High efficiency of Pt2+ - CeO2 novel thin film catalyst as anode for proton exchange membrane fuel cells

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F16%3A10334280" target="_blank" >RIV/00216208:11320/16:10334280 - isvavai.cz</a>

Výsledek na webu

<a href="https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=EdPIoUdt-a" target="_blank" >https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=EdPIoUdt-a</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.apcatb.2016.02.036" target="_blank" >10.1016/j.apcatb.2016.02.036</a>

Jazyk výsledku

angličtina

Název v původním jazyce

High efficiency of Pt2+ - CeO2 novel thin film catalyst as anode for proton exchange membrane fuel cells

Popis výsledku v původním jazyce

The elevated price of Pt limits the large-scale implementation of commercial proton exchange membrane fuel cells, which effectively convert chemical energy into electricity. In order to increase the cost-efficiency in proton-exchange membrane fuel cells, we have designed a family of novel anode catalysts consisting of thin films of ceria with low Pt loadings sputtered on a nanostructured carbon support. Remarkably, only such small amounts of Pt are necessary for achieving power density values comparable to the reference commercial catalysts, which results in excellent specific activities of our samples. By combining photoelectron spectroscopy and catalytic performance analysis, we have shown that the surface Pt2+ species in cerium oxide exhibit high electrocatalytic activity. Density functional theory calculations show that the great stability of Pt2+ species on ceria makes these resistant to reduction by hydrogenation and suggests that the formation of such stable surface complexes prevents degradation of the nanostructured composite.

Název v anglickém jazyce

High efficiency of Pt2+ - CeO2 novel thin film catalyst as anode for proton exchange membrane fuel cells

Popis výsledku anglicky

The elevated price of Pt limits the large-scale implementation of commercial proton exchange membrane fuel cells, which effectively convert chemical energy into electricity. In order to increase the cost-efficiency in proton-exchange membrane fuel cells, we have designed a family of novel anode catalysts consisting of thin films of ceria with low Pt loadings sputtered on a nanostructured carbon support. Remarkably, only such small amounts of Pt are necessary for achieving power density values comparable to the reference commercial catalysts, which results in excellent specific activities of our samples. By combining photoelectron spectroscopy and catalytic performance analysis, we have shown that the surface Pt2+ species in cerium oxide exhibit high electrocatalytic activity. Density functional theory calculations show that the great stability of Pt2+ species on ceria makes these resistant to reduction by hydrogenation and suggests that the formation of such stable surface complexes prevents degradation of the nanostructured composite.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10305 - Fluids and plasma physics (including surface physics)

Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2016

Kód důvěrnosti údajů

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

Název periodika

Applied Catalysis B: Environmental

ISSN

0926-3373

e-ISSN

—

Svazek periodika

197

Číslo periodika v rámci svazku

Nov

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

9

Strana od-do

262-270

Kód UT WoS článku

000381536500027

EID výsledku v databázi Scopus

2-s2.0-84959221690