Alkaline media electrocatalytic oxidation

P. Parpot, K. B. Kokoh, B. Beden, and C. Lamy, Electrocatalytic oxidation of saccharose in alkaline medium, Electrochim. Acta, 38 (1993) 1679-1683. 

Selective electrocatalytic oxidation of sucrose on smooth and upd-lead modified platinum electrodes in alkaline medium. 

PANI-NTs synthesized by a template method on commercial carbon cloth have been used as the catalyst support for Pt particles for the electro-oxidation of methanol [501]. The Pt-incorporated PANl-NT electrode exhibited excellent catalytic activity and stabUity compared to 20 wt% Pt supported on VulcanXC 72R carbon and Pt supported on a conventional PANI electrode. The electrode fabrication used in this investigation is particularly attractive to adopt in solid polymer electrolyte-based fuel cells, which arc usually operated under methanol or hydrogen. The higher thermal stabUity of y-Mn02 nanoparticles-coated PANI-NFs on carbon electrodes and their activity in formic acid oxidation pomits the realization of Pt-free anodes for formic acid fuel cells [260]. The exceUent electrocatalytic activity of Pd/ PANI-NFs film has recently been confirmed in the electro-oxidation reactions of formic acid in acidic media, and ethanol/methanol in alkaline medium, making it a potential candidate for direct fuel cells in both acidic and alkaline media [502]. 

Elshafei AA, Ehnaksoud SAA, Moussa MNH (1992) Electrocatalytic oxidation of the propanol isomers on platinum ad-atom electrodes in alkaline-medium. Z Phys Chem 177 211-223... 

Parpot P, Nunes N, Bettencourt AP (2006) Electrocatalytic oxidation of monosaccharides on gold electrode in alkaline medium. Structure-reactivity relationship. J Electroanal Chem 596 65-73... 

Parpot P, Pires SG, Bettencourt AP (2004) Electrocatalytic oxidation of D-galactose in alkaline medium. J Electroanal Chem 566 401-408... 

To improve the electrocatalytic activity of platinum and palladium, the ethanol oxidation on different metal adatom-modified, alloyed, and oxide-promoted Pt- and Pd-based electrocatalysts has been investigated in alkaline media. Firstly, El-Shafei et al. [76] studied the electrocatalytic effect of some metal adatoms (Pb, Tl, Cd) on ethanol oxidation at a Pt electrode in alkaline medium. All three metal adatoms, particularly Pb and Tl, improved the EOR activity of ft. More recently, Pt-Ni nanoparticles, deposited on carbon nanofiber (CNE) network by an electrochemical deposition method at various cycle numbers such as 40, 60, and 80, have been tested as catalysts for ethanol oxidadmi in alkaline medium [77]. The Pt-Ni alloying nature and Ni to ft atomic ratio increased with increasing of cycle number. The performance of PtNi80/CNF for the ethanol electrooxidation was better than that of the pure Pt40/CNF, PtNi40/CNF, and PtNi60/CNF. 

Beden B, Kadirgan F, Lamy C, Leger JM (1982) Oxidation of methanol on a platinum-electrode in alkaline-medium - effect of metal Ad-atoms on the electrocatalytic activity. J Electroanal Chem 142(1-2) 171-190... 

Golabi SM, Nozad A (2(X)4) Electrocatalytic oxidation of methanol on a nickel-porphyrin IX complex modified glassy carbon electrode in alkaline medium. Electroanalysis 16(3) 199-209... 

Han XY, Wang DW, Liu D, Huang JS, You TY (2012) Synthesis and electrocatalytic activity of Au/Pt bimetallic nanodendrites for ethanol oxidation in alkaline medium. J Colloid Interface Sci 367 342-347... 

Kadirgan F, Beden B, Lamy C (1983) Electrocatalytic oxidation of ethylene-glycol. 2. Behavior of platinum-Ad-atom electrodes in alkaline-medium. J Electroanal Chem 143(1-2) 135-152... 

Once the Ni nanoparticles (NiNPs) are exposed to the alkaline medium, they react instantly to form converted into O-Ni-0 bridge [137], which are involved in electrocatalysis. Nickel phthalocyanine (NiPc) complexes also form O-Ni-O bridges following cyclic voltammetry cycling in basic media. When both NiPc and NiNPs were employed for electrocatalytic oxidation of amitrole, Fig. 36 [137], the oxidation potential on NiNP-GCE was found to be 0.93 V, a value 60 mV which was less positive than that on bare GCE. The NiNP-GCE (Fig. 36e) showed better electrocatalytic activity relative to the NiPc-GCE (Fig. 36d) as judged by the huge catalytic current observed for the former. The NiNP/NiPc-GCE (Fig. 36c) was not... 

In 2009, Su and Lei [2] investigated the electrochemical catalytical properties based on Pd/polyamide (Pd/PA6) electrospun nanofiber mats for the oxidation of ethanol in alkaline medium in which Pd/PA6 was directly used as electrocatalytic electrodes. 

Golikand, A.N., Shahrokhian, S., Asgari, M., Maragheh, M.G., Irannejad, L. and Khanchi, A. Electrocatalytic oxidation of methanol on a nickel electrode modified by nickel dimethylglyoxime complex in alkaline medium , J. Power Sources, 144 (2005) 21-27. 

Fast microwave-assisted solvothermal synthesis of metal nanoparticles (Pd, Ni, Sn) supported on suUbnated multiwalled carbon nanotubes (MWCNTs) was carried out by Ramulifho et al. (2012). The results showed that the mixed Pd-based catalysts (obtained by simple ultrasonic-mixing of the individual MWCNT-metal nanocomposites) gave better electrocatalytic activity than their alloy nanoparticles (obtained by coreduction of metal salts) or Pd alone. This Pd-based bimetallic catalysts was used for ethanol oxidation in alkaline medium. 

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