1. The construction of stable Ru/RuO2 porous reticular heterostructure with highly efficient electrocatalytic activity for oxygen evolution reaction.
- Author
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Hu, Jing, Fu, Yonghuan, Yang, Penggang, Guo, Licheng, Ye, Shenghua, Ren, Xiangzhong, He, Chuanxin, Zhang, Qianling, and Liu, Jianhong
- Subjects
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OXYGEN evolution reactions , *HYDROGEN evolution reactions , *ANODIC oxidation of metals , *ALKALINE solutions , *CALCINATION (Heat treatment) , *NANOPARTICLES , *SULFURIC acid , *SURFACE area - Abstract
A facile construction of Ru/RuO 2 composite with porous reticular structure (denoted as Ru/RuO 2 -PRS) by controllable pyrolysis of Ru3+ coordinated cyanoguanidine was presented for oxygen evolution reaction (OER). The Ru/RuO 2 heterostructure was identified in Ru/RuO 2 -PRS. Taking the advantages of the Ru/RuO 2 heterostructure and large specific surface area, Ru/RuO 2 -PRS exhibits much more improved OER activity with much lower onset potential and overpotential to reach the current density of 10 mA cm−2 compared with RuO 2 porous powder and RuO 2 nano-particles counterparts in both acidic and alkaline solution. Specifically, Ru/RuO 2 -PRS exhibits much improved durability because the unique Ru/RuO 2 heterostructure relieves the dissolution of RuO 2 at high anodic potential that has been the bottleneck of Ru-based catalysts for OER, especially in acidic electrolyte. This study provides a new strategy to promote the OER application in acidic solution. • We present a facile one-step calcination method to synthesize 3D porous reticular structure of Ru/RuO 2 (Ru/RuO 2 -PRS). • The as prepared Ru/RuO 2 -PRS presents abundant Ru/RuO 2 heterostructure, which benefits to the electrocatalytic process. • Ru/RuO 2 -PRS exhibits excellent OER activity and stability in both acid and alkaline electrolyte. [ABSTRACT FROM AUTHOR]
- Published
- 2021
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