The development of highly efficient and durable anode materials for ethanol electro-oxidation remains a challenge. Herein, we report the synthesis of Pt 1−x−y Ir x Ni y nanocrystals via one-step procedure by ultrasonic-assisted co-reduction of the metal precursors using ascorbic acid as a mild reducing agent and pluronic F127 as a structure directing agent. The catalytic performance of this ternary catalyst towards electrochemical oxidation of ethanol was examined and compared to its mono and binary Pt counterparts (Pt, Pt 1−x Ir x , and Pt 1−y Ni y ) that are synthesized by the same method. TEM analysis showed a porous nanodendritic structure for the synthesized ternary electrocatalyst with an average size of 20 ± 1 nm. The electrochemical measurements revealed an electrochemically active surface area, ECSA, of 73 m 2 g −1 . The as-synthesized ternary electrocatalyst showed an improved catalytic activity towards ethanol oxidation in 1 M KOH with a measured mass activity of 3.8 A mg −1 which is 1.7, 2.0, and 3.2 times higher than that of Pt 1−x Ir x , Pt 1−y Ni y , and Pt, respectively. Additionally, the Pt 1−x−y Ir x Ni y nanocrystals expressed high poisoning tolerance (j f /j b = 4.5) and high durability compared to its mono and binary counterparts.
Bibliographical noteFunding Information:
This work was made possible by NPRP Grant no. NPRP 7-485-1-091 from the Qatar National Research Fund (a member of the Qatar Foundation). The statements made herein are solely the responsibility of the authors.
- Platinum alloy
- Porous nanodendrites