摘要
硫和多壁碳纳米管(MCNTs)在高温无氧条件下直接反应,在MCNTs上引入巯基基团制得巯基碳纳米管载体(MCNTs-SH)。将XC-72、MCNTs和MCNTs-SH三种载体及其制得的催化剂分别进行氧化性测试和抗反极测试。实验结果表明:相比于XC-72和MCNTs,MCNTs-SH在高电势下具有最小的腐蚀电流;相比于Pt/XC-72和Pt/MCNTs,Pt/MCNTs-SH在半电池ADT测试和恒电势氧化测试前后的ECSA衰减程度最小;在分别采用三种催化剂作为阳极的膜电极中,Pt/MCNTs-SH在1000 mA/cm2处的电压在抗反极测试前后的性能衰减程度最小。该研究结果对于PEMFC的抗氧化催化剂载体的开发具有重要意义。
Sulfur and multi-walled carbon nanotubes(MCNTs)directly reacted under high temperature and oxygenfree conditions,and thiol groups were introduced into MCNTs to thiol carbon nanotube supports(MCNTs-SH).The three supports,XC-72,MCNTs and MCNTs-SH,and their prepared catalysts were tested for oxidative activity and anti-voltage reverse,respectively.The experimental results show that MCNTs-SH has the smallest corrosion current compared with XC-72 and MCNTs;and the ECSA decay of MCNTs-SH is the smallest after the ADT test and constant potential oxidation test.Among the membrane electrodes assemblies based on the three catalysts as anodes,the voltage decay of Pt/MCNTs-SH at 1000 mA/cm~2 after the voltage reverse test is the least.The results of research are of great significance for the development of antioxidant catalyst support for PEMFC.
作者
张恩道
宋微
俞红梅
邵志刚
ZHANG Endao;SONG Wei;YU Hongmei;SHAO Zhigang(Dalian Institute of Chemical Physics,Chinese Academy of Science,Dalian Liaoning 116023,China;University of Chinese Academy of Science,Beijing 100039,China)
出处
《电源技术》
CAS
北大核心
2023年第2期234-239,共6页
Chinese Journal of Power Sources
基金
国家重点研发计划课题(2019YFB1504502)
国家自然科学基金青年基金(22179127)。
