METALLURGICAL AND MATERIALS TRANSACTIONS B-PROCESS METALLURGY AND MATERIALS PROCESSING SCIENCE
·
2024
·
IF 2.4
Liu Zhiqiang,Li Hui,Wang Zhiteng,Li Xiaobing,Lan Huixin,Zhu Zhenhe,Zhuang Yi,Wu Yuchen,Li Jiajia,Yao Huan,Gao Runbo
Efficient and stable lithium-ion batteries (LIBs) have garnered considerable attention; yet, the development of anode electrode materials continues to pose substantial challenges. While CoO electrode material boasts an ideal specific theoretical capacity, it is not without drawbacks, including significant volume expansion and concerns over safety performance, which hinder its viability as an anode material. In this research, we synthesized CoO/Co 3 O 4 through a straightforward secondary hydrothermal treatment that locally oxidizes CoO, simultaneously creating oxygen vacancies. The incorporation of oxygen vacancies enhances the material’s internal conductivity and expedites the diffusion of electrons and ions, culminating in superior rate performance. Furthermore, the heterojunction structure diminishes the diffusion barrier, significantly enhancing the electrode’s reaction kinetics and overall electrochemical performance. At a modest current density of 0.1 A g −1 , the CoO/Co 3 O 4 composite demonstrates enhanced cycling stability, delivering a capacity of 1022 mAh g −1 after 100 cycles. Remarkably, even at an elevated current density of 1 A g −1 , it sustains a capacity of 768.8 mAh g −1 over 400 cycles. The method of creating oxygen vacancies via autoxidation may pave the way for the advancement of multivalent oxide anode materials.
研究领域:
材料科学
·
能源存储
✓ 已验证
DOI
高影响因子
ELECTROCHIMICA ACTA
·
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.
研究领域:
材料科学
·
能源存储
✓ 已验证
DOI
高影响因子
CHEMOSPHERE
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2018
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IF 4.427
Jinye Niu,Yi Xie,Haiqiong Luo,Qian Wang,Yongkui Zhang,Yabo Wang
The treatment of antibiotic-containing wastewater is of great importance due to the potential threats of antibiotics to human and the ecosystem. We reported the preparation of cobalt oxide loaded graphitic carbon nitride (CoO/g-C 3 N 4 ) by an impregnation-calcination method for tetracycline (TC) removal from aqueous solution. The developed CoO/g-C 3 N 4 exhibited high adsorption capacity and fast adsorption kinetic for TC due to the complexation of TC with surface loaded CoO. In particular, 7%CoO/g C 3 N 4 3 sample presented a maximum TC adsorption capacity of 391.4 mg g −1 . It was found that Langmuir and pseudo-second order kinetic models fitted TC adsorption process well. Further photocatalytic studies showed that CoO loaded g-C 3 N 4 was active for TC photodegradation , although the photocatalytic reaction rate constant was lower than that of native g-C 3 N 4 . CoO nanoparticles loading on g-C 3 N 4 played the major role of adsorption sites rather than cocatalyst for photocatalysis . We believe that the developed CoO/g-C 3 N 4 could be a potential adsorptive photocatalyst for antibiotic pollutants removal from wastewater.
研究领域:
环境科学
·
材料科学
✓ 已验证
DOI
PubMed
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2021
·
IF 5.316
Yang Zhu,Tongfeng Cai,Huangping Rui,Xiangyao Gu,Xueqin Mu,Yu Tong,Haibao Duan,Changyun Chen,Suli Liu,Shichun Mu
The surface configuration of low‐cost spinel oxides for oxygen evolution reaction (OER) can significantly affect the electrochemical behavior by generating a thin oxyhydroxide layer and other structures on the surface. Herein, we design and construct phosphorus (P)-activated ~1.0 nm ultrathin CoO nanosheets (devoted as P x -CoO NSs) with enriched P-O bonds and high valence state Co active sites, which is beneficial to the OER process due to the balance with Co 3+ and oxygen vacancies on the reconstructed surface/interface. In addition, such an ultrathin nanosheet structure is also benefit to expose more active sites and improve the intrinsic electronic conductivity. As a result, the surface reconstructed P x -CoO NSs show superior OER activity compared with pure CoO and IrO 2 as benchmark. Furthermore, P 1 -CoO NSs demonstrate intrinsically high mass activity of 6.8 A g Co −1 at an overpotential of 270 mV, large turnover frequency of 0.0024 s −1 at an overpotential of 300 mV, and strong cycling stability in 0.1 M KOH solutions. Structural analysis further reveals that, as compared with CoO, the P-substitution not only induces the surface reconstruction into active Co oxyhydroxides under OER conditions, but also enhances the reaction kinetics. Undoubtedly, this work enriches the ways to prepare high-performance transition-metal-oxide-based catalyst for practical applications.
