An efficient heterogeneous Ni/Ni₂P catalyst for urea-assisted water electrolysis

Area of Science:

• Electrochemistry
• Materials Science
• Catalysis

Background:

• Urea oxidation reaction (UOR) is crucial for sustainable energy technologies.
• Developing efficient electrocatalysts for UOR is an ongoing challenge.
• Nickel-based materials are promising for UOR but require optimization.

Purpose of the Study:

• To investigate the role of intrinsic electronic properties in urea adsorption.
• To understand the mechanism of enhanced urea oxidation on heterogeneous Ni/Ni2P.

Main Methods:

• Synthesis of heterogeneous Ni/Ni2P electrocatalyst.
• Electrochemical characterization of urea oxidation.
• Surface analysis to probe adsorption mechanisms.

Main Results:

• Heterogeneous Ni/Ni2P exhibits favorable adsorption of urea molecules.
• Built-in electrophilic/nucleophilic domains on Ni/Ni2P facilitate urea adsorption.
• Enhanced catalytic activity for urea oxidation was observed.

Conclusions:

• The electronic structure of Ni/Ni2P, specifically its electrophilic/nucleophilic domains, is key to efficient urea adsorption.
• This finding provides insights into designing advanced electrocatalysts for urea oxidation.