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Oxygen-vacancy-rich TiO_(2)enables highly active and durable water electrolysis of urchin-like RuO_(2)catalyst

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Science China(Technological Sciences) 2022年第10期65卷 2317-2324页

作者： GAO HongMei XIAO MeiLing LI GuoQiang GAO LiQin MENG QingLei LUO ZhaoYan LUO ErGui LIU ChangPeng JIN Zhao GE JunJie XING Wei State key laboratory of Electroanalytical Chemistry Changchun Institute of Applied ChemistryChinese Academy of SciencesChangchun 130022China laboratory of Advanced power Sources Jilin Province Key Laboratory of Low Carbon Chemical Power SourcesChangchun Institute of Applied ChemistryChinese Academy of SciencesChangchun 130022China.

The material innovation is prerequisite to accelerating sluggish oxygen evolution reaction(OER)kinetics,thus promoting the realization of hydrogen energy ***,we develop an oxygen-vacancy-rich TiO_(2)supported RuO_(2)catalyst(RuO_(2)@r-TiO_(2))towards improved OER activity and *** oxygen vacancy on TiO_(2)not only supplies electrons to produce lower valence Ru,but also provides sufficient anchoring site for the deposition of RuO_(2)*** that,it can generate strong electronic interaction between TiO_(2)and supported RuO_(2),and thereby tailors the intermediates’adsorption energy on the RuO_(2)*** a result,the derived RuO_(2)@r-TiO_(2)catalyst exhibits superior OER activity and stability with the overpotential of 211 mV at a current density of 10 mA cm^(−2)and negligible activity degradation after 6 h operation,outperforming the non-oxygen-vacancy counterpart(223.3 mV,12.75%activity loss)and RuO_(2)catalyst(234.6 mV,42.86%activity loss).

关键词： oxygen evolution reaction oxygen vacancy electronic interaction stability

Highly dispersed L1_(0)-PtZn intermetallic catalyst for efficient oxygen reduction

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Science China Materials 2021年第7期64卷 1671-1678页

作者： Tuo Zhao Ergui Luo Yang Li Xian Wang Changpeng Liu Wei Xing Junjie Ge State key laboratory of Electroanalytical Chemistry Jilin Province Key Laboratory of Low Carbon Chemical PowerChangchun Institute of Applied ChemistryChinese Academy of SciencesChangchun 130022China School of Applied Chemistry and Engineering University of Science and Technology of ChinaHefei 230026China

Highly active and durable electrocatalysts with minimal Pt usage are desired for commercial fuel cell ***,we present a highly dispersed L1_(0)-PtZn intermetallic catalyst for the oxygen reduction reaction(ORR),in which a Zn-rich metal–organic framework(MOF)is used as an in situ generated support to confine the growth of PtZn *** requiring high-temperature treatment,the intermetallic L1_(0)-PtZn particles exhibit a small mean size of3.95 nm,which confers the catalysts with high electrochemical active surface area(81.9 m^(2)g_(Pt)^(-1))and atomic *** Pt electron structure and binding strength between Pt and oxygen intermediates are optimized through ligand effect and compressive *** advantages result in ORR mass activity and specific activity of 0.926 A mg_(Pt)^(-1) and 1.13 mA cm^(-2),respectively,which are 5.4 and 4.0 times those of commercial Pt/*** stable L10structure provides the catalysts with superb durability;only a halfwave potential loss of 11 mV is observed after 30,000 cycles of accelerated stress tests,through which the structure evolves into a more stable PtZn-Pt core-shell ***,the development of a Zn-based MOF as a catalyst support is demonstrated,providing a synergy strategy to prepare highly dispersed intermetallic alloys with high activity and durability.

