ChemCatChem
·
2025
·
IF 3.9
Pengwei Deng,Haoran Wu,Huayu Wei,Zixu Yang,Jing Xu,Minghui Zhu
Graphical A modified synthesis method on Cu mesh simplifies and enhances the catalyst preparation process and efficiency at a much lower cost. The synergistic interplay between Co and Cu species is further investigated during the 5-hydroxymethylfurfural oxidation reaction. The Co-doped Cu mesh catalyst's scalability, cost-effectiveness, and robust performance underscore its potential for industrial applications in 5-hydroxymethylfurfural electrooxidation. The growing demand for sustainable alternatives to fossil-derived chemicals has spurred significant interest in biomass valorization, with 5-hydroxymethylfurfural (HMF) emerging as a key platform molecule. In this study, an electrochemical synthesis strategy was employed to synthesize a bimetallic Co-doped Cu mesh catalyst for the HMF oxidation reaction. It exhibited remarkable electrooxidation activity during a 3-h reaction at 1.6 V versus RHE with 83.2% HMF conversion, 99.4% 2,5-furandicarboxylic acid (FDCA) selectivity, and 87.7% Faraday efficiency. X-ray diffraction, in situ surface-enhanced Raman spectroscopy, and X-ray photoelectron spectroscopy revealed that the modified Cu mesh catalyst introduced more Co 3 O 4 species. Additionally, in situ attenuated total reflection surface-enhanced infrared absorption spectroscopy elucidated that Cu species on the Co-doped Cu mesh can adsorb *OH and couple with organic molecules during the reaction process. Cu─Co dual active sites enhance the selective electrochemical oxidation of HMF toward FDCA.
研究领域:
化学工程
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材料科学
·
可再生资源
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产品关联
DOI
高影响因子
ACS Nano
·
2024
·
IF 15.8
Ling Kang,Shude Liu,Qia Zhang,Jianxiong Zou,Jin Ai,Donghong Qiao,Wenda Zhong,Yuxiang Liu,Seong Chan Jun,Yusuke Yamauchi,Jian Zhang
Molybdenum sulfide (MoS2) is a promising electrode material for supercapacitors; however, its limited Mo/S edge sites and intrinsic inert basal plane give rise to sluggish active electronic states, thus constraining its electrochemical performance. Here we propose a hierarchical confinement strategy to develop ethylene molecule (EG)-intercalated Co-doped sulfur-deficient MoS2 (Co-EG/SV-MoS2) for efficient and durable K-ion storage. Theoretical analyses suggest that the intercalation-confined EG and lattice-confined Co can enhance the interfacial K-ion storage capacity while reducing the K-ion diffusion barrier. Experimentally, the intercalated EG molecules with mildly reducing properties induced the creation of sulfur vacancies, expanded the interlayer spacing, regulated the 2H–1T phase transition, and strengthened the structural grafting between layers, thereby facilitating ion diffusion and ensuring structural durability. Moreover, the Co dopants occupying the initial Mo sites initiated charge transfer, thus activating the basal plane. Consequently, the optimized Co-EG/SV-MoS2 electrode exhibited a substantially improved electrochemical performance. Flexible supercapacitors assembled with Co-EG/SV-MoS2 delivered a notable areal energy density of 0.51 mW h cm–2 at 0.84 mW cm–2 with good flexibility. Furthermore, supercapacitor devices were integrated with a strain sensor to create a self-powered system capable of real-time detection of human joint motion.
