Journal
MATERIALS CHARACTERIZATION
Volume 177, Issue -, Pages -Publisher
ELSEVIER SCIENCE INC
DOI: 10.1016/j.matchar.2021.111201
Keywords
Porous reticular heterostructure; Ru; RuO2-PRS; Oxygen evolution reaction; Excellent catalytic activity and durability; Acid and alkaline media
Categories
Funding
- Shenzhen Basic Research Project [JCYJ20170818092720054, JCYJ20190808145203535, JCYJ20190808144413257]
- National Natural Science Foundation of China [21671136]
- Postdoctoral Science Foundation of China [2019M663085]
- Major Programs for Science and Technology Development of Shenzhen [JSGG20160328151657828, XCL201110060]
- Major Industrial Projects of Shenzhen [s2017001850011]
- Project of the Natural Science Foundation of Guangdong Province [2020A1515010379]
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The facile construction of Ru/RuO2 composite with porous reticular structure (Ru/RuO2-PRS) by controllable pyrolysis of Ru3+ coordinated cyanoguanidine was presented for oxygen evolution reaction (OER). The Ru/RuO2 heterostructure in Ru/RuO2-PRS provides improved OER activity with lower onset potential and overpotential, as well as enhanced durability by relieving the dissolution of RuO2 at high anodic potential, especially in acidic electrolyte. This study offers a new strategy to enhance the OER application in acidic solution.
A facile construction of Ru/RuO2 composite with porous reticular structure (denoted as Ru/RuO2-PRS) by controllable pyrolysis of Ru3+ coordinated cyanoguanidine was presented for oxygen evolution reaction (OER). The Ru/RuO2 heterostructure was identified in Ru/RuO2-PRS. Taking the advantages of the Ru/RuO2 heterostructure and large specific surface area, Ru/RuO2-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 RuO2 porous powder and RuO2 nano-particles counterparts in both acidic and alkaline solution. Specifically, Ru/RuO2-PRS exhibits much improved durability because the unique Ru/RuO2 heterostructure relieves the dissolution of RuO2 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.
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