Methanol to hydrogen conversion on cobalt-ceria catalysts prepared by magnetron sputtering

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F21%3A10439689" target="_blank" >RIV/00216208:11320/21:10439689 - isvavai.cz</a>

Výsledek na webu

<a href="https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=-0HzVusdco" target="_blank" >https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=-0HzVusdco</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.ijhydene.2021.02.167" target="_blank" >10.1016/j.ijhydene.2021.02.167</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Methanol to hydrogen conversion on cobalt-ceria catalysts prepared by magnetron sputtering

Popis výsledku v původním jazyce

Methanol oxidation catalyzed by bi-layered or mixed oxides of cobalt and cerium was studied at atmospheric pressure by temperature-programmed reaction technique. The catalysts were deposited in the form of thin films by magnetron sputtering from Co and CeO2 targets, forming double layer structures of CeO2/CoOx or CoOx/CeO2. Reaction selectivity and hydrogen production rates were monitored at O-2:CH3OH reactant stoichiometries varied in the range 4:1-1:4, spanning from oxygen rich to oxygen lean reaction conditions. A complementary information in regard to thermal stability of the catalytic layers was obtained by X-ray photoelectron spectroscopy. A strong synergistic interaction between cerium and cobalt within the mixed oxide (driving dynamics of the Co2+/Co3+ and Ce4+/Ce3+ redox pairs and oxygen exchange) leads to a bi-functional catalyst. Particularly the CeO2/CoOx configuration proved to be significantly more active than the CoOx alone and more stable, especially under reducing environments. Further optimization of reactivity can be provided via control of the adlayer coverage. (C) 2021 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.

Název v anglickém jazyce

Methanol to hydrogen conversion on cobalt-ceria catalysts prepared by magnetron sputtering

Popis výsledku anglicky

Methanol oxidation catalyzed by bi-layered or mixed oxides of cobalt and cerium was studied at atmospheric pressure by temperature-programmed reaction technique. The catalysts were deposited in the form of thin films by magnetron sputtering from Co and CeO2 targets, forming double layer structures of CeO2/CoOx or CoOx/CeO2. Reaction selectivity and hydrogen production rates were monitored at O-2:CH3OH reactant stoichiometries varied in the range 4:1-1:4, spanning from oxygen rich to oxygen lean reaction conditions. A complementary information in regard to thermal stability of the catalytic layers was obtained by X-ray photoelectron spectroscopy. A strong synergistic interaction between cerium and cobalt within the mixed oxide (driving dynamics of the Co2+/Co3+ and Ce4+/Ce3+ redox pairs and oxygen exchange) leads to a bi-functional catalyst. Particularly the CeO2/CoOx configuration proved to be significantly more active than the CoOx alone and more stable, especially under reducing environments. Further optimization of reactivity can be provided via control of the adlayer coverage. (C) 2021 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.

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

<a href="/cs/project/GA19-22636S" target="_blank" >GA19-22636S: Nanostrukturní katalyzátory bez přítomnosti drahých kovů pro environmentální a energetické aplikace</a><br>

Návaznosti

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

Rok uplatnění

2021

Kód důvěrnosti údajů

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

Název periodika

International Journal of Hydrogen Energy

ISSN

0360-3199

e-ISSN

—

Svazek periodika

46

Číslo periodika v rámci svazku

33

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

12

Strana od-do

17197-17208

Kód UT WoS článku

000646140200014

EID výsledku v databázi Scopus

2-s2.0-85102745092