Facile Synthesis of Highly Active and Stable Pt−
- Facile Synthesis of Highly Active and Stable Pt− Ir/C Electrocatalysts for Oxygen Reduction and Alcohol Oxidation Reaction
- Ir/C Electrocatalysts for Oxygen Reduction and Alcohol Oxidation Reaction
- 황승준; 유성종; 임태훈; 김수길
- Pt− Ir/C; Oxygen Reduction; Alcohol Oxidation
- Issue Date
- 9th Korea-Japan Symposium on Materials & Interface
- , PB04
- A facile synthesis technique has been developed for carbon-supported highly active and stable Pt–Ir electrocatalysts for applications to low-temperature fuel cells. In the surfactant-mediated sodium borohydride reduction method, cetyltrimethyl-ammonium bromide (CTAB) and ethanol were utilized as the surfactant and solvent, respectively. The mass activity for the oxygen reduction reaction (ORR) of the prepared Pt3Ir1 electrocatalyst was 2.4 times higher than that of a commercial Pt/C catalyst, while the ORR durability test showed negligible losses in activity after 3000 potential cycles.
In addition, the prepared Pt3Ir1, Pt1Ir1, and Pt1Ir3 exhibit best activity with different alcohol oxidation reactions using methanol, ethanol, and formic acid respectively, and possess significant CO tolerance property. In this manner, our experiments verify the potential applications of Pt−Ir electrocatalysts as promising candidates not only for liquid fuels but also for the cathode and anode of proton-exchange membrane fuel cells.
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