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Efficient electrocatalytic urea synthesis from CO_(2)and nitrate over the scale-up produced feni alloy-decorated nanoporous carbon

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Chinese Journal of Catalysis 2024年第10期65卷 153-162页

作者： Zuo-Shu Sun Xue-Yan Xiang Qiu-Ping Zhao Zhao Tang Shi-Yi Jiang Tong-Bu Lu Zhi-Ming Zhang Baifan Wang Hua-Qing Yin Institute for New Energy Materials and Low Carbon Technologies School of Materials Science&EngineeringTianjin University of TechnologyTianjin 300384China State Key Laboratory of Elemento-Organic Chemistry College of ChemistryNankai UniversityTianjin 300071China

Electrocatalytic urea synthesis provides a favorable strategy for conventional energy-consuming urea synthesis,but achieving large-scale catalyst synthesis with high catalytic efficiency remains ***,we developed a simple method for the preparation of a series of feni-alloy-based catalysts,named feni@nC-T(n represents the content of nanoporous carbon as 1,3,5,7 or 9 g and T=900,950,1000 or 1100°C),for highly performed urea synthesis via NO_(3)−and CO_(2)*** feni@7C-1000 achieved a high urea yield of 1041.33 mmol h^(−1)gfeni^(−1)with a Faradaic efficiency of 15.56%at–1.2 V ***,the scale-up synthesized feni@7C-950-S(over 140 g per batch)was achieved with its high catalytic performance and high stability *** investigation illuminated that the Ni and Fe sites catalyze and stabilize the key*CO and*N intermediates and minimize the C–N coupling reaction barriers for highly efficient urea synthesis.

关键词： Urea synthesis Electrocatalysis feni alloy Scale-up synthesis C-N coupling

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Regulation of impedance matching feature and electronic structure of nitrogen-doped carbon nanotubes for high-performance electromagnetic wave absorption

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Journal of Materials Science & Technology 2022年第13期108卷 1-9页

作者： Fenghui Cao Jia Xu Minjie Liu Feng Yan Qiuyun Ouyang Xitian Zhang Xiaoli Zhang Yujin Chen Key Laboratory of In-Fiber Integrated Optics College of Physics and Optoelectronic EngineeringHarbin Engineering UniversityHarbin 150001China School of Mechatronic Engineering Daqing Normal UniversityDaqing 163712China Key Laboratory for Photonic and Electronic Bandgap Materials Ministry of Educationand School of Physics and Electronic EngineeringHarbin Normal UniversityHarbin 150025China School of Materials Science and Engineering Zhengzhou UniversityZhengzhou 450001China

In this study,we developed a facile method to fabricate three-dimensional(3D)structures composed of feni alloy nanoparticles encapsulated in N-doped carbon nanotubes that grafted on the SiO_(2) spheres(Fe_(x)Ni_(y)@NCNT@SiO_(2))for electromagnetic wave(EMW)*** experimental results suggest that the impedance matching characteristic can be tuned by the introduction of SiO_(2) spheres in the 3D *** functional theory(DFT)calculations showed that the introduction of Ni improved the polarization and conductive losses of the Fe_(x)Ni_(y)@NCNT@SiO_(2).As a result,the optimal 3D structure exhibits excellent EMW absorption property with a reflection loss and effective absorption bandwidth are-49.39 dB and 4.32 GHz,respectively,even though the matching thickness is only 1.6 mm,superior to most magnetic carbon-based ***,our current approach opens up an effective way to the development of low-cost,high-performance EMW absorbers.

关键词： feni alloy CNTs Silica Nitrogen doping Electromagnetic wave absorption

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Facile synthesis of feni nanoparticle-loaded carbon nanocomposite fibers for enhanced microwave absorption performance

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Journal of Materials Science & Technology 2024年第8期175卷 141-152页

作者： Jinhu Hu Zhengguo Jiao Xukang Han Jiao Liu Mingliang Ma Jialin Jiang Yongbo Hou Xingyue Wang Chao Feng Yong Ma School of Civil Engineering Qingdao University of TechnologyQingdao 266520China School of Material Science and Engineering Shandong University of Science and TechnologyQingdao 266590China

