Atomistic Insights into the Stability of Pt Single-Atom Electrocatalysts
Florian Speck, Michael T. Y. Paul, Francisco Ruiz‐Zepeda, Matija Gatalo, Haesol Kim, Han Chang Kwon, Karl J. J. Mayrhofer, Minkee Choi, Chang Hyuck Choi, Nejc Hodnik, Serhiy Cherevko
Abstract
, however, the dissolution profiles of Pt SACs and Pt/C become similar. IL-TEM and XPS show that this transition is due to morphological and chemical changes caused by cycling. The latter, in turn, is a consequence of the relatively poor stability of S ligands. As monitored by online ICP-MS and XPS, significant amounts of sulfur leave the catalyst during oxidation. Hence, in case catalysts with improved stability in the anodic potential region are desired, more robust supports and ligands must be developed.
Topics & Concepts
X-ray photoelectron spectroscopyChemistryDissolutionCatalysisTransition metalTransmission electron microscopyInductively coupled plasma mass spectrometryCarbon fibersMetalNanotechnologyChemical engineeringMass spectrometryCrystallographyPhysical chemistryMaterials scienceOrganic chemistryChromatographyComposite materialEngineeringComposite numberElectrocatalysts for Energy ConversionCatalytic Processes in Materials ScienceAdvanced Photocatalysis Techniques