Electrochemical dissolution of PtRu/C: Effect of potential, fuels, and temperature

• DOI: 10.1016/j.electacta.2024.144764
• Publication Date: 2024-07-28T21:46:26Z
• Authors: Mária Minichová; Tatiana Priamushko; Andreas Hutzler; Tomáš Hrbek; Ivan Khalakhan; Karl J.J. Mayrhofer; Serhiy Cherevko
• Keywords: info:eu-repo/classification/ddc/540; 540

Over the last decade, in situ or online inductively coupled plasma mass spectrometry (ICP-MS) has been established as a powerful tool for time- and potential-resolved assessment of electrocatalyst dissolution stability. On other hand, much more accessible practical realization ex ICP-MS studies three-electrode cells are not commonly carried out. Still, they can offer valuable insights into catalyst degradation during prolonged accelerated stress tests, thus complementing measurements. This work presents an example how both techniques be used jointly to study effect potential, fuels (isopropanol glycerol), temperature on PtRu/C dissolution. is chosen its potential use fuel electrosynthesis. Ru significantly less noble metal, so it anticipated dissolve preferentially, resulting loss electrocatalyst's functionality. Elucidating light behavior environment's role help develop mitigating strategies minimize such degradation. Our reveals that significant metals. contrary, only affect dissolution, with trends varying depending fuel. Temperature again affects stability metals, increasing Pt temperature. In case Ru, however, certain conditions, metal decreases at elevated Two additional complementary surface-sensitive techniques, i.e., Cu underpotential deposition transmission electron microscopy, were investigate change their surface concentration. The finding opens possibility lifetime prolonging applications where reaches up 1.0 VRHE.