Open and close-ended CoMoS3 nanotubes for hydrogen evolution in acidic and basic conditions

• 作者: Yuan Li Xuewei Hou Jing Gu Veronika Mikhaylova Kangli Chen Hongming Zhang Shumin Han
• 来源期刊: 能源化学
• 年，卷（期）: 2021,（6）
• 页码范围: 34-40
• 页数: 7页
• 语种: 英文

摘要

Electrochemical hydrogen evolution reaction (HER) is a promising route to harvest high-purity hydrogen (H2).Efficient and selective energy transformations rely on the development of novel catalytic materials in terms of compositions and structures that survive under harsh conditions.This study focuses on a unique nanostructured CoMoS3 catalyst for HER under strong acidic and basic electrolyte.The morphologies of the catalysts are fine-tuned by altering reaction times in a hydrothermal reaction.Limited reaction time generates twisted thin-sheet CoMoS3 (12 h),which spins into a nanotube with an extended synthetic time (16 h).As the reaction time increases to 20 h,the CoMoS3 composite creates open-ended nanotubes,facilitating reactants to penetrate and react actively in the inner space of the nanotubes.Further,prolonged reaction time (24 h) results in the formation of the close-ended CoMoS3 nanotubes.We find out that the open-ended structure plays an important role in achieving fast kinetics as well as creating more active sites in HER reaction.The catalyst delivers a profound performance under both acidic and basic conditions,with overpotentials of 93 mV and 115 mV (at a current density of 10 mA/cm2) in the acidic and basic electrolytes,respectively.Moreover,it shows superior long-term durability in both solutions.This work will provide a great foundation for understanding the morphology effect with the same composited catalyst towards energy conversion reactions,not limited to HER.