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Autor(en): Liu, Hang
Wang, Hongguang
Song, Qian
Küster, Kathrin
Starke, Ulrich
van Aken, Peter A.
Klemm, Elias
Titel: Assembling metal organic layer composites for high‐performance electrocatalytic CO2 reduction to formate
Erscheinungsdatum: 2022
Dokumentart: Zeitschriftenartikel
Seiten: 6
Erschienen in: Angewandte Chemie international edition 61 (2022), No. e202117058
URI: http://nbn-resolving.de/urn:nbn:de:bsz:93-opus-ds-135906
http://elib.uni-stuttgart.de/handle/11682/13590
http://dx.doi.org/10.18419/opus-13571
ISSN: 1433-7851
1521-3773
Zusammenfassung: 2D metal-organic-framework (MOF) based composites have emerged as promising candidates for electrocatalysis due to their high structural flexibility and fully exposed active sites. Herein, a freestanding metal-organic layer (MOL) with a 2D kgd (kagome dual) lattice was constructed with abundant surface oxygenate groups serving as anchoring sites to immobilize diverse guests. Taking Bi as an example, tetragonal Bi2O3 nanowires can be uniformly grown on MOLs after solvothermal treatment, the structural evolution of which was followed by ex situ electron microscopy. The as-prepared Bi2O3/MOL exhibits excellent CO2 electroreduction activity towards formate reaching a specific current of 2.3 A mgBi−1 and Faradaic efficiencies of over 85 % with a wide potential range from -0.87 to -1.17 V, far surpassing Bi2O3/UiO (a 3D Zr6-oxo based MOF) and Bi2O3/AB (Acetylene Black). Such a post-synthetic modification strategy can be flexibly extended to develop versatile MOL composites, highlighting the superiority of optimizing MOL-based composites for electrocatalysis.
Enthalten in den Sammlungen:03 Fakultät Chemie

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