Manipulating Ru oxidation within electrospun carbon nanofibers to boost hydrogen and oxygen evolution for electrochemical overall water splitting. Issue 19 (10th August 2022)

• Record Type: Journal Article
• Authors: Zhong, Mengxiao; Yan, Su; Xu, Jiaqi; Wang, Ce; Lu, Xiaofeng
• Is Part Of: Inorganic chemistry frontiers. Volume 9:Issue 19(2022)
• Page Start: 4881
• Page End: 4891
• Publication Date: 2022-08-10
• Subjects: Chemistry, Inorganic -- Periodicals; 546.05
• DOI: 10.1039/d2qi01168a
• Languages: English
• ISSNs: 2052-1553

Abstract

Abstract : 1D bifunctional RuO2 /Ru-CNFs-350 catalyst is fabricated to show high activity and remarkable durability toward both OER and HER due to the formation of a RuO2 /Ru heterostructure and the carbon substrate. Abstract : Developing bifunctional electrocatalysts with high efficiency and prominent durability toward overall water splitting is a fascinating way to produce hydrogen for clean energy applications. In this work, partially oxidized Ru nanoparticles integrated within electrospun carbon nanofibers (RuO2 /Ru-CNFs) are prepared via a convenient electrospinning–carbonization–oxidation process. Benefitting from the small size of the active nanoparticles, the formation of a RuO2 /Ru heterostructure and the introduction of a carbon substrate, the optimized RuO2 /Ru-CNFs-350 catalyst delivers excellent OER and HER performances with ultralow overpotentials of 203 mV and 21 mV at 10 mA cm −2, respectively, along with remarkable long-term stabilities under alkaline conditions. Moreover, we constructed an alkaline overall water splitting electrolyzer with RuO2 /Ru-CNFs-350 as both the anode and cathode, achieving a low working voltage of 1.452 V at 10 mA cm −2, superior to that of the benchmark Pt/C||RuO2 couple (1.560 V). This work provides a convenient and promising route to fabricate high-performance bifunctional electrocatalysts toward water electrolysis.