Back to Search
Start Over
N-doped graphene anchored ultrasmall Ir nanoparticles as bifunctional electrocatalyst for overall water splitting
- Source :
- Green Energy & Environment; 20210101, Issue: Preprints
- Publication Year :
- 2021
-
Abstract
- Seeking for extremely active and durable bifunctional electrocatalysts towards the overall water splitting possesses a strategic significance on the development of sustainable and clean energy for the replacement of fossil fuels. Ir-based nanomaterials are deemed as one of the most high-efficiency oxygen evolution reaction electrocatalysts while the hydrogen evolution reaction performance is unfavorable. In this work, we report a one-pot hydrothermal synthesis of N-doped graphene anchored Ir nanoparticles (Ir/N-rGO) with ultrasmall particle size (∼2.0 nm). Apart from the predictably superior OER performance, the resultant Ir/N-rGO also displays excellent hydrogen evolution reaction (HER) performance, requiring merely 76 and 260 mV overpotentials to achieve the current density of 10 mA cm−2towards HER and OER, respectively. When applied as the bifunctional electrodes for overall water splitting, Ir/N-rGO needs a lower overpotential (1.74 V) to achieve a current density of 50 mA cm−2in alkaline solution, exceeding that of Pt/C and RuO2couple (1.85 V). Thus, the as-fabricated Ir/N-rGO has a commendable prospect in the practical application of alkaline water electrocatalysis.
Details
- Language :
- English
- ISSN :
- 24680257
- Issue :
- Preprints
- Database :
- Supplemental Index
- Journal :
- Green Energy & Environment
- Publication Type :
- Periodical
- Accession number :
- ejs55134665
- Full Text :
- https://doi.org/10.1016/j.gee.2021.01.011