研究领域:
材料科学
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能源存储
·
电化学
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DOI
PubMed
高影响因子
Desalination and Water Treatment
·
2024
·
IF 1
Chao Wang,Su Xu,WenChao Liao,TsingHai Wang
Manganese oxide-based catalysts have been frequently adopted to activate peroxymonosulfate (PMS) for the degradation of refractory contaminants such as sulfamethoxazole (SMX). In this study, the Co-doped ɑ-MnO 2 catalyst was prepared to validate the concept that the introduction of additional oxidation states and structural defects due to the doping process would significantly enhance the efficiency of PMS activation. Among all Co@ ɑ-MnO 2 catalysts prepared, the activator with the mole ratio of Co/Mn 0.05:1 exhibited the highest SMX degradation. A near 100% removal of SMX (1000 μ g / L ) was achieved within 1 min in a condition with 10.0 mmol/L PMS and 0.5 g/L Co 0.05 @ ɑ - MnO 2 at 25 ℃ . The effects of catalyst dose, PMS concentration, initial SMX concentration, solution pH, temperature, and coexisting cations, anions, and humic acid (HA) on SMX degradation were studied. The impressive sustainability of the Co 0.05 @ ɑ-MnO 2 /PMS system was confirmed by its capability of operating over a wide pH range, its stability after multiple cycles, and its insensitivity to the coexisting of cations. The presence of high electrophilic anions, such as NO 2 ¯ and HCO 3 ¯ , on the other hand, would compromise the SMX degradation. Furthermore, reactive oxygen species (ROS) generated in the Co@ ɑ-MnO 2 /PMS system were identified by scavenger tests and electron paramagnetic resonance (EPR). Singlet oxygen ( 1 O 2 ) was verified to be the major route contributing to the degradation of SMX. In addition, sulfate radicals ( SO4 •¯ ), superoxide radicals (O 2 •¯ ), and hydroxyl radicals (ּ • OH) were also generated in the Co@ ɑ-MnO 2 /PMS system and participated in SMX degradation. Therefore, the Co@ ɑ-MnO 2 is a promising catalyst for PMS activation in the degradation of SMX.
研究领域:
环境科学
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化学工程
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产品关联
DOI
高影响因子
JOURNAL OF RARE EARTHS
·
2025
·
IF 7.2
Zijun Huang,Xiaohua Cao,Huaiyu Xu,Miao Lin,Dedong He,Dingkai Chen,Jichang Lu,Yongming Luo
Methyl mercaptan (CH 3 SH) is notorious for global air pollution owing to its odorous characteristics and adverse health effects. Although CeO 2 is currently regarded as a promising catalyst for CH 3 SH decomposition, the high conversion temperature followed by high energy consumption is still a bottleneck. Herein, the cobalt-doped CeO 2 catalyst was synthesized by a facile one-pot preparation strategy and successfully reduces the decomposition temperature from 450 to 250 °C. Further studies demonstrate that the excellent low-temperature catalytic activity of Co 0.6 Ce 0.4 O 2– σ is attributed to its abundant oxygen vacancies and reactive oxygen species. Oxygen vacancies promote the adsorption and dissociation of CH 3 SH, while reactive oxygen species facilitate the decomposition of CH 3 SH. Moreover, Co acts as a sacrificial agent for the adsorption of sulfur species in CH 3 SH, while Ce is responsible for the adsorption and activation of CH 3 SH as the active metal phase. Furthermore, the migration and transformation mechanism of CH 3 SH on the surface of Co 0.6 Ce 0.4 O 2– σ was determined via in situ diffuse reflectance infrared Fourier transform spectra ( in situ -DRIFTS). This work provides a new strategy to synthesize high-performance catalysts for decomposing sulfur-containing volatile organic compounds (VOCs) at low temperatures, which is beneficial to decreasing the energy consumption.
研究领域:
环境科学
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催化化学
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产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2025
·
IF 9
Yilong Zhu,Huifang Xing,Shan Ni,Ke Xu,ZhaoXiang Zhong,Liangrong Yang
The recycling of precious materials, such as palladium (Pd), was repeatedly documented as essential for a sustainable future with respect to the environment and energy production. However, high-efficiency extraction presented significant challenges. In this work, a surface hydroxyl regulation strategy was used to prepare a defective carbon nitride (CN) with a high specific surface area and hierarchical porosity through cobalt (Co)-doping. Characterization confirmed the successful synthesis of the adsorbent. The results indicated that the optimal pH for the adsorption process was 5.5, adsorption kinetics and isotherms of Pd on the adsorbent suggested that the adsorption followed a pseudo-second-order model and the Langmuir model, respectively. The maximum adsorption capacity reached up to 529.1 mg·g –1 . In addition, it showed high affinity for Pd ions, the K d value was 4.1 × 10 4 ml·g –1 . After Pd adsorption, due to the presence of abundant and uniformly dispersed Pd and Co particles which further facilitated cooperative catalysis on the surface of adsorbent, As a result, the Co-CN-Pd was reused as a catalyst for p-nitrophenol hydrogenation. It achieved a turnover frequency (TOF) as high as 1032.6 h –1 , significantly surpassing other catalysts reported in the literature. Overall, this novel adsorbent presented broad application prospects in the field of Pd recovery and reuse.
