Journal ArticleDOI
Preparation and Characterization of Multiwalled Carbon Nanotube-Supported Platinum for Cathode Catalysts of Direct Methanol Fuel Cells
TLDR
In this paper, a multiwalled carbon nanotube-supported Pt (Pt/MWNT) nanocomposites were prepared by both the aqueous solution reduction of a Pt salt (HCHO reduction) and the reduction of an ion salt in ethylene glycol solution.Abstract:
Multiwalled carbon nanotube-supported Pt (Pt/MWNT) nanocomposites were prepared by both the aqueous solution reduction of a Pt salt (HCHO reduction) and the reduction of a Pt ion salt in ethylene glycol solution. For comparison, a Pt/XC-72 nanocomposite was also prepared by the EG method. The Pt/MWNT catalyst prepared by the EG method has a high and homogeneous dispersion of spherical Pt metal particles with a narrow particle-size distribution. TEM images show that the Pt particle size is in the range of 2-5 nm with a peak at 2.6 nm, which is consistent with 2.5 nm obtained from the XRD broadening calculation. Surface chemical modifications of MWNTs and water content in EG solvent are found to be the key factors in depositing Pt particles on MWNTs. In the case of the direct methanol fuel cell (DMFC) test, the Pt/MWNT catalyst prepared by EG reduction is slightly superior to the catalyst prepared by aqueous reduction and displays significantly higher performance than the Pt/XC-72 catalyst. These differences in catalytic performance between the MWNT-supported or the carbon black XC-72-supported catalysts are attributed to a greater dispersion of the supported Pt particles when the EG method is used, in contrast to aqueous HCHO reduction and to possible unique structural and higher electrical properties when contrasting MWNTs to carbon black XC-72 as a support.read more
Citations
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Journal ArticleDOI
Pt-implanted indium tin oxide electrodes and their amperometric sensor applications for nitrite and hydrogen peroxide
TL;DR: In this article, a facile ion implantation method was developed to prepare a novel Pt nanoparticles loaded ITO (PtNPs/ITO) electrode, which exhibited excellent electrocatalytic activity, which might be useful in nitrite sensor.
Journal ArticleDOI
Recent advances in hybrid support material for Pt-based electrocatalysts of proton exchange membrane fuel cells
Muhammad Tuoqeer Anwar,Xiaohui Yan,Muhammad Rehman Asghar,Naveed Husnain,Shuiyun Shen,Liuxuan Luo,Junliang Zhang +6 more
Journal ArticleDOI
Electrodeposition of platinum-ruthenium nanoparticles on carbon nanotubes directly grown on carbon cloths for methanol oxidation
TL;DR: The performance of the Pt-Ru catalysts in terms of methanol oxidation efficiency and suppression of carbon monoxide adsorption would be influenced by the concentrations of sulfuric acid, EG, and Ru precursor salt during the electrodeposition processes as discussed by the authors.
Journal ArticleDOI
Ultrasonic synthesis of nitrogen-doped carbon nanofibers as platinum catalyst support for oxygen reduction
Yue Jiang,Jia Zhang,Yuan-Hang Qin,Dongfang Niu,Xinsheng Zhang,Li Niu,Xinggui Zhou,Tianhong Lu,Tianhong Lu,Wei-Kang Yuan +9 more
TL;DR: In this article, the effect of carbon nanofiber (CNF) surface functional groups on the electrocatalytic activities of supported catalysts for oxygen reduction reaction (ORR) is investigated.
Journal ArticleDOI
A highly sensitive electrochemical aptasensor for thrombin detection using functionalized mesoporous silica@multiwalled carbon nanotubes as signal tags and DNAzyme signal amplification
TL;DR: A novel sensitive sandwich-type pseudobienzyme aptasensor for thrombin detection based on mesoporous silica-multiwalled carbon nanotube nanocomposites as enhanced materials and a pseudOBienzyme electrocatalytic system is demonstrated.
References
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TL;DR: A general strategy for the synthesis of highly ordered, rigid arrays of nanoporous carbon having uniform but tunable diameters is described, which gives rise to promising electrocatalytic activity for oxygen reduction and could prove to be practically relevant for fuel-cell technologies.
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Large-Scale Synthesis of Aligned Carbon Nanotubes
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Carbon nanotubule membranes for electrochemical energy storage and production
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