Efficient chitosan/nitrogen-doped reduced graphene oxide composite membranes for direct alkaline ethanol fuel cellsGorgieva, Selestina (Avtor) Osmić, Azra (Avtor) Hribernik, Silvo (Avtor) Božič, Mojca (Avtor) Svete, Jurij (Avtor) Hacker, Viktor (Avtor) Wolf, Sigrid (Avtor) Genorio, Boštjan (Avtor) chitosannitrogen-doped reduced graphene oxideanion-exchange membranedirect alkaline ethanol fuel cellHerein, we prepared a series of nanocomposite membranes based on chitosan (CS) and three compositionally and structurally different N-doped graphene derivatives. Two-dimensional (2D) and quasi 1D N-doped reduced graphene oxides (N-rGO) and nanoribbons (N-rGONRs), as well as 3D porous N-doped graphitic polyenaminone particles (N-pEAO), were synthesized and characterized fully to confirm their graphitic structure, morphology, and nitrogen (pyridinic, pyrrolic, and quaternary or graphitic) group contents. The largest (0.07%) loading of N-doped graphene derivatives impacted the morphology of the CS membrane significantly, reducing the crystallinity, tensile properties, and the KOH uptake, and increasing (by almost 10-fold) the ethanol permeability. Within direct alkaline ethanol test cells, it was found that CS/N rGONRs (0.07 %) membrane (P$_{max}$. = 3.7 mWcm$^{−2}$) outperformed the pristine CS membrane significantly (P$_{max}$. = 2.2 mWcm$^{−2}$), suggesting the potential of the newly proposed membranes for application in direct ethanol fuel cells.20212022-02-17 09:43:32Članek v reviji135009UDK: 543.2:66ISSN pri članku: 1422-0067DOI: 10.3390/ijms22041740COBISS_ID: 50761731sl