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Electrochemical reduction of CO_2 to CO using graphene oxide/carbon nanotube electrode in ionic liquid/acetonitrile system

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Science China Chemistry 2016年第5期59卷 551-556页

作者： qinggong zhu Jun Ma Xinchen Kang Xiaofu Sun Jiayin Hu Guanying Yang Buxing Han Beijing National Laboratory for Molecular Sciences CAS Key Laboratory of Colloid Interface and Chemical Thermodynamics Institute of Chemistry Chinese Academy of Sciences

Electrochemical reduction of CO_2 to CO is an interesting topic. In this work, we prepared metal-free electrodes by depositing graphene oxide(GO), multi-walled carbon nanotube(MWCNT), and GO/MWCNT composites on carbon paper(CP) using electrophoretic deposition(EPD) method. The electrodes were characterized by different methods, such as X-ray diffraction(XRD) and X-ray photoelectron spectroscopy(XPS). The electrochemical reduction of CO_2 to CO was conducted on the electrodes in 1-butyl-3-methylimidazolium tetrafluoroborate([Bmim]BF4)/acetonitrile(Me CN) electrolyte, and the composition of the electrolyte influenced the reaction significantly. It was demonstrated that GO/MWCNT-CP electrode was very effective for the reaction in IL(90 wt%)/Me CN binary mixture, the Faradaic efficiency of CO and current density were even higher than those on Au and Ag electrodes in the same electrolyte.

关键词： carbon dioxide electrochemical reduction carbon monoxide electrophoretic deposition carbon based materials

Selective electroreduction of carbon dioxide to formic acid on electrodeposited SnO_2@N-doped porous carbon catalysts

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Science China Chemistry 2018年第2期61卷 228-235页

作者： Lu Lu Xiaofu Sun Jun Ma qinggong zhu Congyi Wu Dexin Yang Buxing Han Beijing National Laboratory for Molecular Sciences CAS Key Laboratory of Colloid and Interface and Thermodynamics CAS Research/Education Center for Excellence in Molecular Sciences Institute of Chemistry Chinese Academy of Sciences School of Chemistry and Chemical Engineering University of Chinese Academy of Sciences

Electrocatalytic reduction of CO_2 is a promising route for energy storage and utilization. Herein we synthesized SnO_2 nanosheets and supported them on N-doped porous carbon (N-PC) by electrodeposition for the first time. The SnO_2 and N-PC in the SnO_2@N-PC composites had exellent synergistic effect for electrocatalytic reduction of CO_2 to HCOOH. The Faradaic efficiency of HCOOH could be as high as 94.1% with a current density of 28.4 mA cm-2 in ionic liquid-MeCN system. The reaction mechanism was proposed on the basis of some control experiments. This work opens a new way to prepare composite electrode for electrochemical reduction of CO_2.

关键词： CO2 reduction electrocatalyst ionic liquid porous carbon green chemistry

Sm and S Co-doping to Construct Homo-hetero Cu Catalysts for Synergistic Enhancing CO_(2) Electroreduction

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Chinese Journal of Chemistry 2023年第12期41卷 1443-1449页

作者： Jiyuan Liu Pengsong Li Jiahui Bi Yong Wang qinggong zhu Xiaofu Sun Jianling Zhang Zhimin Liu Buxing Han Beijing National Laboratory for Molecular Sciences CAS Laboratory of Colloid and Interface and Thermodynamics CAS Research/Education Center for Excellence in Molecular Sciences Institute of Chemistry Chinese Academy of Sciences Beijing 100190 China School of Chemical Science University of Chinese Academy of Sciences Beijing 100049 China Shanghai Key Laboratory of Green Chemistry and Chemical Processes School of Chemistry and Molecular Engineering East China Normal University Shanghai 200062 China

Copper(Cu)is recognized as one of the most efficient metal catalysts that can perform the electrocatalytic CO_(2) reduction reaction(CO_(2)RR)and its surface oxidation state determines the reaction *** Cuδ+(0<δ<1)species,are well known active sites in CO_(2)RR to produce hydrocarbons and ***,Cuδ+active sites are difficult to control,and it is very easy to be reduced to Cu^(0) under CO_(2)RR operating ***,we report a homo-hetero doping strategy to construct an efficient samarium(Sm)and sulfur(S)co-doping catalyst(Smx-CuSy)for CO_(2)RR to formic acid(HCOOH).At optimum conditions,Smx-CuSy delivered a high HCOOH Faradaic efficiency(FE)of 92.1%at the current density of 300 mA·cm^(–2) using 1 mol/L KOH aqueous solution as electrolyte,and the reduction potential was as low as–0.52 V *** hydrogen electrode(RHE).The co-doping of Sm and S resulted in excellent CO_(2)RR performance owing to the synergistic effect of the homo-hetero *** homo-doping of S could effectively adjust the electronic structure of Cu in favor of the formation of abundant Cu^(δ+)*** existence of hetero-Sm species could not only stabilize the Cu^(δ+)sites,but also increase the concentration of H ions to form a favorable catalytic environment for HCOOH generation.

