Electrocatalytic hydrogen evolution by cobalt(Ⅲ) triphenyl corrole bearing different number of trifluoromethyl groups

作者：Hao, Jia-Xin; Liu, Zhen-Wu; Xu, Shi-Yin; Si, Li-Ping^*; Wang, Li-Ming; Liu, Hai-Yang

来源：Inorganica Chimica Acta, 2024, 564: 121967.

DOI：10.1016/j.ica.2024.121967

• Corroles
• Electrocatalytic
• Electron withdrawing group
• Hydrogen evolution reactions
• Hydrogen production method
• Hydrogen-evolution
• Proton source
• Steric hindrances
• Trifluoromethyl group
• ]+ catalyst

Hydrogen production from electrolyzing water is known as the most promising hydrogen production method. To further understand the effect of steric hindrance and electron-withdrawing groups on catalysts, four cobalt triphenyl corroles bearing different number of ortho-trifluoromethyls (1, 2, 3, 4) had been synthesized and used as hydrogen evolution electrocatalysts. These cobalt corroles showed effective electrocatalytic hydrogen evolution activity in organic medium and neutral aqueous medium, with turnover frequency ranging from 100 s?1to 220 s?1using 32 equivalents of trifluoroacetic acid proton source in DMF. The electrocatalytic HER goes via competitive ECEC or EECC pathway depending on the used proton source. The electrocatalytic HER activity varies obviously with the number of the peripheral ortho- groups. This work is helpful for the design of new metal corrole HER electrocatalyst.
? 2024 Elsevier B.V.

• 单位
  佛山科学技术学院; 华南理工大学