Materials for Energy
Graphene Based Catalysts and Electrodes for Fuel Cells
Mixed Cation- and Anion-Exchange Hybrid Membranes for Fuel Cell Applications
Bipolar membrane fuel cells (BPMFCs) can self-humidify to ensure high ionic conductivity and allow the use of non-Pt catalysts. This novel membrane electrode assembly (MEA) represents bipolar (hybrid) membranes composing of both cation (proton) and anion exchange membranes laminated together. Self-humidification is created at the bipolar membrane interface. Anion exchange membranes are the most critical components of a bipolar membrane. Hence, in addition to proton exchange membranes, we report on the design and development of crosslinked anion exchange membranes (AEMs) which are synthesized by radiation grafting and subsequent functionalization (amination and crosslinking). The aim is to verify one-step synthesis of crosslinked AEM for bipolar membrane fuel cells (BPMFCs).
Graphene nanocomposites have been cited as a promising candidate for energy conversion and storage applications. We focused on the hydrogen adsorption behavior of these nanocomposites at room temperature and low pressures that are relevant for practical on-board storage systems.
- Bajestani, Z.G., Yürüm, A., Yürüm, Y., 2016. Significant improvement in the hydrogen storage capacity of a reduced graphene oxide/TiO2 nanocomposite by chemical bonding of Ti-O-C. RSC Advances 6, 32831-32838.
- Gohari Bajestani, Z., Yürüm, A., Yürüm, Y., 2016. Decoration of graphene sheets with Pd/Al2O3 hybrid particles for hydrogen storage applications. International Journal of Hydrogen Energy 41, 9810-9818.
- Nechaev, Y.S., Filippova, V.P., Tomchuk, A.A., Yürüm, A., Yürüm, Y., Veziroglu, T.N., 2016. On the spillover effect of the solid H2 intercalation into GNF's. Nanosystems: Physics, Chemistry, Mathematics 7, 204-209.
- Nechaev, Y.S., Filippova, V.P., Yürüm, A., Yürüm, Y., Veziroglu, N., 2015. The reversible hydrogenation-dehydrogenation of membrane and epitaxial graphenes. Journal of Chemical Engineering and Chemistry Research 2, 421-456.
- Nechaev, Y. , Yürüm, A. , Tekin, A. , Yavuz, N. , Yürüm, Y. and Veziroglu, T. (2014) Fundamental Open Questions on Engineering of “Super” Hydrogen Sorption in Graphite Nanofibers: Relevance for Clean Energy Applications. American Journal of Analytical Chemistry, 5, 1151-1165.
- Yürüm, Y., Taralp, A., Veziroglu, T.N., 2009. Storage of hydrogen in nanostructured carbon materials. International Journal of Hydrogen Energy 34, 3784-3798.
MCM-41, a mesoporous silica material has been also considered for hydrogen storage due to its high surface area, uniform pore size and good adsorption properties.To improve the hydrogen storage capacity of the pure MCM-41, samples were loaded with Pd that is known with its affinity to hydrogen.
- Dündar-Tekkaya, E., Yürüm, Y., 2016a. Mesoporous MCM-41 material for hydrogen storage: A short review. International Journal of Hydrogen Energy 41, 9789-9795.
- Dündar-Tekkaya, E., Yürüm, Y., 2016b. Synthesis of palladium incorporated MCM-41 via microwave irradiation and investigation of its hydrogen storage properties. International Journal of Hydrogen Energy 41, 9828-9833.
- Dündar-Tekkaya, E., Yürüm, Y., 2015. Effect of loading bimetallic mixture of Ni and Pd on hydrogen storage capacity of MCM-41. International Journal of Hydrogen Energy 40, 7636-7643.
- Ergün, A.N., Kocabaş, Z.Ö., Yürüm, A., Yürüm, Y., 2014. Diffusion of alcohols and aromatics in a mesoporous MCM-41 material. Fluid Phase Equilibria 382, 169-179.
- Fakioğlu, E., Yürüm, Y., Nejat Veziroğlu, T., 2004. A review of hydrogen storage systems based on boron and its compounds. International Journal of Hydrogen Energy 29, 1371-1376.
Biomass is a sustainable energy source therefore reasearch about extracting raw materials and energy from fast growing plants like grass by thermal and catalytic methods has a significant potential to aid economic and environmental progress.
- Baysal, M., Yürüm, Y., 2016. Characterization of bio-oils and bio-char obtained from the pyrolysis of a mixture of Loliumperenne, Festucaovina, Festucarubra and Poapratensis grasses. Biofuels 7, 181-189.
- Bakisgan, C., Dumanli, A.G., Yürüm, Y., 2009. Trace elements in Turkish biomass fuels: Ashes of wheat straw, olive bagasse and hazelnut shell. Fuel 88, 1842-1851.