关键词： L1_(0)-PtZn intermetallic catalyst Zn vapor protect confinement effect morphological evolution ORR

Single-Molecule Fluorescence Imaging of Nanocatalysis

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Chinese Journal of Chemistry 2021年第6期39卷 1459-1470页

作者： Yi Xiao Weilin Xu State key laboratory of Electroonalytical Chemistry and jilin Province key laboratory of low carbon chemical power Changchun Institute of Applied ChemistryChinese Academy of Sciences5625 Renmin StreetChangchunJilin 130022China University of Science and Technology of China HefeiAnhui 230026China

Single-molecule fluorescence microscopy(SMFM)has been considered as a powerful tool to study nanocatalysis of single nanoparticles,due to its single-molecule sensitivity and high spatiotemporal *** this review,we discuss recent progresses on investigating nanocatalysis at single-mol-ecule/particle level by using *** discussion focuses on the applications of single-molecule methods in probing the chemocatalysis,electrocatalysis,photocatalysis and ***,we provide our opinions on limitations and prospects of the single-molecule fluorescence approach for investigating nanocatalysis.

关键词： Single-molecule studies Fluorescence Single nanoparticles Super-resolution imaging Heterogeneous catalysis

Co/CoO heterojunction rich in oxygen vacancies introduced by O2 plasma embedded in mesoporous walls of carbon nanoboxes covered with carbon nanotubes for rechargeable zinc-air battery

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carbon Energy 2024年第7期6卷 14-25页

作者： Leijun Ye Weiheng Chen Zhong-Jie Jiang Zhongqing Jiang key laboratory of Optical Field Manipulation of Zhejiang Province Department of PhysicsZhejiang Sci-Tech UniversityHangzhouChina Department of Mechanical Engineering Ningbo University of TechnologyNingboChina Guangzhou key laboratory for Surface Chemistry of Energy Materials Guangdong Engineering and Technology Research Center for Surface Chemistry of Energy MaterialsCollege of Environment and EnergySouth China University of TechnologyGuangzhouChina

Herein,Co/CoO heterojunction nanoparticles(NPs)rich in oxygen vacancies embedded in mesoporous walls of nitrogen-doped hollow carbon nanoboxes coupled with nitrogen-doped carbon nanotubes(P-Co/CoOV@NHCNB@NCNT)are well designed through zeolite-imidazole framework(ZIF-67)carbonization,chemical vapor deposition,and O_(2) plasma *** a result,the threedimensional NHCNBs coupled with NCNTs and unique heterojunction with rich oxygen vacancies reduce the charge transport resistance and accelerate the catalytic reaction rate of the P-Co/CoOV@NHCNB@NCNT,and they display exceedingly good electrocatalytic performance for oxygen reduction reaction(ORR,halfwave potential[EORR,1/2=0.855 V *** hydrogen electrode])and oxygen evolution reaction(OER,overpotential(η_(OER,10)=377mV@10mA cm^(−2)),which exceeds that of the commercial Pt/C+RuO_(2) and most of the formerly reported ***,both the aqueous and flexible foldable all-solid-state rechargeable zinc-air batteries(ZABs)assembled with the P-Co/CoOV@NHCNB@NCNT catalyst reveal a large maximum power density and outstanding long-term cycling ***-principles density functional theory calculations show that the formation of heterojunctions and oxygen vacancies enhances conductivity,reduces reaction energy barriers,and accelerates reaction kinetics *** work opens up a new avenue for the facile construction of highly active,structurally stable,and cost-effective bifunctional catalysts for ZABs.

关键词： heterojunction oxygen evolution/reduction reaction oxygen vacancies rechargeable zinc–air battery three‐dimensional nitrogen‐doped hollow carbon nanoboxes

Highly active PtAu alloy surface towards selective formic acid electrooxidation

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Journal of Energy Chemistry 2019年第10期28卷 157-162页

作者： Liang Liang Fateev Vladimir Junjie Ge Changpeng Liu Wei Xing laboratory of Advanced power Sources Changchun Institute of Applied ChemistryChinese Academy of SciencesChangchun 130022JilinChina University of Chinese Academy of Sciences Beijing 100039China jilin Province key laboratory of low carbon chemical power Sources Changchun 130022JilinChina State key laboratory of Electroanalytical Chemistry Changchun Institute of Applied ChemistryChinese Academy of SciencesChangchun 130022JilinChina National Research Center“Kurchatov Institute” Kurchatov sq.1MoscowRussia

The electrochemical oxidation of formic acid has been attracting significant attention in the past few years due to the great potential prospect of direct formic acid fuel cell (DFAFC) in applications, including high theoretical open circuit potential (1.48 V), low fuel crossover, high practical power densities at low temperature, facilitating of proton transport in catalyst layers and low toxicity [1-5].

