TUTCRIS

TY - JOUR

T1 - Electron microscopic studies of natural gas oxidation catalyst – Effects of thermally accelerated aging on catalyst microstructure

AU - Honkanen, Mari

AU - Hansen, Thomas W.

AU - Jiang, Hua

AU - Kärkkäinen, Marja

AU - Huuhtanen, Mika

AU - Heikkinen, Olli

AU - Kallinen, Kauko

AU - Lahtinen, Jouko

AU - Keiski, Riitta L.

AU - Wagner, Jakob B.

AU - Vippola, Minnamari

PY - 2017/5/1

Y1 - 2017/5/1

N2 - Structural changes of PtPd nanoparticles in a natural gas oxidation catalyst were studied at elevated temperatures in air and low-oxygen conditions and in situ using environmental transmission electron microscopy (ETEM). The fresh catalyst shows x particles on the γ-Al2O3 support. At 700 °C, the noble metal oxide decomposes and Pt gets trapped by PdO particles followed by formation of metallic Pd and Pt containing particles. At 1000 °C, the particles had a metallic Pd and Pt containing core surrounded by PdO particles. In addition, the presence of

AB - Structural changes of PtPd nanoparticles in a natural gas oxidation catalyst were studied at elevated temperatures in air and low-oxygen conditions and in situ using environmental transmission electron microscopy (ETEM). The fresh catalyst shows x particles on the γ-Al2O3 support. At 700 °C, the noble metal oxide decomposes and Pt gets trapped by PdO particles followed by formation of metallic Pd and Pt containing particles. At 1000 °C, the particles had a metallic Pd and Pt containing core surrounded by PdO particles. In addition, the presence of

KW - Environmental transmission electron microscope

KW - Low-oxygen conditions

KW - Natural gas oxidation

KW - Palladium

KW - Platinum

KW - Sintering

KW - Thermal aging

U2 - 10.1016/j.jcat.2017.03.003

DO - 10.1016/j.jcat.2017.03.003

M3 - Article

VL - 349

SP - 19

EP - 29

JO - Journal of Catalysis

JF - Journal of Catalysis

SN - 0021-9517

ER -