检索结果-南通市图书馆

Energy Engineering 2024年第5期121卷 1161-1172页

作者： Yingli Zhu Jiachi Xie Mingwei Zhu Jun Zhang Miaomiao Li Tianjin Key Laboratory of Integrated Design and On-line Monitoring for Light Industry&Food Machinery and Equipment School of Mechanical EngineeringTianjin University of Science&TechnologyTianjin300222China Tianjin College University of Science and Technology BeijingTianjin301830China Jiangsu Key Laboratory of Precision and Micro-Manufacturing Technology College of Mechanical and Electrical EngineeringNanjing University of Aeronautics and AstronauticsNanjing210016China

The open ratio of a current collector has a great impact on direct methanol fuel cell(DMFC)*** a number of studies have investigated the influence of the open ratio of DMFC current collectors,far too little attention has been given to how geometry(including the shape and feature size of the flow field)affects a current collector with an equal open *** this paper,perforated and parallel current collectors with an equal open ratio of 50%and different feature sizes are designed,and the corresponding experimental results are shown to explain the geometry effects on the output power of the *** results indicate that the optimal feature sizes are between 2 and 2.5 mm for both perforated and parallel flow field in the current collectors with an equal open ratio of 50%.This means that for passive methanol fuel cells,to achieve the highest output power,the optimal feature size of the flow field in both anode and cathode current collectors is between 2 and 2.5 mm under the operating mode of this *** effects of rib and channel position are also investigated,and the results indicate that the optimum pattern depends on the feature sizes of the flow field.

关键词： direct methanol fuel cell geometry open ratio current collector position

Upcycling end of lithium cobalt oxide batteries to electrocatalyst for oxygen reduction reaction in direct methanol fuel cell via sustainable approach

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Energy Chemistry 2023年第7期82卷 148-157,I0004页

作者： Keyru Serbara Bejigo Kousik Bhunia Jungho Kim Chaehyeon Lee Seoin Back Sang-Jae Kim Nanomaterials&System Lab Major of Mechatronics EngineeringFaculty of Applied Energy SystemJeju National UniversityJeju 63243Republic of Korea Nanomaterials&System Lab Major of Mechanical System EngineeringCollege of EngineeringJeju National UniversityJeju 63243Republic of Korea Research Institute of New Energy Industry(RINEI) Jeju National UniversityJeju 63243Republic of Korea Department of Chemical and Biomolecular Engineering Institute of Emergent MaterialsSogang UniversitySeoul 04107Republic of Korea

Recycling spent lithium-ion batteries(SLIBs)has become essential to preserve the environment and reclaim vital resources for sustainable *** typical SLIBs recycling concentrated on separating valuable components had limitations,including high energy consumption and complicated separation *** work suggests a safe hydrometallurgical process to recover usable metallic cobalt from depleted LiCoO_(2)batteries by utilizing citric acid as leachant and hydrogen peroxide as an oxidizing agent,with ethanol as a selective precipitating *** anode graphite was also recovered and converted to graphene oxide(GO).The above components were directly resynthesized to cobaltintegrated nitrogen-doped graphene(Co@NG).The Co@NG showed a decent activity towards oxygen reduction reaction(ORR)with a half-wave potential of 0.880 V ***,almost similar to Pt/C(0.888 V ***)and with an onset potential of 0.92 V *** metal-nitrogen-carbon(Co-N-C)having the highest nitrogen content has decreased the barrier for ORR since the reaction was enhanced for Co@NG-800,as confirmed by density functional theory(DFT)*** Co@NG cathode catalyst coupled with commercial Pt-Ru/C as anode catalyst exhibits excellent performance for direct methanol fuel cell(DMFC)with a peak power density of 34.7 mW cm^(-2)at a discharge current density of120 m A cm^(-2)and decent stability,indicating the promising utilization of spent battery materials in DMFC ***,lithium was recovered from supernatant as lithium carbonate by coprecipitation *** work avoids sophisticated elemental separation by utilizing SLIBs for other renewable energy applications,lowering the environmental concerns associated with recycling.

