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Fabrication of Fe Nanoparticles into N-doped Mesoporous carbon Nanotube Derived from Rice-Like Fe/N-MOF and Its ORR Catalytic Performance for MFC

中国化学会第十九届全国催化学术会议

作者： Weilin Xu State key laboratory of Electroanalytical Chemistry &Jilin Province Key Laboratory of Low Carbon Chemical PowerChangchun Institute of Applied ChemistryChinese Academy of Sciences

To develop an effective functional materials or devices for energy process, firstly, we need a comprehensive understanding to the basic energy process. To this goal, we are doing research related to energy in two different ways. One is the basic research based on single-molecule fluorescence microscopy to understand the nanocatalysis or pure chemical reactions at single-molecule single-particle level .

关键词： Single-molecule catalysis Single-atom catalyst CO2RR ORR

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China Petroleum Processing & Petrochemical Technology 2021年第2期23卷 98-108页

作者： Lu Decheng Wang Wenyi Chang Jiacheng Wang Xueqin Wang Yuanyuan Song Hua provincial key laboratory of Oil&Gas chemical Technology College of Chemistry&Chemical EngineeringNortheast Petroleum UniversityDaqing 163318

The development of non-noble metal oxidation reduction catalysts(ORR)to improve microbial fuel cell(MFC)performance remains extremely ***,the nitrogen-doped iron-based porous carbon nanotube Fe/N@MC-T ORR catalysts were derived from Fe/N-MOF by pyrolyzation using acetonitrile as the nitrogen precursor in a low-cost organic *** Fe/N@MC-T catalysts under different pyrolysis temperatures were characterized by SEM,TEM,BET,XRD,and XPS ***/N-MOF showed a smooth rice-like structure with a particle size of about 400×50 nm^(2).The Fe species in Fe/N@MC-T mainly exists in the form of zero-valent iron with a small amount of *** results of electrochemical tests revealed that the onset and half-wave potentials of Fe/N@MC-700 were 0.89 V and 0.80 V,respectively,which were only slightly lower than those of the commercial Pt/C(0.92 V and 0.82 V).The MFC with Fe/N@MC-700 showed a highest power density of 864.1 mW/m^(2),which was about 2.25 times that of MFC with carbon cloth,and was slightly lower than that of MFC with Pt/C(20%)(1002.0 mW/m^(2)),which demonstrated that the Fe particles wrapped in carbon nanotubes possessed a relatively high ORR activity.

关键词： microbial fuel cells metal organic framework nitrogen doping oxidation reduction reaction Fe/N@MC-T catalyst

Isolated Co Atoms Anchored on Defective Nitrogen-doped carbon Graphene as Efficient Oxygen Reduction Reaction Electrocatalysts

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Energy & Environmental Materials 2023年第3期6卷 144-149页

作者： Peng Rao Junming Luo Daoxiong Wu Jing Li Qi Chen Peilin Deng Yijun Shen Xinlong Tian State key laboratory of Marine Resource Utilization in South China Sea Hainan Provincial Key Lab of Fine ChemistrySchool of Chemical Engineering and TechnologyHainan UniversityHaikou 570228China

Oxygen reduction reaction(ORR)is the heart of many new energy conversions and storage devices,such as metal-air batteries and fuel ***,ORR is currently facing the dilemma of sluggish intrinsic kinetics and the noble electrocatalysts of high price and low *** this work,isolated Co atoms anchored on defective nitrogen-doped carbon graphene single-atom catalyst(Co-SAC/NC)are synthesized via the proposed movable type printing *** prepared Co-SAC/NC catalyst demonstrates admirable ORR performance,with a high half-wave potential of 0.884 V in alkaline electrolytes and outstanding *** addition,an assembled zinc–air battery with prepared Co-SAC/NC as air-cathode catalyst displays a high-peak power density of 179 mW cm^(-2)and a high-specific capacity(757 mAh g^(-1)).Density functional theory calculations confirm that the true active sites of the prepared catalyst are Co-N_(4)moieties,and further reveal a significantly electronic structure evolution of Co sites in the ORR process,in which the project density of states and local magnetic moment of Co atom varies during its whole reaction *** work not only paves a new avenue for synthesizing SACs as robust electrocatalysts,but also provides an electronic-level insight into the evolution of the electronic structure of single-atom catalysts.

