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
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DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2026
·
IF 9.6
Fuxin Wang,Guojun Lv,Jiande Hu,Zixiang Li,Xupeng Yang,Shengnan Xu
While electronic promoters are extensively employed to boost the reactivity of host catalysts, they frequently suffer from instability due to migration and leaching. To address this, confinement within the host catalyst has emerged as an effective strategy, with the specific location of confinement being a critical determinant of the promoter's effectiveness. Herein, we demonstrated that lattice-confining atomic Mn into the Co 3 O 4 lattice could effectively weaken the Co O covalency, thereby boosting the selective oxidation of toluene to benzaldehyde. The incorporated Mn, serving as an electronic promoter, formed oxygen-bridged Co-O-Mn bonds, which directly accounted for the attenuation of Co O covalency and the enhanced catalytic oxidation reaction efficiency. Among the atomic Mn-confined spinel Co 3 O 4 samples, the synthesized 0.5Mn-Co 3 O 4 sample exhibited the most outstanding performance, achieving a 79.2% toluene conversion and a 73.9% benzaldehyde selectivity within 6 h of reaction. This eminent catalytic performance was primarily attributed to the Mn-induced weakening of Co O bond covalency, which was accompanied by an increased specific surface area, a higher oxygen vacancy concentration due to lattice expansion, and enhanced dynamic lattice oxygen cycling facilitated by the lattice-confined Mn promoter. According to quenching experiments and in-situ Fourier transform infrared (in-situ FTIR) characterizations, the possible dynamic lattice oxygen cycling reaction mechanism was proposed over the oxygen-bridged Co-O-Mn bonds. Furthermore, the synthesized 0.5Mn-Co 3 O 4 sample displayed excellent stability and recyclability for more than five consecutive cycles.
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高影响因子
ENVIRONMENT INTERNATIONAL
·
2019
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IF 7.943
Min Sun,Yu Zhang,Hui-Hui Liu,Feng Zhang,Lin-Feng Zhai,Shaobin Wang
Oxygen (O 2 ) in air is an eco-friendly and economical oxidant. However, its activation is an energy-intensive process requiring high operation temperature. Herein, we report the synthesis of nanoscaled Co-CoO on a graphite felt (GF) as an anode material for electrocatalytic wet air oxidation (ECWAO) of water contaminants at room temperature. Such an ECWAO process shows extensive effectiveness in mineralizing a variety of biorefractory organic pollutants. A probe pollutant, bisphenol A (BPA), is rapidly degraded in 180 min with mineralization efficiencies higher than 85% over a wide pH range from 3.0 to 11.0. The Co-CoO/GF electrode exhibits excellent stability in the ECWAO process, without loss of activity and leaching of metal. The ECWAO process is confirmed to be initiated by the electrochemical activation of O 2 through a non-radical pathway. The CoO on the surface of Co nanoparticle is identified as the catalytically active site, at which O 2 molecules are first converted to chemisorbed oxygen species and then electrochemically oxidized to their activated states. The ECWAO process with the Co-CoO/GF electrode presents the merits of high efficiency, low energy input and environmental friendliness, and has a great potential for practical wastewater treatment.
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高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2020
·
IF 7.489
Xuanxuan Han,Tao Jiang,Xing Chen,Demin Jiang,Kun Xie,Yinhua Jiang,Yuqiao Wang
The electrolyte additives of potassium ferricyanide and potassium persulfate can ensure that CoO-supercapacitors achieve a fast charge/slow discharge and long cycling stability. The redox couple of Fe(CN) 6 3− /Fe(CN) 6 4− can induce S 2 O 8 2− to produce the sulfate radical ( S O 4 · - ). Strong oxidizing species, including S 2 O 8 2− , Fe(CN) 6 3− and S O 4 · - , can accelerate oxidation of the CoO electrode surface from Co 2+ to Co 3+ in the charge process. The additives can achieve a good synergistic effect on accelerating CoO oxidation during the charge process. In a three-electrode cell, a CoO electrode with electrolyte additives achieves a fast-charge and slow-discharge time of 939 s and 1699 s at a current density of 1 A g −1 , respectively. The capacitance retention can be maintained at 84.5% after 10,000 cycles at a current density of 5 A g −1 . As a supercapacitor, the device can achieve a fast-charge and slow-discharge time of 156 s and 191 s at a current density of 1 A g −1 , respectively. The capacitance retention can be maintained at 85.5% after 10,000 cycles at a current density of 5 A g −1 .
