title: Dry Reforming of Methane on a Highly-Active Ni-CeO2 Catalyst: Effects of Metal-Support Interactions on C-H Bond Breaking.
abstract: Ni-CeO2 is a highly efficient, stable and non-expensive catalyst for methane dry reforming at relative low temperatures (700 K). The active phase of the catalyst consists of small nanoparticles of nickel dispersed on partially reduced ceria. Experiments of ambient pressure XPS indicate that methane dissociates on Ni/CeO2 at temperatures as low as 300 K, generating CHx and COx species on the surface of the catalyst. Strong metal-support interactions activate Ni for the dissociation of methane. The results of density-functional calculations show a drop in the effective barrier for methane activation from 0.9 eV on Ni(111) to only 0.15 eV on Ni/CeO2-x (111). At 700 K, under methane dry reforming conditions, no signals for adsorbed CHx or C species are detected in the C 1s XPS region. The reforming of methane proceeds in a clean and efficient way.
authors.affiliation: Department of Chemistry, State University of New York at Stony Brook, Stony Brook, NY, 11794, USA.
authors.forename: Zongyuan
authors.initials: Z
authors.lastname: Liu
authors.affiliation: Chemistry Department, Brookhaven National Laboratory, Upton, NY, 11973, USA.
authors.forename: David C
authors.initials: DC
authors.lastname: Grinter
authors.affiliation: Instituto de Fisica Rosario (IFIR), CONICET-Universidad Nacional de Rosario, Argentina.
authors.forename: Pablo G
authors.initials: PG
authors.lastname: Lustemberg
authors.affiliation: Chemistry Department, Brookhaven National Laboratory, Upton, NY, 11973, USA.
authors.forename: Thuy-Duong
authors.initials: TD
authors.lastname: Nguyen-Phan
authors.affiliation: Department of Chemistry, University of Wyoming, Laramie, WY, 82071, USA.
authors.forename: Yinghui
authors.initials: Y
authors.lastname: Zhou
authors.affiliation: Department of Chemistry, State University of New York at Stony Brook, Stony Brook, NY, 11794, USA.
authors.forename: Si
authors.initials: S
authors.lastname: Luo
authors.affiliation: Chemistry Department, Brookhaven National Laboratory, Upton, NY, 11973, USA.
authors.forename: Iradwikanari
authors.initials: I
authors.lastname: Waluyo
authors.affiliation: Advanced Light Source, Lawrence Berkeley National Laboratory, Berkeley, CA, 94720, USA.
authors.forename: Ethan J
authors.initials: EJ
authors.lastname: Crumlin
authors.affiliation: Chemistry Department, Brookhaven National Laboratory, Upton, NY, 11973, USA.
authors.forename: Dario J
authors.initials: DJ
authors.lastname: Stacchiola
authors.affiliation: Department of Chemistry, University of Wyoming, Laramie, WY, 82071, USA.
authors.forename: Jing
authors.initials: J
authors.lastname: Zhou
authors.affiliation: CIC Energigune, Albert Einstein 48, 01510, Miñano, Álava, Spain.
authors.forename: Javier
authors.initials: J
authors.lastname: Carrasco
authors.affiliation: Instituto de Fisica Rosario (IFIR), CONICET-Universidad Nacional de Rosario, Argentina.
authors.forename: H Fabio
authors.initials: HF
authors.lastname: Busnengo
authors.affiliation: Instituto de Catálisis y Petroleoquímica, CSIC, C/Marie Curie 2, 28049, Madrid, Spain. vgp@icp.csic.es.
authors.forename: M Verónica
authors.initials: MV
authors.lastname: Ganduglia-Pirovano
authors.affiliation: Chemistry Department, Brookhaven National Laboratory, Upton, NY, 11973, USA. ssenanay@bnl.gov.
authors.forename: Sanjaya D
authors.initials: SD
authors.lastname: Senanayake
authors.affiliation: Department of Chemistry, State University of New York at Stony Brook, Stony Brook, NY, 11794, USA. rodrigez@bnl.gov.|Chemistry Department, Brookhaven National Laboratory, Upton, NY, 11973, USA. rodrigez@bnl.gov.
authors.forename: José A
authors.initials: JA
authors.lastname: Rodriguez
keywords: X-ray photoelectron spectroscopy; ceria; density functional theory; methane dissociation; nickel