Superior Ethanol Oxidation Electrocatalysis Enabled by Ternary Pd-Rh-Te Nanotubes

Area of Science:

• Materials Science
• Electrochemistry
• Nanotechnology

Background:

• Direct ethanol fuel cells (DEFCs) require cost-efficient electrocatalysts for practical application.
• Palladium (Pd)-based materials are promising but face challenges in activity and stability.

Purpose of the Study:

• To design and synthesize novel, cost-efficient Pd-based electrocatalysts for DEFCs.
• To investigate the electrocatalytic performance of one-dimensional (1D) PdRhTe nanotubes for the ethanol oxidation reaction (EOR).

Main Methods:

• Synthesis of 1D PdRhTe nanotubes using H2PdCl4, RhCl3, and Te nanowires as a sacrificial template.
• Electrochemical characterization including cyclic voltammetry (CV) and chronoamperometry (CA) in alkaline media.
• Physicochemical characterizations to understand material properties.

Main Results:

• The synthesized PdRhTe nanotubes exhibited a unique 1D structure.
• Achieved high specific activity (6.53 mA cm⁻²) and mass activity (2039.2 mA mg⁻¹) for EOR.
• Demonstrated superior durability with negligible activity decay compared to PdTe/C and Pd/C.

Conclusions:

• The 1D PdRhTe nanotubes show outstanding electrocatalytic performance for EOR due to their unique structure and synergistic effects.
• Rhodium incorporation enhances C-C bond cleavage and material stability.
• This work offers a new strategy for synthesizing cost-efficient electrocatalysts via a sacrificial template method.