壳聚糖对Pd/C乙醇氧化性能的影响

Effect of chitosan on performance of Pd /C for ethanol oxidation

以壳聚糖(Chitosan)修饰的炭黑为载体,用微波辅助法制备Pd/C-Chit电催化剂,考察了壳聚糖的引入对Pd在炭黑上的分散效果及电催化性能的影响。壳聚糖的引入改善了Pd粒子的分散性,乙醇氧化反应的电流密度从143 mA/cm2提高到155 mA/cm2,乙醇氧化的起始电位从-0.481 V负移到-0.515 V,动力学性能得到改进。

Pd/C-Chit electrocatalyst was prepared through the microwave-assisted synthesis method, chitosan modified carbon black was used as supporter; the influences of the addition of chitosan to the dispersion effect of Pd on carbon black and catalytic performance were investigated. The addition of chitosan improved the distribution of Pd nanoparticles on the carbon support and increased the current density of the ethanol oxidation reaction from 143 mA/cm2 to 155 mA/cm2. The onset potential of ethanol oxidation shifted negatively from -0. 481 V to -0. 515 V, the dynamic performance was improved.