posted on 2024-01-31, 16:36authored byDušan V. Tripković, Dragana L. Milošević, Sanja I. Stevanović, Ksenija Dj. Popović, Vladislava M. Jovanović, Pietro P. Lopes, Pedro F B D Martins, Vojislav R. Stamenković, Dušan Strmčnik
Successful
development of catalysts for electrochemical formic
acid oxidation (FAO) requires finding an optimal balance between catalytic
performance (activity, stability, and selectivity) and catalyst cost.
While platinum is one of the most active catalyst materials for FAO,
it suffers from performance loss at low overpotentials due to poisoning
with CO, which is one of the intermediates formed in the so-called
indirect path of FAO. In this work, we explored the synergistic effects
of the supporting material and annealing temperature on the performance
of Pt thin films for FAO in acidic media. Compared to the as-prepared
Pt films, the annealed films show up to 5-fold and 15-fold improvement
for FAO on Pt@Ni and Pt@Cr, respectively. While the most active Pt@Ni
thin film shows the lowest stability, the most active Pt@Cr thin film
is also the most stable, challenging conventional trade-offs in electrocatalysis
and providing a promising candidate for FAO nanocatalyst synthesis.