期刊
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
卷 22, 期 25, 页码 14255-14260出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/d0cp02194f
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资金
- Program for New Century Excellent Talents in Fujian Province University (Minjiaoke [2018]) [47]
- Scientific Research Project of Fujian Jiangxia University [JXZ2019004]
Water oxidation is a vital step in both natural and artificial photosynthetic processes. However, the effect of second coordination sphere for efficient oxygen evolution electrocatalysts has rarely been studied, becoming a bottleneck in many energy-related issues. In this article, the cobalt phosphonate (NH3C6H4NH3)Co-2(hedpH)(2)center dot H2O (Co-PDA) displayed decent electrocatalytic water oxidation activity in 50 mM PBS solution (pH 7.0), comparable to the activity of state-of-the-art IrO2. Moreover, it exhibited a 160 mV lower onset potential and 6 times higher TOF than those of the counterpart, (NH4)(2)Co-2(hedpH)(2)(Co-NH4+), which existed with the same Co active center, while surrounded by different ligands. The related mechanistic studydemonstrates that the ligand in Co-PDA would benefit the proton-coupled electron transfer (PCET) processes and the formation of high valence state Co(iv).
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