JOURNAL OF ALLOYS AND COMPOUNDS
·
2021
·
IF 5.316
Shuyue Yang,Zhen Xu,Jie Xu,Junlin Lu,Dongmei Zhang,Shibing Ni
Nitrogen doped carbon bridged Li 3 VO 4 -Ga 2 O 3 hybrid (Li 3 VO 4 -Ga 2 O 3 /NC) is first synthesized through an intermediate solution method with subsequent annealing. The Li 3 VO 4 -Ga 2 O 3 /NC hybrid exhibits robust pseudocapacitive charge storage owing to the synergetic effect between each component, resulting in ultra-high capacity and ultra-stable cyclability as anode for Li-ion batteries. At a specific current of 0.1 A g −1 , the Li 3 VO 4 -Ga 2 O 3 /NC electrode delivers high reversible capacity of 652.6 mA h g −1 after 400 cycles, without obvious capacity attenuation over cycling. After three periodic rate performance testing from 0.1 to 2.0 A g −1 over 260 cycles, the Li 3 VO 4 -Ga 2 O 3 /NC electrode delivers high discharge capacity of 750.3 mA h g −1 when reverting current to 0.1 A g −1 . The Li 3 VO 4 -Ga 2 O 3 /NC electrode also shows excellent long cycle stability at 1.0 A g −1 , delivering high discharge capacity of 450.4 mA h g −1 after 1600 cycles.
研究领域:
材料科学
·
电化学
·
能量存储
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
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
·
绿色化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2023
·
IF 6.2
Xinle Wang,Jin Chen,Yuzhao Ma,Jianye Shi,Yueying Wang,Xiaofeng Yang,Meidan Que,Yuxi Zhou,Yanjun Li
Two-dimensional (2D) transition metal carbide MXene (Ti 3 C 2 T x ) exhibits great potential in electromagnetic wave (EMW) absorbing materials due to its abundant surface functional groups and defects, tunable conductivity and high specific surface area. The Co@NC/TiO 2 /C composites were successfully synthesized through a solvothermal method and carbonization process using Ti 3 C 2 T x /Co-BTC as precursor. The incorporation of magnetic metal Co nanoparticles and Rutile-TiO 2 effectively addresses the issue of single loss mechanism in Ti 3 C 2 T x . The results show that CTC-100 exhibits excellent EMW absorption performance with a minimum reflection loss (RL) value of −51.3 dB at a thickness of only 1.48 mm, and the corresponding effective absorption bandwidth is (EAB, RL < −10 dB) 4.3 GHz. Simultaneously, by adjusting the matching thickness of the material from 1.29 mm to 5.0 mm, the EAB can achieve 15.42 GHz (from 2.85 GHz to 18 GHz). The excellent EMW absorption performance of CTC-100 composite is primarily attributed to the synergistic effect of magnetic loss and dielectric loss. This study provided an effective strategy for the design of Ti 3 C 2 T x -based EMW absorbing materials with high absorption intensity, reduced thickness, and broad effective absorption bandwidth (EAB).
研究领域:
材料科学
·
电磁学
✓ 已验证
产品关联
DOI
高影响因子
APPLIED ORGANOMETALLIC CHEMISTRY
·
2024
·Vol. 38
·期 8
·e7556
·
IF 3.7
Muhammad Jawad Ahmad,Xue Lu,Liye Liang,Guangming Li
Since catalytic chemoselective reduction of corresponding nitroarenes is a significant route to produce functionalized anilines, developing inexpensive and highly active catalyst is imperia. Herein, the Co-Ce-H 2 salen-hmta composite was first prepared by grinded completely the mixture of Co-H 2 Salen and hexamethylenetetramine (hmta) in 1:1 mol ratio in a mortar. The 3d–4f hetero-metal Co-Ce-H 2 salen coordination polymer acted as a support precursor and hmta provided the nitrogen source. Then, a target catalyst of Co/NC-CeO 2 -hmta were afforded by pyrolysis of Co-Ce-H 2 salen-hmta composite at 800°C in the presence of argon atmosphere. When the target catalyst of Co/NC-CeO 2 -hmta and reference catalysts were applied for the hydrogenation of nitroarenes under N 2 H 4 , the target catalyst of Co/NC-CeO 2 -hmta exhibited better performance than reference catalysts in terms of conversion, yield, selectivity, and recyclability. Spectral analysis suggested that the high catalytic performance of a target catalyst of Co/NC-CeO 2 -hmta were attributed to highly dispersed metallic Co 0 , rich oxygen vacancies, and nitrogen-doped carbon matrix.
