{"id":89015,"date":"2018-03-10T00:14:07","date_gmt":"2018-03-10T00:14:07","guid":{"rendered":"https:\/\/www.deberes.net\/tesis\/sin-categoria\/electroquimica-de-sustancias-electrocromicas-y-electrocataliticas-incluidas-en-films-de-nafion\/"},"modified":"2018-03-10T00:14:07","modified_gmt":"2018-03-10T00:14:07","slug":"electroquimica-de-sustancias-electrocromicas-y-electrocataliticas-incluidas-en-films-de-nafion","status":"publish","type":"post","link":"https:\/\/www.deberes.net\/tesis\/fisica\/electroquimica-de-sustancias-electrocromicas-y-electrocataliticas-incluidas-en-films-de-nafion\/","title":{"rendered":"Electroquimica de sustancias electrocromicas y electrocataliticas incluidas en films de nafion."},"content":{"rendered":"<h2>Tesis doctoral de <strong>  San Matias Izquierdo Ana <\/strong><\/h2>\n<p>Con esta memoria se pretende completar los estudios sobre azul de prusia, en la zona de potenciales que corresponde a la oxidaci\u00f3n de azul de prusia(pb) a amarillo de prusia (py). Para ello se han preparado films de estructura amorfa y cristalina, comparando su comportamiento electroqu\u00edmico.  por otra parte, una vez caracterizado el sistema ito\/nafion de forma independiente, se ha empleado como matriz de inserci\u00f3n para el estudio de sustancias de inter\u00e9s electrocatal\u00edtico(como complejos de cobalto y molibdeno vi, y como membrana. En este \u00faltimo caso se  ha empleado depositado como film delgado sobre el sistema ito\/pb.  como t\u00e9cnicas experimentales se han empleado principalmente voltamperometr\u00eda c\u00edclica y espectroscopia de impedancia electroqu\u00edmica, as\u00ed como potenciametr\u00eda y cronoamperometr\u00eda.  en nafion se considera una membrana de intercambio i\u00f3nico con una elevada selectividad cati\u00f3nica. El impedimento al paso de los aniones a trav\u00e9s de la membrana de nafion es la propiedad clave empleada en el estudio del mecanismo de reacci\u00f3n de azul de prusia a amarillo de prusia. Esta reacci\u00f3n puede tener lugar mediante entrada de aniones presentes en la disoluci\u00f3n externa o por salida de iones k+para mantener la electroneutralidad.  los resultados experimentales muestran que el mecanismo de oxidaci\u00f3n est\u00e1 determinado por elgrado de cristlinidad de los films de azul de prusia.  mediante espectroscopia de impedancia se ha estudiado el efecto de la variaci\u00f3n de temperatura y de potencial.Los datos experimentales para los dos tipos de films son coherentes con los que se obtienen mediante voltamperometr\u00eda c\u00edclica.  adem\u00e1s de impedir el paso de aniones hacia el interior de la estructura de azul de prusia, el nafion protege al sistema ito\/pb frente a la degradaci\u00f3n de los films, que se producir\u00eda por salida de iones fe(iii) complejados con anion cloruro.<\/p>\n<p>&nbsp;<\/p>\n<h3>Datos acad\u00e9micos de la tesis doctoral \u00ab<strong>Electroquimica de sustancias electrocromicas y electrocataliticas incluidas en films de nafion.<\/strong>\u00ab<\/h3>\n<ul>\n<li><strong>T\u00edtulo de la tesis:<\/strong>\u00a0 Electroquimica de sustancias electrocromicas y electrocataliticas incluidas en films de nafion. <\/li>\n<li><strong>Autor:<\/strong>\u00a0  San Matias Izquierdo Ana <\/li>\n<li><strong>Universidad:<\/strong>\u00a0 Universitat de val\u00e9ncia (estudi general)<\/li>\n<li><strong>Fecha de lectura de la tesis:<\/strong>\u00a0 23\/02\/2001<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<h3>Direcci\u00f3n y tribunal<\/h3>\n<ul>\n<li><strong>Director de la tesis<\/strong>\n<ul>\n<li>Francisco Vicente Pedr\u00f3s<\/li>\n<\/ul>\n<\/li>\n<li><strong>Tribunal<\/strong>\n<ul>\n<li>Presidente del tribunal: angela Molina gomez <\/li>\n<li>Luis Camacho delgado (vocal)<\/li>\n<li>michel Keddam (vocal)<\/li>\n<li>ricardo Souto suarez (vocal)<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Tesis doctoral de San Matias Izquierdo Ana Con esta memoria se pretende completar los estudios sobre azul de prusia, en [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center 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