CHEMICAL ENGINEERING JOURNAL
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2022
·
IF 16.744
Dan Xu,Jianfeng Li,Boyang Li,Huacheng Zhao,Hanghang Zhu,Jinfang Kou,Fengwei Zhang,Zhengping Dong,Jiantai Ma
The sustainable catalytic transformation of alcohols to high value-added fine chemicals is a significant and challenging research topic. Herein, a set of nitrogen-doped carbon encapsulated Co-based catalysts (Co-Co 3 O 4 @NC-T) were prepared by using low-cost dicyandiamide, glyoxal and cobalt nitrate as precursors. The obtained catalysts were utilized for the selective oxidation of alcohols to high value-added esters and carboxylic acids with air as the oxygen source and displayed wide applicability for the oxidation of both aromatic and aliphatic alcohols. Based on the controlled experiments, the protective effect of N-doped carbon structure and the synergistic effect between Co core and Co 3 O 4 species guaranteed the high reaction conversion and selectivity. Benefitting from heterogeneity and magnetism of the catalyst, it can be easily recycled and reused for long-term stability. Reasonable mechanisms of selective oxidation reaction were proposed through EPR analysis and controlled experiments. The present work provides a facile strategy for potential large-scale preparation of heterogeneous catalyst for sustainable and green catalytic transformations.
研究领域:
催化化学
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材料科学
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绿色化学
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产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2021
·
IF 13.273
Cong Geng,Peng Wei,Huamei Chen,Haichao Liu,Shenshen Zheng,Haobin Wang,Yahong Xie
Carbon-based perovskite solar cells (C-PSCs) facilitate modularization and commercialization due to their excellent thermal stability and low cost. However, C-PSCs show the poor performance that charge carrier extraction by the carbon electrode alone is not as efficient as in the case of conventional hole transport materials (HTMs) based PSCs. In this work, an inorganic hole buffer layer of nitrogen-doped carbon/Co 3 O 4 (Co 3 O 4 @NC) nanoparticles derived from MOFs is introduced to adjust energy alignment and passivate perovskite (PSK) grain boundaries (GBs). Moreover, a simple processing method on the Co 3 O 4 @NC nanoparticles manipulated by controllable ultraviolet/ozone (UVO) treatment is employed, to further improve the interfacial performance of MAPbI 3 /Co 3 O 4 @NC and reduce the hysteresis. Through interface engineering, it is found that Co 3 O 4 @NC inorganic hole buffer layer effectively promotes photo‐generated charge separation and extraction, and suppresses charge recombination at the MAPbI 3 /Carbon electrode (CE) interface, resulting in improved photovoltaic performance. Consequently, the optimal C-PSCs without encapsulation achieved a maximum PCE of 14.63%, which is 22.3% more efficient than the pristine device (11.96%), and exhibited outstanding long-term stability.
研究领域:
材料科学
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能源技术
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光电转换
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DOI
高影响因子
MICROCHEMICAL JOURNAL
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2025
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IF 5.1
Haoran Yang,Xu Zhao,Ke Shang,Yu Zhang,Mian Li,Tingting Liu
Non-noble-metal nanomaterials, characterizing by their low cost, large surface area, abundant active sites, and superior conductivity, play a pivotal role in the development of advanced electrochemical sensors. In this study, cobalt oxalates recovered from waste lithium-ion batteries are employed as cobalt sources to successfully synthesize three-dimensional (3D) porous Co-Co 3 O 4 @NC-CNT microspheres via a straightforward hydrothermal method. The sensors based on Co-Co 3 O 4 @NC-CNT microspheres enable rapid, sensitive, and precise detection of hydrogen peroxide (H 2 O 2 ) and glucose. Under optimum conditions, when used for glucose detection, the Co-Co 3 O 4 @NC-CNT microspheres exhibit a rapid response time of 2.9 s, a low limit of detection (LOD = 0.066 μM), a high sensitivity of 104.73 μA cm −2 mM −1 , and a wide linear range of 0.01 to 16.0 mM. For H 2 O 2 detection, the 3D porous Co-Co 3 O 4 @NC-CNT microspheres demonstrate an excellent sensitivity of 238.74 μA cm −2 mM −1 , a low LOD of 0.128 μM, and a wide linear range of 0.04 to 16.0 mM. In addition, as non-enzymatic sensors for both glucose and H 2 O 2 , the 3D porous Co-Co 3 O 4 @NC-CNT microspheres showcase exceptional stability, repeatability, and remarkable resistance to interference from organic and inorganic molecules. Notably, the electrochemical sensors based on Co-Co 3 O 4 @NC-CNT microspheres demonstrate excellent accuracy in the quantitative determination of H 2 O 2 and glucose concentrations in real samples. This study not only establishes a promising industrial chain for the recycling of cobalt from spent devices to synthesize 3D porous and spherical Co-Co 3 O 4 @NC-CNT catalysts, but also paves the way for the sensitive and rapid detection of H 2 O 2 and glucose concentrations in real samples, along with other biosensing applications.
