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Chemical Research in Chinese Universities 2022年第4期38卷 961-967页

作者： ZHENG Ruonan ZHAI Zihui QIU Chenxi GAO Rui LV Yang song yujiang State Key Laboratory of Fine Chemicals&Dalian Key Laboratory of Core Materials and Units for Hydrogen Energy and Fuel Cells School of Chemical EngineeringDalian University of TechnologyDalian116024P.R.China

Zeolite imidazole frameworks 8(ZIF-8)and modified ones after pyrolysis are highly promising toward oxygen reduction reaction(ORR).Especially,the compositional modification of ZIF-8 is crucial to the enhancement of ORR performance,yet limited to the substitution of skeletal Zn(II)with other cations or simple physical adsorption of ***,we report the decoration of ZIF-8 with ORR active hemin(FeP)and Co(III)protoporphyrin(CoP)via the coordination between the peripheral carboxylic group of FeP and CoP with skeletal Zn(II).This allows well control over the quantity of loaded FeP and CoP,critical to the synthesis of advanced *** pyrolysis of FeP and CoP co-decorated ZIF-8 leads to highly active ORR electrocatalysts with a half-wave potential(E1/2)of 0.913 V(***)in 0.1 mol/L KOH *** an E1/2 of 0.803 V(***)in 0.1 mol/L HClO4 ***,our electrocatalyst shows much more improved and comparable durability in alkaline and acidic media,respectively,during 3000 cycles of cyclic voltammetry(CV)scanning relative to commercial Pt/C.

关键词： Non-noble metal electrocatalyst ZIF-8 Porphyrin Oxygen reduction reaction(ORR)

Facile synthesis and electrochemical properties of MnO_2/carbon nanotubes

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Particuology 2014年第4期12卷 34-38页

作者： Yang Lv Huanqiao Li Yan Xie Shushuang Li Jia Li Yongheng Xing yujiang song College of Chemistry and Chemical Engineering Liaoning Normal University Dalian National Laboratories for Clean Energy Dalian Institute of Chemical PhysicsChinese Academy of Sciences Dalian University of Technology

The poor electrical conductivity of MnO2 limits its use as an electrode material. To overcome this limitation, we report an easy and rapid approach to deposit nanosized MnO2 onto multi-wall carbon nanotubes functionalized with hydroxyl groups （MWCNTs-OH） by chemical reduction of KMnO4 with MnSO4 in aqueous solution under ambient conditions. Characterization with XRD and TEM reveals that the obtained MnO2/MWCNTs-OH composite is nanocrystalline and partially covered by Mn02 nanosheets with a thick- ness of 1-3 nm at a MnO2 loading of 20 wt%. Cyclic voltammetry （CV） and galvanostatic charge-discharge measurements reveal that the MnO2/MWCNTs-OH composite with a MnO2 loading of 20 wt% has a relatively high specific capacitance of 234 F/g at a scan rate of 2 mV/s and exhibits good cycling stability. Furthermore, the oxygen reduction reaction （ORR） shows that MnO2/MWCNTs-OH composite may have potential applications as a non-noble metal electrocatalyst in fuel cells and metal-air batteries.

关键词： MnO2 MWCNTs-OH SupercapacitorNon-noble metal electrocatalyst

Carbonized Yolk-shell Metal-Organic Frameworks for Electrochemical Conversion of CO_(2) into Ethylene

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高等学校化学研究:英文版 2023年第2期39卷 246-252页

作者： WANG Renquan LI Tiantian GAO Rui QIN Jiaqi LI Mengyao GUO Yizheng song yujiang State Key Laboratory of Fine Chemicals School of Chemical EngineeringDalian University of TechnologyDalian116024P.R.China

With the excessive consumption of fossil fuels and the massive emission of CO_(2),it has led to a series of environmental crises posing a serious threat to sustainable *** CO_(2) reduction reaction( CO_(2)RR)to ethylene helps solve these serious environmental ***,we report the synthesis of a copper-based electrocatalyst by pyrolysis of yolk-shell structured HKUST-1 with partial substitution of trimesic acid by benzimidazole(nitrogen source).The electrocatalyst exhibits an ethylene Faradic efficiency(FE)of 25.8%and a partial ethylene current density of 23.7 mA/cm^(2),in addition,the electrocatalyst can maintain stable performance during 10 h of electrolysis,which are all better than those of the electrocatalyst without nitrogen *** to electrochemical measurements and X-ray photoelectron spectroscopy(XPS),we propose that the nitrogen dopant plays an effective role in stabilizing Cu(I)species and promoting CO_(2) molecules activation,as well as suppressing the reduction of Cu(I)species during ***,the performance of the electrocatalyst toward CO_(2)RR is studied in a flow *** work provides a new route for the design of Cu-based electrocatalyst toward electrochemical CO_(2) conversion into ethylene.