关键词： Carbon dioxide Electrochemistry Lanthanides Homo-hetero doping Copper

Study on Real Road Driving Emission Characteristics of Light-duty Gasoline Vehicles

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Study on Real Road Driving Emission Characteristics of Light...

Tuning the Surface Field by Embedding Cations into Metals to Direct the Reaction Pathway of CO_(2) Electroreduction

2019中国汽车工程学会年会

作者： zhu qinggong Guo Dongdong Shi Fulu Yang Zhengjun Luo Jiaxin China Automotive Technology and Research Center Beijing Vehicle Emission Management Center

In November 2018,the real driving emissions(RDE) package 4 of European Commission regulation was released,and the RDE test method was improved,the data processing method and cold start data processing were different from the China 6 lightduty vehicle *** some congested cities of China,the average speed of vehicles during morning and evening rush hours is lower than that in the RDE urban *** order to evaluate the impact of data processing methods,cold starting data processing and congestion conditions on RDE test,the real driving emissions from 5 light-duty GDI gasoline vehicles were measured on the GB6 RDE test route and the typical urban test route *** was found that CO、NO and PN specific emissions based on EU package 4 data processing methods were 22%,46% and 29% higher than the moving average window method results of *** the CO,NO and PN emissions,the reserved cold starting test results of 5 test vehicles are 18%,42% and 15% higher than the results excluding cold starting *** the vehicle A,CO and PN emissions under the typical urban road are greater than GB6 RDE road test emissions,as NO and THC emissions are roughly the *** CO,THC and PN emission results increased in congested road conditions,which were2.8 times,2.9 times and 3.5 times higher than those in the condition of smooth *** of CO,THC and CO along the two test journeys show a decreasing trend with the increase of average speed,as PN emissions show an increasing trend with the increase of average positive acceleration of the *** emission decreases with the increase of average positive acceleration of the travel.

关键词： real driving emission typical urban road cold start emissions congested traffic emissions data processing methods

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CCS Chemistry 2024年第3期6卷 631-640页

作者： Pei Zhang Meng Zhou Shiqiang Liu Xueqing Xing Jiahao Yang Peng Chen Yaoyu Yin Yingying Cheng Xing Tong Jun Ma qinggong zhu Xiaofu Sun ZhongJun Chen Xinchen Kang Buxing Han Beijing National Laboratory for Molecular Sciences CAS Laboratory of Colloid and Interface and ThermodynamicsCAS Research/Education Center for Excellence in Molecular SciencesCenter for Carbon Neutral ChemistryInstitute of ChemistryChinese Academy of SciencesBeijing 100190 Beijing Synchrotron Radiation Facility Institute of High Energy PhysicsChinese Academy of SciencesBeijing 100049 Shanghai Key Laboratory of Green Chemistry and Chemical Processes School of Chemistry and Molecular EngineeringEast China Normal UniversityShanghai 200062 School of Chemistry University of Chinese Academy of SciencesBeijing 100049

The creation of universal strategies to affect the reaction route of the electroreduction of CO_(2) is ***,we report the first work to introduce cations into diverse metals such as Cu,Bi,In,and Sn via the electroreduction of related metallic oxides in quaternary ammonium surfactant *** to their physical adsorption,cations embedded into the electrodes have a more pronounced impact on the electrical field,which effectively influences the adsorption state of *** the increase of surface field,the hydrogen evolution reaction and*COOH route are significantly reduced,favouring the*OCHO pathway *** a result,hydrogen,CO,and C_(2+)products almost completely vanish at−0.5 V versus RHE in 0.1 M Na_(2)SO_(4)in an H-type cell after enough cations are embedded into the Cu electrode,and the faradaic efficiency of formate rises from 18.0%to 99.5%simultaneously.

关键词： CO_(2)electroreduction tuneable products electrical field reaction pathway cations embedding

轻型汽车实际道路行驶与实验室工况污染物排放对比研究

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汽车工程 2017年第10期39卷 1125-1129,1135页

作者：朱庆功杨正军温溢周猛中国汽车技术研究中心天津300300

选择6辆满足国Ⅳ、国Ⅴ排放标准的轻型汽油车和柴油车进行了在WLTC和NEDC循环工况下的试验室排放试验,并对其中的4辆车按照RDE测试规程进行了实际道路排放测试。结果表明:在实际道路行驶条件下,汽油车CO和柴油车NO_x排放严重超过标准限... 详细信息

选择6辆满足国Ⅳ、国Ⅴ排放标准的轻型汽油车和柴油车进行了在WLTC和NEDC循环工况下的试验室排放试验,并对其中的4辆车按照RDE测试规程进行了实际道路排放测试。结果表明:在实际道路行驶条件下,汽油车CO和柴油车NO_x排放严重超过标准限值,高排放主要出现在车速大于60km/h的郊区和高速公路段,瞬时排放量会随着车速和加速度的升高而增大;部分汽油车在WLTC工况的超高速段中出现了很高的CO排放,而WLTC工况THC的排放则小于NEDC工况;4辆汽油车在NEDC工况和WLTC工况下PN排放都超过标准限值,而柴油车的PN排放和所有车辆的PM排放都小于标准限值。建议国Ⅵ车型开发时应重点关注汽油车的CO,PN排放以及柴油车的NO_x排放。

