ACS Catalysis
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2025
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IF 13.1
Zhiwen Liu,Wenqiang Shen,Xiaolong Liang,Jing Liang,Ke Xu,Xu Ge,Jun Lu,Hongsheng Liu,Jingyi Xiao,Liang Wang,Junfeng Gao,Jinxuan Liu
We present a synergistic strategy integrating octahedrally coordinated Mo species as electron buffer and asymmetric site coupling in spinel Co3O4 to achieve acidic oxygen evolution reaction (AOER) activity and durability. The introduced Mo species function as dynamic electron reservoirs, effectively activating and stabilizing tetrahedral Co sites while enabling synergistic electronic coupling between tetrahedral and octahedral sites. This dual-regulation mechanism successfully suppresses cobalt overoxidation and subsequent ion dissolution by maintaining optimal charge redistribution. Furthermore, the asymmetric electronic coupling induced by Mo adjacent to both tetrahedral and octahedral sites facilitates the direct coupling of *O–*O radicals, accelerating oxygen molecule formation. The optimized Mo–Co3O4 NNAs demonstrate remarkable performance metrics: a low overpotential of 310 mV at 10 mA cm–2, exceptional stability over 200 h in 0.5 M H2SO4, and minimal degradation rate (0.09 mV h–1). These achievements position it among the most competitive acid-stable non-precious-metal-based AOER catalysts reported to date. This work establishes fundamental guidelines for designing robust nonprecious electrocatalysts in acidic media and proposes fresh perspectives for implementing oxide path mechanism (OPM) paradigms in advanced AOER.
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JOURNAL OF MOLECULAR CATALYSIS A-CHEMICAL
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2012
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IF 2.947
Fang Hao,Jun Zhong,Ping-Le Liu,Kui-Yi You,He-An Luo
The amorphous SiO 2 –Al 2 O 3 supported Co 3 O 4 catalysts were prepared by impregnation method and characterized by SEM, BET, XRD, XPS, NH 3 -TPD and FT-IR. The influences of the preparation conditions including the loading content of cobalt and the calcination temperature were studied in detail. The results show that the supported Co 3 O 4 /SiO 2 –Al 2 O 3 catalysts possess both Lewis and Brønsted acid sites and the amount of the Brønsted acid sites increases with the increment of the loading content of cobalt. The 20% Co 3 O 4 /SiO 2 –Al 2 O 3 catalyst calcinated at 500 °C shows relative larger surface area and pore diameter, smallest and uniform particle size, well dispersed of Co 3 O 4 . And it has the largest amount of Brønsted acid sites because it occupies the highest content of cobalt and Co 2+ . The relationship between the catalytic performances and the characterization results suggests that the Brønsted acid sites are the selective sites for the cyclohexane nitrosation to ɛ-caprolactam. The 20% Co 3 O 4 /SiO 2 –Al 2 O 3 calcinated at 500 °C gives the best result of conversion of 11.2% and ɛ-caprolactam selectivity of 83.3%, which is the best result since one step synthesis of ɛ-caprolactam from cyclohexane nitrosation was developed.
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GREEN CHEMISTRY
·
2026
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IF 10.6
Lei You,Chen Cheng,Shaoqing Liu,Siwei Kuang,Dongming Cai,Danyun Lei,Ying Zheng,Jianwen Liu
The practical deployment of lithium–sulfur (Li–S) batteries is severely hampered by the polysulfide shuttle effect, significant volume changes during sulfur conversion reactions, and dendrite growth on the Li anode. While modifying diaphragms with polar materials like Co3O4 offers a promising solution, their conventional synthesis relies on costly virgin materials and complex processes, raising economic and environmental concerns. Concurrently, the escalating pile of spent lithium-ion batteries (LIBs) presents a critical waste challenge. Hence, a sustainable “waste-to-wealth” strategy is proposed to address both issues simultaneously through the upcycling of spent LiCoO2 (LCO) batteries into a high-value Co3O4-N-doped reduced graphene oxide (Co3O4-rGO) composite, which is employed as a multifunctional diaphragm modifier. The Co3O4 nanoparticles, derived from the spent cathode, are designed to anchor and convert lithium polysulfides (LiPSs), while the N-doped rGO, regenerated from the discarded anode, provides a conductive network and facilitates Li+ transport. This synergistic effect effectively suppresses the polysulfide shuttle, accelerates reaction kinetics, and promotes uniform lithium deposition. Consequently, Li–S batteries equipped with the Co3O4-rGO-0.5 modified diaphragm exhibit exceptional cycling stability and rate capability, retaining a high capacity of 502.9 mAh g−1 after 600 cycles at 3C with an ultra-low capacity decay rate of 0.0437% per cycle, markedly outperforming batteries with conventional diaphragms. This work establishes a scalable, eco-friendly protocol for repurposing battery waste into advanced materials, paving the way for the development of sustainable energy storage systems.