关键词： Formic acid oxidation PtAu Electrocatalysis DFAFC Nanostructure

Direct self-assembly of CTAB-capped Au nanotriangles

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Nano Research 2016年第11期9卷 3247-3256页

作者： Qiang Fu Guangjun Ran Weilin Xu State key laboratory of Electroanalytical Chemistry and Jilin Province Key Laboratory of Low Carbon Chemical Power Changchun Institute of Applied Chemistry Chinese Academy of Sciences Changchun 130022 China College of Chemistry and Environmental Engineering Shenzhen University Shenzhen 518060 China University of Chinese Academy of Sciences Beijing 100049 China

Densely packed and ordered ＂suprastructures＂ are new types of nanomaterials exhibiting broad applications. The direct self-assembly of cetyltrimethylammonium bromide （CTAB）-capped gold nanotriangles to form ＂suprastructures＂ was systematically investigated by varying the temperature and tilt angle of the silicon wafer used in the assembly process. Under optimal conditions, nanotriangles form into regular patterns, maintain their integrity, and form edge-to-edge, point-to-point, and face-to-face connections to form ordered ＂suprastructures＂ within an area of hundreds of square microns, achieving a high level of regularity. The formation of the ＂suprastructures＂ under optimal conditions could be mainly attributed to the complex balance between multiple temperature-dependent factors, including the atom diffusion rate, solvent evaporation rate, self-assembly rate, and the time for which the nanoparticle stays in the wet medium.

关键词： suprastructure Au nanotriangles self-assembly cetyltrimethylammonium bromide (CTAB)

Highly dispersed L1_(2)-Pt_(3)Fe intermetallic particles supported on single atom Fe-N_(x)-C_(y)active sites for enhanced activity and durability towards oxygen reduction

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Chinese chemical Letters 2023年第5期34卷 343-347页

作者： Tuo Zhao Yang Li Jie Liu Xian Wang Jiayi Zhang Changpeng Liu Wei Xing Junjie Ge State key laboratory of Electroanalytical Chemistry Jilin Province Key Laboratory of Low Carbon Chemical PowerChangchun Institute of Applied ChemistryChinese Academy of SciencesChangchun 130022China School of Applied Chemistry and Engineering University of Science and Technology of ChinaHefei 230026China Fuyuan British American School Shenzhen 518126China

Highly active and durable oxygen reduction reaction(ORR)catalysts with sufficient activity and stability of Pt are beneficial for the commercialization of proton exchange membrane fuel *** we report an effective approach to prepare a composite catalyst comprising of ordered L1_(2)-Pt_(3)Fe intermetallic nanoparticles interact with single atom Fe-N_(x)-C_(y)active *** addition of Fe and the confinement effect of hierarchical porous structure limit the growth of intermetallic particle size(around2.5 nm).The ligand effect of the electron transfer from Fe to Pt and the synergistic interaction between L1_(2)-Pt_(3)Fe and Fe-N_(x)-C_(y)work together to reduce oxygen intermediates adsorption and improve kinetics ***,the L1_(2)-Pt_(3)Fe/C_(Fe-N-C)catalyst shows high mass activity and specific activity at 1.010 A/mg_(Pt)and 1.166 mA/cm^(2),respectively,which are 5.8 and 5.1 times higher than those of commercial Pt/C(0.174 A/mg_(Pt)and 0.230mA/cm^(2)).Thanks to the more stable L1_(2)structure,L1_(2)-Pt_(3)Fe/C_(Fe-N-C)exhibits better durability(14mV E_(1/2)loss of L1_(2)-Pt_(3)Fe/C_(Fe-N-C)and 33 mV E_(1/2)loss of commercial Pt/C)after 30,000 cycles accelerated stress *** strategy to design and prepare small particle Pt-based intermetallic alloys coordinated with M-N-C active sites provides a new direction to obtain low-cost and easily prepared effective ORR catalysts.

