Recent Advances in Platinum Monolayer Electrocatalysts for Oxygen Reduction Reaction: Scale-up Synthesis Structure and Activity of Pt Shells on Pd Cores

Journal Article · Mon Mar 01 04:00:00 EST 2010 · Electrochimica Acta

DOI:https://doi.org/10.1016/j.electacta.2009.11.106· OSTI ID:1042936

Sasaki, K; Wang, J X; Naohara, H; Marinkovic, N; More, K; Inada, H; Adzic, R R

We have established a scale-up synthesis method to produce gram-quantities of Pt monolayer electrocatalysts. The core-shell structure of the Pt/Pd/C electrocatalyst has been verified using the HAADF-STEM Z-contrast images, STEM/EELS, and STEM/EDS line profile analysis. The atomic structure of this electrocatalyst and formation of a Pt monolayer on Pd nanoparticle surfaces were examined using in situ EXAFS. The Pt mass activity of the Pt/Pd/C electrocatalyst for ORR is considerably higher than that of commercial Pt/C electrocatalysts. The results with Pt monolayer electrocatalysts may significantly impact science of electrocatalysis and fuel-cell technology, as they have demonstrated an exceptionally effective way of using Pt that can resolve problems of other approaches, including electrocatalysts inadequate activity and high Pt content.

• Research Organization: BROOKHAVEN NATIONAL LABORATORY (BNL)
• Sponsoring Organization: USDOE SC OFFICE OF SCIENCE (SC)
• DOE Contract Number: AC02-98CH10886
• OSTI ID: 1042936
• Report Number(s): BNL--93704-2010-JA
• Journal Information: Electrochimica Acta, Journal Name: Electrochimica Acta Journal Issue: 8 Vol. 55; ISSN 0013-4686; ISSN ELCAAV
• Country of Publication: United States
• Language: English

Related Subjects

30 DIRECT ENERGY CONVERSION
ELECTROCATALYSTS
FUEL CELLS
OXYGEN
PEMFC
PLATINUM
SYNTHESIS
core-shell nanoparticles
oxygen reduction reaction