- Exploring efficient and inexpensive electrocatalysts for the oxidation of water is of great importance for various electrochemical energy
storage and conversion technologies. In the present study, a new water-soluble [Ce
III(DMF) (HSO4)3] complex was synthesized and characterized
by UV−vis, photoluminescence, and high-resolution X-ray photoelectron spectroscopy techniques. Owing to classic 5d →4f transitions, an intense
photoluminescence in the UV region was observed from the water-soluble [CeIII(DMF)(HSO4)3] complex. A stacking electrode was designed where
self-assembled L-cysteine monolayer modified gold was immobilized with the synthesized cerium complex and was characterized by scanning electron microscopy, electrochemical impedance spectroscopy, and cyclic voltam-metry. The resulting electrode, i.e., [CeIII(DMF)(HSO4)3]−L-cysteine-Au
stacks shows high electrocatalytic water oxidation behavior at an
overpotential of η ≈0.34 V under neutral pH conditions. We also demonstrated a way where the overpotential is possible toExploring efficient and inexpensive electrocatalysts for the oxidation of water is of great importance for various electrochemical energy
storage and conversion technologies. In the present study, a new water-soluble [Ce
III(DMF) (HSO4)3] complex was synthesized and characterized
by UV−vis, photoluminescence, and high-resolution X-ray photoelectron spectroscopy techniques. Owing to classic 5d →4f transitions, an intense
photoluminescence in the UV region was observed from the water-soluble [CeIII(DMF)(HSO4)3] complex. A stacking electrode was designed where
self-assembled L-cysteine monolayer modified gold was immobilized with the synthesized cerium complex and was characterized by scanning electron microscopy, electrochemical impedance spectroscopy, and cyclic voltam-metry. The resulting electrode, i.e., [CeIII(DMF)(HSO4)3]−L-cysteine-Au
stacks shows high electrocatalytic water oxidation behavior at an
overpotential of η ≈0.34 V under neutral pH conditions. We also demonstrated a way where the overpotential is possible to decrease upon irradiation of UV light.…