关键词： Intermetallic alloys Single atom active sites ORR Synergistic effect Confinement effect

Sustainable catalytic graphitization of biomass to graphitic porous carbon by constructing permeation network with organic ligands

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Chinese Journal of chemical Engineering 2023年第12期64卷 259-270页

作者： Pengfei Liu Wenqiao Du Xiangjing Liu Long Zhang Zhimin Chen jilin provincial Engineering laboratory for the Complex Utilization of Petro-Resources and Biomass School of Chemical EngineeringChangchun University of TechnologyJilin 130012China

Common strategies for catalytic graphitization of biochar into graphitic porous carbon(GPC)still face great challenges,such as the realization of simple procedures,energy conservation,and green *** over the graphitization degree and pore structure of biochar is the key to its structural ***,a clean and energy-efficient method is developed to synthesize adjustable graphitic degree and structure porosity GPC from rice husk-based carbon(RHC)at a relatively low temperature of 800–1000°C with environment-benign organometallic catalyst ethylenediaminetetraacetic acid ferric sodium salt(EDTA-iron)and the recovery ratio of catalyst is as high as 97%.The formed by the organic ligands of EDTA-iron facilitates the etching of RHC surface and pore by iron,resulting in highly graphitized and developed porous *** pore structure and graphitization degree of GPCs can be adjusted by altering the catalyst loading,temperature,and holding *** catalyst EDTA-iron with a lower concentration mainly plays the role of etching,which promotes the formation of porous carbon with larger surface area(SBET=1187.2 m^(2)·g^(-1)).The catalyst with higher concentration mainly plays the role of catalyzing graphitization and promotes the obtaining of graphitic carbon with high graphitization degree(ID/IG=0.19).The mechanism of EDTA-iron catalyzed graphitization of RHC is explored by the comprehensive analysis of BET,XRD,Raman,TEM and *** research not only provides an efficient method for the preparation of high-quality biomass-based graphite carbon,but also provides a feasible method for the preparation of biomass-based porous carbon.

关键词： Catalytic graphitization EDTA-iron Rice husk Porous carbon Graphite

Designing high-efficiency light-to-thermal conversion materials for solar desalination and photothermal catalysis

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Journal of Energy Chemistry 2023年第4期79卷 581-600页

作者： Hanjin Jiang Xinghang Liu Dewen Wang Zhenan Qiao Dong Wang Fei Huang Hongyan Peng Chaoquan Hu State key laboratory of Superhard Materials Key Laboratory of Automobile Materials of Ministry of EducationSchool of Materials Science and EngineeringJilin Provincial International Cooperation Key Laboratory of High-Efficiency Clean Energy MaterialsJilin UniversityChangchun 130012JilinChina State key laboratory of Inorganic Synthesis and Preparative Chemistry College of ChemistryJilin UniversityChangchun 130012JilinChina College of chemical Engineering Northeast Electric Power UniversityJilin 132012JilinChina Department of Orthopedics China Japan Union Hospital of Jilin UniversityChangchun 130033JilinChina School of Physics and Electronic Engineering Hainan Normal UniversityHaikou 571158HainanChina

Light-to-thermal conversion materials(LTCMs)have been of great interest to researchers due to their impressive energy conversion capacity and wide range of applications in biomedical,desalination,and synergistic *** the limited advances in existing materials(metals,semiconductors,π-conjugates),researchers generally adopt the method of constructing complex systems and hybrid structures to optimize performance and achieve multifunctional ***,the development of LTCMs is still in its infancy as the physical mechanism of light-to-thermal conversion is *** this review,we proposed design strategies for efficient LTCMs by analyzing the physical process of light-tothermal ***,we analyze the nature of light absorption and heat generation to reveal the physical processes of light-to-thermal ***,we explain the light-to-thermal conversion mechanisms of metallic,semiconducting andπ-conjugated LCTMs,and propose new material design strategies and performance improvement ***,we summarize the challenges and prospects of LTCMs in emerging applications such as solar water evaporation and photothermal catalysis.

关键词： Light-to-thermal conversion Solar energy conversion Material design Performance improvement Solar water evaporation Photothermal catalysis