Fe and Zn Addition Effects of Ti Oxide-Based Electrocatalyst on Catalytic Activity for Oxygen Reduction Reaction

In order to enhance the catalytic activity of non-precious oxide-based electrocatalyst for the oxygen evolution reaction (ORR), we have investigated the addition effects of Zn and Fe for Ti oxide-based electrocatalyst (TiOx) on the catalytic activity for the ORR. The Fe and Zn added TiOx (Fe,Zn-TiOx) was obviously the highest activity for the ORR, and it was higher ORR activity than Fe added TiOx (Fe-TiOx), Zn added TiOx (Zn-TiOx), and TiOx without addition. It reveals that the addition of Fe and Zn was found to be effective for enhancing the ORR activity, and Fe addition was more effective than Zn addition for enhancing the ORR activity on TiOx. As a result, it is suggested that Zn addition affected to increased electrochemical surface area of TiOx, and Fe addition affected to form active site in TiOx as similar case as Zr oxide-based electrocatalyst.