研究领域:
材料科学
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电化学
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PubMed
高影响因子
Journal of Materials Chemistry A
·
2019
·Vol. 7
·期 17
·10610-10618
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IF 10.733
Zhaoliang Shi,Yuzun Fan,Wei Zhou,Lin Guo
It is critical to fabricate special electron transfer channels and conductive buffer layers in order to obtain efficient electrode materials using interfacial engineering. In this research, ultrathin carbon layers were intercalated into 5 nm thick cobalt oxide (CoO) sheets and used to form porous sandwich-type CoO/nitrogen-doped carbon multi-layers (s-CoO/N–C MLs) with multiple hetero-interfaces. These materials were tested as lithium ion battery anodes, and the reversible capacity of this multi-layered sandwich structure reached 1031.2 mA h g−1 at 0.5 A g−1 after 500 cycles, which was superior to multi-layered nanoplatelets without carbon. The composite also exhibits a high specific capacity of 864.8 mA h g−1 with ∼100% capacity retention at 1 A g−1 and 538.8 mA h g−1 with ∼90% retention at a high current density of 10 A g−1 even after 1200 cycles. The electrochemical measurements reveal that the s-CoO/N–C MLs take up a 71.3% charge contribution from the capacitive-controlled capacity, resulting in excellent rate performance and long-term cycling stability. The much enhanced performance could be ascribed to the interlayer ultrathin carbon of the unique sandwich structure, which could provide electron transfer channels, offer extra lithium storage sites, and serve as buffer layers for volume change during the lithium ion insertion/extraction process. This research may provide insights into the design of hetero-interface advanced electrode materials.
研究领域:
材料科学
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能源存储技术
·
纳米科技
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DOI
高影响因子
MOLECULES
·
2023
·Vol. 28
·期 7
·3040
·
IF 4.6
Lei Zhao,Shichao Du,Rui Gong,Wanqi Jia,Zhimin Chen,Zhiyu Ren
The renewable-energy-driven integration of hydrogen production and biomass conversion into value-added products is desirable for the current global energy transition, but still a challenge. Herein, carbon-coated CoO–Co heterojunction arrays were built on copper foam (CoO–Co@C/CF) by the carbothermal reduction to catalyze the hydrogen evolution reaction (HER) coupled with a 5-hydroxymethylfurfural electrooxidation reaction (HMFEOR). The electronic modulation induced by the CoO–Co heterojunction endows CoO–Co@C/CF with a powerful catalytic ability. CoO–Co@C/CF is energetic for HER, yielding an overpotential of 69 mV at 10 mA·cm−1and Tafel slope of 58 mV·dec−1. Meanwhile, CoO–Co@C/CF delivers an excellent electrochemical activity for the selective conversion from HMF into 2,5-furandicarboxylic acid (FDCA), achieving a conversion of 100%, FDCA yield of 99.4% and faradaic efficiency of 99.4% at the lower oxidation potential, along with an excellent cycling stability. The integrated CoO–Co@C/CF||CoO–Co@C/CF configuration actualizes the H2O–HMF-coupled electrolysis at a satisfactory cell voltage of 1.448 V at 10 mA·cm−2. This work highlights the feasibility of engineering double active sites for the coupled electrolytic system.
研究领域:
能源材料
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电化学
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PubMed
高影响因子
ANALYTICAL BIOCHEMISTRY
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2023
·
IF 2.9
Zhimin Li,Xiong Lu,Guiqiao Liu,Libin Yang,Faming Gao
Core-shell ZIF-8@ZIF-67 was synthesized by growing a cobalt-based ZIF-67 on a ZIF-8 seed particle. Herein, through selective etching of the ZIF-8@ZIF-67 core and subsequent direct carbonization , core-shell hollow ZnO@CoO nitrogen-doped nanoporous carbon (HZnO@CoO-NPC) nanocomposites were prepared. HZnO@CoO–NPCs possessed a high nitrogen content, large surface area, high degree of graphitization and excellent electrical conductivity , all of which were attributed to successfully integrating the unique advantages of ZIF-8 and ZIF-67. HZnO@CoO–NPCs were used to assemble acetylcholinesterase (AChE) biosensors for organophosphorus pesticides (OPs) detection. The low detection limit of 2.74 × 10 −13 M for chlorpyrifos and 7.6 × 10 −15 M for parathion-methyl demonstrated the superior sensing performance. The results showed that the electrochemical biosensor constructed by HZnO@CoO-NPC provided a sensitive and efficient electrochemical strategy for OPs detection.