研究领域:
材料科学
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电化学
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环境科学
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纳米技术
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分析化学
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产品关联
DOI
高影响因子
ACS Catalysis
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2025
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IF 13.1
Ruiqi Fang,Jie Kang,Fengliang Wang,Xin Zhao,Yingwei Li
The production of valerate esters, a class of transportation biofuels (additives), usually undergoes alternate hydrogenation and acid-catalysis dehydration processes that suffer from inevitable coke deposition and undesirable side reactions. We report a one-pot esterification–hydrogenolysis reaction pathway for valeric biofuels synthesis from biomass-derived 2-furoic acid, which was proceeded over the elaborate CoPtX@Co3O4-NC (X = 0.01, 0.02, 0.05, and 0.1) catalysts. The catalysts were constructed through a MOF-engaged etching-pyrolysis-replacement strategy to obtain mesoporous pocket cube nanoboxes-in-nanobox morphology and uniform CoPtX@Co3O4 core–shell nanoparticles with Pt moieties in tunable content and size (from single-atom scale to 2.4 nm). The obtained acid-free CoPtX@Co3O4-NC catalyst achieved an average 92.2% yield of ethyl valerate at a complete conversion of 2-furoic acid, and the reaction ran steadily in a microchannel continuous flow reactor for at least 200 h, which also inhibited the byproduct generation and coke deposition. A mechanistic study suggested that 2-furoic acid was preferably adsorbed on the oxyphilic Co3O4 shell for esterification initially; then the generated esters underwent sequential and exclusive hydrogenolysis steps over the CoPt core to yield valerate esters. The high industrial application prospect of this reaction pathway was additionally highlighted by producing 12 kinds of valeric biofuels from 2-furoic acid and the corresponding C1 ∼ C7 primary, secondary, and tertiary alcohols.
研究领域:
化学工程
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催化材料科学
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产品关联
DOI
高影响因子
Carbon Neutralization
·
2025
·Vol. 4
·期 4
·e70030
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IF 12
Hailong Zhong,Chuanwang Zeng,Jiajun Lai,Guiyong Liu,luya Jin,Chao Liu,Xiaopeng Qi
Engineering vacancy defects is a critical approach to modulating the properties of catalytic materials. However, the development of highly efficient vacancy defect catalysts and the investigation of their roles and effects remain challenging. In this study, nitrogen-doped carbon-coated Co 3 O 4 porous nanomaterials were synthesized using ZIF-67 as a sacrificial template. Subsequently, through vacuum heat treatment, nitrogen-doped carbon-coated Co 3 O 4 porous nanomaterials with an appropriate amount of oxygen vacancies were finally obtained. This material exhibits excellent oxygen evolution reaction (OER) catalytic activity. At a current density of 10 mA cm −2 , the overpotential is only 293 mV, and it has good cyclic stability. The existence of oxygen vacancies has been confirmed by various characterization methods. Moreover, density functional theory (DFT) calculations show that oxygen vacancies can enhance the electrical conductivity of the material, optimize the binding energy of the intermediates in the OER, and significantly improve the catalytic activity. In this study, a method of designing high-performance OER electrocatalytic materials by regulating the oxygen vacancies in the nitrogen-doped carbon-coated Co 3 O 4 system is proposed, which opens up a new way for the development of efficient transition-metal-based electrocatalysts for water splitting. Summary Using ZIF-67 as a template, obtained uniformly dispersed nitrogen-doped carbon-coated cobalt tetraoxide has relatively abundant porosity. The introduction of oxygen vacancy defects significantly improves the electrical conductivity and specific surface area of the material in favor of electrocatalysis. DFT calculation shows that the introduction of oxygen vacancy can significantly improve the conductivity of the material, Co 3 O 4 system is conducive to the reaction of oxygen-containing intermediates, reduces the binding energy required in the reaction process, and improves the electrocatalytic activity of the material. The prepared Co 3 O 4 /NC-Ov-1 showed excellent OER catalytic performance (overpotential of 293 mV at 10 mA cm −2 ).