关键词： movable type printing method oxygen reduction reaction single-atom catalyst zinc-air battery

Outer delocalized electron aggregation of bromide bridged core–shell CuBr@C for hydrogen evolution reaction

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Nano Research 2023年第5期16卷 6608-6614页

作者： Tianyi Xu Ruoyu Li Lei Zhang Dongxu Jiao Yilong Dong Ming Gong Dantong Zhang Jinchang Fan Dewen Wang Yanhua Liu Xiao Zhao Wei Zhang Weitao Zheng Xiaoqiang Cui State key laboratory of Automotive Simulation and Control School of Materials Science and EngineeringKey Laboratory of Automobile Materials of MOEJilin Provincial International Cooperation Key Laboratory of High-Efficiency Clean Energy MaterialsElectron Microscopy CenterJilin UniversityChangchun 130012China College of Chemistry Jilin UniversityChangchun 130012China Center of Multiscale Crystal Materials Research Institute of Advanced Materials Science and EngineeringShenzhen Intitute of Advanced TechnologyChinese Academy of ScienceShenzhen 518055China

Modulation of the surface electron distribution is a challenging problem that determines the adsorption ability of catalytic ***,we address this challenge by bridging the inner and outer layers of the core–shell structure through the bridge Br *** shell wrapped copper bromide nanorods(CuBr@C)are constructed for the first time by chemical vapour deposition with hexabromobenzene(HBB).HBB pyrolysis provides both bridge Br atom and C *** C shell protects the stability of the internal halide structure,while the bridge Br atom triggers the rearrangement of the surface electrons and exhibits excellent electrocatalytic ***,the hydrogen evolution reaction(HER)activity of CuBr@C is significantly better than that of commercial N-doped carbon nanotubes,surpassing commercial Pt/C at over 200 mA·cm^(−2).Density functional theory(DFT)calculations reveal that bridge Br atoms inspire aggregation of delocalized electrons on C-shell surfaces,leading to optimization of hydrogen adsorption energy.

关键词： bridge Br atoms delocalized electron aggregation core–shell nanorods C-shell wrapped CuBr hydrogen evolution reaction

Thin buffer layer assist carbon-modifying separator for long-life lithium metal anodes

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Journal of Energy Chemistry 2021年第6期30卷 61-68,I0003页

作者： Jiaqi Li Hongsheng Jia Haibo Li Xing Zhao Guiru Sun Zhiyong Chang Lei Li Ming Jin Zhao Wang Ming Feng key laboratory of Functional Materials Physics and Chemistry of the Ministry of Education Jilin Normal UniversityChangchun 130103JilinChina key laboratory of Bionic Engineering Ministry of EducationJilin UniversityChangchun 130022JilinChina College of Biological and Agricultural Engineering Jilin UniversityChangchun 130022JilinChina Aircraft System Teaching and Research Section Air Force Aviation UniversityChangchun 130022JilinChina

The guided Li dendrite growth by carbon-modifying separator is believed to be an effective strategy for enhancing life of lithium metal batteries(LMBs).However,the weak adhesions,as well as the large interface impedance between the smooth separator and the carbon functional layer(CFL) lead to an easily peeling of the CFL after repetitive ***,we propose a promising solution by an inserting thin buffer layer(TBL) to strengthen the adhesion between CFL and separator as a double modifying layer(C-TBL) of the LMBs separator,which greatly improves the stability of the CFL and provides an effective Li metal anode *** to the sufficient ionic conductivity,chemical stability and strong adhesion to the separator of the TBL,it can avoid the failure of the CFL functionality with small interface ***,the CFL effectively reduces localized flux of Li+ through its abundant *** Li/Li cell with C-TBL separator displays the Li dendrite-free and stable cycling performance for at least 1500 *** LiFePO_(4)(LFP) is employed as the cathode electrode,the assembled full cell with C-TBL separator shows the excellent rate performance and outstanding cycling *** study builds a stable Li+conducting "bridge" between the functional layer and the separator in stabilizing Li metal anode,and provides a fresh idea of the artificial separator of LMBs.

