ArticleScientific reports2025
Nano-modulation of palladium surfaces with iridium and iron oxide for boosted catalysis of formic acid electro-oxidation.
Article in Scientific reports, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
In an attempt to boost the workability and durability of the direct formic acid fuel cells (DFAFCs), a highly efficient Pd-based electrocatalyst for formic acid electrooxidation (FAO) was developed. This was achieved by adopting the layer-by-layer "sequential" approach to electrodeposit palladium (nano-Pd, semi-spherical of average particle size of ca. 90 nm), iron oxide (nano-FeOx, nanowires of ca. 177 nm in average length and 33 nm in average diameter) and iridium (nano-Ir, spherical of ca. 80 nm in average diameter) nanostructures onto a glassy carbon electrode (GCE). The layers' hierarchy of the catalyst was varied, and the Ir/FeOx/Pd/GCE sequence was optimized for FAO. This catalyst exhibited remarkable enhancement in the electrochemical activity (up to 2.35-fold higher), stability (10-times lower in poisoning rate), turnover frequency (2.5 times higher) and charge transfer resistance (36-times lower) than the Pd/GCE catalyst toward FAO. According to XPS analysis, nano-Pd existed in mixed metallic (Pd
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