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
Graphene Based Electrochemical Sensors and Biosensors: A Review
TL;DR: Graphene has received increasing attention due to its unique physicochemical properties (high surface area, excellent conductivity, high mechanical strength, and ease of functionalization and mass production).
Journal ArticleDOI
A review of anode catalysis in the direct methanol fuel cell
Hansan Liu,Chaojie Song,Lei Zhang,Jiujun Zhang,Haijiang Wang,David P. Wilkinson,David P. Wilkinson +6 more
TL;DR: More than 100 articles related to anode catalysts for the direct methanol fuel cell (DMFC) are reviewed, mainly focusing on the three most active areas: (1) progress in preparation methods of Pt-Ru catalysts with respect to activity improvement and utilization optimization; (2) preparation of novel carbon materials as catalyst supports to create a highly dispersed and stably supported catalysts; (3) exploration of new catalysts having a low noble metal content and non-noble metal elements through fast activity down-selection methods such as combinatorial methods.
Journal ArticleDOI
Graphene−Metal Particle Nanocomposites
TL;DR: In this article, a general approach for the preparation of graphene−metal particle nanocomposites in a water−ethylene glycol system using graphene oxide as a precursor and metal nanoparticles (Au, Pt and Pd) as building blocks.
Journal ArticleDOI
Environmental applications of carbon-based nanomaterials.
TL;DR: This review critically assesses the contributions of carbon-based nanomaterials to a broad range of environmental applications: sorbents, high-flux membranes, depth filters, antimicrobial agents, environmental sensors, renewable energy technologies, and pollution prevention strategies.
Journal ArticleDOI
Carbon Nanomaterials for Advanced Energy Conversion and Storage
TL;DR: Progress in the research and development of carbon nanomaterials during the past twenty years or so for advanced energy conversion and storage is reviewed, along with some discussions on challenges and perspectives in this exciting field.
References
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Journal ArticleDOI
Effect of Methanol Crossover in a Liquid‐Feed Polymer‐Electrolyte Direct Methanol Fuel Cell
TL;DR: In this paper, the performance of a liquid-feed direct methanol fuel cell employing a proton exchange membrane electrolyte with Pt-Ru/C as anode and Pt-C as cathode is reported.
Journal ArticleDOI
Pt−Ru/Carbon Fiber Nanocomposites: Synthesis, Characterization, and Performance as Anode Catalysts of Direct Methanol Fuel Cells. A Search for Exceptional Performance
TL;DR: In this article, the Pt−Ru/narrow tubular herringbone graphitic carbon nanofiber nanocomposite was used as an anode catalyst for direct methanol fuel cell.
Journal ArticleDOI
An XPS study on oxidation states of Pt and its alloys with Co and Cr and its relevance to electroreduction of oxygen
TL;DR: In this article, X-ray photoelectron spectroscopic (XPS) study on carbon-supported Pt, Pt-Co and Pt-Cr electrocatalyst suggests the presence of a relatively lower Pt-oxide content on the alloys.
Journal ArticleDOI
Direct methanol–air fuel cells for road transportation
TL;DR: In this paper, the authors reviewed the history of the direct methanol-air fuel cell and the various problems associated with its commercial development, in particular the mechanisms of the electrode reactions, the development of effective catalysts and the possible electrolytes which can be used.
Journal ArticleDOI
Electrical conductivity of thermal carbon blacks: Influence of surface chemistry
TL;DR: In this article, the electrical conductivity of thermal and conductive carbon blacks with different chemistry was determined by impedance spectroscopy, and the conductivity correlated best with the polyaromatic character of the carbon black surface characterised by the static SIMS spectra.