研究领域:
材料科学
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电化学
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催化
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纳米技术
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理论化学
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产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
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2020
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IF 6.182
Huanhuan Li,Mingyang Tan,Can Huang,Weiping Luo,Shuang-Feng Yin,Weijun Yang
Functional nanosheets have attracted great attention due to their potential applications in catalysis chemistry and material science. Herein, Co 3 O 4 nanoparticles interconnecting with nitrogen-doped carbon architectures (denoted as Co 3 O 4 /NC) was developed on nickel foam surface by a two-step solvothermal process and followed by calcination. A metal organic framework (MOF) of laminar CoMOF-NH 2 was synthesized firstly by in-situ transformation of Co 2 (OH) 3 Cl array. Then, porous Co 3 O 4 /NC nanosheets were obtained by controlled heat treatment of CoMOF-NH 2 . The Co 3 O 4 /NC supported by nickel foam can be directly used as self-supported electrodes for electrocatalysis without any binders. As-synthesized Co 3 O 4 /NC acts as effective catalysis for oxygen evolution reaction (OER). Interestingly, the optimized electrochemical efficiency for OER was achieved by Co 3 O 4 /NC nanosheet with overpotentials of 235 mV and 264 mV offering current densities of 10 mA/cm 2 and 100 mA/cm 2 , respectively. It also has a relatively low Tafel slope, which indicates the fast electron transfer kinetics of the catalyst. So Co 3 O 4 /NC nanosheet has great potential in replacing precious metal electrocatalysts in OER application.
研究领域:
材料科学
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催化化学
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DOI
高影响因子
MICROCHEMICAL JOURNAL
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2026
·
IF 5.2
Baoli Wang,Yuhang Zhang,Yijun Zhang,Yan Deng,Feng Yang
Uniform Co 3 O 4 nanoparticles with abundant active sites loaded on the N-doped graphite carbon was prepared. • Co 3 O 4 /NC based electrochemical sensor was fabricated to detect chloramphenicol in environmental samples. • The proposed sensor presents wider linear ranges and lower detection limit. Chloramphenicol (CAP), a typical broad-spectrum antibiotic, poses considerable threats to human health due to its residues transferring through the food chain. Thus, the development of fast and highly sensitive detection technologies for CAP is of great practical importance. Herein, a Co 3 O 4 @NC nanocomposite was prepared via a controllable thermal decomposition-oxidation approach. This composite was further employed as an electrode modification material to construct a novel electrochemical platform, which was designed for the quantitative detection of CAP. Characterizations revealed that Co 3 O 4 nanoparticles were wrapped in the carbon sheet in the prepared Co 3 O 4 @NC nanocomposite with a specific surface area of 285.5 m 2 /g, along with affluent oxygen vacancy active sites. Electrochemical performance measurements indicated that Co₃O₄@NC exhibits excellent electrocatalytic reduction activity toward CAP. Under optimized experimental conditions, differential pulse voltammetry (DPV) was employed to detect CAP, and the sensor emerged a linear detection range of 0.1–500 μmol/L with a low detection limit of 12.4 nmol/L, outperforming most electrochemical sensors for CAP reported in previous papers. Additionally, it owned good selectivity, as the relative standard deviation (RSD) of the CAP detection signal was less than 5% even as the other familiar interfering species were concomitant. It also demonstrated remarkable stability, repeatability, and anti-interference ability. When applied to the actual determination of CAP residues in environmental samples, the sensor yielded recovery rates of 97.02%–104.23% for marine sediment samples and 99.77%–104.06% for seawater samples, with all RSD values below 5.1%. This study realizes the structural and performance regulation of Co₃O₄ materials through a simple and feasible strategy, providing a new sensing platform for the rapid detection of trace CAP and offering novel insights into the application of metal oxides in electrochemical sensing fields. Download: Download high-res image (126KB) Download: Download full-size image
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DOI
高影响因子
ACS Applied Energy Materials
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2025
·
IF 5.5
Kaixin Zhang,Zimu Li,Yeqiang Wang,Dajun Cui,Jiangxin Wang,Kuanhong Mei,Minmin Liu,Haoyang Dong,Yiman Zhang,Juan Zhang,Weiguo Xu,Shuo Li
The employment of Co-based cocatalysts in BiVO4 (BVO) photoanodes is still suffering from inefficient hole transfer to active sites and sluggish charge kinetic processes. To address this issue, we designed a hierarchical dual-shell Co@Co3O4@NC (Co-DS) cocatalyst synthesized via the controlled pyrolysis of CoCo Prussian blue analogs under micro-oxygen conditions. The designed hierarchical structure consists of a graphitic carbon shell that encases the Co3O4 interlayer, which is abundant in OER-active sites, coupled with a metallic Co core that enhances hole accumulation and charge transfer across interfaces. The optimized Mo-BVO/Co-DS photoanode achieves a photocurrent density of 4.95 mA/cm2 at 1.23 VRHE, representing a 129% enhancement over pristine BVO (2.16 mA/cm2). This work provides fundamental insights into the design principles of metal-oxide-based cocatalysts for overcoming efficiency limitations in photochemical water oxidation.
