zhang,Yiliyasi Baikeli,Zehong Gao,Xamxikamar Mamat,Longyi Chen
Overuse of acetaminophen (APAP) has become a severe societal burden in recent years. The rapid and reliable detection of urinal APAP concentration can offer certain guidance for better management of APAP usage. This study explored the electrochemical sensing application of a novel electrocatalyst prepared from the biomass of Elaeagnus Angustifolia gum. The biomass was first activated by ferric chloride to form a porous biomass carbon material (FBC). Then synthesized cobalt oxide cracked nanoplate by alkali precipitation and calcination approach were hybridized onto the biomass carbon via facile sonication process. The electrocatalyst of CoO-FBC was characterized by scanning electron microscopy (SEM) and energy-dispersive X-ray spectroscopy (EDS), element mapping, transmission electron microscopy (TEM) and high resolution TEM, X-ray photoelectron spectroscopy (XPS), X-ray powder diffraction (XRD), thermo gravimetric analysis (TGA), Raman spectroscopy, and nitrogen adsorption/desorption analysis. CoO-FBC modified glassy carbon electrode (CoO-FBC/GCE) was characterized by various electrochemical methods including cyclic voltammetry (CV), electrochemical impedance spectroscopy (EIS) and differential pulse voltammetry (DPV). CoO-FBC/GCE sensor was used to measure APAP in pH 7.0, 0.1 M phosphate buffered saline (PBS) with two linear sensing range from 1 μM to 10 μM and 10 μM to 100 μM, sensitivity of 25.89 μA μM-1 cm-2 and 10.04 μA μM-1 cm-2, and limit of detection of 0.46 μM. The unavoidable inteference in measuring APAP is the inherent uric acid in urine. Uric acid and APAP exhibited adjacent and sometimes unseparable voltametric peak. This CoO-FBC/GCE sensor is capable to distinguish APAP from uric acid and to measure APAP in human urine sample with good recovery. This CoO-FBC/GCE sensor has promising application in clinical diagnosis and environmental detection.
研究领域:
分析化学
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生物医学工程
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环境科学
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临床诊断
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DOI
ChemElectroChem
·
2019
·Vol. 6
·期 5
·1574-1581
·
IF 3.975
Pu Wang,Shuang Hou,Fang Pang,Miao Liu,Yanxin Li,Tiezhong Liu,Yizhen Luo,YaMeng Fan,Lingzhi Zhao
Graphical In the mill : Unique hierarchical mosaic-structure SiO x /C@CoO nanosheets, with both SiO x and graphite particles embedded in a CoO layered structure, are successfully fabricated through a high-energy ball-milling process and through a one-step hydrothermal process to form a 3D hierarchical mosaic structure. The unique combination of the CoO and SiO x /C can accommodate the large volume changes and retain the structural integrity of the nanosheets, maintaining the cycling stability and rate capability of SiOx/C@CoO electrode materials. Unique hierarchical mosaic-structure SiO x /C@CoO nanosheets were successfully synthesized from SiO x /C nanospheres embedded in CoO nanosheets through a high-energy ball milling and hydrothermal self-assembly process. The SiO x /C@CoO material exhibited good cyclic performance with a reversible discharge capacity of 1079 mAh g −1 over 250 cycles at a current density of 1000 mA g −1 . It also displayed an excellent rate capability (with an average specific reversible discharge capacity of 777.8 mAh g −1 at 2000 mA g −1 and 480 mAh g −1 at 5000 mA g −1 ). The stable skeleton structure of SiO x /C-embedded CoO nanosheets and the synergistic effect between the two materials should be responsible for the improvement of the lithium storage. This work proposes a feasible approach to promote CoO application in lithium-ion batteries.
研究领域:
材料科学
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能源科学
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DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
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2023
·Vol. 34
·期 19
·1468
·
IF 2.8
Xiao Xibing,Chen Huan,Tang Jingzhou,Wang Lianbang
The lithium metal anode has been considered the “holy grail” of lithium batteries, but its safety and stability have been compromised by the formation of unstable dendrites. In this study, a CoO@PAN composite with a core-shell structure was prepared via a simple calcination method and used as a protective layer on the surface of lithium metal tablets. The treated lithium tablets exhibited improved electrochemical properties and cycle stability. Symmetric batteries with the CoO@PAN protective layer demonstrated better cycle stability and showed a 300-hour cycle life, compared to only 100 h for pristine lithium tablets. Ex-situ morphology characterization confirmed that the CoO@PAN protective layer could passivate the electrode surface and mediate smooth Li deposition. Galvanostatic intermittent titration technique (GITT) and activation energy (Ea) tests revealed that the CoO@PAN layer had an improved Li + /Li transformation kinetics, which reduced the formation of dead lithium and dendrites. In LiFePO 4 full batteries, the capacity retention of treated lithium tablets increased by 35% after 1000 cycles of consistent operation at a 10 C ultrahigh rate. These results suggest that this effective strategy offers a new perspective on the design of novel protective layers for the next generation of lithium metal batteries.
研究领域:
材料科学
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储能技术
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电化学
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锂电池
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DOI
高影响因子
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