研究领域:
材料科学
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电化学
·
催化
✓ 已验证
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
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2025
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IF 13.2
Yu Wang,Hang Zhang,Dingmei Han,Meiyu Liu,Binbin He,Yun Zu
Cobalt (Co)-based zeolite catalysts are promising alternatives to replace expensive Pt- and toxic Cr-based catalysts for direct propane dehydrogenation (PDH). However, identifying the interaction between Co species and surface Si-hydroxyls of siliceous zeolites has been an inevitable challenge to realize the controllable construction of the Co species as dehydrogenation sites. Herein, we have fabricated a series of Co/Si-Beta(m-n) catalysts by using the dealuminated Si-Beta zeolites with “on-purpose” quantifying different type of Si-hydroxyls, involving geminal silanols ( g -SiOH), vicinal silanols ( v -SiOH) and silanol nests ( n -SiOH). In comparison to ultra-small CoO x nanoparticles (< 1.0 nm) directly trapped by the n -SiOH structure, a moderate interaction was built between tetrahedrally-coordinated divalent CoO x nanoparticles (∼4.5 nm) and external n -SiOH structure, resulting from partial migration and aggregation of initial CoO x species preferentially captured with g -/ v -SiOH structures during H 2 reduction. Given this, a representative Co/Si-Beta(500–12) catalyst exhibited a high catalyst productivity of 29.22 mol/g-catalyst (the product of initial reaction rate and the inverse of deactivation coefficient) with about 96 % propylene selectivity. In-situ FTIR spectra further revealed that such superior PDH performance was attributable to the moderately interaction of defined Si-O-Co structure that could be conducive to form the 2-propyl intermediate product, supporting the production of propylene and H 2 . These findings provide a novel inspiration for the development and optimization of low-cost, ecofriendly and advanced PDH catalysts.
研究领域:
催化化学
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2024
·
IF 8.3
Ding Zhu,Kuandi Wang,Xiangcun Li,Xinhong Qi,Helong Jiang,Fangyi Chu,Guocui Cai,Qiao Hou,Xuri Wang,Gaohong He
The long-term stability of Li–S batteries is significantly compromised by the shuttle effect and insulating nature of active substance S, constraining their commercialization. Developing efficient catalysts to mitigate the shuttle effect of lithium polysulfides (LiPSs) is still a challenge. Herein, we designed and synthesized a rose-like cobalt–nickel bimetallic oxide catalyst NiCo2O4–OV enriched with oxygen vacancies (OV) and verified the controllable synthesis of different contents of OV. Introducing the OV proved to be an efficient approach for controlling the electronic structure of the electrocatalyst and managing the absorption/desorption processes on the reactant surface, thereby addressing the challenges posed by the LiPS shuttle effect and sluggish transformation kinetics in Li–S batteries. In addition, we investigated the effect of OV in NiCo2O4 on the adsorption capacity of LiPSs using adsorption experiments and density functional theory (DFT) simulations. With the increase in the level of OV, the binding energy between the two is enhanced, and the adsorption effect is more obvious. NiCo2O4–OV contributes to the decomposition of Li2S and diffusion of Li+ in Li–S batteries, which promotes the kinetic process of the batteries.
