AI Article Synopsis
- Dealloying enhances the electrocatalytic performance of FeCoSiB compounds for hydrogen evolution reactions by increasing the surface area through the formation of nanosheets.
- After 3 hours of dealloying, the overpotential for the optimized NS-FeCoSiB is reduced to 175.1 mV at 1.0 M KOH, outperforming the untreated counterpart (215 mV).
- The study also finds that the hydrogen evolution activity improves significantly with increased cobalt doping, peaking at a 10% Co addition, highlighting the importance of surface activity in catalyst development.
Article Abstract
The electrocatalytic performance of a FeCoSiB Fe-based compounds toward alkaline hydrogen evolution reaction (HER) is enhanced by dealloying. The dealloying process produced a large number of nanosheets on the surface of NS-FeCoSiB, which greatly increased the specific surface area of the electrode. When the dealloying time is 3 h, the overpotential of NS-FeCoSiB is only 175.1 mV at 1.0 M KOH and 10 mA cm, while under the same conditions, the overpotential of FeCoSiB is 215 mV, which is reduced. In addition, dealloying treated electrodes also show better HER performance than un-dealloying treated electrodes. With the increase in Co doping amount, the overpotential of the hydrogen evolution reaction decreases, and the hydrogen evolution activity is the best when the addition amount of Co is 10%. This work not only provides a basic understanding of the relationship between surface activity and the dealloying of HER catalysts, but also paves a new way for doping transition metal elements in Fe-based electrocatalysts working in alkaline media.
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Source |
|---|---|
| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC11397610 | PMC |
| http://dx.doi.org/10.3390/molecules29174130 | DOI Listing |
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