· 논문명 : Electrochemical Evolution of Ru-Based Polyoxometalates into Si,W-Codoped RuOx for Acidic Overall Water Splitting

· 저    자 : Dasom Jeon, Dong Yeon Kim, Hyeongoo Kim, Nayeong Kim, Cheolmin Lee, Dong-Hwa Seo*, Jungki Ryu*

· 게재지 : Advanced Materials (2024, 36, 2304468)

· 초록

Despite intensive studies over decades, the development of electrocatalysts for acidic water splitting still relies on platinum group 

metals,especially Pt and Ir, which are scarce, expensive, and poorly sustainable. Because such problems can be alleviated, Ru-

based bifunctional catalysts such as rutile RuO2 have recently emerged. However, RuO2 has a relatively low activity for hydrogen

evolution reactions (HER) and low stability for oxygen evolution reactions (OER) under acidic conditions. In this study, the synthesis 

of a RuOx-based bifunctional catalyst (RuSiW) for acidic water splitting via the electrochemical evolution from Ru-based polyoxo-

metalates at cathodic potentials is reported. RuSiW consists of the nanocrystalline RuO2 core and Si,W-codoped RuOx shell. RuSiW 

exhibits outstanding HER and OER activity comparable to Pt/C and RuO2, respectively, with high stability. Computational analysis 

suggests that the codoping of RuOx with W and Si synergistically improves the HER activity of otherwise poor RuO2 by shifting the 

d-band center and optimizing atomic configurations beneficial for proper hydrogenadsorption. This study provides insights into the 

design and synthesis of unprecedented bifunctional electrocatalysts using catalytically inactive and less explored elements, such as 

Si and W.