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JOURNAL OF ELECTROANALYTICAL CHEMISTRY
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2020
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IF 3.807
Mingjun Xiao,Yanshuang Meng,Guixiang Zhao,Huizhen Sun,Xinyou Ke,Guofeng Ren,Fuliang Zhu
Core-shell structured material consisting of Co@Co 3 O 4 core encapsulated in carbon nano-onions (CNOs) shell using 1-hexyl-3-methyl imidazolium dilyanamide ([HMIm]N(CN) 2 ) as carbon source were synthesized by high-temperature carbonization and hydrogen peroxide (H 2 O 2 ) oxidation . In the process of high-temperature carbonization, cobalt ions were in-situ reduced to metallic cobalt, producing core-shell structured Co@CNOs. Subsequently, Co@Co 3 O 4 @CNOs was obtained using H 2 O 2 oxidation, in which parts of the metallic cobalt were in-situ oxidized to Co 3 O 4 , and simultaneously the carbon material was not lost. The structural characterizations indicating that the Co@Co 3 O 4 @CNOs was composed of three crystalline phases, with a higher degree of graphitization and a larger specific surface area. When applied to lithium-ion batteries anode, Co@Co 3 O 4 @CNOs showed superior reversible capacity (865 mAh g −1 after 500 cycles at 0.5C) and rate performance (403 mAh g −1 after 1500 cycles at 10C). Its superior electrochemical performance was attributed to CNOs, nitrogen doping, rich mesopores , and the synergistic effect between Co 3 O 4 and conductive metallic cobalt, uniformly dispersed Co@Co 3 O 4 not only have excellent structural stability but also have improved electrical conductivity and ion transfer.
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Journal of Environmental Chemical Engineering
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2026
·Vol. 14
·期 5
·124526
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IF 7.5
You Zhou,Zhiquan Yang,Siyuan Di,Huarong Yu,Fangshu Qu
Addressing antibiotic water pollution through novel and effective strategies has become a critical endeavor. Increasing studies have shown that peroxymonosulfate (PMS) can be activated to generate singlet oxygen ( 1 O 2 ) by incorporating transition metals into carbon-based materials. Hollow carbon nanocages (HCNs) have proven to be a promising material for advancing energy conversion and battery technologies. However, studies based on HCNs in the field of Fenton-like reactions are scarce. In this study, the Fenton-like activity of HCNs-based catalysts were enhanced via confinement effect coupled with asymmetric Si coordination configuration. The hollow architecture endowed the catalyst with accelerated mass transport and markedly elevated utilization efficiency of active species. Co-HCNs delivered exceptional catalytic performance, accomplishing 99% tetracycline (TC) degradation within 40 min with a 67% mineralization rate, combined with robust anti-interference capacity in real-world water matrices. Density Functional theory (DFT) calculations indicated that the carbon-dense layer boosts the generation of 1 O 2 , in contrast to the cobalt core, which predominantly induced radical-mediated pathways. Integrated experimental analyses further confirmed that the degradation process is dominated by 1 O 2 , with other radicals playing synergistic contributions. Ecotoxicity evaluation verified the environmental compatibility of this process. This work further reveals an "oxidant-derived, dual-channel-driven 1 O 2 supply mechanism." This mechanism enhances the instantaneous supply capacity of 1 O 2 in the system and provides a clearer catalytic rationale for the selective oxidation of pollutants and stable purification in complex water matrices.
