Details

Autor(en) / Beteiligte

• Teng, Xin
• Gao, Junan
• Yang, Zuobo
• Liang, Xin
• Wu, Xiaokuan
• Yun, Jimmy
• Zhang, Jie

Titel

RuO[sub.2]@IrO[sub.2]/C Core-Shell Structure Catalyst for Efficient and Durable Acidic Oxygen Evolution

Ist Teil von

• Catalysts, 2023-11, Vol.13 (12)

Ort / Verlag

MDPI AG

Erscheinungsjahr

2023

Quelle

Elektronische Zeitschriftenbibliothek - Frei zugängliche E-Journals

Beschreibungen/Notizen

• Proton exchange membrane (PEM) water electrolysis for hydrogen production has a high current density and overall efficiency, and is a very promising hydrogen production strategy. However, its application is limited by the high anodic overpotential for oxygen evolution and the instability of catalysts. Therefore, anodic catalysts with a high activity and durability under acidic conditions need further research. Herein, we first synthesized the key intermediate Ru@Ir core-shell structures by controlling nanocrystals, then loaded them onto a carbon support and calcined to obtain a RuO[sub.2]@IrO[sub.2]/C core-shell nanocatalyst with a size smaller than 5 nm, whose activity exceeded that of commercial RuO[sub.2] and commercial IrO[sub.2]. After a 200 h stability test, the catalyst did not show significant performance degradation or structural degeneration. Finally, the prepared catalyst was assembled into a PEM electrolyzer showing the same results as the three-electrode tests, demonstrating its potential for practical applications and providing new insights for designing nanocatalysts suitable for industrialized PEM water electrolysis to produce hydrogen