纳米三氧化钨复合催化剂的制备及对甲醇电催化性能

doi:10.3866/PKU.WHXB201304121

Abstract

Abstract:

Nano-WO₃ modified carbon nanotube supported Pt nanoparticles (Pt/WO₃-CNTs) with uniform dimension were prepared by impregnated precipitation method, and Pt nanoparticles were loaded on the surface of WO₃-CNTs by means of microwave-assisted glycol method. X-ray powder diffraction (XRD) and transmission electron microscopy (TEM) reveal that the Pt nanoparticles have a face-centered cubic crystal structure and are highly dispersed on the surface of WO₃-modified CNTs with a narrow size distribution between 3 and 5 nm. X-ray photoelectron spectroscopy (XPS) shows that more metallic Pt is present on Pt/ WO₃-CNTs than on Pt/CNTs catalyst. Compared with the Pt/CNTs catalyst without WO₃ modification, the Pt/ WO₃-CNTs composite catalyst not only shows relative large electrochemical active surface area, high catalyst activity toward methanol electro-oxidation, but also exhibits very high stability with apparent antiposion tolerance to the incomplete oxidized species during methanol oxidation.

Key words: Direct methanol fuel cell, Carbon nanotube, Tungsten trioxide, Electro-catalysis

ZHOU Yang, LIU Wei-Ming, HU Xian-Chao, CHU You-Qun, MA Chun-An. Nano-WO₃ Composite Materials as Electro-Catalyst for Methanol Oxidation[J]. Acta Phys. -Chim. Sin. 2013, 29(07), 1487-1493. doi: 10.3866/PKU.WHXB201304121

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Nano-WO₃ Composite Materials as Electro-Catalyst for Methanol Oxidation

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