A Bifunctional Nanostructured RuPt/C Electrocatalyst for Energy Storage Based on the Chlor-Alkali Process

Area of Science:

• Materials Science
• Electrochemistry
• Energy Storage

Background:

• Electrochemical-based decarbonizing energy (EDEN) systems offer a dual function for energy storage and generation.
• Chlor-alkali electrolysis coupled with H2/Cl2 fuel cells presents a promising pathway for sustainable energy solutions.

Purpose of the Study:

• To design and characterize a novel electrode for an EDEN system.
• To investigate the performance of bimetallic RuPt nanoparticles as electrocatalysts in a reversible electrochemical cell.

Main Methods:

• Synthesis of bimetallic RuPt nanoparticles on Vulcan carbon (C-V) using organometallic precursors.
• Comprehensive material characterization using TEM, HAADF-STEM, EDX, XPS, and XRD.
• Performance evaluation in a 3D-printed electrochemical cell for electrolysis and fuel cell operation.

Main Results:

• The RuPt/C-V electrode functioned effectively as both anode for electrolysis and cathode for fuel cell operation.
• High coulombic efficiency (>96%) for hydrogen production was achieved.
• The system demonstrated a power output of approximately 4.5 mW·cm⁻² in H2/Cl2 fuel cell mode.

Conclusions:

• The developed RuPt/C-V electrode shows significant potential for efficient energy storage and generation in EDEN systems.
• The study highlights the viability of reversible chlor-alkali cells with advanced electrocatalysts for decarbonization.