关键词： Density functional theory(DFT) direct methanol fuel cell Leaching Nitrogen doping Oxygen reduction reaction Recycling Spent lithium-ion batteries

Advances and challenges of methanol-tolerant oxygen reduction reaction electrocatalysts for the direct methanol fuel cell

在线全文

学校读者我要写书评

暂无评论

Journal of Energy Chemistry 2023年第2期77卷 499-513,I0013页

作者： Muhammad Aizaz Ud Din Muhammad Idrees Sidra Jamil Syed Irfan Ghazanfar Nazir Muhammad Ahmad Mudassir Muhammad Shahrukh Saleem Saima Batool Nanpu Cheng Rahman Saidur School of Materials and Energy Southwest UniversityChongqing 400715China Additive Manufacturing Institute College of Mechatronics and Control EngineeringShenzhen UniversityShenzhen 518060GuangdongChina Chongqing Key Lab for Advanced Materials and Clean Energies of Technologies School of Materials and EnergySouthwest UniversityChongqing 400715China School of Materials Science and Engineering Dongguan University of TechnologyDongguan 523808GuangdongChina Department of Nanotechnology and Advanced Materials Engineering Sejong UniversitySeoul 05006Republic of Korea Department of Chemistry Khawaja Fareed University of Engineering and Information TechnologyRahim Yar Khan 64200Pakistan Laboratory for High Performance Ceramics EmpaSwiss Federal Laboratories for Materials Science and Technology8600 DübendorfSwitzerland Institute for Advanced Study Shenzhen UniversityShenzhen 518060GuangdongChina Research Centre for Nano-Materials and Energy Technology School of Engineering and TechnologySunway UniversityBandar SunwayMalaysia Department of Engineering Lancaster UniversityLancasterUnited Kingdom

methanol cross-over effects from the anode to the cathode are important parameters for reducing catalytic performance in direct methanol fuel cells.A promising candidate catalyst for the cathode in direct methanol fuel cells must have excellent activity toward oxygen reduction reaction and resistance to methanol oxidation *** review focuses on the methanol tolerant noble metal-based electrocatalysts,including platinum and palladium-based alloys,noble metal–carbon based composites,transition metal-based catalysts,carbon-based metal catalysts,and metal-free *** understanding of the correlation between the activity and the synthesis method,electrolyte environment and stability issues are *** the transition metal-based catalyst,their activity,stability and methanol tolerance in direct methanol fuel cells and comparisons with those of platinum are particularly ***,strategies to enhance the methanol tolerance and hinder the generation of mixed potential in direct methanol fuel cells are also *** review provides a perspective for future developments for the scientist in selecting suitable methanol tolerate catalyst for oxygen reduction reaction and designing high-performance practical direct methanol fuel cells.

关键词： Oxygen reducing reaction methanol tolerant electrocatalyst Portable power sources direct methanol fuel cell

Ni/Carbon Hybrid Prepared by Hydrothermal Carbonization and Thermal Treatment as Support for PtRu Nanoparticles for direct methanol fuel cell

在线全文

学校读者我要写书评

暂无评论

Journal of Materials Science & Technology 2013年第8期29卷 747-751页

作者： Marcelo Marques Tusi Michele Brandalise Nataly Soares de Oliveira Polanco Olandir Vercino Correa Antonio Carlos da Silva Juan Carlo Villalba Fauze Jaco Anaissi Almir Oliveira Neto Estevam Vitorio Spinac Universidade Regional Integrada do Alto Uruguai e das Missoes-URI Av.Batista Bonoto Sobrinhos/nSao Vicente97700-000 SantiagoRSBrazil Instituto de Pesquisas Energticas e Nucleares-IPEN/CNEN-SP Av.Prof.Lineu Prestes2242Cidade Universitria05508-900 Sao PauloSPBrazil Universidade Estadual do Centro-Oeste-UNICENTRO R.Simeao Varela de S 03Vila Carli85040-080 GuarapuavaPRBrazil

Ni/Carbon was prepared in two steps： initially cellulose as carbon source and NiCl2·6H2O as catalyst of the carbonization process were submitted to hydrothermal treatment at 200 ℃ and further to thermal treatment at 900 ℃ under argon atmosphere. The obtained material contains Ni nanoparticles with face-centered cubic （fcc） structure dispersed on amorphous carbon with graphitic domains. PtRu/C electrocatalysts （carbon- supported PtRu nanoparticles） were prepared by an alcohol-reduction process using Ni/Carbon as support. The materials were characterized by thermogravimetric analysis, energy-dispersive X-ray spectroscopy, Fourier transform infrared spectroscopy, X-ray diffraction, transmission electron microscopy and tested as anodes in single direct methanol fuel cell （DMFC）. The performances of PtRu/C electrocatalysts using Ni/Carbon as support were superior to those obtained for PtRu/C using commercial carbon black Vulcan XC72 as support.

