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| 001 | 891112 | ||
| 005 | 20220930130310.0 | ||
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| 100 | 1 | _ | |a Baeumer, Christoph |0 P:(DE-Juel1)159254 |b 0 |e Corresponding author |
| 245 | _ | _ | |a Tuning electrochemically driven surface transformation in atomically flat LaNiO3 thin films for enhanced water electrolysis |
| 260 | _ | _ | |a Basingstoke |c 2021 |b Nature Publishing Group |
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| 520 | _ | _ | |a Structure–activity relationships built on descriptors of bulk and bulk-terminated surfaces are the basis for the rational design of electrocatalysts. However, electrochemically driven surface transformations complicate the identification of such descriptors. Here we demonstrate how the as-prepared surface composition of (001)-terminated LaNiO3 epitaxial thin films dictates the surface transformation and the electrocatalytic activity for the oxygen evolution reaction. Specifically, the Ni termination (in the as-prepared state) is considerably more active than the La termination, with overpotential differences of up to 150 mV. A combined electrochemical, spectroscopic and density-functional theory investigation suggests that this activity trend originates from a thermodynamically stable, disordered NiO2 surface layer that forms during the operation of Ni-terminated surfaces, which is kinetically inaccessible when starting with a La termination. Our work thus demonstrates the tunability of surface transformation pathways by modifying a single atomic layer at the surface and that active surface phases only develop for select as-synthesized surface terminations. |
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| 773 | _ | _ | |a 10.1038/s41563-020-00877-1 |0 PERI:(DE-600)2088679-2 |p 674–682 |t Nature materials |v 20 |y 2021 |x 1476-4660 |
| 856 | 4 | _ | |u https://juser.fz-juelich.de/record/891112/files/Invoice_2676252838.pdf |
| 856 | 4 | _ | |u https://juser.fz-juelich.de/record/891112/files/LNO_surface_chemistry.pdf |y Published on 2021-01-11. Available in OpenAccess from 2021-07-11. |
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