20.500.12556/RUL-156285 Towards improved online dissolution evaluation of Pt-alloy PEMFC electrocatalysts via electrochemical flow cell - ICP-MS setup upgrades Electrochemical flow cell coupled with an inductively coupled plasma mass spectrometer (EFC-ICP-MS) is a powerful electroanalytical technique to monitor in-situ dissolution of metallic electrocatalysts and to understand mechanism of degradation under operating conditions. Its utilisation has witnessed a notable increase in the electrocatalyst field in the last decade where it has been extensively used to study the stability of platinum group metals (PGMs) under oxygen reduction and oxygen evolution reaction conditions. Online ICP-MS has allowed the scientific and industrial community to optimise the activity and stability of PGMs thanks to a better understanding of the complex metal corrosion processes. Among the different setups, the electrochemical flow cell design is the most common as it is based on a commercially available design. Nonetheless, besides different materials and different electrochemical protocols, the impact of the geometry and various parameters of the setup on the recorded dissolution signal has not been studied until now. Such parameters can influence the results obtained with an EFC-ICP-MS and thus the interpretation of the dissolution mechanism and/or stability assessment. Hereby, we demonstrate that the length of the tubing between the outlet of the cell and the inlet of the ICP-MS impacts the resolution of the PtCo catalyst dissolution peaks. This, in turn, facilitates studies where the detection of extremely low concentrations is necessary, such as under a very narrow potential window. Similarly, a reduced internal volume of the cell restricts Pt redeposition, contributing to a more precise evaluation of stability. These claims were supported by dynamic continuum mechanics modelling of the ion concentration in a model EFC. Finally, we provide guidelines and advice to properly measure dissolution with an electrochemical cell coupled with ICP-MS. fuel cell catalyst Pt-alloys dissolution online-ICP-MS electrocatalysis flow injection analysis elektrokemija platina gorivne celice elektrokatalizatorji true false true Angleški jezik Slovenski jezik Članek v reviji 2024-05-17 09:07:51 2024-05-17 09:07:52 2024-06-13 13:20:26 0000-00-00 00:00:00 2024 0 0 12 str. art. 144200 Vol. 487 20 May 2024 0000-00-00 Zaloznikova Objavljeno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 544.5/.6 1873-3859 10.1016/j.electacta.2024.144200 194167299 1-s2.0-S0013468624004420-main.pdf 1-s2.0-S0013468624004420-main.pdf 1 6C7CD1DCCFE8827C10E165C33619F53E f988e2bddbf4783a280413710a671cf58e63b1ef613e449514227cebe0ded8ab 7d458e3f-141c-11ef-832b-0050569b8976 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=183666 https://www.sciencedirect.com/science/article/pii/S0013468624004420 1 2df78ef2-141c-11ef-832b-0050569b8976 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=183665 Fakulteta za kemijo in kemijsko tehnologijo 0 0 0