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Methane Combustion Over Ni/Ce x Zr 1–x O 2 Catalysts: Impact of Ceria/Zirconia Ratio
Author(s) -
Chen Junjie,
Carlson Benjamin D.,
Toops Todd J.,
Li Zhenglong,
Lance Michael J.,
Karakalos Stavros G.,
Choi JaeSoon,
Kyriakidou Eleni A.
Publication year - 2020
Publication title -
chemcatchem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.497
H-Index - 106
eISSN - 1867-3899
pISSN - 1867-3880
DOI - 10.1002/cctc.202000947
Subject(s) - catalysis , materials science , nickel , cubic zirconia , zirconium , doping , oxygen , nuclear chemistry , inorganic chemistry , chemistry , metallurgy , ceramic , biochemistry , optoelectronics , organic chemistry
Abstract A series of Ce x Zr 1–x O 2 (x=1, 0.83, 0.17, 0) supports and 2 wt.% Ni/Ce x Zr 1–x O 2 catalysts were synthesized and evaluated for CH 4 oxidation. The Ce x Zr 1–x O 2 supports showed moderate activity (T 50 =519‐638 °C) with CO by‐product formation. Nickel incorporation onto Ce x Zr 1–x O 2 lowered the T 50 to 438–477 °C and eliminated the formation of CO. The results indicated that moderate Zr doping improved the support oxygen storage capacity (OSC) and reducibility of the catalyst at low temperatures (H 2 ‐TPR) leading to an enhanced CH 4 combustion turnover frequency: Ni/ZrO 2