AI Article Synopsis
- The electrooxidation of 2-propanol to acetone can facilitate a hydrogen economy by using fuel cells and liquid organic hydrogen carriers instead of molecular hydrogen gas.
- Researchers studied the reaction on platinum and platinum-ruthenium catalysts, finding that acetone is the main product with minimal CO formation at higher potentials.
- Key challenges for improving catalyst efficiency include limited operation range, surface poisoning from acetone, and the dissolution of ruthenium atoms from the catalyst surface.
Article Abstract
The selective electrooxidation of 2-propanol to acetone can be used in fuel cells which, when combined with the transfer hydrogenation of acetone from liquid organic hydrogen carriers, will enable the realization of hydrogen economy without using molecular hydrogen gas for storage and transportation. We study the reaction on platinum and platinum-ruthenium nanocatalysts using unique tools for the real-time characterization of reaction and dissolution products. Acetone is the primary product on all investigated catalysts, and only traces of CO form at high potentials. We propose that the reaction occurs on Pt-Ru ensemble sites at low potentials and on Pt-Pt sites at high potentials. Dissolution of surface ruthenium atoms leads to suppression of the process at low overpotential. The main shortcomings to be addressed for an efficient catalyst performance are (a) the narrow potential range in which the bimetallic catalyst is active, (b) the surface poisoning from adsorbed acetone, and (c) the dissolution of ruthenium.
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| http://dx.doi.org/10.1021/acsami.0c07190 | DOI Listing |
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