APPLIED CATALYSIS B-ENVIRONMENTAL
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2013
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IF 5.825
Yanhong Zu,Panpan Yang,Jianjian Wang,Xiaohui Liu,Jiawen Ren,Guanzhong Lu,Yanqin Wang
Ru/Co 3 O 4 catalyst prepared by a simple coprecipitation method, was used to catalyze the conversion of 5-hydroxymethylfurfural (HMF) into 2,5-dimethylfuran (DMF) for the first time and exhibited excellent catalytic performance. 93.4% yield of DMF was achieved at relatively low reaction temperature and H 2 pressure (130 °C, 0.7 MPa). Further studies showed that Ru is responsible for hydrogenation, while CoO x species played important role in the hydrogenolysis of hydroxyl groups. Besides, this catalyst also displayed a good reusability and can be used for 5 times without loss of the activity.
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GREEN CHEMISTRY
·
2024
·
IF 9.3
Genyan Hao,Tao Zhao,Qiang Fang,Yunzhen Jia,Dandan Li,Dazhong Zhong,Jinping Li,Qiang Zhao
Exploring Earth-abundant and efficient electrocatalysts to replace Ir and Ru for the acidic oxygen evolution reaction (OER) is essential to reduce the cost of clean hydrogen production. Here, we show that trace amounts of electronegative non-metallic element fluorine (F)-doped Co3O4 nanoneedles improve the activity and stability of Co3O4. The F-doped Co3O4 nanoneedles supported on carbon paper (F-Co3O4/CP) exhibit an overpotential of 350 mV at 10 mA cm−2 for the acidic OER. In addition, their performance remains consistent after continuous operation for 80 h. Detailed investigations reveal that introducing an anion promotes the enrichment of OH on the surface of Co3O4 and prevents acid corrosion, thereby enhancing the intrinsic OER activity and stability. Theoretical calculations further indicate that F doping can effectively improve electron transfer and optimize the energy barrier for the formation of *OOH intermediates, which significantly improves OER performance. This study provides guidance for designing efficient and stable non-noble metal acidic water oxidation catalysts.
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CHINESE JOURNAL OF CHEMISTRY
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2024
·
IF 5.5
Dongxiao Wang,Zheng Lan,Yue Li,Ying Huang,Kun Yin,Lixia Yang,Liangjiu Bai,Donglei Wei,Huawei Yang,Hou Chen,Mingchuan Luo
Comprehensive Summary Photocatalytic aerobic oxidative desulfurization (PAODS) is a sustainable alternative technology to traditional, energy-intensive fuel desulfurization methods. Nonetheless, its advancement is hindered by the notable challenge of inadequate electron-hole separation efficiency within the existing catalytic systems. Herein, a Janus 2D/2D heterostructure composed of Co 3 O 4 and CoMoO 4 is reported for the PAODS of thiophenic sulfides. Through a combination of detailed experimental characterizations and density functional theory (DFT) calculations, we elucidate the formation of a type II p-n heterojunction in the catalyst, significantly enhancing electron-hole separation through electric field force and reducing the possibility of electron-hole recombination due to the spatial separation of redox centres. The photocatalyst exhibits exceptional activity and demonstrates an impressive performance of 10.4 mmol·g –1 ·h –1 in the oxidation of dibenzothiophene (DBT). Moreover, the photocatalyst demonstrates profound desulfurization capabilities in real diesel, reinforcing its promising prospects for industrial application. These discoveries provide invaluable insights, both scientifically and practically, towards the development of advanced photocatalysts for PAODS processes.
