FRINK Linked Data Fragments server

Matches in SemOpenAlex for { <https://semopenalex.org/work/W4286111146> ?p ?o ?g. }

• W4286111146 abstract "Despite many theoretical and experimental efforts to find active catalysts in oxygen evolution reaction (OER), the mechanism for high activity and long-term OER stability remains elusive. Catalyst-electrolyte interface governs the OER activity and stability by forming catalytically active or inactive phase, cation leaching, surface reconstruction, decomposition, formation of the amorphous layer, and agglomeration1. Direct observation of atomic dynamics at catalyst-H2O interface under OER conditions may significantly advance the mechanistic understanding of the complex OER mechanism. This work utilizes an environmental transmission electron microscope (ETEM) technique to visualize real-time imaging of atomic dynamics, structural changes, and discrepancies in a lifetime at the perovskite catalyst-H2O interface. The ETEM approach is applied on (001) surface of La0.6Sr0.4MnO3 (LSMO), Pr(1-x)Ca(x)MnO3 (PCMO) (x= 0.1 and 0.33) and La0.6Sr0.4CoO3 (LSCO) perovskite oxides, respectively. Furthermore, Monte–Carlo-based least-squares optimization simulated images based on the multislice method is used to interprete the atomic contrast, in particular surface termination, and adatom occupancies at the catalyst surface. Here I report the atomic dynamics of highly mobile manganese (Mn) adatoms at single-crystalline Lanthanum (La)/ Strontium (Sr) terminated (001) surface of LSMO and irreversible Mn leaching at the mixed terminated (001) surface of PCMO (x=0.33) manganites2. Furthermore, I discuss the dynamic processes at the LSCO-H2O interface associated with the formation of a disordered surface layer that governs the OER stability. These results provide key findings of highly mobile transition metal Mn and Cobalt (Co) adatoms on (001) surfaces of LSMO and LSCO, respectively. In the case of LSMO, ETEM observations suggests the partially solvated Mn adatoms in H2O act as an active catalytic site due to flexible coordination of Mn. In contrast, partially solvated Co adatoms are highly mobile in the low partial pressure of H2O, whereas in high partial pressure of H2O, the LSCO surface shows a transformation to a disordered layer. This is in coincidence with deactivating OER activity in high current densities and potential in electrochemical experiments. ETEM investigations also suggest that the change of TM valence and TM-O covalency governs the change of OER activity and stability of PCMO for the x=0.1 and 0.33 systems. Besides a detailed investigation of the atomic dynamic, these results demonstrate a powerful strategy of combining real electrochemistry and ETEM to develop a fundamental understanding of OER catalysts. References 1. Liu, Y. et al. Corrosion engineering towards efficient oxygen evolution electrodes with stable catalytic activity for over 6000 hours. Nat. Commun. 9, (2018). 2. Lole, G. et al. Dynamic observation of manganese adatom mobility at perovskite oxide catalyst interfaces with water. Commun. Mater. 1, 68 (2020)." @default.
• W4286111146 created "2022-07-21" @default.
• W4286111146 creator A5037154426 @default.
• W4286111146 date "2022-07-21" @default.
• W4286111146 modified "2023-09-28" @default.
• W4286111146 title "In-situ Environmental Transmission Electron Microscopy Investigation of Perovskite Oxide Thin Films During Electrochemical Oxygen Evolution Reaction." @default.
• W4286111146 doi "https://doi.org/10.53846/goediss-9364" @default.
• W4286111146 hasPublicationYear "2022" @default.
• W4286111146 type Work @default.
• W4286111146 citedByCount "0" @default.
• W4286111146 crossrefType "dissertation" @default.
• W4286111146 hasAuthorship W4286111146A5037154426 @default.
• W4286111146 hasBestOaLocation W42861111461 @default.
• W4286111146 hasConcept C106773901 @default.
• W4286111146 hasConcept C127413603 @default.
• W4286111146 hasConcept C135473242 @default.
• W4286111146 hasConcept C146088050 @default.
• W4286111146 hasConcept C147789679 @default.
• W4286111146 hasConcept C155011858 @default.
• W4286111146 hasConcept C159467904 @default.
• W4286111146 hasConcept C161368742 @default.
• W4286111146 hasConcept C161790260 @default.
• W4286111146 hasConcept C171250308 @default.
• W4286111146 hasConcept C17525397 @default.
• W4286111146 hasConcept C185592680 @default.
• W4286111146 hasConcept C191897082 @default.
• W4286111146 hasConcept C192562407 @default.
• W4286111146 hasConcept C193016168 @default.
• W4286111146 hasConcept C2779851234 @default.
• W4286111146 hasConcept C42360764 @default.
• W4286111146 hasConcept C52859227 @default.
• W4286111146 hasConcept C55493867 @default.
• W4286111146 hasConcept C56052488 @default.
• W4286111146 hasConcept C8010536 @default.
• W4286111146 hasConceptScore W4286111146C106773901 @default.
• W4286111146 hasConceptScore W4286111146C127413603 @default.
• W4286111146 hasConceptScore W4286111146C135473242 @default.
• W4286111146 hasConceptScore W4286111146C146088050 @default.
• W4286111146 hasConceptScore W4286111146C147789679 @default.
• W4286111146 hasConceptScore W4286111146C155011858 @default.
• W4286111146 hasConceptScore W4286111146C159467904 @default.
• W4286111146 hasConceptScore W4286111146C161368742 @default.
• W4286111146 hasConceptScore W4286111146C161790260 @default.
• W4286111146 hasConceptScore W4286111146C171250308 @default.
• W4286111146 hasConceptScore W4286111146C17525397 @default.
• W4286111146 hasConceptScore W4286111146C185592680 @default.
• W4286111146 hasConceptScore W4286111146C191897082 @default.
• W4286111146 hasConceptScore W4286111146C192562407 @default.
• W4286111146 hasConceptScore W4286111146C193016168 @default.
• W4286111146 hasConceptScore W4286111146C2779851234 @default.
• W4286111146 hasConceptScore W4286111146C42360764 @default.
• W4286111146 hasConceptScore W4286111146C52859227 @default.
• W4286111146 hasConceptScore W4286111146C55493867 @default.
• W4286111146 hasConceptScore W4286111146C56052488 @default.
• W4286111146 hasConceptScore W4286111146C8010536 @default.
• W4286111146 hasLocation W42861111461 @default.
• W4286111146 hasOpenAccess W4286111146 @default.
• W4286111146 hasPrimaryLocation W42861111461 @default.
• W4286111146 hasRelatedWork W10704559 @default.
• W4286111146 hasRelatedWork W41557910 @default.
• W4286111146 hasRelatedWork W41893443 @default.
• W4286111146 hasRelatedWork W45875025 @default.
• W4286111146 hasRelatedWork W46399375 @default.
• W4286111146 hasRelatedWork W4979383 @default.
• W4286111146 hasRelatedWork W49890275 @default.
• W4286111146 hasRelatedWork W5122666 @default.
• W4286111146 hasRelatedWork W5584817 @default.
• W4286111146 hasRelatedWork W7559726 @default.
• W4286111146 isParatext "false" @default.
• W4286111146 isRetracted "false" @default.
• W4286111146 workType "dissertation" @default.