Electrochemistry of Phosphorous and Hypophosphorous Acid on a Pt electrode

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60461373%3A22310%2F15%3A43899810" target="_blank" >RIV/60461373:22310/15:43899810 - isvavai.cz</a>

Výsledek na webu

<a href="http://www.sciencedirect.com/science/article/pii/S0013468615001176" target="_blank" >http://www.sciencedirect.com/science/article/pii/S0013468615001176</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.electacta.2015.01.097" target="_blank" >10.1016/j.electacta.2015.01.097</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Electrochemistry of Phosphorous and Hypophosphorous Acid on a Pt electrode

Popis výsledku v původním jazyce

H3PO4 is commonly used as a proton-conducting phase in high temperature proton exchange membrane fuel cell membranes. However, its reduction with hydrogen at elevated temperatures yields compounds like H3PO3 and phosphorus. The aim of this work was to describe the basic electrochemical behaviour of H3PO3 and H3PO2 on a Pt electrode in diluted aqueous H2SO4 solutions. The results show that adsorption of both phosphorus acids studied becomes important at an oxoacid bulk concentration around and below 10 mol dm (3). Adsorption isotherms at 25 and 70 degrees C were determined for both acids. Unusually, the extent of adsorption increases with rising temperature. H3PO3 is anodically oxidised on a bare Pt as well as on a PtO surface. H3PO2 oxidation proceedsmainly on a PtO surface, with the intermediate product being H3PO3. High overvoltage around 1 V is characteristic of all anodic oxidation reactions occurring in the temperature range studied.

Název v anglickém jazyce

Electrochemistry of Phosphorous and Hypophosphorous Acid on a Pt electrode

Popis výsledku anglicky

H3PO4 is commonly used as a proton-conducting phase in high temperature proton exchange membrane fuel cell membranes. However, its reduction with hydrogen at elevated temperatures yields compounds like H3PO3 and phosphorus. The aim of this work was to describe the basic electrochemical behaviour of H3PO3 and H3PO2 on a Pt electrode in diluted aqueous H2SO4 solutions. The results show that adsorption of both phosphorus acids studied becomes important at an oxoacid bulk concentration around and below 10 mol dm (3). Adsorption isotherms at 25 and 70 degrees C were determined for both acids. Unusually, the extent of adsorption increases with rising temperature. H3PO3 is anodically oxidised on a bare Pt as well as on a PtO surface. H3PO2 oxidation proceedsmainly on a PtO surface, with the intermediate product being H3PO3. High overvoltage around 1 V is characteristic of all anodic oxidation reactions occurring in the temperature range studied.

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

CG - Elektrochemie

OECD FORD obor

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Projekt

<a href="/cs/project/7HX13002" target="_blank" >7HX13002: Understanding the Degradation Mechanisms of a High Temperature PEMFC Stack and Optimization of the Individual Components</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>S - Specificky vyzkum na vysokych skolach

Rok uplatnění

2015

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Electrochimica Acta

ISSN

0013-4686

e-ISSN

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Svazek periodika

160

Číslo periodika v rámci svazku

1.4.2015

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

5

Strana od-do

214-218

Kód UT WoS článku

000351115900030

EID výsledku v databázi Scopus

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