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CHEMICAL ENGINEERING JOURNAL
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2025
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IF 13.2
Cui Zhang,Zhaoli Liu,Xuan Ye,Weijia Mao,Jie Dong,Bin Li,Xueping Zhou,Jinyan Luo,Jianxiang Wu
Enhancing catalytic activity of peroxidase-like nanozymes is essential for developing ultrasensitive lateral flow immunoassay (LFIA). The peroxidase-like catalytic process involves spin-dependent electron transfer during radical formation, and boosting single electron transfer (SET) efficiency is therefore critical to enhance catalytic performance. Here, we fabricated a strained-Co 3 O 4 exhibiting significant atomic compressive strain (ε xx = −3.34 %, ε yy = −6.52 %). The atomic-level displacement direction and distance information determined by atomic displacement analysis (ADA) offer detailed information for density functional theory computational modeling. We discovered that the strain engineering elevated crystal field splitting energy, which promotes the transition of Co 3 O 4 from low-spin states ( t 2g 6 e g 0 ) to high-spin states ( t 2g 4 e g 2 ), resulting in efficient SET performance. Spin-state modulation dramatically enhances the peroxidase-like catalytic efficiency, resulting in 28.0-fold and 11.8-fold lower Michaelis constants ( K m ) for TMB and H 2 O 2 , respectively, than those of the pristine-Co 3 O 4 . In addition, the strained-Co 3 O 4 was successfully employed in the development of LFIA for Xanthomonas oryzae pv. oryzae ( Xoo ) monitoring, and the LFIA achieved a detection sensitivity of 5 × 10 2 CFU mL −1 that was 20-fold higher than Au nanoparticles-based LFIA and was 2–3 orders of magnitude higher than commercial LFIAs. Our findings established a correlation between strain–spin orbit–peroxidase-like activity, offering a promising strategy for the rational design of nanozymes.
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MATERIALS CHARACTERIZATION
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2025
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IF 5.5
Yuanyuan Ma,Yingkun Yang,Guoqin Chen,Chunyu Wang,Pingping Wang,Zengyan Wei,Puzhen Shao,Bo Zhong,Long Xia,Gaohui Wu
In the pursuit of high-performance electromagnetic wave (EMW) absorbing materials, achieving both strong absorption and broad bandwidth remains a significant challenge. The reasonable and effective design of special microstructures is a crucial aspect for achieving efficient microwave absorption performance in electromagnetic wave absorbing materials. This study presents a breakthrough by designing a novel multi-shell hollow Co₃O₄/graphite nanosheets (ms-Co₃O₄/GNs) composite integrated with dielectric MoS₂ layers via a precise-regulated solvent thermal bonding annealing method, which demonstrates exceptional microwave absorption properties. The optimized MoS 2 /Co 3 O 4 /GNs composites exhibit superior electromagnetic wave absorption properties with a remarkable minimum reflection loss of −49.3 dB at an ultrathin thickness of 1.5 mm. Furthermore, the composite achieves an ultra-wide effective absorption bandwidth (EAB, RL ≤ −10 dB) of 4.96 GHz at just 1.8 mm, covering critical frequency ranges for 5G and radar applications. The superior wave-absorbing properties primarily stems from its unique multi-shell hollow structure, abundant heterogeneous interfaces, and the optimized, nearly perfect impedance matching characteristics. This work not only advances the development of Co₃O₄-based absorbers but also provides a generalizable strategy for designing lightweight, broadband, and high-strength EMW absorption materials through intelligent microstructure engineering.
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Solar RRL
·
2019
·Vol. 3
·期 4
·1800315
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IF 0
Yang Zhou,Xiang Zhang,Xubing Lu,Xingsen Gao,Jinwei Gao,Lingling Shui,Sujuan Wu,Jun-Ming Liu
Carbon-based perovskite solar cells (PSCs) have gathered much attention due to their excellent thermal stability and low cost. However, the typically used hole-conductor-free PSCs based on carbon electrodes show the worst performance due to the serious charge recombination at the perovskite/carbon interface. In this work, the efficient and stable carbon-based CsPbI 2 Br PSCs using Co 3 O 4 as the hole transport material (HTM) are fabricated and their photoelectric properties are systematically investigated. It is found that the Co 3 O 4 inorganic HTM effectively promotes photo-generated charges separation and extraction, and suppresses charge recombination at the CsPbI 2 Br/carbon electrode interface, resulting in the improved photovoltaic performance. At the optimal Co 3 O 4 concentration, the carbon-based CsPbI 2 Br PSCs achieve the maximum efficiency of 11.21% with a negligible J – V hysteresis. This work provides a novel strategy to fabricate efficient and stable all-inorganic PSCs.
