Mesoporous palladium-the surface electrochemistry of palladium in aqueous sodium hydroxide and the cathodic reduction of nitrite.
The voltammetry of nanostructured palladium layers electrodeposited from a hexagonal liquid crystal phase onto platinum microdiscs show well defined peaks for the adsorption/desorption of hydrogen and surface oxidation/reduction in 2 M NaOH. These peaks are more clearly resolved than at smooth palladium and reveal the complications associated with hydrogen adsorption/desorption on palladium in aqueous alkaline solutions. The reduction of nitrite at the nanostructured palladium is also reported and it is shown that it occurs via a mechanism involving a chemical reaction between adsorbed hydrogen and adsorbed nitrite ion.
Denuault
Guy
G
Department of Chemistry, The University, Southampton, UK SO17 1BJ.
Milhano
Clélia
C
Pletcher
Derek
D
D000327:Adsorption; D004563:Electrochemistry; D049329:Nanostructures / Q000737:chemistry*; D009573:Nitrites / Q000737:chemistry*; D010084:Oxidation-Reduction; D010165:Palladium / Q000737:chemistry*; D010316:Particle Size; D016062:Porosity; D012972:Sodium Hydroxide / Q000737:chemistry*; D013499:Surface Properties; D014867:Water / Q000737:chemistry
D009573:Nitrites; D014867:Water; D012972:Sodium Hydroxide; D010165:Palladium