研究领域:
环境科学
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材料科学
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化学工程
✓ 已验证
产品关联
DOI
高影响因子
Carbon Capture Science & Technology
·
2022
·
IF 0
Xinrui Wang,Shanshan Xu,Weiting Yang,Xiaolei Fan,Qinhe Pan,Huanhao Chen
This study presents an investigation of using Co doping strategy to improve the Ni on mesoporous SBA-15 catalyst for promoting catalytic dry reforming of methane (DRM) under non-thermal plasma (NTP) conditions. The work was conducted by following the conventional procedures including pre-/post-reaction characterisation of the relevant catalysts, comparative assessment of various scenarios under the NTP condition and longevity tests. However, we found that the performance enhancement of the NTP system was mainly due to the use of the catalytically inert SBA-15 packing, rather than the variation of metal species on it though the results suggest the possible surface reactions on the metal surfaces. Hence, under the NTP condition, the so-called DRM might be mistaken because (i) the production of H 2 and CO was likely due to the electron-impact dissociation of CO 2 /CH 4 in gas discharge and (ii) surface reactions on a DRM catalyst are rather insignificant. We then carefully analysed and reflected on the findings and proposed further research questions to be shared with the colleagues in the field of NTP catalysis.
研究领域:
化学工程
·
催化科学
✓ 已验证
DOI
CRYSTENGCOMM
·
2019
·Vol. 21
·期 12
·1876-1885
·
IF 3.382
Xiaole Zhang,Dalei Song,Qi Liu,Rongrong Chen,Jingyuan Liu,Hongsen Zhang,Jing Yu,Peili Liu,Jun Wang
Pure and 1–4 mol% cobalt doped indium oxide (Co-doped In2O3) sponge-like microstructures with high specific surface area were fabricated by a simple and environmentally friendly hydrothermal method. The specific surface area and porosity of Co-doped sponge-like In2O3 microstructures can be regulated through the modulation of Co/In molar ratios. The as-prepared sensors based on Co-doped In2O3 exhibit favorable gas sensing properties toward acetone gas; their porous structure can create more adsorption sites for the adsorption of oxygen molecules and the diffusion of the target gas, leading to significant improvement in sensing performance. In particular, 3 mol% Co-doped In2O3 presents the greatest response to acetone vapor at 240 °C, which is about 3.25 times higher than that of pure In2O3. The sensor also exhibits rapid response-recovery time (1.143 s/37.5 s), low detection limit (2.76 at 5 ppm), good reproducibility and high selectivity, making it a promising material for acetone detection.
研究领域:
材料科学
·
传感器技术
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产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Jihong Bian,Kangning Wang,Jinbo Zhang,Yanzhong Zhen,Jianwei Wang,Yaodong Yang,Feng Fu
Shortage of energy and computing power puts forward requirements for developing multifunctional devices. Inherent defects greatly limit the development of transition metal oxides as promising candidate for energy storage and memory applications. We propose a facile strategy to modify MnO 2 via controlling the doping amount of Co, effectively regulating the structural, magnetic and electrical properties. The 15.78 %Co-MnO 2 is nano-flower-like in δ phase with a specific surface area of 123.86 m 2 g −1 and rich oxygen vacancies. Its corresponding memristors exhibit stable and repeatable, sweep speed-dependent and voltage magnitude-dependent volatile bidirectional threshold switching behavior with high switching ratio of 10 4 over 1100 cycles, which is attributed to the formation and rupture of conductive filaments formed by a large number of oxygen vacancies and a small number of Co ions under the electric field. By controlling the applied voltage and compliance current, multilevel resistance states are shown. Besides, 15.78 %Co-MnO 2 also exhibits excellent zinc storage performance, due to its large specific surface area, nano-sized structure and abundant oxygen vacancies. This work lays a foundation for developing high-performance and low-dimensional memristor devices and capacitors, and paves a way for low-power multifunctional devices.
