Preparation method of PdAg/TiO2 nanotube direct methanol fuel cell anode catalyst

Abstract

The invention discloses a preparation method of a PdAg / TiO2 nanotube direct methanol fuel cell anode catalyst. The PdAg / TiO2 nanotube direct methanol fuel cell anode catalyst consists of a TiO2 nanotube and nano-PdAg. The method comprises the following steps of: preparing a TiO2 nanotube; and preparing a TiO2 nanotube dispersion liquid; preparing Pd / TiO2 and the like. The electric conductivity of TiO2 and the catalytic performance of TiO2 on methanol are enhanced through PdAg compounding, intermediate products such as CO and the like produced by methanol oxidation are adsorbed and transferred onto the surface of a composite catalyst and are directly oxidized into a final product, i.e., CO2 deeply, the price of PdAg is much lower than those of noble metals such as Pt, Ru and the like, and the using amount of PdAg in the catalyst is small, so that the catalytic oxidation performance of the catalyst on methanol can be enhanced greatly, the cost of the catalyst is reduced, and the CO poisoning resistance of the catalyst is enhanced.

Description

technical field [0001] The invention relates to a preparation method of an anode catalyst of a direct methanol fuel cell. Background technique [0002] Direct Methanol Fuel Cell (DMFC) has the advantages of low energy consumption, high energy density, abundant sources of methanol, low price, simple system, convenient operation and low noise, and is considered to be the most promising future vehicle power and other vehicles. Promising chemical power sources have attracted widespread attention. One of the most critical materials of DMFC is the electrode catalyst, which directly affects the performance, stability, service life and manufacturing cost of the battery. The noble metal Pt has excellent catalytic performance at low temperature (less than 80°C). At present, the electrode catalysts of DMFC all use Pt as the main component, and the PtRu catalyst has stronger CO poisoning resistance and higher catalytic activity than pure Pt. It is considered to be the best catalyst fo...

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Problems solved by technology

As reported the preparation of PtRuTiO X / C and Au / TiO 2 PtRu catalyst, TiO 2 Combination can reduce the amount of noble metal Pt in the catalyst, improve catalytic performance and anti-CO poisoning ability, but TiO 2 Composite powder as an anode catalyst for direct methanol fuel cells has not been reported yet