Catalyst durability in electrocatalytic H₂O₂ production: key factors and challenges

Area of Science:

• Electrochemistry
• Materials Science
• Sustainable Chemistry

Background:

• Electrocatalytic hydrogen peroxide (H2O2) production via oxygen reduction reaction (ORR-2e-) is a sustainable alternative to the anthraquinone process.
• Electrocatalysts are crucial for efficient H2O2 synthesis, but harsh operating conditions degrade their performance.
• Understanding degradation mechanisms is vital for advancing on-demand H2O2 production.

Purpose of the Study:

• To systematically review design strategies and materials for electrocatalytic H2O2 production in acidic media.
• To investigate reactor conditions and factors causing catalyst deactivation.
• To propose standardized protocols for evaluating catalyst stability and durability.

Main Methods:

• Literature review of electrocatalyst design and materials for H2O2 synthesis.
• Analysis of prevalent reactor conditions and their impact on catalyst stability.
• Development of standardized benchmarking protocols, including accelerated stress tests.

Main Results:

• Identification of key design strategies and materials used in acidic electrocatalytic H2O2 production.
• Scrutiny of factors leading to catalyst deactivation under operational stress.
• Proposal of standardized protocols to assess catalyst performance and durability.

Conclusions:

• Standardized testing is essential for reliable comparison of electrocatalysts for H2O2 production.
• Accelerated stress tests are recommended for comprehensive evaluation of catalyst stability.
• Further research into robust electrocatalyst design is needed for industrial viability.