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APPLIED SURFACE SCIENCE
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2026
·
IF 6.6
Ao-tian Gu,Xiao-jun Dai,Pei Liu,Jian Chen,Lei-Lei Gu,Peng Wang,Chun-hui Gong,Yi Yang
MOF-derived CuO/Co 3 O 4 heterojunctions were constructed for efficient PMS activation. • The interfacial built-in electric field induces directional electron transfer from Co to Cu. • High-valent metal species and non-radical pathways dominate BPA degradation. • Enhanced PMS adsorption promotes O − O bond cleavage and a non-radical pathway. Efficient removal of phenolic endocrine disruptors, such as bisphenol A (BPA), remains a significant challenge in complex aquatic environments. In this study, a CuO/Co heterojunction catalyst (CuCo-NC X ) was developed by anchoring Co 3 O 4 nanoparticles onto MOF derived CuO/carbon composites for the high-performance activation of peroxymonosulfate (PMS). The CuCo-NC/PMS system exhibited superior catalytic activity, achieving a 97.8% removal of BPA within 40 min, with a corresponding apparent rate constant of 0.1111 min −1 . Furthermore, it demonstrated exceptional anti-interference capability and selectivity in complex aqueous matrices containing various co-existing anions and natural organic matter. Density functional theory (DFT) calculations and systematic characterization revealed that a built-in electric field (BIEF) formed at the CuO/Co 3 O 4 interface strongly drives directional electron transfer from Co sites to Cu sites. During the catalytic process, the electron-rich Cu acts as an electron reservoir, significantly promoting the Co redox cycle through an electron feedback effect, which induces the generation of high-valent metal species (HVMs) and optimizes the PMS activation pathway. This study not only develops a high-performance catalytic platform for eliminating endocrine disruptors but also provides new insights into modulating heterogeneous catalytic pathways via interfacial BIEF. Download: Download high-res image (198KB) Download: Download full-size image
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Materials Today Bio
·
2026
·
IF 11
Yinxi Li,Qinxuan Zhou,Yuxuan She,Bin Lu,Mengting Wu,Tianhao Chen,Pengcheng Ye,Li Yu,Wenzhao Liu,Hui Deng,Xiaowen Hu
Inflammatory bowel disease (IBD) is a chronic gastrointestinal disorder characterized by a self-perpetuating pathological loop, where excessive reactive oxygen species (ROS) induce mucosal inflammation, which in turn drives further ROS production. This oxidative-inflammatory cycle leads to intestinal epithelial barrier disruption and gut microbiota dysbiosis. Current immunosuppressive therapies primarily target downstream inflammation, while fail to address the foundational oxidative stress and achieve complete mucosal healing. To bridge this gap, we developed an orally deliverable nanozyme platform by anchoring cobalt oxide (Co 3 O 4 ) nanoparticles onto montmorillonite nanosheets (Co 3 O 4 @MMT). This design leverages the Co 2+ /Co 3+ redox cycling within Co 3 O 4 for efficient multi-enzymatic ROS scavenging. Furthermore, transcriptomic analysis and literature evidence suggest that the released Co 2+ ions can activate the HIF-1α pathway—a key regulator of epithelial repair. The MMT component protects the nanozyme from gastrointestinal degradation and facilitates its electrostatic accumulation at inflamed colonic sites. In murine colitis models, oral Co 3 O 4 @MMT treatment effectively alleviated disease severity, suppressed inflammation, restored barrier integrity, and rebalanced gut microbiota. This work presents an integrated oral strategy that concurrently targets oxidative stress, inflammation, and barrier restoration, offering a comprehensive therapeutic approach for IBD.
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PubMed
高影响因子
Molecular Catalysis
·
2026
·
IF 4.3
Haonan Ying,Zheng Xiong,Xinwei Yang,Min Ding,Li Wang,Yun Guo,Yanglong Guo,Wangcheng Zhan,Jihang Yu,Aiyong Wang
Co 3 O 4 is a promising catalyst for propane combustion but is limited by poor water resistance and insufficient high-temperature stability. Noble metal loading is widely employed to enhance its performance, however, the metal-specific effects remain poorly understood. In this work, Co 3 O 4 -supported Pt, Pd, and Ru catalysts were systematically investigated for propane oxidation. It was found that all noble metals decreased the surface Co 2+ content and oxygen vacancies, leading to modified redox behavior and propane activation ability. Among them, Ru incorporation enhanced the catalytic activity (T 90 = 266 °C) of Co 3 O 4 (T 90 = 286 °C) and significantly improved its water resistance and thermal stability. These improvements are mainly attributed to the abundant partially oxidized RuO x species, which provide additional active sites and facilitate propane adsorption and activation. In contrast, Pt and Pd modification inhibited propane oxidation due to the intrinsically low activity of highly oxidized Pt species and PdO, as well as the coverage of Co 3 O 4 active sites caused by highly dispersed Pt and particulate PdO. The findings offer mechanistic insights for the rational design of efficient catalysts for propane combustion and VOCs abatement.
