Browsing by Author "Yagizatli, Y."

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Metal-Free Catalysts for Fuel Cell Applications
(Elsevier, 2022) Ulas, B.; Yagizatli, Y.; Demir-Kivrak, H.
Direct methanol fuel cells (DMFCs) are closer to commercialization than other fuel cells. These energy-conversion systems have extremely high potential, especially for portable devices. But the high cost of these fuel cells is the biggest obstacle to the commercialization of these devices. Many researchers have reported that anode and cathode catalysts account for the highest shares of fuel cell costs. These high costs are mainly driven by the costs of precious metals, which are used as anode and cathode catalysts for fuel cells for their high activity and stability. This chapter examines the preparation, characterization, and performances of platinum-free carbon-based and carbon-based metal-free anode and cathode catalysts for DMFCs. © 2022 Elsevier Inc. All rights reserved.
Oxygen Reduction Reaction; Fuel Cells
(Springer Nature, 2024) Yagizatli, Y.; Acil, G.; Ulas, B.; Demir-Kivrak, H.
The principles of the oxygen reduction reaction (ORR), including elec-trocatalysts and kinetics, are covered in this chapter. Based on the literature, both experimental and theoretical methods are used to explore the ORR kinetics, including reaction processes catalyzed by various electrode materials and catalysts, such as Pt-based alloys, carbon materials, and transition metal macrocyclic complexes. It was emphasized that although there is a large literature on ORR, there is still a need to design materials that can compete with noble metal-containing catalysts for ORR. © The Author(s), under exclusive license to Springer Nature Switzerland AG 2024.