Journal
SURFACE & COATINGS TECHNOLOGY
Volume 347, Issue -, Pages 407-413Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.surfcoat.2018.05.021
Keywords
Carbonized cotton cloth; Hydrogen evolution reaction; Oxygen evolution reaction; Cyclic voltammetry; Cyclic stability
Funding
- Polymer Chemistry Program
- Kansas Polymer Research Center, Pittsburg State University
- FIT-DRONE
- FIT-Biologists at the University of Memphis
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Water electrolysis is one of the greenest ways to generate clean energy. However, it is critical to develop durable and cost-effective electrocatalysts using earth-abundant materials for overall water splitting. Here we report, a facile method to fabricate N-doped cotton cloth as an electrocatalyst. The N-doped cotton cloth showed outstanding performance as an electrocatalyst for overall water splitting. For oxygen evolution reaction (OER), N-doped cotton cloth requires a low overpotential of 351 mV to deliver 10 mA/cm(2) of current density with a Tafel slope of 88 mV/dec. On the other hand, it requires 233 mV to achieve a current density of 10 mA/cm(2) for hydrogen evolution reaction (HER) with a Tafel slope of 135 mV/dec. Furthermore, the electrocatalyst showed outstanding electrocatalytic stability and flexibility. The observed overpotential and stability are among the best for the metal-free electrocatalyst. Such a binder-free approach for fabrication of high performance, durable and flexible bi-functional (HER and OER) electrocatalyst could be a promising way to generate green energy from water.
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