连续管道微波技术制备Pt/C催化剂及其氧还原性能

doi:10.16085/j.issn.1000-6613.2022-0305

摘要/Abstract

摘要：

传统的燃料电池催化剂合成方法除了反应过程不可控外，反应时间长，生产的催化剂难以保证一致性且耐久性差。由此，本文开发了一种快速、简单、生产一致性好的连续管道微波制备技术，该技术采用传统的乙二醇还原氯铂酸的方法，以1400℃高温处理的炭黑为碳载体制备合成铂载量为50%（质量分数）的催化剂。制备的 Pt/C-1400催化剂的半波电位超过0.9V。在参考可逆氢电极为1.0~1.5V的高电位范围内经过20000次循环伏安碳载体衰减实验，Pt/C-1400催化剂的电化学活性表面积的保留率可达79%，质量比活性的保留率高达85%，表现出了显著的抗腐蚀性和优异的耐久性，为高耐久性催化剂的生产提供了一条有效可行的途径。

关键词: 燃料电池, 碳载体, 催化剂, 活性, 稳定性

Abstract:

Traditional preparation of Fuel cell catalyst is uncontrollable and takes long reaction time, and the produced catalyst has poor consistency and durability. In this work, a rapid, simple and consistent continuous pipeline microwave method for catalyst preparation was developed. Traditional ethylene glycol reduction of chloroplatinic acid was used to prepare catalyst with 50%(mass) platinum capacity using carbon black treated at 1400℃ as carbon carrier. The half-wave potential of Pt/C-1400 catalyst is more than 0.9V. After 20000 cyclic voltammetry decay tests of carbon carrier in the high potential range of 1.0—1.5V for the reference reversible hydrogen electrode, the retention rate of the electrochemically active surface area and the mass specific activity of Pt/C-1400 catalyst are up to 79% and 85%, respectively, showing its significant corrosion resistance and excellent durability. This work provides an effective and feasible way for the production of high durability catalyst.

Key words: fuel cells, carbon support, catalyst, activity, stability

中图分类号:

TM911.4

冯占雄, 汪云, 马强, 张创, 王诚. 连续管道微波技术制备Pt/C催化剂及其氧还原性能[J]. 化工进展, 2022, 41(12): 6377-6384.

FENG Zhanxiong, WANG Yun, MA Qiang, ZHANG Chuang, WANG Cheng. Preparation of Pt/C catalyst by continuous pipeline microwave technology and its oxygen reduction performance[J]. Chemical Industry and Engineering Progress, 2022, 41(12): 6377-6384.

图/表 8

图1 循环测试前催化剂TEM图

图2 XRD和Raman表征分析图

图3 碳载体BET表征分析图

图4 催化剂的XPS表征分析图

图5 Pt/C、Pt/C-1400和TKK-50%催化剂循环测试CV和LSV曲线图

图6 Pt/C、Pt/C-1400和TKK-50%催化剂ECSA和MA结果分析图

图7 Pt/C和Pt/C-1400催化剂在100r/min、400r/min、900r/min、1600r/min、2500r/min下的LSV曲线图

图8 循环测试后催化剂TEM图

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