关键词： CO_(2) Cu MOF Electrocatalyst Nitrogen Ethylene

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电气化公路运输系统与ESG投资分析

交通节能与环保 2024年第4期20卷 6-11页

作者：曾蕴琦宋禹江李京飞陈跃峰中国机械科学研究总院集团有限公司北京100044 交通运输部公路科学研究院北京100088 中车株洲电力机车有限公司湖南株洲412001 人民交通出版社股份有限公司北京100011

由于电气化公路运输系统比其他运输形式具有提升能源效率、降低运营成本、有助于解决交通运输相关产业绿色转型升级建设所产生的负面环境影响,本研究运用ESG投资分析方法,分析了电气化公路运输系统对环境、经济和社会的影响,评估了在实... 详细信息

由于电气化公路运输系统比其他运输形式具有提升能源效率、降低运营成本、有助于解决交通运输相关产业绿色转型升级建设所产生的负面环境影响,本研究运用ESG投资分析方法,分析了电气化公路运输系统对环境、经济和社会的影响,评估了在实现可持续发展方面的作用。研究表明:在目前中国绿色低碳经济转型宏观趋势下,电气化公路运输系统在不同环境友好的交通绿色转型投资类型中,具有更好的绿色低碳、社会进步和经济效益。

关键词：电气化公路 ESG投资气候变化架空接触网受电弓

Pyrolysis of Iron(Ⅲ) porphyrin coated Pt/C toward oxygen reduction reaction in acidic medium

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Progress in Natural Science:Materials International 2020年第6期30卷 832-838页

作者： Yang Lv Huiyuan Liu Jiaqi Qin Rui Gao Yunlong Zhang Yan Xie Jia Li yujiang song State Key Laboratory of Fine Chemicals School of Chemical Engineering Dalian University of Technology Department of Mechanical and Mechatronics Engineering University of Waterloo Dalian National Laboratory for Clean Energy Dalian Institute of Chemical Physics Chinese Academy of Sciences College of Engineering and Applied Sciences Nanjing University

Design and synthesis of highly active and durable electrocatalysts toward oxygen reduction reaction(ORR) is of particular importance for proton exchange membrane fuel cells(PEMFCs), yet remains a grand challenge. Herein, we report the deposition of iron(III) porphyrin(Fe P) on house-made Pt/C by rotary evaporation of the mixture of Fe P and house-made Pt/C dispersed in chloroform, followed by pyrolysis at 650 °C in argon atmosphere. This approach led to the synthesis of new non-precious metal electrocatalyst(NPME)-Pt/C composites(Pt/C–Fe P) with an average nanoparticle diameter of 3.1 ± 1.5 nm without aggregation. According to X-ray photoelectron spectroscopy(XPS), the binding energy of Pt 4 f7/2became larger due to the presence of pyrolyzed Fe P. In addition, the electrochemically active surface area(ECSA) of Pt/C–Fe P-650 is 65 m2/g less than that of house-made Pt/C(80.2 m2/g). This implies that the pyrolyzed Fe P may have partially covered the surface of Pt nanoparticles and thus lowering the ECSA. Interestingly, the mass activity(MA) of Pt/C–Fe P turns out to be 349.0 m A/mgPt@0.9 V vs. RHE, which is 2.6 times and 1.5 times of house-made Pt/C and commercial Pt/C, respectively. It is speculated that the electronic interaction and possible synergy between Pt and pyrolyzed Fe P as NPME might have contributed to the ORR activity improvement despite of partial loss of ECSA. During accelerated durability tests(ADTs), the MA of Pt/C–Fe P-650 degrades 64.3% inferior to commercial Pt/C(52.2%). The main reason likely arises from the degradation of pyrolyzed Fe P, which is a bottleneck problem confronting NPMEs.

关键词： Proton exchange membrane fuel cells Oxygen reduction reaction Electrocatalysts Mass activity Durability

Light-controlled synthesis of uniform platinum nano- dendrites with markedly enhanced electrocatalytic activity

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Nano Research 2013年第10期6卷 720-725页

作者： Weifeng Si Jia Li Huanqiao Li Shushuang Li Jie Yin Huan Xu Xinwen Guo Tao, Zhang yujiang song Dalian National Laboratories for Clean Energy (DNL) Dalian Institute of Chemical Physics (DICP) Chinese Academy of Sciences 457 Zhongshan Road Dalian 116023 China School of Chemistry and Chemical Engineering Liaoning Normal University 850 Huanghe Road Dalian 116029 China State Key Laboratory of Fine Chemicals School of Chemical Engineering Dalian University of Technology Dalian 116024 China State Key Laboratory of Catalysis DICP Chinese Academy of Sciences 457 Zhongshan Road Dalian 116023 China These two authors contributed equally to this work

We report a fast in situ seeding approach based on zinc（II） porphyrin （ZnP） under white light irradiation, leading to uniform spherical platinum nanodendrites with tunable sizes. The platinum nanodendrites exhibit significantly improved electrocatalytic activities toward oxygen reduction reaction （ORR） and methanol oxidation reaction （MOR） compared with commercial platinum black.

