Volume 7 Issue 5
Oct.  2022
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Article Navigation >  Green Energy&Environment  > 2022  >  7(5): 1111-1118
Wenqing Yao, Xian Jiang, Yulian Li, Cuiting Zhao, Linfei Ding, Dongmei Sun, Yawen Tang. N-doped graphene anchored ultrasmall Ir nanoparticles as bifunctional electrocatalyst for overall water splitting. Green Energy&Environment, 2022, 7(5): 1111-1118. doi: 10.1016/j.gee.2021.01.011
Citation: Wenqing Yao, Xian Jiang, Yulian Li, Cuiting Zhao, Linfei Ding, Dongmei Sun, Yawen Tang. N-doped graphene anchored ultrasmall Ir nanoparticles as bifunctional electrocatalyst for overall water splitting. Green Energy&Environment, 2022, 7(5): 1111-1118. doi: 10.1016/j.gee.2021.01.011
shu

N-doped graphene anchored ultrasmall Ir nanoparticles as bifunctional electrocatalyst for overall water splitting

doi: 10.1016/j.gee.2021.01.011

  • a Jiangsu Key Laboratory of New Power Batteries, Jiangsu Collaborative Innovation Center of Biomedical Functional Materials, School of Chemistry and Materials Science, Nanjing Normal University, Nanjing, 210023, China;

  • b Advanced Analysis & Testing Center, Nanjing Forestry University, Nanjing, 210037, China

Funds:

This work was financially supported by the National Natural Science Foundation of China (21875112) and the Natural Science Foundation of Jiangsu Province (BK20171473). The authors are also grateful for support from the National and Local Joint Engineering Research Center of Biomedical Functional Materials and a project sponsored by the Priority Academic Program Development of Jiangsu Higher Education Institutions.

  • Received date 21 September 2020, Accepted date 08 January 2021, RevRecd date 24 December 2020, Publish date 16 January 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-2 towards 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-2 in alkaline solution, exceeding that of Pt/C and RuO2 couple (1.85 V). Thus, the as-fabricated Ir/N-rGO has a commendable prospect in the practical application of alkaline water electrocatalysis.

     

    • These authors contribute equally to this work.
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