Journal article
Two-Dimensional Conductive Ni-HAB as a Catalyst for the Electrochemical Oxygen Reduction Reaction
Catalytic systems whose properties can be systematically tuned via changes in synthesis conditions are highly desirable for the next-generation catalyst design and optimization. Herein, we present a two-dimensional (2D) conductive metal-organic framework consisting of M-N4 units (M = Ni, Cu) and a hexaaminobenzene (HAB) linker as a catalyst for the oxygen reduction reaction.
By varying synthetic conditions, we prepared two Ni-HAB catalysts with different crystallinities, resulting in catalytic systems with different electric conductivities, electrochemical activity, and stability. We show that crystallinity has a positive impact on conductivity and demonstrate that this improved crystallinity/conductivity improves the catalytic performance of our model system.
Additionally, density functional theory simulations were performed to probe the origin of M-HAB's catalytic activity, and they suggest that M-HAB's organic linker acts as the active site with the role of the metal being to modulate the linker sites' binding strength.
Language: | English |
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Publisher: | American Chemical Society |
Year: | 2020 |
Pages: | 39074-39081 |
ISSN: | 19448252 and 19448244 |
Types: | Journal article |
DOI: | 10.1021/acsami.0c09323 |
ORCIDs: | Nørskov, Jens K. , 0000-0002-8644-2103 , 0000-0001-5047-2530 , 0000-0001-9900-0622 and 0000-0002-0972-1715 |