AI Article Synopsis
- The Oxygen evolution reaction (OER) is a key challenge in improving alkaline water electrolyzers.
- Researchers studied Au-Fe nanoalloys created through laser-ablation, which incorporate more iron into the gold structure than traditional methods allow.
- These nanoalloys significantly enhance OER activity, achieving up to 20 times higher current density compared to pure metal nanoparticles, highlighting the potential for using such nanoalloys in catalysis and energy conversion.
Article Abstract
Oxygen evolution reaction (OER) is the most critical step in water splitting, still limiting the development of efficient alkaline water electrolyzers. Here we investigate the OER activity of Au-Fe nanoalloys obtained by laser-ablation synthesis in solution. This method allows a high amount of iron (up to 11 at %) to be incorporated into the gold lattice, which is not possible in Au-Fe alloys synthesized by other routes, due to thermodynamic constraints. The Au Fe nanoalloys exhibit strongly enhanced OER in comparison to the individual pure metal nanoparticles, lowering the onset of OER and increasing up to 20 times the current density in alkaline aqueous solutions. Such a remarkable electrocatalytic activity is associated to nanoalloying, as demonstrated by comparative examples with physical mixtures of gold and iron nanoparticles. These results open attractive scenarios to the use of kinetically stable nanoalloys for catalysis and energy conversion.
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| http://dx.doi.org/10.1002/anie.201703387 | DOI Listing |
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