NDLI: Bifunctional catalysts of Co$_{3}$O$_{4}$@GCN tubular nanostructured (TNS) hybrids for oxygen and hydrogen evolution reactions

Content Provider	Springer Nature Link
Author	Tahir, Muhammad Mahmood, Nasir Zhang, Xiaoxue Mahmood, Tariq Butt, Faheem. K. Aslam, Imran Tanveer, M. Idrees, Faryal Khalid, Syed Shakir, Imran Yan, Yiming Zou, Jijun Cao, Chuanbao Hou, Yanglong
Copyright Year	2015
Abstract	Catalysts for oxygen and hydrogen evolution reactions (OER/HER) are at the heart of renewable green energy sources such as water splitting. Although incredible efforts have been made to develop efficient catalysts for OER and HER, great challenges still remain in the development of bifunctional catalysts. Here, we report a novel hybrid of Co$_{3}$O$_{4}$ embedded in tubular nanostructures of graphitic carbon nitride (GCN) and synthesized through a facile, large-scale chemical method at low temperature. Strong synergistic effects between Co$_{3}$O$_{4}$ and GCN resulted in excellent performance as a bifunctional catalyst for OER and HER. The high surface area, unique tubular nanostructure, and composition of the hybrid made all redox sites easily available for catalysis and provided faster ionic and electronic conduction. The Co$_{3}$O$_{4}$@GCN tubular nanostructured (TNS) hybrid exhibited the lowest overpotential (0.12 V) and excellent current density (147 mA/cm$^{2}$) in OER, better than benchmarks IrO$_{2}$ and RuO$_{2}$, and with superior durability in alkaline media. Furthermore, the Co$_{3}$O$_{4}$@GCN TNS hybrid demonstrated excellent performance in HER, with a much lower onset and overpotential, and a stable current density. It is expected that the Co$_{3}$O$_{4}$@GCN TNS hybrid developed in this study will be an attractive alternative to noble metals catalysts in large scale water splitting and fuel cells.
Starting Page	3725
Ending Page	3736
Page Count	12
File Format	PDF
ISSN	19980124
Journal	Nano Research
Volume Number	8
Issue Number	11
e-ISSN	19980000
Language	English
Publisher	Tsinghua University Press
Publisher Date	2015-10-01
Publisher Place	Beijing
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	carbon nitride cobalt oxide bifunctional catalyst oxygen evolution reaction hydrogen evolution reaction Nanotechnology Materials Science Atomic/Molecular Structure and Spectra Condensed Matter Physics Biotechnology Biomedicine general
Content Type	Text
Resource Type	Article
Subject	Nanoscience and Nanotechnology Atomic and Molecular Physics, and Optics Condensed Matter Physics Electrical and Electronic Engineering

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