研究领域:
化学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2023
·
IF 6.2
Huaqi Wang,Chenghong Sun,Enze Zhu,Chaoyang Shi,Jie Yu,Mingli Xu
Metal–organic framework (MOF)-derived carbon materials have emerged as important candidates in the field of catalysis because of their simple synthesis, easy construction, good conductivity, and high catalytic activity. Fe 3 C nanoparticles prepared from MOFs facilitate the catalytic activity of adjacent single atoms and exhibit powerful catalytic properties. In this work, a composite structured catalyst with Fe 3 C, Co nanoparticles, and M-N x single atoms (M = Co, Fe) was synthesized (denoted as Fe 3 C-Co-NC) by constructing Fe-doped bilayer zeolitic imidazolate frameworks (ZIFs) with a core–shell structure, which were used as bifunctional catalysts for oxygen reduction reaction (ORR) and oxygen evolution reaction (OER). The Fe 3 C-Co-NC catalyst exhibits superior half-wave potential ( E 1/2 = 0.89 V) and overpotential ( E j=10 = 1.67 V) and outperforms the commercial Pt/C and RuO 2 . This result can be attributed to the high specific surface area, hierarchical pore structure , and high graphitization degree of the Fe 3 C-Co-NC catalyst, especially the synergistic effect between Fe 3 C and adjacent single-atom active sites. Specifically, the Zn–air battery assembled using the Fe 3 C-Co-NC catalyst displays high peak power density (203 mW cm −2 ) and specific capacity (815 mAh g −1 ) without degradation after charge/discharge cycles for 57 h. Therefore, this work offers important insights into the design and research of high-performance ORR/OER bifunctional catalysts.
研究领域:
催化材料
·
能源化学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING SCIENCE
·
2025
·
IF 4.3
Xin Zhang,Le Zhou,Yu Han,Zhi-Rong Fu,Yu-Wei Xiang,Bao-Ju Wang,Yong Luo
The synthesis of aminoaromatic sulfonic acid (ASA) compounds by catalytic hydrogenation of nitroaromatic sulfonic acid (NSA) compounds is a promising process due to its environmental friendliness. However, the catalysts for NSA hydrogenation have the problems of high cost and easy inactivation, which limited the industrial application of NSA hydrogenation. In this work, we successfully synthesized Co@NC-B-800 catalyst with sustainable development concept by using cheap bamboo leaves as raw material. The characterizations demonstrated that Co nanoparticles (NPs) coated by N-doped carbon and Co-N x species were the main active site. The hydrogenation of sodium m -nitrobenzenesulfonate (SNS) was used as a probe reaction to test the catalytic performance. The Co@NC-B-800 catalyst possesses high activity with SNS conversion of 99.63 % and the m -aminobenzene sulfonic acid selectivity of 99.74 % within 3.5 h at 100 ℃, 4 MPa. Furthermore, the hydrogenation of a series of NSA substrates catalyzed by Co@NC-B-800 catalyst also shows excellent performance.
