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Yuu Takeuchi, Keita Watanabe, Koichi Matsuzawa, Takaaki Nagai, Kaoru Ikegami, Ryuji Monden, Akimitsu Ishihara, Enhancement of Oxygen Reduction Activity of Fe-added Zirconium Oxide Electrocatalysts without Conductive Supports in Sulfuric Acid, Chemistry Letters, Volume 51, Issue 9, September 2022, Pages 927–931, https://doi.org/10.1246/cl.220283
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Abstract
Fe-added zirconium oxide electrocatalyst was synthesized using pyrazine carboxylic acid for catalyzing oxygen reduction reactions (ORR) in acidic media. The optimization of the Fe-additive ratio led to the highest onset potential of 0.917 V for ORR at −10 mA gcat−1 compared to that of previous studies. The high ORR activity was due to the formation of high-quality active sites with Fe addition in monoclinic ZrO2 and a suitable electron supply path created through carbon deposited using a pyrazine carboxylic acid complex.