Nanostructured Catalysts for Electro- and Photocatalytic Energy Conversion: Design Strategies, Mechanistic...

Area of Science:

• Catalysis
• Materials Science
• Energy Conversion

Background:

• Nanostructured catalysts are crucial for electrocatalysis and photocatalysis.
• Translating lab-scale catalyst performance to industrial applications is a significant challenge.

Purpose of the Study:

• To critically assess the development trajectory of nanostructured catalysts from design to application.
• To identify key obstacles and propose future research directions for industrial catalyst implementation.

Main Methods:

• Systematic review of five major catalyst classes (monometallic, alloy, compound, composite, single-atom).
• Analysis of synthetic strategies (hydrothermal, electrodeposition, MOF-derived, pyrolysis, defect engineering).
• Evaluation of reaction mechanisms and performance descriptors for HER, OER, ORR, urea oxidation, water splitting, and CO2 reduction.

Main Results:

• Identified five core strategies for catalyst improvement: morphology control, doping, heterostructure engineering, defect engineering, and support modification.
• Evaluated applications in water splitting, CO2 valorization, fuel cells, batteries, and electrolysis, emphasizing earth-abundant alternatives.
• Argued that catalyst stability under industrial conditions (high current density, impurities, long-term operation) is now the primary bottleneck, not intrinsic activity.

Conclusions:

• The field must shift focus from intrinsic activity to robust performance under harsh, industrially relevant conditions.
• Addressing challenges in stability and long-term operation is crucial for the industrial application of nanostructured catalysts.
• Future research should prioritize practical directions for overcoming industrialization hurdles.