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Hierarchically Porous Nitrogen-Doped Graphene–NiCo2O4 Hybrid Paper as an Advanced Electrocatalytic Water-Splitting Material
Abstract
In this work, we report a three-dimensional (3D) oxygen evolution reaction (OER) catalyst with hierarchical pores for water splitting. The remarkable features of well-developed in- and out-of-plane pores, 3D conductive networks, and N-doping have greatly promoted the transport in electrodes and assured high catalytic efficiency. The 3D hybrid paper of N-doped graphene-NiCo2O4 has shown a remarkable OER catalytic activity that was comparable to that of previously reported noble metal catalysts (IrO2). The catalytic process occurred with favorable kinetics and strong durability. The dual-active-site mechanism is responsible for the excellent performance of the hybrid catalyst; that is, the edges of NiCo2O4 and the N (O)-metal (Ni or Co) bonds are both active sites. This study affords a new strategy to achieve optimal performance in 3D catalysts, which may be extended to the preparation of other 3D hybrid materials for a broad range of technological applications.
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Metadata
- Authors
- Chen, S., & Qiao, S.-Z.
- Venue
- ACS Nano
- Publisher
- American Chemical Society (ACS)
- Published
- 2013-10-07
- Volume
- 7
- Issue
- 11
- Pages
- 10190-10196
- ISSN
- 1936-0851 (ISSN-L)
- 1936-086X
- OpenAlex
- W2089375437
- Cited by
- 549
- References
- 34
- FWCI
- 22.00
- Type
- journal article
- Language
- en
- Open access
- closed
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