Substrate-Assisted Atomic Dispersion of Cobalt for Alkaline Water Electrolysis
Atomically dispersed single-atom catalysts have recently attracted broad research interest due to their high atom efficiency and unique catalytic performance. In this study, atomic dispersion of cobalt is achieved using a chemical bath deposition method on a highly stable alkali titanate film (Ti/KTiO). These films were characterized using a variety of techniques, with atomic dispersion confirmed via grazing incidence X-ray absorption spectroscopy and ab initio modeling of single-atom systems. This modeling indicated that the alkali ion incorporated into the film facilitates atomic dispersion. Experimentally, the Ti/KTiO-supported Co(OH)<sub>2</sub> catalysts exhibited remarkable electrochemical performance, with an overpotential of 163 mV to achieve a current density of 10 mA cm<sup>-2</sup> with a catalyst loading of ∼0.1 mg cm<sup>-2</sup> and high stability. These results show the potential of Ti/KTiO/Co(OH)<sub>2</sub> catalysts for atomically efficient hydrogen production.
Authors
- Darren Chow (ORCID: https://orcid.org/0000-0002-7894-5448)
- Cameron McGuire
- Bing−Joe Hwang (ORCID: https://orcid.org/0000-0002-3873-2149)
- Aicheng Chen (ORCID: https://orcid.org/0000-0002-2239-6785)
- Chi-Kai Hung (ORCID: https://orcid.org/0000-0003-0065-092X)
- Wei‐Hsiang Huang (ORCID: https://orcid.org/0000-0001-9503-0373)
- Jonathan Quintal
- De-Tong Jiang
- Tony Shi (ORCID: https://orcid.org/0009-0009-4760-2635)
Institutions
- National Taiwan University of Science and Technology (TW)
- National Synchrotron Radiation Research Center (TW)
- University of Guelph (CA)
Publication Details
- Journal
- The Journal of Physical Chemistry Letters
- Published
- 2024-09-03
- DOI
- https://doi.org/10.1021/acs.jpclett.4c02297
- Primary Topic
- Electrocatalysts for Energy Conversion
- Type
- article
- Field-Weighted Citation Impact
- 0.00
Funders
- Canada Foundation for Innovation
- Natural Sciences and Engineering Research Council of Canada