Catalytic Activity-d-Band Center Correlation for the O2 Reduction on Platinum in Alkaline Solutions

Journal Article · Mon Jan 01 04:00:00 EST 2007 · Journal of Physical Chemistry C

DOI:https://doi.org/10.1021/jp065181r· OSTI ID:930305

Lima, F; Zhang, J; Shao, M; Sasaki, K; Vukmirovic, M; Ticianelli, E; Adzic, R

We determined, by the rotating disk electrode technique, the kinetics of the oxygen-reduction reaction (ORR) on the surfaces of single crystals of Au(111), Ag(111), Pd(111), Rh(111), Ir(111), and Ru(0001), on Pt monolayers deposited on their surfaces, and also on nanoparticles of these metals dispersed on high-surface-area carbon. Plotting the correlation between the experimentally determined activities of these three types of electrocatalysts with the calculated metal d-band center energies,{var_epsilon}{sub d}, revealed a volcano-type dependence. In all cases, the electronic properties of the metal electrocatalysts, represented by the {var_epsilon}{sub d} value, were used for elucidating the metal-dependent catalytic activities, and establishing their electronic properties-the ORR kinetics relationship. Pt(111), Pt/C, and Pt/Pd(111) were found to top their corresponding volcano plots. Pd in alkaline solutions showed particularly high activity, suggesting it may offer potential replacement for Pt in fuel cells.

• Research Organization: Brookhaven National Laboratory (BNL) National Synchrotron Light Source
• Sponsoring Organization: Doe - Office Of Science
• DOE Contract Number: AC02-98CH10886
• OSTI ID: 930305
• Report Number(s): BNL--81015-2008-JA
• Journal Information: Journal of Physical Chemistry C, Journal Name: Journal of Physical Chemistry C Journal Issue: 1 Vol. 111
• Country of Publication: United States
• Language: English

Related Subjects

30 DIRECT ENERGY CONVERSION
CARBON
CORRELATIONS
ELECTROCATALYSTS
ELECTRODES
FUEL CELLS
KINETICS
METALS
MONOCRYSTALS
PLATINUM
REDUCTION
SOLUTIONS
SURFACES
TRIOCTYLPHOSPHINE SULFIDE
national synchrotron light source