Journal
ACS APPLIED ENERGY MATERIALS
Volume 1, Issue 10, Pages 5140-5144Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsaem.8b01229
Keywords
metal-organic frameworks; nanoparticle; oxygen evolution reaction; overpotential; electrocatalysis
Funding
- National Natural Science Foundation of China [51672251]
- Science Foundation of Zhejiang Sci-Tech University (ZSTU) [13012138-Y]
- Welch Foundation
- Qanjiang Talents Plan of Zhejiang Province [QJD1502019]
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Metal-organic frameworks (MOFs) are promising platform materials for the electrocatalytic oxygen evolution reaction (OER). Here, Hofmann MOFs are applied as platforms to study the interaction between different metal elements and their influence on the OER activity. In all the MOFs, the Fe/Co mixed Hofmann MOF (CoFe-PYZ) demonstrates the lowest overpotential of 300 mV at 10 mA cm(-2) in alkaline conditions (pH = 13). The Tafel slope of (CoFe-PYZ) is 44 mV dec(-1). The enhanced catalytic activity is mainly attributed to the synergistic effects between Co2+ and Fe2+ ions, which is confirmed via XPS and density-functional theory (DFT) calculations.
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