Tunable Ru‐Ru2P heterostructures with charge redistribution for efficient pH‐universal hydrogen evolution. Issue 5 (24th January 2022)

• Record Type: Journal Article
• Authors: Chen, Ding; Yu, Ruohan; Lu, Ruihu; Pu, Zonghua; Wang, Pengyan; Zhu, Jiawei; Ji, Pengxia; Wu, Dulan; Wu, Jinsong; Zhao, Yan; Kou, Zongkui; Yu, Jun; Mu, Shichun
• Is Part Of: InfoMat. Volume 4:Issue 5(2022)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2022-01-24
• Subjects: DFT calculation -- heterostructure -- molten salt‐assisted synthesis -- pH‐universal hydrogen evolution -- ruthenium phosphide; Materials -- Periodicals; Information technology -- Periodicals; Smart materials -- Periodicals; 620.11
• DOI: 10.1002/inf2.12287
• Languages: English
• ISSNs: 2567-3165

Abstract

Abstract: Designing synergistic heterogeneous catalytic interfaces is the key to developing highly compatible pH‐universal electrocatalysts for complex chemical environments. Our theoretical calculation results demonstrate that the Ru‐Ru2 P heterointerface can not only promote the redistribution of charges, but also reduce the d ‐band center, and then enhances the adsorption capacity of the key intermediate. However, in situ and facile synthesis of Ru‐Ru2 P heterostructures is severely limited by thermodynamic obstacles. Herein, we propose a molten salt‐assisted catalytic synthesis scheme, and successfully build a series of homologous metallic Ru‐Ru2 P heterostructure catalysts with different molar ratios of Ru to P under atmospheric pressure and low‐temperature (400°C). The resultant Ru‐Ru2 P with rich heterostructures show the Pt‐like HER performance in different pH media. Particularly, it is prominent under alkaline conditions (18 mV @ 10 mA cm − 2 ), which outperforms the Pt catalyst (37 mV @ 10 mA cm − 2 ). Furthermore, Ru‐Ru2 P heterostructures also show certain potential in the electrolysis of seawater to produce hydrogen. This work represents a significant supplement of high‐efficiency pH‐universal HER catalysts, and provides a new light on interface engineering in energy technology fields and beyond. Abstract : A low‐temperature solid phase route is formulated to form controllable Ru‐Ru2 P heterointerfaces with homologous Ru where the higher electronic state crosses the Fermi level and then lowers the d ‐band center, thereby allowing the catalyst with Pt‐like pH‐universal hydrogen evolution reaction kinetics.