Ultrahigh-Current-Density and Long-Term-Durability Electrocatalysts for Water Splitting

Area of Science:

• Electrochemistry
• Materials Science
• Renewable Energy

Background:

• The hydrogen economy relies on storing renewable energy as clean hydrogen fuel via electrochemical water splitting.
• Achieving industrial-scale green hydrogen production necessitates electrocatalysts with high current densities (1000 mA cm⁻²), long durability (>1000 h), and low overpotentials (<300 mV).

Purpose of the Study:

• To review theoretical principles and design strategies for high-efficiency electrocatalysts.
• To consolidate knowledge for advancing green hydrogen technology from laboratory to commercialization.
• To address mass/charge transfer and mechanical stability challenges in electrocatalysis.

Main Methods:

• Examination of theoretical principles for high-efficiency electrocatalyst design.
• Analysis of strategies including atomic structure regulation, array configuration, and multiscale coupling.
• Review of methods to enhance electrical conductivity, reduce reaction barriers, optimize mass transfer, and improve mechanical strength.

Main Results:

• Strategies for designing electrocatalysts with superior performance metrics (current density, durability, overpotential) are presented.
• Understanding of structure-property relationships for enhanced electrocatalytic activity and stability is deepened.
• Approaches to overcome mass/charge transfer limitations and improve mechanical robustness are discussed.

Conclusions:

• High-efficiency electrocatalysts are critical for realizing the hydrogen economy.
• Further research and development are needed to bridge the gap between laboratory findings and industrial application.
• Future opportunities and challenges in green hydrogen production are highlighted.