关键词：实际道路排放 WLTC工况 NEDC工况排放特性排放标准

Efficient electrocatalytic reduction of carbon dioxide to ethylene on copper–antimony bimetallic alloy catalyst

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Chinese Journal of Catalysis 2020年第7期41卷 1091-1098页

作者： Shuaiqiang Jia qinggong zhu Haihong Wu Meng’en Chu Shitao Han Ruting Feng Jinghui Tu Jianxin Zhai Buxing Han Shanghai Key Laboratory of Green Chemistry and Chemical Processes School of Chemistry and Molecular EngineeringEast China Normal UniversityShanghai 200062China Beijing National Laboratory for Molecular Sciences CAS Key Laboratory of Colloid and Interface and ThermodynamicsCAS Research/Education Center for Excellence in Molecular SciencesInstitute of ChemistryChinese Academy of SciencesBeijing 100190China

The exploration of efficient electrocatalysts for the reduction of CO2 to C2H4 is of significant importance but is also a challenging ***-based bimetallic catalysts are extremely promising for efficient CO2 *** this work,we synthesize a series of porous bimetallic Cu–Sb alloys with different compositions for the catalytic reduction of CO2 to *** is demonstrated that the alloy catalysts are much more efficient than the pure Cu *** performance of the alloy catalysts depended strongly on the ***,the alloy with a Cu:Sb ratio of 10:1 yielded the best results;it exhibited a high C2H4 Faradaic efficiency of 49.7%and a high current density of 28.5 mA cm?2 at?1.19 V vs.a reversible hydrogen electrode(RHE)in 0.1 M KCl *** the best of our knowledge,the electrocatalytic reduction of CO2 to C2H4 using Cu–Sb alloys as catalysts has not been *** excellent performance of the porous alloy catalyst is attributed to its favorable electronic configuration,large surface area,high CO2 adsorption rate,and fast charge transfer rate.

关键词： Carbon dioxide reduction Ethyene Electrocatalyst Copper-antimony bimetallic alloy Synergistic effect

基于WLTC和NEDC循环的轻型车氨排放特性研究

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汽车工程 2019年第5期41卷 493-498页

作者：罗佳鑫崔健超谭建伟杨正军朱庆功中国汽车技术研究中心天津300300 一汽丰田技术开发有限公司天津300462 北京理工大学机械与车辆学院北京100081

选择3辆轻型汽油车进行了基于WLTC和NEDC循环下的排放试验,对其常规污染物和氨的排放特性进行了分析。结果表明:氨是发动机原始排气进入三元催化器后发生氧化还原反应的副产物;持续时间较长的加速工况是氨生成的主要工况,此时原排气中... 详细信息

选择3辆轻型汽油车进行了基于WLTC和NEDC循环下的排放试验,对其常规污染物和氨的排放特性进行了分析。结果表明:氨是发动机原始排气进入三元催化器后发生氧化还原反应的副产物;持续时间较长的加速工况是氨生成的主要工况,此时原排气中较高浓度的CO在三元催化器内提供了较强的还原环境,而导致氨的生成;随着行驶里程的增加,氨排放呈上升趋势;低温环境下更容易产生较高的CO与氨排放。

关键词：氨排放特性 WLTC循环 NEDC循环三元催化器

国六轻型车实际道路与实验室工况排放特性对比研究

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车用发动机 2019年第6期 64-70页

作者：罗佳鑫温溢杨正军朱庆功潘朋中国汽车技术研究中心有限公司

分析了26辆国六轻型汽油车在NEDC、WLTC循环工况与RDE工况下的排放试验结果。结果表明:在不同工况下,国六轻型车CO与THC的符合性因子基本低于0.6;NOx排放在RDE工况下的符合性因子可适当降低;RDE工况下的PN排放成为目前国六轻型车需要关... 详细信息

分析了26辆国六轻型汽油车在NEDC、WLTC循环工况与RDE工况下的排放试验结果。结果表明:在不同工况下,国六轻型车CO与THC的符合性因子基本低于0.6;NOx排放在RDE工况下的符合性因子可适当降低;RDE工况下的PN排放成为目前国六轻型车需要关注的重点,其中直喷汽油车PN排放较高;直喷汽油车在实际道路行驶工况下的PN排放与车速、加速度存在较强的相关性,PN排放主要集中于车速高于50 km/h且加速度大于0.5 m/s^2的加速工况内;RDE工况下冷起动过程中车辆的CO与PN排放较高,是否包含冷起动过程,对RDE试验结果产生的影响较大。

关键词：汽油车实际道路排放 WLTC NEDC 颗粒物数浓度