关键词： cellulose Hydrothermal carbonization Alcohol-reduction process PtRu/C electrocatalysts direct methanol fuel cell

Stable NiPt-Mo_(2)C active site pairs enable boosted water splitting and direct methanol fuel cell

在线全文

学校读者我要写书评

暂无评论

Green Energy & Environment 2023年第2期8卷 559-566页

作者： Jing Li Zhu Guo Wenjie Zhang Jing Guo Konggang Qu Weiwei Cai Sustainable Energy Laboratory Faculty of Materials Science and ChemistryChina University of GeosciencesWuhan430074China Shandong Provincial Key Laboratory/Collaborative Innovation Center of Chemical Energy Storage&Novel cell Technology Liaocheng UniversityLiaocheng252059China

Sluggish kinetics of methanol oxidation reaction(MOR)and alkaline hydrogen evolution reaction(HER)even on precious Pt catalyst impede the large-scale commercialization of direct methanol fuel cell(DMFC)and water electrolysis *** both of MOR and alkaline HER are related to water dissociation reaction(WDR),it is reasonable to invite secondary active sites toward WDR to pair with Pt for boosted MOR and alkaline HER activity on ***_(2)C and Ni species are therefore employed to engineer NiPt-Mo_(2)C active site pairs,which can be encapsulated in carbon cages,via an in-situ self-confinement *** activity of Pt in NiPt-Mo_(2)C@C toward HER is boosted to11.3 A mg_(pt)^(-1),33 times higher than that of Pt/***,MOR catalytic activity of Pt in NiPt-Mo_(2)C@C is also improved by 10.5 times and the DMFC maximum power density is hence improved by *** considering the great stability,NiPt-Mo_(2)C@C exhibits great practical application potential in DMFCs and water electrolysers.

关键词： Hydrogen evolution reaction methanol oxidation reaction direct methanol fuel cell Active site pair Self-confinement

Preparation of Nanoporous Carbon/Graphene Composites and Its Application in direct methanol fuel cell

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Chemistry 2012年第12期30卷 2805-2812页

作者： Jin Xiuhua Wei Qinglian Huang Haojun Wang Mengxue Huang Yongmin Key Laboratory of Specially Functional Polymeric Materials and Related Technology of the Ministry of Education Department of Chemistry East China University of Science and Technology Shanghai 200237 China

Nanoporous carbon/graphene composites （NCGC） are synthesized via one-step hydrothermal approach com- bining carbonization, where phenol and formaldehyde are used as carbon sources and triblock copolymers F 127 as template. Transmission electron microscopy （TEM） and nitrogen adsorption measurements show that the synthe- sized NCGC samples possess high surface area over 400 m2·g-1 and mesoporous structures with interconnected pores. The electrochemical studies demonstrate that Pt catalyst with NCGC as support exhibits better eletrocatalytic activity for methanol oxidation as compared to the catalyst taking widely-used VulcanXC-72 as support. In addition, the potential formation mechanism of NCGC is discussed.

关键词： nanoporous carbon/graphene hydrothermal synthesis electrocatalyst direct methanol fuel cell

The Catalysis of NAD^+ on methanol Anode Oxidation Electrode for direct methanol fuel cell

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Wuhan University of Technology(Materials Science) 2004年第4期19卷 23-25页

作者：张萍 Wuhan University of Technology

A tentative idea of developing a liquid-catalytic system on methanol anode oxidation was proposed by analyzing the characteristics of methanol anode oxidation in direct methanol fuel cell. The kinetics of methanol oxidation at a glassy carbon electrode in the presence of nicotinamide adenine dinucleotide (NAD +) was investigated. It is found that the current density of methanol oxidation increases greatly and the electrochemical reaction impedance reduces obviously in the presence of NAD + compared with those in the absence of NAD +. The catalytic activity of NAD + is sensitive to temperature. When the temperature preponderates over 45℃, NAD + is out of function of catalysis for methanol oxidation, which is probably due to the denaturation of NAD + at a relatively high temperature.

关键词： direct methanol fuel cell electrocatalytic oxidation nicotinamide adenine dinucleotide

Preparation and influence of performance of anodic catalysts for direct methanol fuel cell

在线全文

学校读者我要写书评

暂无评论

Frontiers of Chemical Science and Engineering 2007年第1期1卷 20-25页

作者： WANG Zhenbo YIN Geping SHI Pengfei Department of Applied Chemistry Harbin Institute of TechnologyHarbin 150001China

