APPLIED CATALYSIS B-ENVIRONMENTAL
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2026
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IF 19.7
Wenlu Zhang,Yaning Fu,Zhen Feng,Mengyao Huang,Youcai Lu,Qingchao Liu
Mn doping creates symmetry-broken Co δ+ -O-Ru δ− heterointerfaces. • Polarized Ru and Co sites enable catalytic shunting of ORR and OER. • Reversible metal-oxygen bond adaptation accelerates Li 2 O 2 conversion. • The catalyst delivers an ultralow discharge-charge overpotential of 0.37 V. • Li-O 2 cells reach 34,738 mAh g −1 and cycle stably for 208 cycles. Aprotic Li-O 2 batteries require efficient bifunctional oxygen electrocatalysis, yet ORR and OER impose conflicting demands on oxygen-intermediate adsorption and product desorption. Herein, we construct a symmetry-broken Mn-doped Co 3 O 4 /RuO 2 heterointerface on carbon cloth to couple catalytic shunting with self-adaptive interfacial bonding. Mn incorporation reinforces Co-O-Ru coupling and generates asymmetric Co δ⁺ -O-Ru δ⁻ units, as verified by XPS, XAS, and theoretical calculations. The resulting interfacial polarization spatially divides the oxygen-redox pathway: electron-enriched Ru sites preferentially promote O₂ adsorption/activation for ORR, whereas electron-deficient Co sites facilitate Li₂O₂ decomposition/desorption for OER. Meanwhile, in situ Raman spectroscopy and theoretical bond-length analysis reveal reversible metal-oxygen bond elongation/contraction during discharge/charge, enabling temporal adaptation of interfacial bonding to evolving intermediates. This spatial shunting and temporal self-adaptation synergistically mitigate the adsorption-desorption conflict, improve Li 2 O 2 reversibility, and maintain efficient charge-transfer pathways. Consequently, the Mn-Co 3 O 4 /RuO 2 cathode achieves a low overpotential of 0.37 V, a high discharge capacity of 34,781 mAh g −1 , and stable cycling for 208 cycles. This study provides a shunt-adaptive heterointerface strategy for multistep oxygen electrocatalysis. Download: Download high-res image (275KB) Download: Download full-size image
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高影响因子
Surfaces and Interfaces
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2025
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IF 6.3
Chaoyang Wang,Xin Ma,Yun Zhao,Miaomiao Jin,Pingyi Zhang,Haifang Mao,Jibo Liu
Aromatic aldehydes and epoxides, synthesized through catalytic oxidation of olefins, are important intermediates in pharmaceuticals, fragrances, and resins. However, efficient and selective oxidation of olefins remains a significant challenge. In this work, a Co 3 O 4 nanoparticle-loaded graphitic carbon nitride (C 3 N 4 ) catalyst was developed for the selective oxidation of styrene using tert-butyl hydroperoxide (TBHP) as the oxidant. The Co-C 3 N 4 -15 catalyst achieved a styrene conversion of 94.6% and product selectivity of 96.4%. DFT calculations indicated that the activation energy for styrene oxide formation was significantly lower compared to benzaldehyde, which explained the higher selectivity for styrene oxide. This work demonstrates the potential of combining non-precious metal catalysts and green oxidants for sustainable chemical processes, offering a pathway to reduce reliance on high-energy industrial methods.
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高影响因子
CERAMICS INTERNATIONAL
·
2026
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IF 5.6
Yanhu Li,Qinhe Pan,Kaixiang Shi,Quanbing Liu,Yanan Guo,Qingji Wang
Metal-organic-framework (MOF)-derived oxide is a promising gas-sensing material candidate because of its high surface area, porosity and structural diversity. Utilizing Aerosol-assisted chemical vapor deposition (AACVD), the fabrication of MOF-derived films performs characteristic morphology and controlled size, which greatly improve the gas-sensing performance. Herein, the heterojunction interface between SnO 2 nanorods and MOF-derived Co 3 O 4 nanoparticles was prepared by two step AACVD. Firstly, SnO 2 nanorods were directly grown on flat electrode. Subsequently, size-controlled MOF-derived Co 3 O 4 nanoparticles were coated on SnO 2 nanorods. The hydrogen sensors were developed based on the above sensing materials with different deposition time ( 0, 30, 40 and 50 min) to demonstrate gas-sensing performance. The Co 3 O 4 /SnO 2 -40 sensor exhibits a response value of 305 % to 100 ppm of H 2 at 310°C, which is 4.4 times of the SnO 2 sensor. Moreover, the Co 3 O 4 /SnO 2 -40 sensor retains a measurable response of 4 % even at an extremely low hydrogen concentration of 200 ppb. The superior sensing performance of this sensor can be attributed to the large surface area and the p-n heterojunction interface. Consequently, the construction of heterojunction via AACVD offers an approach for fabricating high performance hydrogen sensors.
