Au/C catalysts promoted with metal oxides for ethylene glycol electro-oxidation in alkaline solution

บทความในวารสาร

ผู้เขียน/บรรณาธิการ

กลุ่มสาขาการวิจัยเชิงกลยุทธ์

ไม่พบข้อมูลที่เกี่ยวข้อง

รายละเอียดสำหรับงานพิมพ์

รายชื่อผู้แต่ง: Yongprapat S., Therdthianwong A., Therdthianwong S.

ผู้เผยแพร่: Elsevier

ปีที่เผยแพร่ (ค.ศ.): 2013

วารสาร: Journal of Electroanalytical Chemistry (1572-6657)

Volume number: 697

หน้าแรก: 46

หน้าสุดท้าย: 52

จำนวนหน้า: 7

นอก: 1572-6657

URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84876256482&doi=10.1016%2fj.jelechem.2013.03.003&partnerID=40&md5=c329bb4d8fedf9559306d3c8e3b5cef5

ภาษา: English-Great Britain (EN-GB)

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บทคัดย่อ

The Au-based catalysts on metal oxide (MexOy)- promoted carbon supports were prepared by polyvinyl alcohol (PVA) protection method and tested in ethylene glycol electro-oxidation. Three types of Me xOy promoters, CeO2, Fe2O 3 and RuO2, and different Au:MexOy weight ratios of 1:0.25, 1:0.5 and 1:1 were studied. Highly dispersed Au nanoparticles with the average particle sizes approximately 4 nm were obtained for all the catalysts. The activity and stability of the catalysts towards ethylene glycol electro-oxidation in alkaline were investigated via cyclic voltammetry and chronoamperometry, respectively. It was found that the electrocatalytic properties of the promoted catalysts were affected by the type and the Au:MexOy ratio. Both types of Fe2O 3- and RuO2-promoted catalysts yielded higher mass-normalized current density than the unpromoted Au/C. The most stable catalyst in a high mass-normalized current density region was Au-RuO 2/C at Au:RuO2 ratio of 1:0.25. The RuO 2-promoted catalysts were still active even in the potential region where the catalyst surface was fully covered by Au oxide film. In comparison with PtRu/C, the promoted Au catalysts generated higher mass-normalized current density. ฉ 2013 Elsevier B.V. All rights reserved.

คำสำคัญ

Alkaline exchange membrane fuel cells, Ethylene glycol electro-oxidation, Promoted-Au catalysts