The advantages of Fe,Ni metals and one-dimensional(1D)carbon materials are combined in this study using a simple method to prepare feni/C nanofibers for electromagnetic microwave(EM)*** prepared feni/C nanofibers exhibit excellent EM absorption performance under dielectric/magnetic synergistic *** a frequency of 13.3 GHz,the minimum reflection loss(RLmin)reaches-57.15 dB,and effective absorption bandwidth(EAB)is as high as 4.0 GHz(12.5-16.5 GHz),with a thickness and filling rate of only 1.6 mm and 30 wt.%,*** shows that the EM absorption performance of feni/C nanofibers far exceeds that of single-component nanofibers and pure carbon fibers,and the excellent EM absorption performance is due to its unique microstructure and excellent electromagnetic *** feni alloy loaded on carbon nanofibers forms rich heterogeneous interfaces,and the three-dimensional(3D)conductive network composed of 1D carbon fibers increases the migration path of *** addition,feni alloy,as an impedance regulation factor,strengthens the dielectricity of the carbon matrix while providing multidimensional magnetism,achieving impedance *** work is thought to contribute to the promotion of emerging absorbers by providing a novel strategy for the development of new 1D magnetic carbon-based high-performance EM absorbing materials.

关键词： feni alloy Carbon nanofiber Electrospinning Microwave absorption

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feni doped porous carbon as an efficient catalyst for oxygen evolution reaction

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Frontiers of Chemical Science and Engineering 2021年第2期15卷 279-287页

作者： Jun-Wei Zhang Hang Zhang Tie-Zhen Ren Zhong-Yong Yuan Teresa JBandosz Hebei Provincial Key Laboratory of Green Chemical Technology&High Efficient Energy Saving School of Chemical Engineering and TechnologyHebei University of TechnologyTianjin 300130China Key Laboratory of Advanced Energy Materials Chemistry(Ministry of Education) School of Materials Science and EngineeringNankai UniversityTianjin 300350China Department of Chemistry and Biochemistry The City College of New YorkNew YorkNY 10031USA

Polymer-derived porous carbon was used as a support of iron and nickel species with an objective to obtain an efficient oxygen reduction reaction(OER)*** surface features were extensively characterized using X-ray diffraction,X-ray photoelectron spectroscopy and high-resolution transmission electron *** feni-modified carbon the overpotential for OER was very low(280 mV)and comparable to that on noble metal catalyst IrO_(2).The electrochemical properties have been investigated to reveal the difference between the binary alloy-and single metal-doped *** work demonstrates a significant step for the development of low-cost,environmentally-friendly and highly-efficient OER catalysts.

关键词： OER polystyrene salt porous carbon feni alloy p/n junction

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Leather waste as precursor to prepare bifunctional catalyst for alkaline and neutral zinc-air batteries

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Chinese Chemical Letters 2023年第6期34卷 594-597页

作者： Zeyu Zhu Jing Zhu Yangshen Chen Xinxin Liu Mengchun Zhang Mengxiao Yang Mengyu Liu Jiansheng Wu Sheng Li Fengwei Huo Key Laboratory of Flexible Electronics(KLOFE) Institute of Advanced Materials(IAM)Nanjing Tech UniversityNanjing 211816China School of Chemistry and Molecular Engineering Nanjing Tech UniversityNanjing 211816China

Carbon materials derived from biomass waste are considered as potential electrocatalysts for applications in zinc-air batteries(ZABs)due to their low cost and good catalytic ***,we reported the preparation of gel-based catalysts through utilizing hydrolyzed waste leather powder cross-linked with metallic salt *** calcination,iron-nickel alloy anchored in nitrogen-doped porous carbon catalysts(Fe Ni@NDC)was *** with commercial Pt/C catalyst,Fe Ni@NDC-800 exhibited lower E_(1/2)(0.77 V)and better *** importantly,the resulting Fe Ni@NDC-800-based alkaline ZABs achieved power density of 93.01 m W/cm^(2) and open circuit voltage of 1.45 V,which the Fe Ni@NDC-800-based neutral ZAB displayed a charge/discharge cycle stability of 275 *** work opens up the possibility of rational design and preparation of low-cost and high-performance electrocatalysts from recyclable leather waste.

关键词： Leather waste Zinc-air batteries Bifunctional electrocatalyst feni alloy Biomass

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