研究领域:
材料科学
·
能源化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
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2024
·
IF 8.1
Asma A. Alothman,Jafar Hussain Shah,Mehar Un Nisa,Saikh Mohammad,Abdul Ghafoor Abid,Muhammad Usman,Muhammad Adnan
The development of long-lasting, cost-effective, and efficient electrocatalysts is critical for obtaining exceptionally productive electrocatalytic hydrogen evolution and oxygen evolution reactions via water splitting in industrial settings, particularly for the generation of renewable hydrogen (H 2 ). In this study, the homogeneous integrated electrode (FeP/Co 3 O 4 /CF) is successfully produced using a facile pre-oxidation process that turns porous foams made of cobalt into a separate cobalt supply. The resultant materials are characterized via different analytical techniques like X-ray diffraction analysis (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), elemental mapping and BET to confirm the structural, morphological, elemental and textural properties. This well-built integrated electrode is made of chemically connected FeP, Co 3 O 4 , and Co foam, making it an extremely active, long-lasting, and adaptable catalyst. The FeP/Co 3 O 4 /CF nanocomposite electrode has obtained 10, 500, and 1000 mAcm −2 current densities at overpotentials of 52, 148, and 356 mV respectively for hydrogen evolution reaction (HER) and 192, 278, and 336 mV, respectively for the oxygen evolution reaction (OER). The exceptional performance can be attributed to the creation of an in situ tightly bound heterojunction between FeP and Co 3 O 4 . As a result, the FeP/Co 3 O 4 /CF integrated electrode is a highly promising choice for widespread application in industrial water electrolysis. Its self-supporting construction, integrated design, incorporation of phosphides, capacity to manage large current densities, and remarkable performance even when subjected to high-temperature electrolysis conditions are notable features.
研究领域:
材料科学
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电化学
✓ 已验证
产品关联
DOI
高影响因子
ENERGY CONVERSION AND MANAGEMENT
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2025
·
IF 10.9
Tiantian Yan,Bachirou Guene Lougou,Boxi Geng,Boshu Jiang,Danni Ma,Shuo Zhang,Azeem Mustafa,Wei Wang,Achraf Ghorbal,Piotr Łapka,Yong Shuai
Thermochemical energy storage offers high energy density and efficiency for concentrated solar power systems, making it a promising solution for sustainable energy storage. Cobalt oxide is particularly attractive for thermochemical energy storage due to its high energy storage capacity and excellent cycling stability. However, its performance is limited by redox thermal hysteresis and a significant temperature gap between reduction and oxidation processes. To address these challenges, this study investigates the effect of copper, manganese, and iron doping on cobalt oxide to enhance its solar light absorption and energy storage properties. The doped compounds were synthesized using the sol–gel method and thoroughly characterized using X-ray diffraction, scanning electron microscopy, Fourier transform infrared spectroscopy, thermogravimetric analysis and differential scanning calorimetry, and ultraviolet–visible spectroscopy. Key performance metrics, including oxygen storage capacity, energy storage density, and redox thermal hysteresis, were systematically analyzed. Among the tested materials, copper doping at x = 0.5 was most effective, reducing thermal hysteresis from 37 ℃ to 28 ℃ and enhancing solar absorption by 78 %. These improvements are attributed to increased oxygen vacancies and modified cation valence states, which enhance redox kinetics and light-harvesting efficiency. Additionally, the copper-doped cobalt oxide demonstrated excellent cycling stability over 20 redox cycles, highlighting its potential for high-efficiency thermochemical energy storage applications. This study provides valuable insights into the design and optimization of advanced thermochemical energy storage materials, contributing to the development of next-generation renewable energy storage technologies.
