Matches in SemOpenAlex for { <https://semopenalex.org/work/W4226368412> ?p ?o ?g. }
Showing items 1 to 76 of
76
with 100 items per page.
- W4226368412 abstract "The combination of operando small- and wide-angle X-ray scattering (SAXS, WAXS) is here presented to provide insights into the changes in mean particle sizes and phase fractions in fuel cell catalyst layers during accelerated stress tests (ASTs). As fuel cell catalyst, a bimodal Pt/C catalyst was chosen that consists of two distinguishable particle size populations. The presence of the two different sizes should favor and uncover electrochemical Ostwald ripening as degradation mechanism, i.e., the growth of larger particles in the Pt/C catalyst at the expense of the smaller particles via the formation of ionic metal species. However, instead of electrochemical Ostwald ripening, the results point toward classical Ostwald ripening via the local diffusion of metal atoms on the support. Furthermore, the grazing incidence mode provides insights into the catalyst layer depth-dependent degradation. While the larger particles show the same particle size changes close to the electrolyte-catalyst interface and within the catalyst layer, the smaller Pt nanoparticles exhibit a slightly decreased size at the electrolyte-catalyst interface. During the AST, both size populations increase in size, independent of the depth. Their phase fraction, i.e., the ratio of smaller to larger size population, however, exhibits a depth-dependent behavior. While at the electrolyte-catalyst interface the phase fraction of the smaller size population decreases, it increases in the inner catalyst layer. The results of a depth-dependent degradation suggest that employing a depth-dependent catalyst design can be used for future improvement of catalyst stability." @default.
- W4226368412 created "2022-05-05" @default.
- W4226368412 creator A5014725909 @default.
- W4226368412 creator A5015807703 @default.
- W4226368412 creator A5030228814 @default.
- W4226368412 creator A5043738774 @default.
- W4226368412 creator A5044427661 @default.
- W4226368412 creator A5064384920 @default.
- W4226368412 creator A5071242968 @default.
- W4226368412 creator A5091793009 @default.
- W4226368412 date "2021-12-14" @default.
- W4226368412 modified "2023-09-25" @default.
- W4226368412 title "Tracking the Catalyst Layer Depth-Dependent Electrochemical Degradation of a Bimodal Pt/C Fuel Cell Catalyst: A Combined Operando Small- and Wide-Angle X-Ray Scattering Study" @default.
- W4226368412 doi "https://doi.org/10.26434/chemrxiv-2021-55g6z-v2" @default.
- W4226368412 hasPublicationYear "2021" @default.
- W4226368412 type Work @default.
- W4226368412 citedByCount "0" @default.
- W4226368412 crossrefType "posted-content" @default.
- W4226368412 hasAuthorship W4226368412A5014725909 @default.
- W4226368412 hasAuthorship W4226368412A5015807703 @default.
- W4226368412 hasAuthorship W4226368412A5030228814 @default.
- W4226368412 hasAuthorship W4226368412A5043738774 @default.
- W4226368412 hasAuthorship W4226368412A5044427661 @default.
- W4226368412 hasAuthorship W4226368412A5064384920 @default.
- W4226368412 hasAuthorship W4226368412A5071242968 @default.
- W4226368412 hasAuthorship W4226368412A5091793009 @default.
- W4226368412 hasBestOaLocation W42263684122 @default.
- W4226368412 hasConcept C111368507 @default.
- W4226368412 hasConcept C127313418 @default.
- W4226368412 hasConcept C127413603 @default.
- W4226368412 hasConcept C147789679 @default.
- W4226368412 hasConcept C161790260 @default.
- W4226368412 hasConcept C171250308 @default.
- W4226368412 hasConcept C17525397 @default.
- W4226368412 hasConcept C178790620 @default.
- W4226368412 hasConcept C185592680 @default.
- W4226368412 hasConcept C187530423 @default.
- W4226368412 hasConcept C192562407 @default.
- W4226368412 hasConcept C2778517922 @default.
- W4226368412 hasConcept C42360764 @default.
- W4226368412 hasConcept C52859227 @default.
- W4226368412 hasConcept C62129180 @default.
- W4226368412 hasConcept C68801617 @default.
- W4226368412 hasConceptScore W4226368412C111368507 @default.
- W4226368412 hasConceptScore W4226368412C127313418 @default.
- W4226368412 hasConceptScore W4226368412C127413603 @default.
- W4226368412 hasConceptScore W4226368412C147789679 @default.
- W4226368412 hasConceptScore W4226368412C161790260 @default.
- W4226368412 hasConceptScore W4226368412C171250308 @default.
- W4226368412 hasConceptScore W4226368412C17525397 @default.
- W4226368412 hasConceptScore W4226368412C178790620 @default.
- W4226368412 hasConceptScore W4226368412C185592680 @default.
- W4226368412 hasConceptScore W4226368412C187530423 @default.
- W4226368412 hasConceptScore W4226368412C192562407 @default.
- W4226368412 hasConceptScore W4226368412C2778517922 @default.
- W4226368412 hasConceptScore W4226368412C42360764 @default.
- W4226368412 hasConceptScore W4226368412C52859227 @default.
- W4226368412 hasConceptScore W4226368412C62129180 @default.
- W4226368412 hasConceptScore W4226368412C68801617 @default.
- W4226368412 hasLocation W42263684121 @default.
- W4226368412 hasLocation W42263684122 @default.
- W4226368412 hasOpenAccess W4226368412 @default.
- W4226368412 hasPrimaryLocation W42263684121 @default.
- W4226368412 hasRelatedWork W1987321270 @default.
- W4226368412 hasRelatedWork W1997335536 @default.
- W4226368412 hasRelatedWork W2003793415 @default.
- W4226368412 hasRelatedWork W2053499275 @default.
- W4226368412 hasRelatedWork W2083396657 @default.
- W4226368412 hasRelatedWork W2460265184 @default.
- W4226368412 hasRelatedWork W2919021737 @default.
- W4226368412 hasRelatedWork W3031953045 @default.
- W4226368412 hasRelatedWork W616721771 @default.
- W4226368412 hasRelatedWork W1979159380 @default.
- W4226368412 isParatext "false" @default.
- W4226368412 isRetracted "false" @default.
- W4226368412 workType "article" @default.