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Type: Journal article
Title: Hierarchically porous nitrogen-doped graphene-NiCo₂O₄ hybrid paper as an advanced electrocatalytic water-splitting material
Other Titles: Hierarchically porous nitrogen-doped graphene-NiCo(2)O(4) hybrid paper as an advanced electrocatalytic water-splitting material
Author: Chen, S.
Qiao, S.
Citation: ACS Nano, 2013; 7(11):10190-10196
Publisher: American Chemical Society
Issue Date: 2013
ISSN: 1936-0851
Statement of
Sheng Chen and Shi-Zhang Qiao
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 NiCo₂O₄and 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.
Keywords: hierarchical porous structure; nitrogen-doped graphene; ternary metal oxides; oxygen evolution; synergistic effect
Description: Publication Date (Web): October 3, 2013
Rights: © 2013 American Chemical Society
DOI: 10.1021/nn404444r
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Chemical Engineering publications

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