Tailoring ruthenium exposure to enhance the performance of fcc platinum@ruthenium core–shell electrocatalysts in the oxygen evolution reaction

• DOI: 10.1039/c6cp01401a
• Publication Date: 2016-05-17T09:02:14Z
• Authors: Noktan M. AlYami; Alec P. LaGrow; Khurram S. Joya; Jinyeon Hwang; Khabiboulakh Katsiev; Dalaver H. Anjum; Yaroslav Losovyj; Lutfan Sinatra; Jin Young Kim; Osman M. Bakr
• Keywords: Oxygen evolution; Ruthenium oxide

The catalytic properties of noble metal nanocrystals are a function their size, structure, and surface composition. In particular, achieving high activity without sacrificing stability is essential for designing commercially viable catalysts. A major challenge in state-of-the-art Ru-based catalysts the oxygen evolution reaction (OER), which key step water splitting, poor tailorability these this study, we designed rapidly synthesizable size-controlled, morphology-selective, surface-tailored platinum-ruthenium core-shell (Pt@Ru) alloy (PtRu) nanocatalysts scalable continuous-flow reactor. These nanoparticles with atomically precise shells were produced single synthetic carbon monoxide as reducing agent. By varying precursor concentration, dendritic or layer-by-layer ruthenium shell can be grown. synthesized Pt@Ru PtRu exhibit noticeably higher electrocatalytic OER compared to that pure Pt Ru nanoparticles. Promisingly, ∼2-3 atomic layer cuboctahedral surpass conventional terms both durability activity.