کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
6579586 | 1422934 | 2018 | 38 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Effect of the exposed ceria morphology on the catalytic activity of gold/ceria catalysts for the preferential oxidation of carbon monoxide
ترجمه فارسی عنوان
تاثیر مورفولوژی سریع در معرض فعالیت کاتالیزوری کاتالیزورهای طلا / سریال برای اکسید ترجیح مونوکسید کربن
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
مهندسی شیمی (عمومی)
چکیده انگلیسی
Ceria (CeO2) with different crystal-planes were used as supports to synthesize gold (Au)/CeO2 catalysts for the preferential oxidation of carbon monoxide (CO). A CeO2 morphology-dependent Au-CeO2 interaction was observed. Au/CeO2-R in this present work performed the outstanding activity at lower temperature than ever since other works were reported. The Au catalyst supported on rod-shaped CeO2 exhibited the highest CO conversion level of 97.9% at 30â¯Â°C, followed by that on polyhedral- (94.0%), cube- (74.0%) and octahedral- (27.7%) shaped CeO2. The catalytic activities were strongly affected by the CeO2 crystal-planes and Au active species. The rod-shaped CeO2 enclosed by (1â¯1â¯0) and (1â¯0â¯0) planes might interact strongly with Au species, generating the most accessible active sites to absorb/desorb and activate the CO and oxygen molecules. The octahedral-shaped CeO2 enclosed by the (1â¯1â¯1) plane had the lowest catalytic activity since the (1â¯1â¯1) plane is the most stable and irreducible of the CeO2 (1â¯1â¯1), (1â¯0â¯0) and (1â¯1â¯0) planes, accounting for its decreased catalytic activity.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Chemical Engineering Journal - Volume 344, 15 July 2018, Pages 545-555
Journal: Chemical Engineering Journal - Volume 344, 15 July 2018, Pages 545-555
نویسندگان
Mike Carltonbird, Srisin Eaimsumang, Sangobtip Pongstabodee, Supakorn Boonyuen, Siwaporn Meejoo Smith, Apanee Luengnaruemitchai,