碳化温度对CF/Pd催化剂电催化氧化甲醇性能的影响

摘要/Abstract

摘要： 为了探究碳化温度对CF/Pd催化剂电催化氧化甲醇性能的影响,本文采用静电纺丝-热处理碳化-浸渍法制备了一系列CF/Pd催化剂,碳化温度分别设定为800、1 000和1 200 ℃,并对所得CF/Pd催化剂样品进行了微观形貌表征、成分分析及电化学测试。研究发现,800 ℃时,PAN/CA纤维已完全碳化,但随着碳化温度的升高,CF/Pd催化剂的纤维化程度逐渐降低,黏结现象逐渐明显,电催化氧化甲醇性能呈现先增加后降低的趋势。当碳化温度为1 000 ℃时,CF/Pd催化剂的电催化氧化甲醇性能最佳,其催化活性是商用Pd/C催化剂的5.4倍,稳定性是商用Pd/C催化剂的16.2倍。

关键词: 碳纤维, 催化剂, Pd, 碳化温度, 甲醇, 甲醇燃料电池, 电催化氧化

Abstract: In order to investigate the effect of carbonization temperature on the electrocatalytic performance of CF/Pd catalysts for methanol oxidation, a series of CF/Pd catalysts were prepared by electrospinning heat treatment carbonization impregnation method. The carbonization temperatures were set at 800, 1 000, and 1 200 ℃, respectively. The obtained CF/Pd catalyst samples were characterized by microscopic morphology, composition analysis, and electrochemical testing. Research has found that at 800 ℃, PAN/CA fibers have completely carbonized, but as the carbonization temperature increases, the degree of fibrosis of CF/Pd catalysts gradually decreases, and the bonding phenomenon becomes more obvious. The electrocatalytic performance of methanol oxidation shows a trend of first increasing and then decreasing. When the carbonization temperature is 1 000 ℃, the CF/Pd catalyst has the best electrocatalytic performance for methanol oxidation, with a catalytic activity 5.4 times that of commercial Pd/C catalysts and a stability 16.2 times that of commercial Pd/C catalysts.

Key words: carbon fiber, catalyst, Pd, carbonization temperature, methanol, methanol fuel cell, electrocatalytic oxidation

中图分类号:

王晨星, 刘禹松, 胡泳池, 胡家俊, 赵钰淳, 宋旭辉, 宋衍滟. 碳化温度对CF/Pd催化剂电催化氧化甲醇性能的影响[J]. 人工晶体学报, 2024, 53(4): 721-729.

WANG Chenxing, LIU Yusong, HU Yongchi, HU Jiajun, ZHAO Yuchun, SONG Xuhui, SONG Yanyan. Effect of Carbonization Temperature on Electrocatalytic Oxidation Methanol Performance of CF/Pd Catalysts[J]. JOURNAL OF SYNTHETIC CRYSTALS, 2024, 53(4): 721-729.

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