Real electrode surface area by Zn2+ adsorption and electrocatalytical reactivity for the oxygen reduction reaction. Comparison of the electrocatalytical reactivity of pure and composite spinel oxide Cu1 + xMn2−xo4(0 < x < 0.4) electrodes
✍ Scribed by A. Restovic; G. Poillerat; P. Chartier; J.L. Gautier
- Publisher
- Elsevier Science
- Year
- 1995
- Tongue
- English
- Weight
- 640 KB
- Volume
- 40
- Category
- Article
- ISSN
- 0013-4686
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✦ Synopsis
Zn2+
adsorption was used to determine the electrochemically active surface area (EASA) of spray pyrolized (SP) film electrodes and of powders prepared by decomposition of metal salts (DMS) in composite graphite and teflon bonded electrodes of spine1 oxide Cu,+,Mn,_,O, (0 < x < 0.4) (DMSGT). It is shown that both SP and DMS materials are nanosized with particle diameters in the range 50-80A and EASAs per unit loading mass M (EASAM) 1300-2200cm2 mg-'. The lesser intrinsic reactivity in the case of DMSGT electrodes is attributed to modification of the surface reactivity of pure oxide particles in contact with graphite and teflon.