TY - JOUR
T1 - In situ photoemission observation of catalytic CO oxidation reaction on Pd(110) under near-ambient pressure conditions
T2 - Evidence for the Langmuir-Hinshelwood mechanism
AU - Toyoshima, Ryo
AU - Yoshida, Masaaki
AU - Monya, Yuji
AU - Suzuki, Kazuma
AU - Amemiya, Kenta
AU - Mase, Kazuhiko
AU - Mun, Bongjin Simon
AU - Kondoh, Hiroshi
PY - 2013/10/10
Y1 - 2013/10/10
N2 - CO oxidation reaction on a Pd(110) single crystal surface at various temperatures under near-ambient-pressure conditions has been investigated using in situ X-ray photoemission spectroscopy and mass spectroscopy. At lower temperature conditions, the CO2 formation rate is low, where the surface is covered by CO molecules (i.e., CO poisoning). Above a critical temperature 165 C the Pd(110) surface converts to a catalytically active surface and is dominated by chemisorbed oxygen species. Further at the higher temperatures up to 320 C, the CO2 formation rate is gradually decreased to about 80% of the maximum rate. At this moment, the amount of chemisorbed O was also decreased, which suggests that the CO oxidation reaction proceeds via the conventional Langmuir-Hinshelwood mechanism even under near-ambient pressure conditions.
AB - CO oxidation reaction on a Pd(110) single crystal surface at various temperatures under near-ambient-pressure conditions has been investigated using in situ X-ray photoemission spectroscopy and mass spectroscopy. At lower temperature conditions, the CO2 formation rate is low, where the surface is covered by CO molecules (i.e., CO poisoning). Above a critical temperature 165 C the Pd(110) surface converts to a catalytically active surface and is dominated by chemisorbed oxygen species. Further at the higher temperatures up to 320 C, the CO2 formation rate is gradually decreased to about 80% of the maximum rate. At this moment, the amount of chemisorbed O was also decreased, which suggests that the CO oxidation reaction proceeds via the conventional Langmuir-Hinshelwood mechanism even under near-ambient pressure conditions.
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U2 - 10.1021/jp4054132
DO - 10.1021/jp4054132
M3 - Article
AN - SCOPUS:84885590312
SN - 1932-7447
VL - 117
SP - 20617
EP - 20624
JO - Journal of Physical Chemistry C
JF - Journal of Physical Chemistry C
IS - 40
ER -