研究领域:
材料科学
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纳米技术
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电化学
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可再生能源
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光化学
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产品关联
DOI
高影响因子
Journal of Materials Chemistry A
·
2022
·Vol. 10
·期 36
·18907-18915
·
IF 14.511
Xuefan Zheng,Yuqi Wu,Cheng Li,Jinxue Peng,Wu Yang,Zhongwei Lv,Haoyue Zhong,Zhengliang Gong,Yong Yang
All-solid-state lithium–sulfur batteries (ASSLSBs) are promising candidates for the development of next-generation batteries with high energy density and improved safety. Nevertheless, the sluggish reaction kinetics of the S and Li2S cathode and the low active material content hinder the further development of ASSLSBs. Herein, a Co3O4@nitrogen-doped carbon (Co3O4@NC) nanocomposite is used as an electronically conductive additive to promote the conversion kinetics of S and Li2S in the solid sulfur cathode. With a high sulfur content of 50 wt% and sulfur loading of 4 mg cm−2, ASSLSBs with the S–Co3O4@NC–Li7P3S11 (S–CoNC–LPS) composite cathode exhibit a high specific capacity of 1313 mA h g−1 at 0.2 mA cm−2, as well as a reversible capacity of 1167 mA h g−1 after 100 charge/discharge cycles. Furthermore, the S–CoNC–LPS cathode also demonstrates a high areal capacity of 16.12 mA h cm−2, corresponding to a reversible capacity of 1343 mA h g−1, and good cycling stability even with an ultra-high sulfur loading of 12 mg cm−2. Such a superior electrochemical performance can be attributed to the fact that Co3O4@NC lowers the reaction energy barrier and promotes the interconversion of S and Li2S.
研究领域:
材料科学
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电化学
✓ 已验证
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2023
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IF 6.7
Rongyao Ma,Guolang Zhou,Mingrui Gu,Xin Tang,Wenhao Ding,Yu Guan,Yexin Jiang,Jingzhou Yin,Lili Zhang,Edison Huixiang Ang
In this study, we synthesized Co-based coordination polymer-derived nitrogen-doped carbon-coated Co 3 O 4 spheres (Co 3 O 4 @NC) and yolk-shell Co 3 O 4 spheres (Co 3 O 4 -YS) under various atmospheric conditions to explore their efficacy in activating peroxymonosulfate (PMS) for tetracycline (TC) degradation. The Co 3 O 4 @NC, featuring a significantly higher specific surface area (268.4 m 2 /g), exhibited remarkable performance by achieving 90% TC removal in 5 minutes using 0.2 g/L PMS and 0.1 g/L of Co 3 O 4 @NC. This reaction rate was 9.2 times higher than that observed with Co 3 O 4 -YS. Furthermore, the Co 3 O 4 @NC/PMS system demonstrated exceptional stability across a wide pH range, in complex water compositions, and the presence of common coexisting ions. The unique coated structures effectively minimized the leaching of Co ions (below 0.447 mg/L). Additionally, the strong magnetism of Co 3 O 4 @NC allows for easy separation under a magnetic field. Mechanistic investigations identified 1 O 2 , ∙OH, O 2 ∙ - , and SO 4 ∙ - as the principal reactive species. The study also explored potential degradation pathways and toxicity.
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产品关联
DOI
高影响因子
Journal of Materials Research and Technology-JMR&T
·
2022
·
IF 6.267
Ruixiang Wang,Yanyang Wang,Yanhua Lu,Jiangfeng Zheng,Caini Zhong,Jiaming Liu,Jianjun Liu,Shubiao Xia
Constructing advanced nanostructures and combining various active materials are effective strategies to obtain high-performance anode materials for lithium-ion batteries (LIBs). Herein, we report a surface-coordinated polymerization method to synthesize ZIF-67 nanoparticles with a reuleaux tetrahedron morphology, and combine the electrostatic adsorption method and heat treatment, nitrogen-doped hollow porous Co 3 O 4 (HP-Co 3 O 4 /NC) nanoparticles were anchored on reduced graphene oxide (rGO) to obtain HP-Co 3 O 4 /NC@rGO composites. This deliberate structural design can significantly improve the electrochemical performance of lithium (Li) storage. When applied as an anode material in LIBs, HP-Co 3 O 4 /NC@rGO nanocomposite renders a reversible capacity of 809 mAh g −1 after 200 charge/discharge cycles at a current density of 1000 mA g −1 . The excellent electrochemical performance is mainly attributed to the synergistic effect of the hollow nanostructure and graphene network. A hollow nanostructure can provide abundant active sites and enhance structural stability. As a conductive network, graphene tightly wraps Co 3 O 4 , which can not only increase the electronic and ionic transport but also alleviates the volumetric changes of Co 3 O 4 during the charge/discharge process, thereby improving the rate performance and cyclic stability.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）