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RSC Advances
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2018
·Vol. 8
·期 54
·30794-30801
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IF 2.936
He Wang,Yan Song,Yanwei Li,Mengwei Wang,Qianli Ma,Wensheng Yu,Dan Li,Xiangting Dong,Jinxian Wang,Guixia Liu
To achieve a high power density of lithium-ion batteries, it is essential to develop anode materials with high capacity and excellent stability. Cobalt oxide (Co3O4) is a prospective anode material on account of its high energy density. However, the poor electrical conductivity and volumetric changes of the active material induce a dramatic decrease in capacity during cycling. Herein, a hierarchical porous hybrid nanofiber of ZIF-derived Co3O4 and continuous carbon nanofibers (CNFs) is rationally constructed and utilized as an anode material for lithium-ion batteries. The PAN/ZIF-67 heterostructure composite nanofibers were first synthesized using electrospinning technology followed by the in situ growth method, and then the CNFs/Co3O4 nanofibers were obtained by subsequent multi-step thermal treatment. The continuous porous conductive carbon backbone not only effectively provides a channel to expedite lithium ion diffusion and electrode transfer, but also accommodates volume change of Co3O4 during the charge–discharge cycling process. The electrode exhibits a high discharge capacity of 1352 mA h g−1 after 500 cycles at a constant current density of 0.2 A g−1. Additionally, the composites deliver a discharge capacity of 661 mA h g−1 with a small capacity decay of 0.078% per cycle at a high current density of 2 A g−1 after 500 cycles. This hierarchical porous structural design presents an effective strategy to develop a hybrid nanofiber for improving lithium ion storage.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2026
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IF 9.6
Jingyi Zhang,Yuwei Li,Zongyao Guo,Yuxin He,Ying Huang,Xinquan Shen,Dan Wu
Urea tailors Co 3 O 4 nanoflakes, Co–N coordination, and interfacial disorder. • Co 3 O 4 /NF-5 reaches 1000 mA cm −2 at 1.39 V with >84.1% formate FE. • CoOOH-mediated electrochemical-chemical turnover governs glycerol oxidation. • A GOR||HER MEA sustains 200 mA cm −2 at 1.9 V for 216 h. • Techno-economic analysis estimates a net profit of $3085.7 per ton of glycerol. Electrochemical glycerol oxidation offers a sustainable pathway for valorizing biodiesel-derived glycerol while lowering the energy demand of hydrogen production. However, Co-based catalysts are often limited by inefficient coupling between the electrochemical generation and chemical consumption of oxidized Co species. Herein, a urea-mediated strategy is developed to simultaneously tailor the morphology, surface electronic structure, and local structural order of Co 3 O 4 electrodes. Urea directs the formation of vertically aligned nanoflakes, introduces Co–N coordination, increases the surface Co 3+ /Co 2+ ratio, and generates defect-rich crystalline-amorphous interfacial regions. The optimized Co 3 O 4 /NF-5 electrode delivers 1000 mA cm −2 at 1.39 ± 0.02 V, maintains a formate Faradaic efficiency above 84.1 ± 1.4% over 1.3–1.8 V, and exhibits only 3.1% activity decay after 5000 cycles. Electrochemical kinetic analysis, in situ Raman spectroscopy, and potential-step measurements reveal efficient electrochemical–chemical turnover mediated predominantly by CoOOH species, with transient Co 4+ -associated species potentially contributing at elevated potentials. Density functional theory calculations further indicate that N incorporation modulates Co 3 d states and strengthens reactant adsorption. An integrated electrolyzer operates continuously for 216 h, demonstrating device-level durability and favorable preliminary techno-economic prospects. These findings establish coupled morphological and electronic regulation as an effective strategy for promoting electrochemical–chemical turnover in glycerol electrooxidation. Download: Download high-res image (154KB) Download: Download full-size image
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GREEN CHEMISTRY
·
2026
·
IF 10.6
Li Yao,Shao YE,Zhe Li,Mingjie Tuo,Yibin Cui,Zhenbin Wang,Zhenhua Xie,Wenlei Zhu,Bo Shen
Widespread nitrate contamination in water challenges both aquatic ecosystems and drinking water safety, and the electrocatalytic nitrate reduction to ammonia (eNRA) presents a promising sustainable way to convert pollutants to value-added products. However, most existing eNRA systems operate efficiently only under highly alkaline and concentrated conditions that are incompatible with real wastewater. Here, we report a hollow heterostructured Co3O4/CuO catalyst which permits efficient eNRA in neutral aqueous media over a wide range of environmentally relevant nitrate concentrations (1-250 mM). The catalyst achieves NH3 Faradaic efficiencies above 97% in the 10-250 mM nitrate range and maintains 86% even at 1 mM nitrate. Furthermore, the catalyst showed excellent stability over 100 hours of continuous operation. In situ Fourier transform infrared spectroscopy analysis suggests that the hollow architecture creates a spatially confined microenvironment that accelerates the hydrogenation of NOx intermediates toward NH₃, and density functional theory calculations indicate the ensemble effect of Co3O4/CuO interface in reducing the free-energy changes of key nitrate reduction steps. This work highlights a structure engineering strategy in electrocatalysts for efficient nitrate remediation and wastewater treatment.
