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Ethanol oxidation on a carbon-supported Pt75Sn25 electrocatalyst prepared by reduction with formic acid: Effect of thermal treatment

Paper ID Volume ID Publish Year Pages File Format Full-Text
48691 46518 2007 10 PDF Available
Title
Ethanol oxidation on a carbon-supported Pt75Sn25 electrocatalyst prepared by reduction with formic acid: Effect of thermal treatment
Abstract

A carbon supported Pt–Sn electrocatalyst in the Pt:Sn atomic ratio 75:25 was prepared by the reduction of Pt and Sn precursors with formic acid and thermally treated at 200 °C (Pt–Sn200) and 500 °C (Pt–Sn500). Thermal treatment at both temperatures gave rise to the formation of a predominant phase of cubic Pt3Sn and, to a lesser extent, a hexagonal PtSn phase. The amount of the hexagonal PtSn phase as well as the particle size increased with increasing thermal treatment temperature. The formation of some very large particles (size > 30 nm) was apparent in the Pt–Sn500 catalyst. The activity for the ethanol oxidation reaction (EOR) and the performance in a single direct ethanol fuel cell (DEFC) of the catalyst thermally treated at 200 °C were better than both the as-prepared catalyst and Pt75Sn25/C by ETEK. The higher activity for the EOR of the Pt–Sn200 sample was ascribed to the presence of the Pt3Sn phase and to cleaning effect of the thermal treatment at 200 °C.

Keywords
Pt–Sn alloys; Ethanol oxidation; Direct ethanol fuel cells; Thermal treatment
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Ethanol oxidation on a carbon-supported Pt75Sn25 electrocatalyst prepared by reduction with formic acid: Effect of thermal treatment
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis B: Environmental - Volume 73, Issues 1–2, 24 April 2007, Pages 106–115
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
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Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
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Any Questions? feel free to contact us