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Materials for Renewable and Sustainable Energy
·
2019
·Vol. 8
·期 3
·15
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IF 0
Xu Xi,Wang Chao,Fronzi Marco,Liu Xuehua,Bi Lei,Zhao X. S.
Co 3 O 4 nanocubes with exposed (001) planes were prepared and employed for use as first-generation Sr-doped LaMnO 3 (LSM) cathodes in solid oxide fuel cells to improve the cell performance. Theoretical simulations suggest that the Co 3 O 4 (001) plane has the smallest oxygen adsorption and oxygen dissociation energies compared with other planes, thus favouring cathode reactions in solid oxide fuel cells (SOFCs). Experimental studies consistently demonstrate that a cell using an LSM cathode made with Co 3 O 4 nanocubes with selective (001) surfaces exhibits a peak power density of 500 mW cm −2 at 600 °C, while the power output for a cell using unselective (commercial) Co 3 O 4 nanoparticles is only 179 mW cm −2 at the same temperature. The electrochemical study indicates that the use of Co 3 O 4 nanoparticles with exposed (001) surfaces obviously accelerates the cathode reactions and thus decreases the polarisation resistance, which is the key to improving fuel cell performance. This study demonstrates the feasibility of using the crystal planes of metal oxides to improve the fuel cell performance and provides a new way to design SOFC cathodes.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2023
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IF 9.9
Jing Jiang,Wei Wei,Zhen Ren,Yang Luo,Xinzhi Wang,Ying Xu,Mingming Chang,Lunhong Ai
Developing efficient catalysts for the dehydrogenation of ammonia borane (AB) is important for the safe storage and controlled release of hydrogen, but it is a challenging task. In this study, we designed a robust Ru-Co 3 O 4 catalyst using the Mott-Schottky effect to induce favorable charge rearrangement. The self-created electron-rich Co 3 O 4 and electron-deficient Ru sites at heterointerfaces are indispensable for the activation of the B-H bond in NH 3 BH 3 and the O H bond in H 2 O, respectively. The synergistic electronic interaction between the electron-rich Co 3 O 4 and electron-deficient Ru sites at the heterointerfaces resulted in an optimal Ru-Co 3 O 4 heterostructure that exhibited outstanding catalytic activity for the hydrolysis of AB in the presence of NaOH. The heterostructure had an extremely high hydrogen generation rate (HGR) of 12238 mL min −1 g cat -1 and an expected high turnover frequency (TOF) of 755 mol H2 mol Ru -1 min −1 at 298 K. The activation energy needed for the hydrolysis was low (36.65 kJ mol −1 ). This study opens up a new avenue for the rational design of high-performance catalysts for AB dehydrogenation based on the Mott-Schottky effect.
研究领域:
催化化学
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能源材料
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纳米材料科学
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表面科学
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氢能源技术
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高影响因子
CRYSTAL GROWTH & DESIGN
·
2016
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IF 4.425
Huihui Chen,Mei Yang,Sha Tao,Mingyue Ren,Guangwen Chen
Co3O4 nanoparticles (NPs) with tubular and hollow structures were successfully synthesized by the formation of CoOOH and subsequent high-temperature calcination in air. The as-synthesized Co3O4 retained the morphologies of CoOOH. Therefore, the key step for the synthesis of Co3O4 was the controllable preparation of CoOOH NPs with tubular and hollow structures, which were prepared through a facile strategy involving the oxidation of β-Co(OH)2 under strong basic conditions (template-free, aqueous solution, and mild temperature). The morphology of CoOOH was tuned by employing air and H2O2 as the oxidizing agents which possessed different oxidation abilities and thus resulted in different oxidation kinetics. The plausible formation mechanism of CoOOH NPs with tubular and hollow structures was both related to the Kirkendall effect. In contrast to the commercial Co3O4, the as-prepared Co3O4 NPs with tubular and hollow structures showed superior catalytic activities for the decomposition of H2O2. The reaction rate constants of the as-prepared Co3O4 NPs with tubular and hollow structures were over 100 times the value of the commercial one.