研究领域:
催化化学
·
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
ANALYTICAL CHEMISTRY
·
2025
·
IF 6.7
Jingyuan Guo,Ziyue Wang,Guo Wang,Yujia Liu,Shuang Liang,Bo Peng,Weifeng Huang,Zhengbo Chen
Herein, by the pyrolysis and alkali leaching of zeolitic imidazolate framework-8 (ZIF-8)@SiO2, followed by Fe and Co doping, a novel Fe1Co1/NC nanozyme, with adjacent Fe and Co dual-atom pairs decorated on an N-doped carbon support, is exactly built. Due to the synergistic effect of adjacent Fe and Co dual-atom pairs, the peroxidase-like activity of Fe1Co1/NC is significantly enhanced, far exceeding those of Fe1/NC and Co1/NC. Based on this, we propose a simple colorimetric electronic tongue consisting of Fe1Co1/NC, chromogenic substrates (3,3′,5,5′-tetramethylbenzidine) (TMB), 2,2′-azino-bis(3-ethylbenzothiazoline-6-sulfonic acid) (ABTS), and o-phenylenediamine (OPD) and H2O2 to identify seven active substances in licorice. The mechanism of action of this tongue is that different active substances have differential degrees of inhibition on the three nanozyme-catalyzed reactions (Fe1Co1/NC-TMB-H2O2, Fe1Co1/NC-ABTS-H2O2, and Fe1Co1/NC-OPD-H2O2). The collected absorbance variation data, i.e., the colorimetric fingerprint patterns, are analyzed by linear discriminant analysis, realizing the identification of the seven active substances with 100% accuracy. This work provides insights into the rational design of dual-atom catalysts with nanozyme activities for the discrimination of multiple targets.
研究领域:
生物化学
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分析化学
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2023
·
IF 6.2
Yilin Wang,Qiming Liu,Yirui Liu,LYU Shuying
SnS 2 is considered a potential anode material for sodium-ion batteries (SIBs) due to its high theoretical capacity, abundant resources and non-toxic properties. However, the low Na + diffusion kinetics and large volume expansion of SnS 2 hinder further development and application. Hence, the heterostructured MoS 2 /SnS 2 /NC nanospheres are synthetized through a facile hydrothermal reaction . By coating SnS 2 on MoS 2 templates, the heterojunction composite MoS 2 /SnS 2 /NC combines the advantages of the highly stable nanosphere structure of MoS 2 and the high theoretical capacity of SnS 2 . In conclusion, it delivers a high specific capacity of 603 mAh g −1 at 10 A g −1 after 2000 cycles and excellent rate performance of 750 mAh g −1 at 0.1 A g −1 . Furthermore, the full-battery of MoS 2 /SnS 2 /NC= |Na 3 V 2 (PO 4 ) 3 exhibits a great capacity of 69.8 mAh g −1 at 100 mA g −1 after 100 cycles. The excellent electrochemical performance of the heterojunction material proves it to be an extraordinary anode material for SIBs.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2024
·
IF 5.1
Jiasheng Fang,Zhenting Huang,Ming Chen,Shuo Zhao,Zhihui Liang,Qiongfang Zhuo,Yongfu Qiu
The utilization of natural clay minerals for synthesizing nano-sized metal-organic frameworks (MOFs) supported materials offers great advantages for rational design of innovative catalysts, which promotes the low-cost and large-scale environmental remediation applications. This work reported a facile and scalable encapsulation-pyrolysis strategy to prepare novel Au-HNTs@Co-NC core-shell catalyst for catalytic reduction of nitroaromatic pollutants. The HNTs were modified with aminosilane on the external surface for effectively anchoring well-dispersed and ultrasmall Au NPs. Uniform nano-sized ZIF-67 crystals controllably embraced the Au-HNTs via in-situ growth induced by electrostatic adsorption. The N 2 atmosphere pyrolysis at 550 °C resulted in Co NPs embedded into N-doped carbon substrates, and transformed ZIF-67 crystals into Co-NC layers for preferable encapsulation and stabilization of Au NPs. The as-prepared Au-HNTs@Co-NC-550 catalyst manifested splendid catalytic performance for p-nitrophenol reduction, and achieved the reaction rate constant and TOF value estimated as 2.025 min −1 and 49.25 min −1 , which significantly exceeded the behaviors of as-prepared control materials. Moreover, the catalyst also displayed excellent catalytic capability toward the reduction of nitroanilines and homologues and isomers of p-nitrophenol, indicative of its decent general applicability. After 8 cycles of reactions, the catalyst still retained brilliant reusability and structural stability with good magnetic property for expedient separation. The advantageous hollow core-shell structure combining HNTs and ZIF-67 derivatives enhanced the reactant diffusion and transfer. The N doping and electronegativity difference between Co and Au aroused higher electron uptake and facilitated electron transport during the reduction process. Meanwhile, the Co–H and Au–H bonds formed the strong synergistic effect for superior cooperative catalytic performance of the catalyst.