This research aims at increasing the utilization of platinum-ruthenium alloy(Pt-Ru)catalysts and thus lowering the catalyst loading in anodes for methanol *** direct methanol fuel cell’s(DMFC)anodic catalysts,Pt-Ru/C,were prepared by chemical reduction with a reduc-ing agent added in two kinds of solutions under different *** reducing agent was added in hot solution with the protection of inert gases or just air,and in cold solu-tion with inert *** catalysts were treated at different *** performance was tested by cyclic voltam-metry and potentiostatic polarization by utilizing their inher-ent powder microelectrode in 0.5 mol/L CH3OH and 0.5 mol/L H2SO4 *** structures and micro-surface images of the catalysts were determined and observed by X-ray diffrac-tion and transmission electron microscopy,*** catalyst prepared in inert gases showed a better catalytic performance for methanol electrooxidation than that prepared in *** resulted in a more homogeneous distribution of the Pt-Ru alloy in *** size is small,only about 4.5 *** catalytic performance is affected by the order of the reducing agent *** performance of the catalyst pre-pared by adding the reductant at constant temperature of the solution is better than that prepared by adding it in the solu-tion at 0℃ and then heating it up to the reducing *** structure of the catalyst was modified,and there was an increase in the conversion of ruthenium into the alloyed state and an increase in particle size with the ascension of heat treatment *** addition,the stability of the catalyst was improved after heat treatment.

关键词： direct methanol fuel cell methanol electrooxi-dation Pt-Ru/C catalyst powder microelectrode

Preparation of high active Pt/C cathode electrocatalyst for direct methanol fuel cell by citrate-stabilized method

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Transactions of Nonferrous Metals Society of China 2011年第1期21卷 127-132页

作者：蒋庆来彭忠东谢晓峰杜柯胡国荣刘业翔中南大学冶金科学与工程学院长沙410083 清华大学核能与新能源技术研究院北京100084

Platinum nanoparticles supported on carbons（Pt/C,60%,mass fraction） electrocatalysts for direct methanol fuel cell（DMFC） were prepared by citrate-stabilized method with different reductants and carbon *** catalysts were characterized by X-ray diffraction（XRD）,transmission electron microscopy（TEM） and cyclic voltammetry（CV）.It is found that the size of Pt nanoparticles on carbon is controllable by citrate addition and reductant optimization,and the form of carbon support has a great influence on electrocatalytic activity of *** citrate-stabilized Pt nanoparticles supported on BP2000 carbon,which was reduced by formaldehyde,exhibit the best performance with about 2 nm in diameter and 66.46 m2/g（Pt） in electrocatalytic active surface（EAS） *** on single DMFC with 60%（mass fraction） Pt/BP2000 as cathode electrocatalyst showed maximum power density at 78.8 mW/cm2.

关键词： direct methanol fuel cell catalyst Pt/C citrate reductant carbon support

Preparation and characterization of polyvinylchloride membrane embedded with Cu nanoparticles for electrochemical oxidation in direct methanol fuel cell

在线全文

学校读者我要写书评

暂无评论

Transactions of Nonferrous Metals Society of China 2020年第8期30卷 2207-2216页

作者： Rohitash KUMAR Aftab Aslam Parwaz KHAN Anish KHAN Abdullah M ASIRI Yusra HAMID Department of Petroleum Studies Aligarh Muslim UniversityAligarh 202002India Center of Excellence for Advanced Materials Research and Chemistry Department Faculty of ScienceKing Abdulaziz UniversityJeddah 21589P.O.Box 80203Saudi Arabia Department of Industrial Chemistry and Chemical Engineering Politecnico di MilanoMilano 20133Italy

Copper nanoparticles were prepared by the chemical reduction *** copper particles were embedded into the polyvinylchloride(PVC)matrix as support and used as an electrode(PVC/Cu)for the oxidation of methanol fuel for improving the current *** PVC/Cu electrodes were characterized by thermal gravimetric analysis(TGA)for thermal stability of the electrode,X-ray diffraction(XRD)for identification of copper nanoparticles in the electrode,Fourier transform infrared spectroscopy(FTIR)to identify the interaction between PVC and Cu and scan electron microscopy(SEM)with EDAX for the morphology of the *** electrocatalytic activity of the electrode was characterized by the cyclic voltammetry,linear sweep voltammetry,and chronoamperometry *** increase in the electrode activity was observed with the increase of copper quantity from 0.18 g(PVC/Cu-0.18 g)to 0.24 g(PVC/Cu-0.24 g)and the maximum was found at 0.24 g of copper in the ***,it was observed that the electrode achieved the maximum catalytic current in 0.5 mol/L CH3OH+1 mol/L Na OH *** identified that water molecules,C—H group,copper nanoparticle and its oxide were available in the *** images with EDAX showed that copper particles were properly embedded in the polyvinylchloride matrix.

关键词： copper nanoparticles polyvinylchloride direct methanol fuel cell electrochemical methods