研究领域:
材料科学
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环境科学
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分析化学
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PubMed
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2026
·Vol. 65
·期 34
·18223-18234
·
IF 3.9
Ji Xianxian,Lin Hui,Faraj Yousef,Xie Ruzhen
Electrochemical nitrate reduction to ammonia (NO 3 RR)
is a sustainable strategy that integrates environmental remediation
with ammonia resource recovery. Current NO 3 RR studies mainly
focus on high nitrate concentrations under idealized electrolyte conditions
to achieve high ammonia yields. Under realistic water conditions,
low NO 3 – concentrations, neutral media,
and competing side reactions often result in sluggish kinetics, low
removal efficiency, and undesirable nitrite accumulation. Herein,
we report a facile strategy for constructing an interface-tunable Cu/Cu 2 O@CoO-P heterojunction
through one-step regulation of the growth of CoO nanoneedles on copper
mesh by tuning the phosphorus concentration. Phosphorus incorporation
effectively modulates the electronic structure of the Co active sites
and tunes the heterojunction interface, thereby optimizing the generation
of adsorbed hydrogen (*H) and suppressing the hydrogen evolution reaction.
This enables a well-matched two-step tandem pathway, where Cu/Cu 2 O facilitates the conversion of NO 3 – to NO 2 – , and the P-modulated CoO sites
rapidly hydrogenate NO 2 – to NH 4 + , thus effectively preventing excessive NO 2 – accumulation. The optimized Cu/Cu 2 O@CoO-P achieves a high Faradaic efficiency
(FE) of 97.11% for NH 4 + - N and an ammonia yield
of 36.09 mg h –1 cm –2 at 10 mA
cm –2 under neutral-pH conditions, along with excellent
stability, retaining 98.45% of its performance after 20 cycles. Notably,
the catalyst demonstrates exceptional practical applicability for
ammonia recovery from real aquaculture tailwater in both batch mode
and continuous-flow mode. This work offers new insights into the design
of tunable heterojunction interfaces to achieve a well-matched and
efficient tandem catalytic process, enabling effective remediation
of low-concentration nitrate contamination and high ammonia recovery
in real wastewater environments.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Shu-Ya Lei,Lin-Bo Liu,Subiao Liu,Wei Sun,Yue Yang,Jing-Li Luo
The recycling of spent LiCoO 2 batteries has attracted numerous attentions in view of their environmental and economic values. However, conventional hydrometallurgy strategies for spent LiCoO 2 recycling still undergo complicated processes that involve multiple steps, resulting in a high-value metal loss and a low value-added product. Herein, a facile method was developed to recycle lithium and repurpose oxygen vacancy-rich cobalt-based catalysts toward oxygen evolution reaction (OER). By roasting LiCoO 2 with ammonium sulfate salt at 975 °C for 120 min, lithium was converted into soluble Li 2 SO 4 and 99.2 % of Li could be preferentially leached by H 2 O, while cobalt was recycled in the form of highly pure cobalt oxide (M−CoO). Importantly, the M−CoO exhibited an excellent OER activity, superior to the spent LiCoO 2 , the prepared Co 3 O 4 , the commercial RuO 2 , and most of the reported cobalt-based catalysts. The results confirmed that the outstanding OER activity of M−CoO was originated from the rich surface oxygen vacancy, which facilitated the surface reconstruction to form a highly active layer of short-range order species during OER. This study showcased a novel approach to achieving a priority lithium recovery, coupled with an advanced route for catalyst regeneration, from spent lithium-ion batteries for energy conversion and storage devices.