研究领域:
材料科学
·
可再生能源
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF CATALYSIS
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2020
·
IF 7.888
Pengju Yang,Qi Zhang,Zonglin Yi,Jian Wang,Hengquan Yang
The selective reduction of carbon dioxide (CO 2 ) into fuels and chemicals is expected to play a key role in achieving a carbon–neutral sustainable energy economy. Activation of CO 2 is the most important step in this process. As the electron transfer to CO 2 is the rate-limiting step for CO 2 activation, it is significant to modulate the electronic structure of CO 2 reduction catalysts to enhance their activities. However, the intrinsic relationships between electronic properties of catalysts and their catalytic activities remains somewhat unclear, which limits the rational design of highly-efficient CO 2 reduction catalysts. Herein, a catalyst-insulator–metal system consisting of Al as an electron-donor material was designed to modulate the electronic structure of cobalt oxide (Co 3 O 4 ) catalyst. The electrons in Al can be efficiently tunneled to Co 3 O 4 across an ultrathin self-formed Al 2 O 3 insulating layer. Experimental and theoretical results undoubtedly confirm that high electron density on Co 3 O 4 favours the adsorption and activation of CO 2 , while lowers the energy barrier for the formation of COOH* and especially lowers the desorption energy barrier of CO* intermediates, thereby significantly accelerating the reaction kinetics of CO 2 -to-CO photoreduction. The turnover frequency per Co atom of Co 3 O 4 /Al 2 O 3 -Al is much higher than that of Co 3 O 4 . The apparent quantum yield (AQY) of Co 3 O 4 /Al 2 O 3 -Al catalyst highly reaches 3.8% at 420 nm, which is superior to those of most reported catalysts. Besides, the increase in electron density on Co 3 O 4 can effectively inhibit the competing hydrogen evolution reaction. The selectivity of CO increases from 57.9% for Co 3 O 4 to 82.4% for Co 3 O 4 /Al 2 O 3 -Al. Significantly, the catalytic efficiency can be rationally tuned through controlling the content and particle size of Al. This work stablishes the links between the electronic structure of catalysts and their catalytic activities toward CO 2 reduction reaction. Moreover, this Al 2 O 3 -Al structure reported here, may be used as an unprecedented platform for the electronic effect study of other heterogeneous catalysts.
研究领域:
化学
·
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
CARBOHYDRATE POLYMERS
·
2021
·
IF 9.381
Chen Hou,Linhui Fu,Yang Wang,Wenqiang Chen,Fang Chen,Sufeng Zhang,Jianzhi Wang
Smart nanomaterials that can simultaneously detect and eliminate contaminants in water environment are significant for health protection. To achieve such goal, Co-MOF-74 was in-situ assembled on regenerated cellulose membranes followed by calcination process, thus achieving dual-functional Co 3 O 4 /cellulose derivative membrane (Co 3 O 4 /CDM) catalyst. The Co 3 O 4 morphology was readily controlled by further recrystallization of the deposited MOF precursor. Combining the high enrichment ability of cellulose membrane and outstanding peroxidase-active of Co 3 O 4 , the fast color reaction for phenol was accomplished within 10 min by Co 3 O 4 /CDM with the assistance of H 2 O 2 and 4-aminoantipyrine (4-AAP). Moreover, the Co 3 O 4 /CDM also portrayed an excellent degradation property for phenol elimination via sulfate radical-advanced oxidation processes (SR-AOPs). The degradation efficiency of phenol reached 93% in 20 min, and the possible mineralization mechanism was proposed based on the XPS and LC-MS analysis. Thus, Co-MOF-74 derived Co 3 O 4 /CDM shows excellent properties in aiding the colorimetric detection and degradation of phenol in aqueous solutions.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2020
·
IF 9.038
Jianbo Wang,Juan Lv,Mingxing Zhang,Miqi Tang,Qi Lu,Yufei Qin,Yan Lu,Bo Yu
LiCoO 2 is still the most extensively used cathode material in Li-ion battery for portable electronics currently. The increasing usage of electronics has resulted in the growing discard of LiCoO 2 with the stream of its spent battery. Current recycling approaches for LiCoO 2 from spent batteries are dominantly based on hydrometallurgy and pyrometallurgy , which usually require multiple complicated steps and involve the use of high temperature or harmful chemicals, like acids and alkalis. There remains an urgent need for green and simple processes. Here we report a single step approach based on suspension electrolysis to directly recycle LiCoO 2 in one reactor at atmospheric condition without any usage of acid and alkalis. The electrolyte of the suspension electrolysis system is only comprised of NH 4 HCO 3 , NH 4 2 SO 3 and NaF . The reaction system of LiCoO 2 leaching in the anode region and simultaneously re-synthesizing in the cathode region in the electrochemical system is established. Mechanism analysis indicates that NH 4 + only serves as a provider for complexing agent of NH 3 and is virtually not consumed. This work provides potentially meaningful strategies for recovering LiCoO 2 in a shorter procedure and an environmentally friendly manner.
研究领域:
材料科学
·
环境科学
·
电化学
✓ 已验证
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）