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Tuning electrochemi...
Tuning electrochemically driven surface transformation in atomically flat LaNiO3 thin films for enhanced water electrolysis
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- Baeumer, Christoph (author)
- RWTH Aachen University,Stanford University,Stanford Linear Accelerator Center (SLAC)
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- Li, Jiang (author)
- Stanford Linear Accelerator Center (SLAC)
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- Lu, Qiyang (author)
- Westlake University,Stanford Linear Accelerator Center (SLAC),Advanced Light Source, Berkeley,Stanford University
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- Liang, Allen Yu Lun (author)
- Stanford University,Stanford Linear Accelerator Center (SLAC)
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- Jin, Lei (author)
- Jülich Research Centre
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- Martins, Henrique Perin (author)
- Advanced Light Source, Berkeley
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- Duchoň, Tomáš (author)
- Jülich Research Centre
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- Glöß, Maria (author)
- Jülich Research Centre,Leibniz Institute for Surface Modification
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- Gericke, Sabrina M. (author)
- Lund University,Lunds universitet,Förbränningsfysik,Fysiska institutionen,Institutioner vid LTH,Lunds Tekniska Högskola,Combustion Physics,Department of Physics,Departments at LTH,Faculty of Engineering, LTH,Lawrence Berkeley National Laboratory
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- Wohlgemuth, Marcus A. (author)
- Jülich Research Centre
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- Giesen, Margret (author)
- Jülich Research Centre
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- Penn, Emily E. (author)
- Stanford University
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- Dittmann, Regina (author)
- Jülich Research Centre
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- Gunkel, Felix (author)
- Jülich Research Centre
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- Waser, Rainer (author)
- Jülich Research Centre,RWTH Aachen University
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- Bajdich, Michal (author)
- Stanford Linear Accelerator Center (SLAC)
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- Nemšák, Slavomír (author)
- Advanced Light Source, Berkeley,Jülich Research Centre
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- Mefford, J. Tyler (author)
- Stanford Linear Accelerator Center (SLAC),Stanford University
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- Chueh, William C. (author)
- Stanford University,Stanford Linear Accelerator Center (SLAC)
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(creator_code:org_t)
- 2021-01-11
- 2021
- English 9 s.
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In: Nature Materials. - : Springer Science and Business Media LLC. - 1476-1122 .- 1476-4660. ; 20:5, s. 674-682
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http://dx.doi.org/10...
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Abstract
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- 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.
Subject headings
- NATURVETENSKAP -- Kemi (hsv//swe)
- NATURAL SCIENCES -- Chemical Sciences (hsv//eng)
Publication and Content Type
- art (subject category)
- ref (subject category)
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- By the author/editor
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Baeumer, Christo ...
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Li, Jiang
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Lu, Qiyang
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Liang, Allen Yu ...
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Jin, Lei
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Martins, Henriqu ...
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show more...
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Duchoň, Tomáš
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Glöß, Maria
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Gericke, Sabrina ...
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Wohlgemuth, Marc ...
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Giesen, Margret
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Penn, Emily E.
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Dittmann, Regina
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Gunkel, Felix
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Waser, Rainer
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Bajdich, Michal
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Nemšák, Slavomír
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Mefford, J. Tyle ...
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Chueh, William C ...
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show less...
- About the subject
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- NATURAL SCIENCES
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NATURAL SCIENCES
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and Chemical Science ...
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Nature Materials
- By the university
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Lund University