• Outperforming water electrolysis through catalyst layer structuring with defective 2D mesoporous carbon
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  • 2026-06-01 10:32:39|
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ㅇ [Title]         Outperforming water electrolysis through catalyst layer structuring with defective 2D mesoporous carbon

  

ㅇ [Journal]    Joule


                                                                         
ㅇ [Author]     Jaeho Byeon, Minkyeong Ban, Liangliang Xu, Seunggeon Lee, Seongbeen Kim, Seonggyu Lee, Seongmin Shin, Donghyeok Son, Wonchul Park, Jinkyu Park,
                       
                             Hoyoung Kim, Dongyoon Woo, Seongseop Kim, Dong Young Chung, Jaewook Nam, Jang Yong Lee*, Sungjun Kim*, Jinwoo Lee*



 


ㅇ [Abstrct]


Anion exchange membrane water electrolysis (AEMWE) enables cost-effective hydrogen production, yet the sluggish hydrogen evolution reaction (HER) kinetics and transport

limitations at high current densities remain critical challenges. We present a comprehensive strategy to overcome these challenges by developing a Ru nanocluster catalyst

supported on 2D mesoporous carbon nanosheets (Ru/MNS) with defect-induced Ru–C bond formation. The Ru–C bond formation optimally tunes HER intermediate binding,

achieving an ultralow overpotential of 5.9 mV at 10 mA cm−2, while the unique 2D mesoporous architecture significantly reduces ion and transport resistances. These

synergistic enhancements enable state-of-the-art AEMWE performance, delivering 17.1 A cm−2 at 2.0 V and maintaining stability for 1,000 h at 1.0 A cm−2 with only 0.09

mgRu cm−2. Notably, in a 25 cm2 scale-up membrane electrode assembly, it maintains 1.710 V at 3.0 A cm−2, closely matching 5 cm2 cell performance. This work highlights

Ru/MNS as a promising catalyst for high-efficiency, scalable water electrolysis.



 
 










 
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