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Titolo:
Kinetic model of induced codeposition of Ni-Mo alloys
Autore:
Zeng, Y; Ma, M; Xiao, XM; Li, ZL; Lian, SX; Zhou, SM;
Indirizzi:
Hunan Normal Univ, Dept Chem, Changsha 410006, Hunan, Peoples R China Hunan Normal Univ Changsha Hunan Peoples R China 410006 , Peoples R China Xiamen Univ, Dept Chem, Xiamen 361005, Peoples R China Xiamen Univ Xiamen Peoples R China 361005 Xiamen 361005, Peoples R China
Titolo Testata:
CHINESE JOURNAL OF CHEMISTRY
fascicolo: 1, volume: 18, anno: 2000,
pagine: 29 - 34
SICI:
1001-604X(200001/02)18:1<29:KMOICO>2.0.ZU;2-W
Fonte:
ISI
Lingua:
ENG
Soggetto:
HYDROGEN EVOLUTION REACTION; POWDER ELECTRODES; P ALLOY; MECHANISM; CITRATE;
Keywords:
kinetic model; induced codeposition; Ni-Mo alloy;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
27
Recensione:
Indirizzi per estratti:
Indirizzo: Zeng, Y Hunan Normal Univ, Dept Chem, Changsha 410006, Hunan, Peoples R China Hunan Normal Univ Changsha Hunan Peoples R China 410006 s R China
Citazione:
Y. Zeng et al., "Kinetic model of induced codeposition of Ni-Mo alloys", CHIN J CHEM, 18(1), 2000, pp. 29-34

Abstract

The kinetic model of induced codeposition of nickel-molybdenum alloys fromammonium citrate solution was studied on rotating disk electrodes to predict the behavior of the electrode-position. The molybdate (MoO42-) could be firstly electrochemically reduced to MoO2, and subsequently undergoes a chemical reduction with atomic hydrogen previously adsorbed on the inducing metal nickel to form molybdenum in alloys. The kinetic equations were derived, and the kinetic parameters were obtained from a comparison of experimental results and the kinetic equations. The electrochemical rate constants fordischarge of nickel, molybdenum and water could been expressed as k(1)(E) = 1. 23 x 10(-9) C(Ni)exp( - 0.198FE/RT) mol/(dm(2).s), k(2)(E) = 3.28 x 10(-10) C(Mo)exp(- 0.208FE/RT) mol/(dm(2).s) and k(3)(E) = 1.27 x 10(-6)exp(-0.062FE/RT) mol/(dm(2).s), where C-Ni and C-Mo are the concentrations of the nickel ion and molybdate, respectively, and E is the applied potential vs. saturated calomel electrode (SCE). The codeposition process could be well simulated by this model.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 02/06/20 alle ore 22:45:13