AuPt core–shell nanocatalysts with bulk Pt activity

TY - JOUR

T1 - AuPt core–shell nanocatalysts with bulk Pt activity

AU - Hartl, Katrin Gabriele

AU - Mayrhofer, Karl J.J.

AU - Lopez, Marco

AU - Goia, Dan

AU - Arenz, Matthias

PY - 2010/11

Y1 - 2010/11

N2 - In the presented work, the evaluation of an unsupported AuPt core-shell catalyst for the oxygen reduction reaction is introduced. Applying only basic chemicals in an upscalable synthesis route, it is demonstrated that uniform, flat, and complete Pt layers around a spherical Au core are obtained. The electrocatalytic measurements show that the surface area specific activity of the AuPt core-shell catalyst towards the important oxygen reduction reaction equals the one of polycrystalline bulk Pt. To our knowledge, this is the first time that the unfavorable particle size effect of Pt nanoparticles could be by-passed for a nanoscale catalyst.

AB - In the presented work, the evaluation of an unsupported AuPt core-shell catalyst for the oxygen reduction reaction is introduced. Applying only basic chemicals in an upscalable synthesis route, it is demonstrated that uniform, flat, and complete Pt layers around a spherical Au core are obtained. The electrocatalytic measurements show that the surface area specific activity of the AuPt core-shell catalyst towards the important oxygen reduction reaction equals the one of polycrystalline bulk Pt. To our knowledge, this is the first time that the unfavorable particle size effect of Pt nanoparticles could be by-passed for a nanoscale catalyst.

M3 - Journal article

SN - 1388-2481

VL - 12

JO - Electrochemistry Communications

JF - Electrochemistry Communications

ER -