Pt-Decorated TiO2 Materials Supported on Carbon: Increasing Activities and Stabilities toward the ORR by Tuning the Pt Loading

• DOI: 10.1021/acsaem.9b00879
• Publication Date: 2019-07-16T14:25:43Z
• Authors: Eduardo C. M. Bar...; Luanna S. Parreira; Isabel C. de Freitas; Luci R. Aveiro; Daniela C. de Oli...; Mauro C. dos Santos; Pedro H. C. Camargo
• Keywords: Carbon fibers

Pt nanoparticles (Pt NPs) supported on carbon have been widely employed as electrocatalysts toward oxygen reduction reaction. The development of more efficient that enable one to reduce or even not require the use is a central challenge. In addition control over physical and chemical features NPs, metal–support interactions can be enhance activities via generation exposure surface-active sites. this context, we report herein composed NPs TiO2 microspheres, were subsequently impregnated onto carbon. We found that, by optimizing loading at surface, electrocatalytic activity ORR could improved compared commercial Pt/C (E-TEK) material, lower loadings. enhancement in assigned balance between reactive surface sites, such adsorbed oxygenated species. Moreover, utilization support enabled stabilities relative (E-TEK). believe results described may inspire for with stabilities.