Plasma-polymerized phosphonic acid-based membranes for fuel cell

Modified graphene-based materials as effective catalysts for transesterification of rapeseed oil to biodiesel fuel

“…Deconvolution of the P 2p region shows four peaks at 132.9 and 132.1 eV, and at 134.5 and 133.5 eV, which correspond to the BEs of P 2p1/2 and P 2p3/2, respectively. All the phosphorus signals can be assigned to the presence of phosphate groups (P-C, P-O-C, and P=O) [41,48], and thus confirm the effectiveness of TRGO modification with H3PO4.…”

“…Moreover, the concentration of these bands slightly increased (Table 4). Both these phenomena can be associated with the presence of S-containing functionalities (in the case of TRGO-H2SO4-20 and TRGO-BDS) or P-containing groups (in the case of TRGO-H3PO4) in the structure of the samples [41][42][43][44]. The S bands in the S 2p region appear in the form of doublets because of the degeneration in the BE of the 2p3/2 and 2p1/2 orbitals.…”

Sorption and permeation of water through Plasma Enhanced Chemical Vapour Deposited phosphonic acid-based membranes

“…Although the preparation of membranes containing phosphonic acid groups has enabled to improve the performance of electrolyte membranes in anhydrous conditions, these membranes still suffer from some limitations such as low mechanical stability and a poorly effective barrier effect on liquids and gases which strongly limit their competitiveness [17]. Therefore, the development of polymer electrolyte membranes that can efficiently conduct protons but block liquids and gases permeation has been envisaged by using Plasma Enhanced Chemical Vapor Deposition (PECVD) [18]. This dry-route synthesis method is considered as a promising way to prepare dense, uniform and mechanically resistant membranes [19,20].…”

“…This dry-route synthesis method is considered as a promising way to prepare dense, uniform and mechanically resistant membranes [19,20]. It has been reported in the literature that electrolyte membranes prepared by PECVD exhibit superior properties, such as higher thermal and chemical stability, lower liquid and gas permeability and higher water retention (with a quite similar protons conduction level) when compared with classical polymer membranes, which provide them with great potential as membranes for PEMECs or PEMFCs applications [15,18]. However PECVD is a very complicated process in terms of synthesis mechanisms which are noticeably influenced by the plasma parameters in the preparation of membranes.…”

Synthesis and Properties of Poly(imides) and Poly(imides)/Ionic Liquid Composites Bearing a Benzimidazole Moiety

“…m PBI also has a high chemical and thermal resistance, with glass transition temperature ( T g ) values close to 450 °C [1,2,3,4,5,6]. The benzimidazole ring has the ability to absorb a large amount of acid when it is doped, thus favoring the formation of ionic clusters for proton transport [7]. These materials been used in Proton Exchange Membrane Fuel Cells (PEMFC), which is one of the most promising alternative power sources for portable uses.…”