研究领域:
材料科学
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环境科学
·
电化学
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高影响因子
ChemSusChem
·
2024
·
IF 7.5
Shenyu Wang,Junjie Zhang,Ying Zhang
Graphical The CoO@Co core-shell catalyst, 7Co-0.2Fe/CeO 2 , efficiently catalyzes the hydrogenation and ring-opening of furfural to 1,5-pentanediol, with a high productivity of 54.76 mmol/g Co /h, representing the top activity level among the reported catalysts. The addition of Fe optimizes the Co 2+ /Co 0 ratio, improves substrate adsorption, and prevents the formation of tetrahydrofurfuryl alcohol, a saturated furan byproduct. In the conversion of furfural using non-noble metal catalysts, preferential cleavage of the C2−O bond followed by hydrogenation of the C=C bond facilitates selective access to valuable 1,5-pentanediol (1,5-PeD). Herein, we developed CeO₂ loaded core-shell CoO@Co nanoparticle catalysts. Adjusting Co loading, Fe doping, and reduction temperature improved reaction efficiency. 7Co-0.2Fe/CeO₂ catalysts reduced at 500 °C demonstrated optimal performance. 1,5-PeD produced at 54.76 mmol/g Co /h, representing the top activity levels among the reported catalysts. H₂-TPR, XRD, HAADF-STEM, FT-IR, XPS, and XANES were employed to investigate the catalyst structure-activity relationship. Co 2+ cleaves furan ring C−O bond, Co⁰ promotes double-bond hydrogenation. The CoO@Co structure favors the desired 1,5-PeD production route. Trace Fe species optimize the Co 2+ /Co⁰ ratio, enhance the substrate adsorption, and inhibit the furan ring saturation. These findings emphasize the importance of fine-tuning catalyst structure and composition for selectivity improvement.
研究领域:
化学工程
·
催化科学
·
可再生资源转化
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高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2021
·
IF 13.273
Kaiqing Dai,Ning Zhang,Lili Zhang,Linxin Yin,Yafei Zhao,Bing Zhang
Designing a non-noble metal-based bifunctional electrocatalyst for simultaneously boosting both hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) is highly desirable, which is decisive for enhancing the efficiency of overall water splitting. Herein, inspired by the appropriate H atoms binding energy of Co metal, favorable OER reaction kinetics of cobalt oxides, and more efficient electron transfer of self-supported structure, Co/CoO anchored on N-doped carbon layer coated on carbon cloth (Co/CoO@NC@CC) is synthesized by a facile self-assembly-carbonization method. Remarkably, the Co/CoO@NC@CC exhibits much increased electrochemical activities toward both OER and HER with low overpotentials of 284 and 152 mV required to deliver the current density of 10 mA cm −2 , respectively, which are superior to most of the reported Co-based and CoO-based catalysts. More importantly, the fabricated Co/CoO@NC@CC‖ Co/CoO@NC@CC electrolyzer only needs a small cell voltage of 1.66 V for driving overall water splitting to achieve the current density of 10 mA cm −2 . Moreover, the Co/CoO@NC@CC behaves superior stability after 25 h of continuous operation. Excellent features including the synergistic effect between Co and CoO, unique hierarchical porous structure, and self-supported construction jointly impart Co/CoO@NC@CC highly elevated bifunctional electrocatalytic activities.
研究领域:
材料科学
·
电化学
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高影响因子
APPLIED SURFACE SCIENCE
·
2019
·
IF 5.155
Shibin Lu,Ying Meng,Haibo Wang,Feifei Wang,Jiangtao Yuan,Hong Chen,Yuehua Dai,Junning Chen
Associated with the unique structure and superior properties of zeolitic imidazolate frameworks (ZIFs) of Co-based metal-organic frameworks (MOFs), we synthesized the MWCNTs@carbonaceous CoO composites of a 3D interconnected network using multi-walled carbon nanotubes (MWCNTs) as decoration through the wet chemical and pyrolysis method. Due to the mutual coordination between proper magnetic loss and strong dielectric loss together with perfect impedance match, the MWCNTs@carbonaceous CoO composites exhibit the maximal reflection loss (RL) value of −50.2 dB with 1.84 mm thickness at 14.3 GHz, absorbing bandwidth (RL ≤ −10 dB) of 13.2 GHz (4.8–18 GHz) with respect to 1.0–4.0 mm thickness range. More importantly, the content of composites added to paraffin matrix is merely 10 wt%. In addition, the synergistic effect between CoO NPs and MWCNTs is also beneficial to the highly efficient electromagnetic (EM) wave absorption of the composites. Therefore, the obtained CoO NPs/MOF-derived composites with lightweight and thin performance can be an attractive candidate of the EM wave absorptive materials.
研究领域:
材料科学
·
电磁学
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高影响因子
危险品化学品经营许可证（带存储）