کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
61377 47578 2012 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Catalytic co-oxidation of CO and H2 over FeOx-supported Pd catalyst at low temperatures
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی کاتالیزور
پیش نمایش صفحه اول مقاله
Catalytic co-oxidation of CO and H2 over FeOx-supported Pd catalyst at low temperatures
چکیده انگلیسی

Co-oxidation of CO and H2 or oxidation of H2 in the presence of CO was first achieved at low temperatures (0–20 °C) over single-component catalysts (Pd/FeOx  ) at a space velocity of 15,000mlgcat-1h-1. A systematical study of FeOx- and Al2O3-supported Pd catalysts is carried out by means of STEM, TEM, XRD, XPS, Mössbauer spectra, and time-resolved CO titration. Highly dispersed Pd nanoparticles with size 1–1.8 nm over 5.4 wt% Pd/FeOx are confirmed by HAADF-STEM and HRTEM. Time-resolved CO titration, Mössbauer spectra, and XRD and XPS results suggest FeOx support supplying active oxygen is involved in the oxidations. Particle size effect and oxygen supply from FeOx support are speculated to be the main reasons for the excellent performance of Pd/FeOx in co-oxidation of CO and H2 or oxidation of H2 in the presence of CO.

Co-oxidation of CO and H2 or oxidation of H2 in the presence of CO was achieved at low temperatures (0–20 °C) over single-component catalysts (Pd/FeOx  ) at a space velocity of 15,000mlgcat-1h-1. Based on a systematical characterization study, it is speculated that highly dispersed Pd nano particles and FeOx support supplying active oxygen which is involved in oxidations are the key factors for excellent performance of Pd/FeOx for co-oxidation of CO and H2 at low temperatures.Figure optionsDownload high-quality image (159 K)Download as PowerPoint slideHighlights
► Co-oxidation of CO and H2 or oxidation of H2 in the presence of CO was achieved at low temperatures (0–20 °C).
► Particle size effect is evident.
► Highly dispersed Pd nano particles over Pd/FeOx are indispensable but not enough for high co-oxidation activity.
► FeOx support supplying active oxygen is involved in oxidations.
► Time-resolved CO titration.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Catalysis - Volume 294, October 2012, Pages 29–36
نویسندگان
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