Research Article

|

2021, 14(9): 3329–3336

|

https://doi.org/10.1007/s12274-021-3358-3

Carbon-supported layered double hydroxide nanodots for efficient oxygen evolution: Active site identification and activity enhancement

Shenlong Zhao1,3,§, Detao Zhang2,4,§, Shuai Jiang5, Yanglansen Cui6, Haijing Li5, Juncai Dong5, Zhirun Xie6, Da-Wei Wang6, Rose Amal6, Zhenhai Xia4, and Liming Dai1 (✉)

View Author's information

1 Australian Carbon Materials Centre (A-CMC), School of Chemical Engineering, The University of New South Wales, Sydney, NSW 2052, Australia
2 Center of Advanced Science and Engineering for Carbon (Case4Carbon), Department of Macromolecular Science and Engineering, Case Western Reserve University (CWRU), 10900 Euclid Avenue, Cleveland, OH 44106, USA
3 School of Chemical and Biomolecular Engineering, The University of Sydney, Sydney, NSW 2006, Australia
4 Department of Materials Science and Engineering, University of North Texas, Denton, TX 76203, USA
5 Beijing Synchrotron Radiation Facility, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China
6 School of Chemical Engineering, The University of New South Wales, Sydney, NSW 2052, Australia
§ Shenlong Zhao and Detao Zhang contributed equally to this work.

Keywords: carbon nanomaterials, layered double hydroxide (LDH) nanodots, metal-organic framework (MOF) derivatives, oxygen evolution reaction
Full article PDF
Cite this article(Endnote)
Share this article
Metric

views: 288

Citations: 0

  • Abstract
  • References
  • Electronic Supplementary Material
In this study, we developed a novel confinement-synthesis approach to layered double hydroxide nanodots (LDH-NDs) anchored on carbon nanoparticles, which formed a three-dimensional (3D) interconnected network within a porous carbon support derived from pyrolysis of metal-organic frameworks (C-MOF). The resultant LDH-NDs@C-MOF nonprecious metal catalysts were demonstrated to exhibit super-high catalytic performance for oxygen evolution reaction (OER) with excellent operation stability and low overpotential (~ 230 mV) at an exchange current density of 10 mA·cm−2. The observed overpotential for the LDH-NDs@C-MOF is much lower than that of large-sized LDH nanosheets (321 mV), pure carbonized MOF (411 mV), and even commercial RuO2 (281 mV). X-ray absorption measurements and density functional theory (DFT) calculations revealed partial charge transfer from Fe3+ through an O bridge to Ni2+ at the edge of LDH-NDs supported by C-MOF to produce the optimal binding energies for OER intermediates. This, coupled with a large number of exposed active sides and efficient charge and electrolyte/reactant/product transports associated with the porous 3D C-MOF support, significantly boosted the OER performance of the LDH-ND catalyst with respect to its nanosheet counterpart. Apart from the fact that this is the first active side identification for LDH-ND OER catalysts, this work provides a general strategy to enhance activities of nanosheet catalysts by converting them into edge-rich nanodots to be supported by 3D porous carbon architectures.
Related Article
Cite this article

Carbon-supported layered double hydroxide nanodots for efficient oxygen evolution: Active site identification and activity enhancement. Nano Res. 2021, 14(9): 3329–3336 https://doi.org/10.1007/s12274-021-3358-3

Download citation