研究领域:
材料科学
·
电子工程
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产品关联
DOI
高影响因子
CRYSTENGCOMM
·
2019
·Vol. 21
·期 48
·7528-7534
·
IF 3.382
Xiao Zhang,Bonan Liu,Yaohua Xu,Hao Liu,Wenrui Zhao,Penghui Wang,Anjie Ming,Feng Wei
Semiconductors are widely used as basic materials in commercial ethanol detection sensors. In this work, SnO2 sensors were modified by a Co doping method to obtain Co-SnO2 for gaseous ethanol detection. For investigating the best sensing performance and elucidating the underlying catalytic mechanism, the effects of the Co/Sn feed ratio and calcination temperature during sample preparation were examined. The sample with a Co/Sn feed molar ratio of 1.0 calcined at 500 °C (D3-Co-SnO2) possessed better ethanol sensitivity than other samples. The best response to 100 ppm gaseous ethanol (i.e., ratio of sensor resistance in air to that in ethanol) was 105.2 at an operating temperature of 350 °C. More importantly, D3-Co-SnO2 achieved a low detection limit of 1 ppm and apparently higher selectivity over various gases (e.g., acetone, hydrogen, methane, etc.). The enhanced sensing performance was attributed to (1) the incorporation of Co atoms, which increased the number of oxygen vacancies and active sites; (2) the catalytic activity of Co(III) and Co(II), which changed the reaction process; and (3) the suitable pore size, which led to effective diffusion of the gas molecules.
研究领域:
材料科学
·
化学
✓ 已验证
产品关联
DOI
高影响因子
Molecular Catalysis
·
2021
·
IF 5.062
Jing Cao,An Li,Yicen Zhang,Linchao Mu,Xi Huang,Yankun Li,Tao Yang,Cen Zhang,Congshan Zhou
To prepare catalyst with high activity, high selectivity and good stability remains the biggest challenge in the hydrodeoxygenation (HDO) of phenols by adopting MoS 2 -based sulfides as catalysts. Herein, we report a simple hydrothermal method to synthesize highly-dispersed nano-MoS 2 with abundant defects and some curved slabs. All these advantages enable nano-MoS 2 to provide a large number of coordination unsaturated sites to anchor Co atoms. The unsupported Co-doped catalyst with an optimal Co/(Co + Mo) molar ratio of 0.3 exhibited excellent performance in the HDO of p -cresol with conversion of 98.7 % and toluene selectivity of 98.9 % at 220 °C. Moreover, the optimized Co/MoS 2 -0.3 catalyst had a good stability after reaction of 72 h. The excellent HDO performance was attributed to the formation of abundant Co-Mo-S active sites which optimize the electrical structure of nano-MoS 2 by Co promoter.
研究领域:
催化化学
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材料科学
·
能源化学
✓ 已验证
产品关联
DOI
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2023
·
IF 22.1
Wentao Li,Kezhen Qian,Zixu Yang,Xiaoxu Ding,Wenmin Tian,Dezhen Chen
Microwave-initiated deconstruction of plastic into hydrogen and high-value carbons is an attractive upcycling technology. However, the interplay between microwave field and catalyst material and the reaction mechanism were not fully understood. In this study, Co doping Fe-Al catalysts were synthesized for hydrogen production from LDPE using microwave and conventional heating. The Fe1Co1Al2 catalyst yielded hydrogen at 61.39 mmol/g plastic under microwave, which was almost two times higher than conventional heating. Characterization indicated Co doped spinel iron catalyst under microwave rapidly transformed into the highly active FeCo alloy for plastic dehydrogenation . The microwave field was responsible for the rapid formation of FeCo, as it enhanced the charge transfer from H to Fe. The Co doping also inhibited the formation of Fe 3 C during plastic deconstruction, which changed the carbon diffusion pathway and promoted the formation of nanotubes and hydrogen production.
研究领域:
化学工程
·
材料科学
·
能源技术
✓ 已验证
产品关联
DOI
高影响因子
RSC Advances
·
2017
·Vol. 7
·期 68
·42819-42825
·
IF 3.108
Yanghe Fu,Huan Yang,Rongfei Du,Gaomei Tu,Chunhui Xu,Fumin Zhang,Maohong Fan,Weidong Zhu
Co-doped NH2-MIL-125(Ti) catalysts [Co/NH2-MIL-125(Ti)] are developed for the photocatalytic reduction of CO2 upon visible-light irradiation. Compared with NH2-MIL-125(Ti), Co/NH2-MIL-125(Ti) exhibits a significantly enhanced activity in CO2 reduction, due to the fact that the doping of Co nanoparticles onto NH2-MIL-125(Ti) can promote the visible-light harvesting and electron transfer. In addition, when benzylic alcohols as electron donors, instead of triethanolamine (TEOA) which is often used as a sacrificial agent, are added into the reaction system, Co/NH2-MIL-125(Ti) can simultaneously catalyze CO2 reduction to formic acid (HCOOH) and the selective oxidation of the benzylic alcohols to the corresponding aldehydes, making the proposed process more economical and environment-friendly.
研究领域:
材料科学
·
环境科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）