Proceedings of MATSUS Spring 2025 Conference (MATSUSSpring25)
DOI: https://doi.org/10.29363/nanoge.matsusspring.2025.500
Publication date: 16th December 2024
Electrocatalysts is essential for the commercilization of fuel cells. Currently, Pt is the key element on both anode and cathode. Since Pt is costly and scarce, it poses a question of how to lower the Pt loading and increase the efficiency. Most of previous studies focused on Pt alloyed with some 3d-transition metals, such as Fe, Co, Ni, etc. However, the activity and stability are not good enough for fuel cell applications. Recently, ordered intermetallic nanoparticles have attracted some attention, since the ordered intermetallic phase provides definite composition and structure. They can provide predictable controls over structural, geometric, and electronic effects, which are not afforded by alloys. However, previous reports on ordered intermetallic are mainly used as anode catalysts, such as formic acid oxidation. And the synthesis procedure is very complex. More importantly, the particles are unsupported and it is not easy to clean the particle surface. In our studies, we present that carbon supported ordered intermetallic nanoparticles can be easily formed using a simple impregnation-reduction method followed by high temperature pretreatment. Besides, by selecting special 3d-transition metals, Pd-based ordered intermetallics can also be formed. When used as electrocatalysts for fuel cells, the ordered imtermetallics exhibit both the enhanced activities and stabilties.