Ordered mesoporous carbons (OMC) as supports of electrocatalysts for direct methanol fuel cells (DMFC): Effect of carbon precursors of OMC on DMFC performances

High Performance Membrane Electrode Assemblies by Optimization of Processes and Supported Catalysts

“…For the OMC, the TEM image display that the pores and the walls of OMS are inverted to the carbon-nanorod and mesopore of OMC, respectively. The low angle X-ray diffraction (XRD) patterns (refer to Joo et al, 2006) of OMS and OMC showed three, well resolved peaks corresponding to (1 0 0), (1 1 0) and (2 0 0) diffractions of hexagonal p6mm symmetry. The unit cell dimension of OMS and OMC, estimated from the (1 0 0) diffraction was 12.0 and 11.0 nm, respectively.…”

“…The OMC has a slightly compressed unit cell because of the structural shrinkage of carbon frameworks during the high temperature carbonization (Jun et al, 2000). The pore structures of OMS and OMC were further characterized by using the nitrogen adsorption and desorption isotherms (Joo et al, 2006). The corresponding pore size distribution estimated from the adsorption branch by BJH method for OMS and OMC samples.…”

Electrodeposition Fabrication of Pd Nanoparticles on Glassy Carbon Electrode Towards Methanol Oxidation Application

“…On the other hand, catalyst support is considered as an important factor that influences its activity. Researchers have found that carbon materials can improve the activity and stability of the catalysts employed in fuel cells (Yoo et al, 2008;Bessel et al, 2001;Joo et al, 2006;Bang et al, 2007;Xu et al, 2008;Zhao et al, 2010;Serp et al, 2003;Dong et al, 2010). However, above methods have their inherent drawbacks, such as the pre-synthesis of nanoparticles of catalysts and the modification of both the carbon substrates and the nanoparticles to effectively immobilize the nanoparticles on the substrates.…”

Mechanochemical synthesis of carbon-based nanocomposites for supercapacitors

“…The specific capacitance of the electrode material of the Electrochemical Double Layer Capacitors (EDLC) is known to depend on the specific surface area (S s ) and the pore structure [7]. Highly porous carbon materials with high content of mesopores may be obtained from different templates, like metal carbides (by metal etching), various polymers (obtained from micelle solutions followed by carbonization and activation), mesoporous silica or mesoporous molecular sieves, such as MCM-41, MCM-48, SBA-15 [7][8][9][10][11][12][13][14] and some other templates [15]. Nevertheless, as a rule, such materials do not fit with requirements of commercial applications because of their complicated preparation techniques and a relatively high cost [16].…”