Microkinetic Model to Rationalize the Lifetime of Electrocatalysis: Trade-off between Activity and Stability
Electrocatalysts which can operate for several years are required to produce hydrogen and commodity chemicals in an environmentally friendly manner. However, designing materials with long operational lifetimes is challenging, due to the lack of a conceptual framework to predict catalytic lifetimes quantitatively. Here, we report a microkinetic equation which quantifies the lifetime of an electrocatalyst undergoing dissolution. This equation was obtained by taking advantage of the fact that catalysis is much faster than deactivation, which allows the ordinary differential equations to be solved via the quasi steady-state approximation. All chemical reactions were modeled as irreversible, first-order elementary reactions. Under this assumption, the catalytic rate correlates linearly with the deactivation rate, leading to a trade-off relationship between activity and stability. Our model was supported by the correlation between theoretical and experimental lifetimes (<i>r</i><sup>2</sup> = 0.86) of a manganese oxide electrocatalyst during the oxygen evolution reaction.
Authors
- Ailong Li (ORCID: https://orcid.org/0000-0003-0875-5072)
- Daisuke Hashizume (ORCID: https://orcid.org/0000-0001-7152-4408)
- Hideshi Ooka (ORCID: https://orcid.org/0000-0002-6921-6796)
- Tomoharu Suda (ORCID: https://orcid.org/0000-0002-1027-7842)
- Ryuhei Nakamura (ORCID: https://orcid.org/0000-0003-0743-8534)
- Hirokazu Komatsu (ORCID: https://orcid.org/0000-0001-6249-8308)
- Shuang Kong (ORCID: https://orcid.org/0000-0003-1651-6581)
- Marie E. Wintzer
- Kiyohiro Adachi (ORCID: https://orcid.org/0000-0002-8224-8602)
- Atsushi Mochizuki (ORCID: https://orcid.org/0000-0002-7714-1755)
Institutions
- Tokyo Institute of Technology (JP)
- National Institute of Technology, Toyota College (JP)
- Kyoto University (JP)
- RIKEN Center for Sustainable Resource Science (JP)
- Life Science Institute (JP)
- RIKEN Center for Emergent Matter Science (JP)
Publication Details
- Journal
- The Journal of Physical Chemistry Letters
- Published
- 2024-09-30
- DOI
- https://doi.org/10.1021/acs.jpclett.4c02162
- Citations
- 6
- Primary Topic
- Electrocatalysts for Energy Conversion
- Type
- article
- Field-Weighted Citation Impact
- 0.61
Funders
- Naito Science and Engineering Foundation
- Ministry of Education, Culture, Sports, Science and Technology
- Japan Society for the Promotion of Science
- Fusion Oriented REsearch for disruptive Science and Technology