研究领域:
环境科学
·
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2024
·
IF 9.4
Wenpei Kang,Zhenkai Mou,Xuqiang Hu,Xiaoyu Fan,Daofeng Sun
Rational structure design is significant for the selenide anodes in the sodium/potassium ion batteries (SIBs/PIBs). Herein, dual engineering of hetero-interfaces and architecture is proposed to design SIB/PIB anodes. Attributed to the coordination binding with Mo 7 O 24 6- and VO 3 - , the polydopamine assembly is demonstrated as an ideal template to produce bimetallic selenide of MoSe 2 /VSe 1.6 anchoring on the in-situ N -doped carbon matrix (MoSe 2 /VSe 1.6 @NC). This ingenious hierarchical nanoflower structure can shorten the Na + /K + diffusion length, increase the electron conductivity and buffer the volume changes, which can promote Na + /K + reaction kinetics and stabilize the cycling performance. Consequently, the sodium/ potassium storage performance of MoSe 2 /VSe 1.6 @NC can be boosted. In SIBs, it achieves a capacity of 202 mAh/g at 10.0 A/g for 5000 cycles. Meanwhile, stable capacities of 207.1 mAh/g can be reached at 1.0 A/g over 1000 cycles in the PIBs. Furthermore, impressive capacities of 222.1 mAh/g and 100.4 mAh/g are delivered in the full cells of MoSe 2 /VSe 1.6 @NC//Na 3 V 2 (PO4) 3 @C and MoSe 2 /VSe 1.6 @NC//FePBA, respectively. This proves the potential practical application for the MoSe 2 /VSe 1.6 @NC anode in SIBs/PIBs.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
DALTON TRANSACTIONS
·
2023
·Vol. 52
·期 47
·17711-17716
·
IF 4
Xudun Shen,Liping Huang,Shuaishuai Li,Longnian Tang,Qiumei Lei,Bowang Zhao,Huilian Hao,Wenyao Li,Min Zeng,Guanjie He
We used sodium hydroxide-mediated approach and tannic acid etching to prepare hollow structured trimetallic MOF-derived CoFeNi/Z-P NC nanocomposites. Remarkably, the resulting CoFeNi/Z-P NC nanocomposites have large specific surface area and mesoporous structure, making their active sites more accessible and mass transfer more effective. More complex trimetallic components provide greater possibilities for further improving electrocatalytic performance. The CoFeNi/Z-P NC nanocomposites demonstrate notable enhancements for the OER, and 10 mA cm−2 current density is achieved at a low overpotential of 244 mV, with a low Tafel slope of 66.2 mV dec−1 and have good stability in alkaline solutions. In addition, as a cathode material for overall alkaline water splitting, CoFeNi/Z-P NC is better than RuO2 with longer cycling stability.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2022
·
IF 24.319
Manfen Liang,Yu Liu,Jie Zhang,Fangyuan Wang,Zhichao Miao,Lechen Diao,Jinglin Mu,Jin Zhou,Shuping Zhuo
The electrochemical CO 2 reduction reaction (CO 2 RR) that transforms CO 2 to CO has attracted great interest. Transition metal nanoparticles encapsulated in nitrogen-doped carbon (M@NC) catalysts exhibit outstanding catalytic performance. However, the role of metal and N species in M@NC catalysts remains unclear. In this work, Co@C, Co@NC, Ni@C, and Ni@NC catalysts were achieved and employed in CO 2 RR. The Ni@NC catalyst exhibits an industry level current density of 220 mA cm −2 and a high Faradaic efficiency of 98% for CO production at − 0.87 V vs. RHE for 100 h. In addition, the N species, especially the pyrrolic-N in the shell of Ni@NC material provide active sites for adsorbing and activating CO 2 molecules, and metal nanoparticles improve the electronic structure of N species, thereby decreasing their ability for radical attack (*COOH, *CO, and *H). Consequently, this work can guide the design of M@NC catalyst for CO 2 RR to CO.
研究领域:
材料科学
·
电化学
·
催化反应
✓ 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）