关键词： Dendrite-free metal anodes Lithium metal protection Separator Lithium-metal rechargeable battery Lithium fluoride

Cu/Cu_(2)O nanoparticles co-regulated carbon catalyst for alkaline Al-air batteries

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Chinese chemical Letters 2021年第8期32卷 2427-2432页

作者： Jing Tian Depei Liu Jingsha Li Dan Sun Hongtao Liu Haiyan Wang Yougen Tang Hunan provincial key laboratory of chemical power Sources College of Chemistry and Chemical EngineeringCentral South UniversityChangsha 410083China Eco-materials and Renewable Energy Research Center(ERERC) National Laboratory of Solid State MicrostructuresCollaborative Innovation Center of Advanced MicrostructuresSchool of PhysicsNanjing UniversityNanjing 210093China Institute of Materials Science and Devices Suzhou University of Science and TechnologySuzhou 215011China key laboratory of Preparation and Application of Environmental Friendly Materials of Ministry of Education Jilin Normal UniversityChangchun 130103

Developing high-efficiency,inexpensive,and steady non-precious metal oxygen reduction reaction(ORR) catalysts to displace Pt-based catalysts is significant for commercial applications of Al-air ***,we have prepared the Cu/Cu_(2)O-NC catalyst with excellent ORR performance and high stability,due to the synergistic effect of Cu and Cu_(2)O *** half-wave potential(0.8 V) and the limiting-current density(5.20 mA/cm^(2)) of the Cu/Cu_(2)O-NC are very close to those of the 20% Pt/C catalyst(0.82 V,5.10 mA/cm^(2)).Besides,it exhibits excellent performance with a maximal power density of 250 mW/cm^(2) and a stable continuous discharge for more than 90 h in the Al-air battery test The promoting effects of Cu_(2)O towards Cu-based ORR catalysts are illustrated as follows:(ⅰ) Cu_(2)O is the major ORR active site by the redox of Cu(Ⅱ)/Cu(Ⅰ),which provides excellent ORR activities;(ⅱ) Cu can stabilize the location of Cu_(2)O by assisting the electron transfer to Cu(Ⅱ)/Cu(Ⅰ) redox,which is conducive to the high stability of the *** work provides a useful strategy for enhancing the ORR performance of Cu-based catalysts.

关键词： Cu/Cu_(2)O Oxygen reduction reaction Al-air battery Stability Synergistic effect

Graphitic carbon nitride based single-atom photocatalysts

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Frontiers of physics 2020年第3期15卷 13-26,M0001页

作者： Junwei Fu Shuandi Wang Zihua Wang Kang Liu Huangjingwei Li Hui Liu Junhua Hu Xiaowen Xu Hongmei Li Min Liu School of Physics and Electronics State Key Laboratory of Powder MetallurgyHunan Provincial Key Laboratory of Chemical Power SourcesCentral South UniversityChangsha410083China School of Metallurgy and Environment Central South UniversityChangsha410083China School of Materials Science and Engineering Zhengzhou UniversityZhengzhou450002China

Single-atom photocatalysts,due to their high catalysis activity,selectivity and stability,become a hotspot in the field of *** carbon nitride(g-C3N4)is known as both a good support for single atoms and a star *** g-C3N4-based single-atom photocatalysts exhibits great potential in improving the photocatalytic *** this review,we summarize the recent progress in g-C3N4-based single-atom photocatalysts,mainly including preparation strategies,characterizations,and their photocatalytic *** significant roles of single atoms and catalysis mechanism in g-C3N4-based single-atom photocatalysts are *** last,the challenges and perspectives for exploring high-efficient g-C3N4-based single-atom photocatalysts are presented.