研究领域:
材料科学
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纳米技术
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催化化学
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无机化学
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高影响因子
MICROCHEMICAL JOURNAL
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2026
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IF 5.1
Fan Wu,Junyao Li,Ning Gu,Wenxin Huang,Datong Wu,Wenrong Cai,Zheng-Zhi Yin,Yong Kong
Since d -glucose (D-Glu) plays significant roles in energy generation and metabolite production while l -glucose (L-Glu) cannot be metabolized, discrimination and detection of Glu enantiomers is of great importance for people's daily life. Herein, chiral Au/Co 3 O 4 nanoclusters are synthesized by using L-cysteine (L-Cys) as the chiral inducer and Au 3+ as the self-assembly inducer. The introduction of Au can also enhance the conductivity of the chiral Au/Co 3 O 4 . The resulting L-Au/Co 3 O 4 nanoclusters show higher affinity toward L-Glu due to the consistent chirality of L-Au/Co 3 O 4 nanoclusters and L-Glu, which can be used for the electrochemical discrimination and detection of Glu enantiomers. Accordingly, the D-Au/Co 3 O 4 nanoclusters synthesized by using D-Cys as the chiral inducer show higher affinity toward D-Glu, and thus they can also be used for the electrochemical discrimination and detection of Glu enantiomers. The chiral Au/Co 3 O 4 exhibits high selectivity, reproducibility and stability when used for the discrimination of Glu enantiomers. Although the linear range is relatively narrow (0.05–1.5 mM), both chiral discrimination and electrochemical detection can be achieved by the proposed dual-functional sensor, which is quite different from the common Glu sensors.
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Journal of Materials Chemistry A
·
2026
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IF 9.2
Junchao Duan,Wanyin Xu,Tianhe Gao,Xiaolian Li,YaXuan Sun,Wenkang Miao,Dongling Jia,Heguang Liu,Qianqian Li
Cobalt is an interesting candidate to catalytically convert CO2 gas to value-added chemicals through a thermal hydrogenation reaction. However, its catalytic activity and long-term stability are strongly hindered by its dispersion and phase state. In this work, we deeply investigate the dispersion and reduction behavior of a Co3O4 nano-sized catalyst and precisely optimize its catalytic properties in CO2 hydrogenation by modulating the dispersion and metal–support interactions. Finally, it achieves a stable CO2 conversion of 28% with CH4 selectivity above 85% during a 30 hour longevity test. The improvement is attributed to the strengthened metal–support interaction between Co3O4 nanoparticles (NPs) and the g-C3N4 carrier, which stabilizes the active metallic Co species and significantly boosts catalytic activity and durability. This study provides valuable insights into the structural requisites for optimizing CO2 hydrogenation catalysts and offers a feasible strategy for designing efficient non-noble metal catalysts for CO2 utilization.
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高影响因子
IONICS
·
2026
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IF 3.4
Xiang Yao
The development of efficient Metal-Nitrogen-Carbon (M-N-C) electrocatalysts is typically hindered by complex synthesis procedures and high-temperature treatments that often lead to active site aggregation. Herein, we report a facile, room-temperature plasma-driven strategy to engineer a high-performance Co 3 O 4 @GR-N composite, effectively circumventing these limitations. Unlike conventional thermal methods, this strategy utilizes a synergistic N 2 /H 2 plasma atmosphere to simultaneously achieve high-level N-doping of the graphene support and targeted enrichment of oxygen vacancies (O Vs ) in Co 3 O 4 . This dual-optimization creates a robust Co-N-C interface that electronically modulates the active sites while maximizing their exposure. Consequently, the optimized catalyst exhibits significantly enhanced Oxygen Evolution Reaction (OER) performance in alkaline media, delivering a current density of 10 mA cm − 2 at a low overpotential of 325 mV, significantly outperforming its thermally annealed counterparts. This work establishes the plasma strategy as a powerful, generalizable pathway for the precise defect engineering of advanced electrocatalysts without compromising structural integrity.
