Prof. Wenjea TsengTaiwan
國立中興大學
| 2004 to present | | Professor, Department of Materials Science and Engineering, National Chung Hsing University |
| 2004 - | | Professor, Department of Materials Science and Engineering, National Chung Hsing University |
| 2002 - 2004 | | Associate Professor, Department of Materials Science and Engineering, National Chung Hsing University |
Advanced ceramics, Colloidal processing, Gas sensors, Catalysts
Electronic and Structural Modulation of Co3CuN Anti-Perovskites via Zn-Substitution for Enhanced Oxygen Evolution Catalysis
TBA TBA
Functional Ceramics/TBA
This study investigates the strategic substitution of zinc (Zn) into the Co3CuN anti-perovskite lattice to modulate its electrocatalytic activity for the oxygen evolution reaction (OER). A series of self-supported Co3Cu1-xZnxN (x = 0–0.6) catalysts were synthesized on three-dimensional nickel foam using a combined hydrothermal-ammonolysis approach. Structural characterization confirms that the cubic anti-perovskite framework remains robust upon Zn incorporation, despite significant electronic reconfiguration. High-resolution X-ray photoelectron spectroscopy (XPS) reveals a pronounced positive shift in core-level binding energies—reaching 0.88 eV for Co3Cu0.6Zn0.4N and 1.43 eV for Co3Cu0.4Zn0.6N. These shifts indicate increased electron localization and a corresponding depletion of electron density at the Cu sites, which optimizes the adsorption strength of oxygenated intermediates. The optimized composition, Co3Cu0.6Zn0.4N, exhibits superior OER kinetics, requiring an overpotential of only 285 mV to reach 10 mA/cm2 in 1 M KOH—an 11% improvement over pristine Co3CuN and outperforming commercial IrO2 (307 mV).