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Direct synthesis of bifunctional nanorods from Co-Adenine-MoO3 hybrid for overall water splitting

Abstract

Transition-metal carbides have been proven to be efficient catalysts for hydrogen evolution reaction (HER), however, their application as bifunctional electrocatalyst towards HER and oxygen evolution reaction (OER) altogether remains a significant challenge. Herein, we report a unique heterostructures comprising cobalt-doped molybdenum-carbide (Co-Mo2C) nanorods encapsulated in nitrogen-doped graphitic carbon shell (NGCS) through one-step pyrolysis of a Co-Adenine-MoO3 hybrid. The as-synthesized Co-Mo2C@NGCS heterostructures could be directly used as catalyst for overall water splitting. Low overpotentials of 161 and 360 mV are needed for HER and OER to reach 10 mA·cm-2, and the corresponding Tafel slopes are just 60 and 54 mV dec-1, respectively. Theoretical simulations implied that the synergistic effects between the cobalt heteroatoms, NGCS and Mo2C resulted in the enhanced catalytic performance. Our work not only provides a facile method to construct hybrid electrocatalyst with inexpensive metals, but also gives new insights into the mechanism of HER and OER in alkaline media.

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Publication details

The article was received on 09 Oct 2019, accepted on 30 Nov 2019 and first published on 02 Dec 2019


Article type: Research Article
DOI: 10.1039/C9QM00626E
Mater. Chem. Front., 2019, Accepted Manuscript

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    Direct synthesis of bifunctional nanorods from Co-Adenine-MoO3 hybrid for overall water splitting

    A. Jiang, W. Zhang, Z. Wang, N. P. Nidamanuri, Q. Li, X. C. Zeng and M. Dong, Mater. Chem. Front., 2019, Accepted Manuscript , DOI: 10.1039/C9QM00626E

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