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Effect of the exposed ceria morphology on the catalytic activity of gold/ceria catalysts for the preferential oxidation of carbon monoxide
Carltonbird M. - ไม่ระบุหน่วยงาน
ชื่อเรื่อง (EN): Effect of the exposed ceria morphology on the catalytic activity of gold/ceria catalysts for the preferential oxidation of carbon monoxide
ผู้แต่ง / หัวหน้าโครงการ (EN): Carltonbird M.
บทคัดย่อ (EN): Ceria (CeO 2 ) with different crystal-planes were used as supports to synthesize gold (Au)/CeO 2 catalysts for the preferential oxidation of carbon monoxide (CO). A CeO 2 morphology-dependent Au-CeO 2 interaction was observed. Au/CeO 2 -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 CeO 2 exhibited the highest CO conversion level of 97.9% at 30 °C, followed by that on polyhedral- (94.0%), cube- (74.0%) and octahedral- (27.7%) shaped CeO 2 . The catalytic activities were strongly affected by the CeO 2 crystal-planes and Au active species. The rod-shaped CeO 2 enclosed by (1 1 0) and (1 0 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 CeO 2 enclosed by the (1 1 1) plane had the lowest catalytic activity since the (1 1 1) plane is the most stable and irreducible of the CeO 2 (1 1 1), (1 0 0) and (1 1 0) planes, accounting for its decreased catalytic activity. © 2018 Elsevier B.V.
บทคัดย่อ: ไม่พบข้อมูลจากหน่วยงานต้นทาง
ภาษา (EN): en
เอกสารแนบ (EN): https://www.scopus.com/inward/record.uri?eid=2-s2.0-85044524512&doi=10.1016%2fj.cej.2018.03.111&partnerID=40&md5=b942d16e3555339d415811a10857be8b
เผยแพร่โดย (EN): มหาวิทยาลัยมหิดล
คำสำคัญ (EN): Catalyst activity
เจ้าของลิขสิทธิ์ (EN): มหาวิทยาลัยมหิดล
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Effect of the exposed ceria morphology on the catalytic activity of gold/ceria catalysts for the preferential oxidation of carbon monoxide
Carltonbird M.
มหาวิทยาลัยมหิดล
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