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vol.46 número1AZORELLANE DITERPENOIDS FROM LARETIA ACAULIS, AND ITS TOXOPLASMACIDAL ACTIVITYSTUDIES ON CHILEAN LICHENS XXXI: ADDITIONS TO THE CHEMISTRY OF PSEUDOCYPHELLARIA índice de autoresíndice de assuntospesquisa de artigos
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Boletín de la Sociedad Chilena de Química

versão impressa ISSN 0366-1644

Resumo

URETA-ZANARTU, Ma. Soledad; YANEZ, Claudia  e  ZAGAL, José H.. CHANGES IN THE EQCM RESPONSE OF PLATINUM DEPOSITS IN THE HYDROGEN REGION INDUCED BY REPETITIVE CYCLING OF THE ELECTRODE. Bol. Soc. Chil. Quím. [online]. 2001, vol.46, n.1, pp.15-22. ISSN 0366-1644.  http://dx.doi.org/10.4067/S0366-16442001000100004.

The effect of ageing the electrode on the mass response was studied by two approaches, namely: i) ageing the Pt deposits on the Au/Q substrate and ii) ageing the Au/Q substrate and then examining the response of the Pt deposit on the aged Au/Q. Mass changes in the H-region are observed in both cases, which are attributed to an increase in water adsorption/desorption on the Pt surface, due to changes in the structure of the Pt deposit. These changes are not visible in CV curves

Palavras-chave : Hydrogen UPD; EQCM; Platinum electrode.

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