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CATALYSIS LETTERS
·
2026
·Vol. 156
·期 4
·108
·
IF 2.5
Xu Tingting,Yang Xiaofeng,Chen Jin,Ma Yuzhao,Li Yanjun
Tetracycline persists extensively in aquatic environments due to its refractory nature, posing a significant threat to ecosystem integrity and human health. However, the practical application of pure BaTiO 3 is limited by low carrier mobility and insufficient active sites. Herein, we synthesized rod-shaped Ba 1−x Sr x TiO 3 /Co 3 O 4 (x = 0.1–0.5) heterojunction catalysts to investigate their degradation performance of tetracycline (TC). Specifically, electron modulation was achieved through Sr doping-induced lattice distortion and oxygen vacancies, which optimized the surface charge state and generated defect dipoles to enhance local polarization. Moreover, the anisotropic rod-like morphology enhanced the flexoelectric effect under ultrasonic stimulation to promote the separation of charge carriers. Furthermore, the construction of low-resistance electronic channels at the Ba 1−x Sr x TiO 3 /Co 3 O 4 heterojunction interface accelerates the Co 2+ /Co 3+ redox cycle. Consequently, TC is effectively degraded with an efficiency of 99.39% by the BST-4/Co 3 O 4 /PMS systems. Furthermore, O 2 ·− was confirmed as the primary reactive oxygen species by free radical capture experiments. This study adopts a strategy that integrates lattice distortion, morphological design and heterostructure construction to effectively enhance the flexoelectric catalytic performance of the material. The approach provides a novel solution for the removal of antibiotics in wastewater. Graphical
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WATER RESEARCH
·
2026
·
IF 12.8
Shao YiFan,Ruirui Liu,Yongquan Zhou,Jianming Pan
Selective boron capture from hypersaline brines remains challenging because existing adsorbents generally suffer from three unresolved limitations: low metal-site activity toward neutral boric acid, poor anti-interference performance in highly saline matrices, and an unclear molecular-level activation mechanism. Here, we report an interfacial N-vacancy-engineered Co 3 O 4 @g-C 3 N 4 heterojunction (CoCN) for selective boron recovery, constructed by coupling ZIF-67-derived porous Co 3 O 4 with nitrogen-vacancy-rich ultrathin g-C 3 N 4 nanosheets. Batch adsorption experiments, real-brine tests, and density functional theory (DFT) calculations collectively show that interfacial N vacancies induce local charge redistribution and render adjacent Co sites more electron-deficient, thereby enhancing their Lewis acidity toward boric acid. This defect-regulated interfacial activation changes boric acid adsorption from thermodynamically unfavorable on the pristine interface (ΔG = +1.41 eV) to favorable on the defective interface (ΔG = −4.28 eV), promoting Co-O-B bond formation. As a result, the optimized CoCN-5 delivers a boron adsorption capacity of 128.5 mg g −1 at 25 °C within 120 min, markedly higher than that of pristine Co 3 O 4 , and achieves boron uptakes of 81 and 79 mg g −1 in real LaGuoCuo and ChaErHan salt-lake brines, respectively, while maintaining high selectivity against major coexisting ions.
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International Journal of Electrochemical Science
·
2023
·Vol. 12
·期 12
·11987-11996
·
IF 1.5
Ju Rong,Meng Kun,Xiaohua Yu,Zhang Yannan
In order to increase the cycling performance and reversible capacity of Co 3 O 4 electrode materials, TiO 2 /Co 3 O 4 anode materials were prepared by a two-step hydrothermal method. The phase composition, structure and morphology of the TiO 2 /Co 3 O 4 anode materials were characterized by X-ray diffraction, scanning electron microscopy and transmission electron microscopy. The electrode performance of the materials was tested by a battery discharge and charge tester and an electrochemical workstation. The results shows that the TiO 2 /Co 3 O 4 nanostructured materials consist of a new type of nest-like nanostructure, formed by an external mechanical force. A single nest-like TiO 2 /Co 3 O 4 nanostructure is composed of the monoclinic TiO 2 -B and cubic Co 3 O 4 phases. The nanostructured materials have excellent electrochemical performance, with a capacity of 650 mAh/g and a current density of 33.5 mA/g after 100 cycles.
研究领域:
材料科学
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电化学
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纳米技术
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储能
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高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2026
·
IF 19.7
Xuefei Li,Cheng Cheng,Lixia Yang,Zhenglin Chen,Shuqu Zhang,Jianping Zou
Bi 3+ doping enhances the singlet oxygen ( 1 O 2 ) lifetime. • Oxygen vacancy-rich Bi-Co 3 O 4 catalyst. • Under irradiation, Bi-Co 3 O 4 can efficiently degrade toluene and sterilize bacteria. • Bi-Co 3 O 4 exhibits efficient antibacterial activity, providing new insights for practical indoor air purification Developing efficient materials with excellent adsorption properties and photoactivity is pivotal for photocatalytic abatement of VOCs and bacteria in the air. Herein, Bi 3+ -doped Co 3 O 4 (Bi-Co 3 O 4 ) photocatalysts were successfully synthesized via a one-step hydrothermal-calcination method. Incorporation of Bi 3+ ions induces lattice distortion in Co 3 O 4 , generating oxygen vacancies (OVs), which subsequently modulates the electronic structure of Co 3 O 4 and produces singlet oxygen species ( 1 O 2 ) with a lifetime of 30 min. The Bi-Co 3 O 4 , with a geometric area of 24 cm 2 , achieves complete degradation (100%) of 50 ppm toluene within 30 min and a high mineralization rate of 93.4%. It retains outstanding photocatalytic activity even after multiple usage cycles. Notably, high-reactivity oxygen species at the Bi-Co 3 O 4 interface can effectively eliminate Escherichia coli ( E. coli ) and Staphylococcus aureus ( S. aureus ). This work offers theoretical insights for the design of stable and efficient photocatalysts aimed at improving indoor air quality. Download: Download high-res image (212KB) Download: Download full-size image
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