关键词： graphitic carbon nitride single atoms atomically dispersed sites site-isolated catalysts photocatalysis

Retention of trace elements in coal-fired flue gas by a novel heterogeneous agglomeration technology

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Journal of Environmental Sciences 2023年第3期125卷 234-243页

作者： Yushan Ji Xiangzheng Cui Jingchao Liu Tianle Zhang Shuzhou Wei Junfeng Zhang Yongchun Zhao Junying Zhang State key laboratory of Coal Combustion School of Energy and Power EngineeringHuazhong University of Science and TechnologyWuhan 430074China National Environmental Protection Engineering Technology Center for Trace Elements Pollution Control and low carbon Utilization of Coal Wuhan 430074China Sanhe power Generation Co.Ltd Sanhe 065201China Hebei Coal-fired power Station Pollution Control Technology Innovation Center Sanhe 065201China

Heterogeneous agglomeration (HA) is a very potential technology for coal-fired flue gas *** this paper,the distribution and migration mechanisms of trace elements (TEs such as Se,As and Pb in CFPPs were studied on a 30,000 m^(3)/hr pilot-scale experimental plat *** influences of HA on the removal efficiency of gaseous and particulate TEs were well *** results showed that Se,As and Pb were enriched in fly ash,and their sen sitivity to particle size is quite *** content of Se was the highest in PM1,reaching193.04 mg/kg at the electrostatic precipitator (ESP) *** average particle size of the total dust before ESP increased significantly from 21.686 to 62.612μm after injecting the heterogeneous agglomeration adsorbent,conducive to its further removal by *** addi tion,the concentrations of gaseous Se,As and Pb in the flue gas decreased after adsorben spray,and accordingly,their contents in the hierarchical particles increased,indicating tha the adsorbent could effectively promote the adsorption of gaseous trace elements in fly ash and reduce the possibility of their escape to the *** concentrations of Se,As and Pb emitted by wet flue gas desulfurization (WFGD) are 0.223,0.668 and 0.076μg/m^(3)which decreased by 59.98%,47.69%and 90.71%,***,a possible HA mecha nism model was proposed,where chemical adsorption,physical condensation and collision agglomeration of gaseous TEs and fine particles with adsorbent droplets occurred to form larger agglomerates.

关键词： Heterogeneous agglomeration Hazardous trace elements Particulate matter Flue gas Pilot experiments

Room-temperature liquid metal synthesis of nanoporous copper-indium heterostructures for efficient carbon dioxide reduction to syngas

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Science China Materials 2022年第12期65卷 3504-3512页

作者： Xingcheng Ma Feng Wang Dongxu Jiao Dantong Zhang Xiao Zhao David JSingh Jingxiang Zhao Xiaoqiang Cui Weitao Zheng State key laboratory of Automotive Simulation and Control School of Materials Science and EngineeringKey Laboratory of Automobile Materials of MOEJilin UniversityChangchun 130012China key laboratory of Photonic and Electronic Bandgap Materials Ministry of Educationand College of Chemistry and Chemical EngineeringHarbin Normal UniversityHarbin 150025China Department of Physics and Astronomy and Department of Chemistry University of MissouriColumbiaMissouri 65211United States Guangdong provincial key laboratory of Functional Oxide Materials and Devices Southern University of Science and TechnologyShenzhen 518055China

Nanoporous metals show promising performances in electrochemical *** this paper,we report a self-supporting bimetallic porous heterogeneous indium/copper structure synthesized with a eutectic gallium-indium(EGaIn)material on a copper *** nanoporous copper-indium heterostructure catalyst exhibits excellent performance in the reduction of carbon dioxide to *** ratio of H_(2)/CO is tunable from 0.47 to 2.0 by changing working *** catalyst is highly stable,showing 96%maintenance of the current density after a 70-h continuous *** functional theory calculations reveal that the indium/copper interface induces charge redistribution within the copper surface,leading to the formation of two distinct active sites,namely,Cu^(δ)and Cu0,and enabling a high-performance generation of CO and H_(2).This work provides a new strategy for obtaining self-supporting nanoporous metal electrode catalysts.

关键词： syngas liquid metal EGaIn heterostructure nanoporous metal