Tin-oxide-coated single-walled carbon nanotube bundles supporting platinum electrocatalysts for direct ethanol fuel cells

Abstract

Novel tin-oxide (SnO(2))-coated single-walled carbon nanotube (SWNT) bundles supporting platinum (Pt) electrocatalysts for ethanol oxidation were developed for direct ethanol fuel cells. SnO(2)-coated SWNT (SnO(2)-SWNT) bundles were synthesized by a simple chemical-solution route. SnO(2)-SWNT bundles supporting Pt (Pt/SnO(2)-SWNTs) electrocatalysts and SWNT-supported Pt (Pt/SWNT) electrocatalysts were prepared by an ethylene glycol reduction method. The catalysts were physically characterized using TGA, XRD and TEM and electrochemically evaluated through cyclic voltammetry experiments. The Pt/SnO(2)-SWNTs showed greatly enhanced electrocatalytic activity for ethanol oxidation in acid medium, compared to the Pt/SWNT. The optimal SnO(2) loading of Pt/SnO(2)-SWNT catalysts with respect to specific catalytic activity for ethanol oxidation was also investigated.

Electrochemical fabrication of long-term stable Pt-loaded PEDOT/graphene composites for ethanol electrooxidation

“…9, the forward peak current density (390 A g À1 ) on the Pt/PEDOT/ER-GO is 5 times greater than that of bare Pt/GC electrode. According to the previous reports [44,45], the forward peak current densities on Pt/C and Pt/CNTs are 300 A g À1 and 350 A g À1 , respectively.…”

Design and development of non‐perfluorinated ionic polymer metal composite‐based flexible link manipulator for robotics assembly

“…Due to the sulfonation of PVA, the intensity of the diffraction pattern for PVA is decreased [48]. Moreover, the XRD peaks obtained at 2θ = 38.65, 45.36, and 68.11 correspond to the presence of Pt particles [49,50]. The presence of small peaks of 2θ values of Pt suggests that these particles were deeply embedded on the surface of the developed IPMC membrane.…”

Promotion of PdCu/C Catalysts for Ethanol Oxidation in Alkaline Solution by SnO2 Modifier

“…It has been reported that SnO 2 exactly acts as the modifier for the enhancement of the electrochemical surface area (ECSA), and an appropriate amount of SnO 2 can reliably promote EOR performance. [21,38,39] For the PdCuSn 20 sample, the surface Sn and SnO 2 composition is 1.5 and 62.5 %, respectively, suggesting that a great amount of SnO 2 on the surface may block the active site of the catalysts, hence retarding the EOR activity of the catalysts. In terms of PdCuSn 10 and PdCuSn 15 , an appropriate amount of SnO 2 on the surface may slightly enhance the I f /I b ratio.…”