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- W2581085655 abstract "Ordered mesoporous Mn 2 O 3 (meso-Mn 2 O 3 ) and meso-Mn 2 O 3 -supported Pd, Pt, and Pd-Pt alloy x (Pd y Pt)/meso-Mn 2 O 3 ; x = (0.10−1.50) wt%; Pd/Pt molar ratio ( y ) = 4.9−5.1 nanocatalysts were prepared using KIT-6-templated and poly(vinyl alcohol)-protected reduction methods, respectively. The meso-Mn 2 O 3 had a high surface area, i.e., 106 m 2 /g, and a cubic crystal structure. Noble-metal nanoparticles (NPs) of size 2.1−2.8 nm were uniformly dispersed on the meso-Mn 2 O 3 surfaces. Alloying Pd with Pt enhanced the catalytic activity in methane combustion; 1.41(Pd 5.1 Pt)/meso-Mn 2 O 3 gave the best performance; T 10% , T 50% , and T 90% (the temperatures required for achieving methane conversions of 10%, 50%, and 90%) were 265, 345, and 425 °C, respectively, at a space velocity of 20000 mL/(g·h). The effects of SO 2 , CO 2 , H 2 O, and NO on methane combustion over 1.41(Pd 5.1 Pt)/meso-Mn 2 O 3 were also examined. We conclude that the good catalytic performance of 1.41(Pd 5.1 Pt)/meso-Mn 2 O 3 is associated with its high-quality porous structure, high adsorbed oxygen species concentration, good low-temperature reducibility, and strong interactions between Pd-Pt alloy NPs and the meso-Mn 2 O 3 support. Alloying Pd with Pt enhanced the catalytic performance in methane combustion. 1.41(Pd 5.1 Pt)/meso-Mn 2 O 3 showed the highest activity because of its large surface area, high O ads concentration, good low-temperature reducibility, and strong Pd-Pt alloy and Mn 2 O 3 interactions." @default.
- W2581085655 created "2017-02-03" @default.
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- W2581085655 date "2017-01-01" @default.
- W2581085655 modified "2023-09-30" @default.
- W2581085655 title "Catalytic performance enhancement by alloying Pd with Pt on ordered mesoporous manganese oxide for methane combustion" @default.
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- W2581085655 doi "https://doi.org/10.1016/s1872-2067(16)62567-6" @default.
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