Ultrathin MoS2 wrapped N-doped carbon-coated cobalt nanospheres for OER applications

Literature Information

Publication Date 2020-12-10
DOI 10.1039/D0SE01543A
Impact Factor 6.367
Authors

Ashish Gaur, Parrydeep K. Sachdeva, Rajinder Kumar, Takahiro Maruyama, Chandan Bera, Vivek Bagchi


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Abstract

The possibilities to resolve the exponential increase in energy demand using water splitting have also triggered huge worldwide attention towards the oxygen evolution reaction using an efficient, earth-abundant and low-cost electrocatalyst. Transition metal sulfides have been established as an excellent hydrogen evolution reaction catalyst but their oxygen evolution reaction behaviour is still little explored and needs further investigations. The oxygen evolution reaction has huge potential for fuel cell and metal–air battery applications. Herein MoS2 nanolayers having interlayer spacing were hierarchically grown over N-doped carbon wrapped cobalt nanospheres derived from a cobalt-based metal–organic framework. The catalyst Co@NC@MoS2 has a low overpotential of 297 mV vs. RHE at a 10 mA cm−2 current density. The catalyst has long term stability with a Tafel slope value of 70 mV dec−1. A chronoamperometric study for more than 10 hours does not show any significant change in the current density of the catalyst.

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