Mechanistic Insights of Ethanol Steam Reforming over Ni-CeOx(111): The Importance of Hydroxyl Groups for Suppressing Coke Formation

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F15%3A10319585" target="_blank" >RIV/00216208:11320/15:10319585 - isvavai.cz</a>

Result on the web

<a href="http://dx.doi.org/10.1021/acs.jpcc.5b04310" target="_blank" >http://dx.doi.org/10.1021/acs.jpcc.5b04310</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1021/acs.jpcc.5b04310" target="_blank" >10.1021/acs.jpcc.5b04310</a>

Result language

angličtina

Original language name

Mechanistic Insights of Ethanol Steam Reforming over Ni-CeOx(111): The Importance of Hydroxyl Groups for Suppressing Coke Formation

Original language description

We have studied the reaction of ethanol and water over Ni-CeO2-x(111) model surfaces to elucidate the mechanistic steps associated with the ethanol steam reforming (ESR) reaction. Our results provide insights about the importance of hydroxyl groups to the ESR reaction over Ni-based catalysts. Systematically, we have investigated the reaction of ethanol on Ni-CeO2-x(111) at varying Ce3+ concentrations (CeO1.8-2.0) with absence/presence of water using a combination of soft X-ray photoelectron spectroscopy(sXPS) and temperature-programmed desorption (TPD). Consistent with previous reports, upon annealing, metallic Ni formed on reduced ceria while NiO was the main component on fully oxidized ceria. Ni is the active phase leading to both the C-C and C-H cleavage of ethanol but is also responsible for carbon accumulation or coking. We have identified a Ni3C phase that formed prior to the formation of coke. At temperatures above 600 K, the lattice oxygen from ceria and the hydroxyl groups fr

Czech name

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Czech description

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Type

J_x - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)

CEP classification

BM - Solid-state physics and magnetism

OECD FORD branch

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Project

—

Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2015

Confidentiality

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

Name of the periodical

Journal of Physical Chemistry C

ISSN

1932-7447

e-ISSN

—

Volume of the periodical

119

Issue of the periodical within the volume

32

Country of publishing house

US - UNITED STATES

Number of pages

9

Pages from-to

18248-18256

UT code for WoS article

000359683800028

EID of the result in the Scopus database

2-s2.0-84939154857