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Titolo:
PROMOTING CATALYSIS OF ANODIC-OXIDATION O F MN2+ TO MN3+ IONS ON PT AND PBO2 ELECTRODES BY SILVER(I) ION
Autore:
JIN SX; WANG L; ZHOU WF;
Indirizzi:
NANKAI UNIV,DEPT CHEM TIANJIN 300071 PEOPLES R CHINA
Titolo Testata:
Gaodeng xuexiao huaxue xuebao
fascicolo: 5, volume: 16, anno: 1995,
pagine: 796 - 798
SICI:
0251-0790(1995)16:5<796:PCOAOF>2.0.ZU;2-N
Fonte:
ISI
Lingua:
CHI
Keywords:
PLATINUM ELECTRODE; LEAD DIOXIDE ELECTRODE; ANODIC FORMATION OF MN3+ ION; ANODIC EVOLUTION OF OXYGEN; PROMOTING CATALYSIS OF SILVER(I)ION;
Tipo documento:
Note
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
5
Recensione:
Indirizzi per estratti:
Citazione:
S.X. Jin et al., "PROMOTING CATALYSIS OF ANODIC-OXIDATION O F MN2+ TO MN3+ IONS ON PT AND PBO2 ELECTRODES BY SILVER(I) ION", Gaodeng xuexiao huaxue xuebao, 16(5), 1995, pp. 796-798

Abstract

The influence of Ag+ ions on the evolution of O-2 and the anodic formation of Mn3+ at Pt and Pb\PbO2 anodes was investigated in concentrated sulfuric acid solutions. The kinetic data related respectively to Mn3+ anodic formation and O-2 anodic evolution at Pt and Pb\PbO2 anodes in mixed H2SO4-MnSO4 solutions were measured by resolving the steady-state polarization curves. The Tafel slope of steady-state phi-lgi relationships for Mn3+ anodic formation reaction is close to 2 X 2.303RT/beta F, whereas for O-2 anodic evolution it is close to 2.303RT/beta F (with beta = 0.5), The influence of Ag+ ions on the kinetics of evolution and Mn3+ anodic formation at Pt and Pb\PbO2 electrodes was compared as a function of Ag+ ions concentration. The O-2 evolution and Mn3+ formation rate increased uniformly with increasing Ag+ ions concentration in the electrolytes. The kinetic data show that Mn3+ anodic formation (i(Mn3+)) and O-2 anodic evolution (i(O-2)) increased by Ag+ ions. Since the effect on i (Mn3+) was larger than that an i(O-2) at the Ptelectrode and smaller than that on i(O-2) at the Pb\PbO2 electrode, the current efficiency of Mn3+ formation increased at the Pt electrode and decreased at the Pb\PbO2 electrode.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 05/12/20 alle ore 09:14:35