Skip to main content
placeholder image

Low-Coordinate Iridium Oxide Confined on Graphitic Carbon Nitride for Highly Efficient Oxygen Evolution

Journal Article


Download full-text (Open Access)

Abstract


  • Highly active and durable electrocatalysts for the oxygen evolution reaction (OER) is greatly desired. Iridium oxide/graphitic carbon nitride (IrO2/GCN) heterostructures are designed with low-coordinate IrO2 nanoparticles (NPs) confined on superhydrophilic highly stable GCN nanosheets for efficient acidic OER. The GCN nanosheets not only ensure the homogeneous distribution and confinement of IrO2 NPs but also endows the heterostructured catalyst system with a superhydrophilic surface, which can maximize the exposure of active sites and promotes mass diffusion. The coordination number of Ir atoms is decreased owing to the strong interaction between IrO2 and GCN, leading to lattice strain and increment of electron density around Ir sites and hence modulating the attachment between the catalyst and reaction intermediates. The optimized IrO2/GCN heterostructure delivers not only by far the highest mass activity among the reported IrO2-based catalysts but also decent durability.

Authors


  •   Chen, Jiayi (external author)
  •   Cui, Peixin (external author)
  •   Zhao, Guoqiang
  •   Rui, Kun (external author)
  •   Lao, Mengmeng (external author)
  •   Chen, Yaping (external author)
  •   Zheng, Xusheng (external author)
  •   Jiang, Yinzhu (external author)
  •   Pan, Hongge (external author)
  •   Dou, Shi Xue
  •   Sun, Wenping

Publication Date


  • 2019

Citation


  • Chen, J., Cui, P., Zhao, G., Rui, K., Lao, M., Chen, Y., Zheng, X., Jiang, Y., Pan, H., Dou, S. Xue. & Sun, W. (2019). Low-Coordinate Iridium Oxide Confined on Graphitic Carbon Nitride for Highly Efficient Oxygen Evolution. Angewandte Chemie - International Edition, 58 (36), 12540-12544.

Scopus Eid


  • 2-s2.0-85070493216

Ro Full-text Url


  • https://ro.uow.edu.au/context/aiimpapers/article/4831/type/native/viewcontent

Ro Metadata Url


  • http://ro.uow.edu.au/aiimpapers/3776

Has Global Citation Frequency


Number Of Pages


  • 4

Start Page


  • 12540

End Page


  • 12544

Volume


  • 58

Issue


  • 36

Place Of Publication


  • Germany

Abstract


  • Highly active and durable electrocatalysts for the oxygen evolution reaction (OER) is greatly desired. Iridium oxide/graphitic carbon nitride (IrO2/GCN) heterostructures are designed with low-coordinate IrO2 nanoparticles (NPs) confined on superhydrophilic highly stable GCN nanosheets for efficient acidic OER. The GCN nanosheets not only ensure the homogeneous distribution and confinement of IrO2 NPs but also endows the heterostructured catalyst system with a superhydrophilic surface, which can maximize the exposure of active sites and promotes mass diffusion. The coordination number of Ir atoms is decreased owing to the strong interaction between IrO2 and GCN, leading to lattice strain and increment of electron density around Ir sites and hence modulating the attachment between the catalyst and reaction intermediates. The optimized IrO2/GCN heterostructure delivers not only by far the highest mass activity among the reported IrO2-based catalysts but also decent durability.

Authors


  •   Chen, Jiayi (external author)
  •   Cui, Peixin (external author)
  •   Zhao, Guoqiang
  •   Rui, Kun (external author)
  •   Lao, Mengmeng (external author)
  •   Chen, Yaping (external author)
  •   Zheng, Xusheng (external author)
  •   Jiang, Yinzhu (external author)
  •   Pan, Hongge (external author)
  •   Dou, Shi Xue
  •   Sun, Wenping

Publication Date


  • 2019

Citation


  • Chen, J., Cui, P., Zhao, G., Rui, K., Lao, M., Chen, Y., Zheng, X., Jiang, Y., Pan, H., Dou, S. Xue. & Sun, W. (2019). Low-Coordinate Iridium Oxide Confined on Graphitic Carbon Nitride for Highly Efficient Oxygen Evolution. Angewandte Chemie - International Edition, 58 (36), 12540-12544.

Scopus Eid


  • 2-s2.0-85070493216

Ro Full-text Url


  • https://ro.uow.edu.au/context/aiimpapers/article/4831/type/native/viewcontent

Ro Metadata Url


  • http://ro.uow.edu.au/aiimpapers/3776

Has Global Citation Frequency


Number Of Pages


  • 4

Start Page


  • 12540

End Page


  • 12544

Volume


  • 58

Issue


  • 36

Place Of Publication


  • Germany