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JOURNAL OF THE INDIAN CHEMICAL SOCIETY
·
2026
·Vol. 103
·期 5
·102576
·
IF 3.4
Xingyu Liu,Huiyang Li,Guoli Zhao,Weiya Yang
Catalytic hydrolysis of ammonia borane presents a promising pathway for hydrogen production. Herein, pyroligneous acid, a byproduct of biomass pyrolysis, was employed for the green synthesis of a NiO–Co 3 O 4 –CuO microparticle catalyst, and the catalytic performance for hydrogen evolution via ammonia borane hydrolysis was evaluated. The synergistic effects among CuO, NiO and Co 3 O 4 were found to significantly enhance catalytic activity. The porous structure of the catalyst facilitated the catalytic reaction. The optimized green-synthesized NiO–Co 3 O 4 –CuO catalyst demonstrated exceptional hydrogen production efficiency of 1153 mL⋅g −1 ⋅min −1 , validating the advantages of plant-derived extracts as both reducing and stabilizing agents in catalyst preparation. These findings provide critical insights for designing high-performance oxide catalysts for ammonia borane hydrolysis. With its cost-effectiveness and superior catalytic performance, the NiO–Co 3 O 4 –CuO catalyst emerges as a prime candidate for practical hydrogen production applications. Furthermore, this research highlights the substantial potential of environment friendly synthesis approaches in developing advanced energy conversion materials.
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CERAMICS INTERNATIONAL
·
2026
·
IF 6
Chongchen Pang,Mengyuan Ren,Xu Li,Qingji Wang
Carbon monoxide is a colorless and odorless, highly toxic gas, posing a significant risk to both human health and industrial safety. Zinc oxide has garnered significant interest for its outstanding chemical stability and cost-effectiveness in the development of CO sensors. However, sensors based on a single ZnO has the shortcomings of low sensitivity and high detection limit, rendering them challenging to meet the precise detection requirements for CO. To address this issue, ZnO nanoflower arrays were prepared by chemical bath deposition (CBD), followed by modification of varying ratios of Co 3 O 4 and NiO onto the ZnO nanoflower arrays. The response value of the sensor based on Co 3 O 4 -NiO/ZnO-2 to 100 ppm CO was 104% at 310 °C. Remarkably, the sensor achieved an exceptionally low detection limit of 1 ppb. Further, the crystal structure and morphology characteristics of Co 3 O 4 -NiO/ZnO were systematically analyzed by XRD, SEM, TEM, XPS, Raman, EDS, EPR, and BET. The results show that the improvement in gas-sensing performance is mainly ascribed to the ZnO nanoflower array and the heterojunctions formed among Co 3 O 4 , NiO and ZnO. In this study, Co 3 O 4 and NiO decorated ZnO nanoflower arrays were prepared by a two-step CBD, offering a novel approach for advancing high-performance CO sensors.
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APPLIED SURFACE SCIENCE
·
2026
·
IF 6.6
Wen Yang,Yinze Yang,Yun Lou,Zhuhe Zhai,Shengqiang Chen,Yafei Zhao,Huishan Shang,Bing Zhang
Developing core–shell heterostructured photocatalysts with delicate morphology control is deemed as an universal and effective strategy to expedite the separation/transfer of photogenerated carriers toward enhanced photocatalytic hydrogen generation. Herein, a core–shell heterostructure (Co 3 O 4 @ZIS) was constructed with ZnIn 2 S 4 (ZIS) nanosheet as shell and Co 3 O 4 nanorod as core for efficient photocatalytic hydrogen production. As expected, the optimized 4 wt% Co 3 O 4 @ZIS displays a distinguished photocatalytic hydrogen production performance with hydrogen generation rate of 3407.1 µmol g −1 h −1 (about 8.21 times of pure ZIS) and remarkable stability, exceeding most of the ZIS-based photocatalyst in previous reports. The boosted performance is stemmed from the unique core–shell heterostructure of Co 3 O 4 @ZIS, which provides enhanced light absorption and tightly bonded interface, thus accelerating the migration and hindering the recombination of the photoinduced of charge carriers. This work proposes a bright prospect for ZIS based core–shell heterostructures for photocatalytic hydrogen production from water in the presence of TEOA as a sacrificial agent.
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