关键词： platinum nanodendrites zinc(II) porphyrin oxygen reduction reaction methanol oxidation reaction

Incremental Unknowns Method for Solving Three-Dimensional Convection-Diffusion Equations

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Numerical Mathematics A Journal of Chinese Universities(English Series) 2007年第1期16卷 14-27页

作者： Lunji song yujiang Wu School of Mathematics and Statistics Lanzhou University Lanzhou 730000 China.

We use the incremental unknowns method in conjunction with the iterative methods to approximate the solution of the nonsymmetric and positive-definite linear systems generated from a multilevel discretization of three-dimensional convection-diffusion equations. The condition numbers of incremental unknowns matrices associated with the convection-diffusion equations and the number of iterations needed to attain an acceptable accuracy are estimated. Numerical results are presented with two-level approximations, which demonstrate that the incremental unknowns method when combined with some iter- ative methods is very effcient.

关键词：逻辑积扩散方程离散化迭代法

Pt@h-BN core-shell fuel electrocatalysis confined cell electrocatalysts wit under outer shells

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Nano Research 2018年第6期11卷 3490-3498页

作者： Mengmeng Sun Jinchao Dong Yang Lv Siqin Zhao Caixia Meng yujiang song Guoxiong Wang Jianfeng Li Qiang Fu Zhongqun Tian Xinhe Bao State Key Laboratory of Catalysis iChEM Dalian Institute of Chemical Physics Chinese Academy of Sciences Dalian 116023 China University of Chinese Academy of Sciences Beijing 100049 China MOE Key Laboratory of Spectrochemical Analysis and Instrumentation State Key Laboratory of Physical Chemistry of Solid Surfaces iChEM College of Chemistry and Chemical Engineering Xiamen University Xiamen 361005 China State Key Laboratory of Fine Chemicals School of Chemical Engineering Dalian University of Technology Dalian 116024 China

Two-dimensional （2D） materials such as graphene and hexagonal boron nitride （h-BN） can be used as robust and flexible encapsulation overlayers, which effectively protect metal cores but allow reactions to occur between inner cores and outer shells. Here, we demonstrate this concept by showing that Pt@h-BN core-shell nanocatalysts present enhanced performances in H2/O2 fuel cells. Electrochemical （EC） tests combined with operando EC-Raman characterizations were performed to monitor the reaction process and its intermediates, which confirm that Pt-catalyzed electrocatalytic processes happen under few-layer h-BN covers. The confinement effect of the h-BN shells prevents Pt nanoparticles from aggregating and helps to alleviate the CO poisoning problem. Accordingly, embedding nanocatalysts within ultrathin 2D material shells can be regarded as an effective route to design high-performance electrocatalysts.

关键词： electrocatalysis two-dimensional materials core-shell confinement catalysis operando Raman

Influence of counter electrode material during accelerated durability test of non-precious metal electrocatalysts in acidic medium

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Chinese Journal of Catalysis 2016年第7期37卷 1109-1118页

作者：李佳刘会园吕洋郭新闻宋玉江大连理工大学化工学院精细化工国家重点实验室辽宁大连116024 中国科学院大连化学物理研究所洁净能源国家实验室(筹)辽宁大连116023

Significant progress has been made in the development of non-precious metal electrocatalysts （NPMEs） during the past decade. Correspondingly, there is an urgent demand for an appropriate measurement method to be established for the reliable evaluation of NPMEs. In this study, platinum and graphite counter electrodes were used to investigate the impact of counter electrode material on the accelerated durability testing （ADT） of NPMEs in acidic medium. Platinum used as the coun- ter electrode in a traditional three-electrode electrochemical cell was found to dissolve in acidic medium and re-deposit on NPME coated on the working electrode during ADT. Such re-deposition causes the oxygen reduction reaction （ORR） performance of NPMEs to remarkably improve, and thus will seriously mislead our judgment of NPMEs if we are unaware of it. The phenomenon can be avoided using a graphite counter electrode.

关键词： Non-precious metal electrocatalystPlatinum counter electrodeGraphite counter electrodeAccelerated durability testAcid medium

High-Performance Electrocatalyst for Oxygen Reduction Based on Graphene Oxide, Dual N-Containing Ligands, Iron, and Cobalt

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High-Performance Electrocatalyst for Oxygen Reduction Based ...