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高影响因子
ENVIRONMENTAL RESEARCH
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2026
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IF 8.2
Wei Wang,Ziyi Guo,Menglan Xu,Shengran Yu,Lvjun Jin,Hao Fang,Yanqing Cong,Shi-Wen Lv
To address the limitations of poor dispersion, slow charge transfer, and insufficient stability of Co-based catalysts in peroxymonosulfate (PMS) activation for antibiotic degradation, we innovatively modified Co 3 O 4 surface with phosphate group. Subsequently, the catalytic performance of the modified catalyst (denoted as P-Co 3 O 4 -2) for PMS activation for sulfamethoxazole degradation was systematically explored. Interestingly, the phosphate group modification can significantly enrich surface hydroxyl groups and oxygen vacancies on Co 3 O 4 . The increased hydroxyl groups can promote the hydrophilicity and aqueous dispersion of P-Co 3 O 4 -2, while the enhanced oxygen vacancies can accelerate metal valence cycle and interfacial charge transfer. As a result, the P-Co 3 O 4 -2 can effectively activate PMS to generate free radicals (SO 4 •– and •OH) and high-valent metal-oxo species (Co 4+ =O). In the P-Co 3 O 4 -2/PMS system, the highest removal efficiency of sulfamethoxazole was as high as 96.4% within 16 min, and possible pathway of sulfamethoxazole degradation was also studied. Additionally, surface-bound phosphate group acted as a protective layer, suppressing Co leaching and improving catalytic stability. In short, this work provided a novel and effective surface modification strategy for cobalt-based catalysts, offering a promising approach for the remediation of antibiotic-contaminated wastewater.
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PubMed
高影响因子
Catalysts
·
2023
·Vol. 13
·期 3
·588
·
IF 3.9
Haiou Zhang,Yixin Zhang,Huikang Song,Yan Cui,Yingying Xue,Cai-e Wu,Chao Pan,Jingxin Xu,Jian Qiu,Leilei Xu,Mindong Chen
As a toxic pollutant, carbon monoxide (CO) usually causes harmful effects on human health. Therefore, the thermally catalytic oxidation of CO has received extensive attention in recent years. The CuO-based catalysts have been widely investigated due to their availability. In this study, a series of transition metal oxides (Fe2O3, Co3O4and NiO) promoted CuO-based catalysts supported on the α-MnO2nanowire catalysts were prepared by the deposition precipitation method for catalytic CO oxidation reactions. The effects of the loaded transition metal type, the loading amount, and the calcination temperature on the catalytic performances were systematically investigated. Further catalyst characterization showed that the CuO/α-MnO2catalyst modified with 3 wt% Co3O4and calcined at 400 °C performed the highest CO catalytic activity (T90= 75 °C) among the investigated catalysts. It was supposed that the loading of the Co3O4dopant not only increased the content of oxygen vacancies in the catalyst but also increased the specific surface area and pore volume of the CuO/α-MnO2nanowire catalyst, which would further enhance the catalytic activity. The CuO/α-MnO2catalyst modified with 3 wt% NiO and calcined at 400 °C exhibited the highest surface adsorbed oxygen content and the best normalized reaction rate, but the specific surface area limited its activity. Therefore, the appropriate loading of the Co3O4modifier could greatly enhance the activity of CuO/α-MnO2. This research could provide a reference method for constructing efficient low-temperature CO oxidation catalysts.Keywords:transition metal oxides;CuO-based catalysts;Co3O4modification;α-MnO2nanowire;catalytic oxidation of CO
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Small Methods
·
2023
·Vol. 7
·期 7
·2300121
·
IF 12.4
Gaoyan Xiong,Chao Feng,Hsiao-Chien Chen,Junxi Li,Fei Jiang,Shu Tao,Yunxia Wang,Yichuan Li,Yuan Pan
This study adopts a facile and effective in situ encapsulation-oxidation strategy for constructing a coupling catalyst composed of atomically dispersed Pt-doped Co 3 O 4 spinel nanoparticles (NPs) embedded in polyhedron frames (PFs) for robust propane total oxidation. Benefiting from the abundant oxygen vacancies and more highly valent active Co 3+ species caused by the doping of Pt atoms as well as the confinement effect, the optimized 0.2Pt-Co 3 O 4 NPs/PFs catalyst exhibits excellent propane catalytic activity with low T 90 (184 °C), superior apparent reaction rate (21.62×10 8 (mol g cat −1 s −1 )), low apparent activation energy ( E a = 17.89 kJ mol −1 ), high turnover frequency ( 811×10 7 (mol g cat −1 s −1 )) as well as good stability. In situ diffuse reflectance infrared Fourier transform spectroscopy and density functional theory calculations indicate that the doping of Pt atoms enhances the oxygen activation ability, and decreases the energy barrier required for C H bond breaking, thus improving the deep oxidation process of the intermediate species. This study opens up new ideas for constructing coupling catalysts from atomic scale with low cost to enhance the activation of oxygen molecules and the deep oxidation of linear short chain alkanes at low temperature.
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高影响因子
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