1422
Highly Efficient Water Splitting with Nickel Telluride: A Novel Bifunctional Electrocatalyst in Alkaline Medium

Thursday, 1 June 2017: 09:00
Grand Salon A - Section 3 (Hilton New Orleans Riverside)
U. De Silva (Missouri University Science & Technology), W. P. R. Liyanage, J. Masud, and M. Nath (Missouri University of Science & Technology)
The development of a highly active catalyst for water splitting to produce oxygen and hydrogen fuels is in rising demand to fulfill the increasing human need for clean and renewable energy. However, the most crucial step for efficient electrocatalytic water splitting is the oxygen evolution reaction (OER) that takes place at the anode. Traditionally, metal oxides have been introduced for this purpose however, recent developments have shown that transition metal selenides also shows better catalytic activity towards OER surpassing most of the conventional oxide electricatalysts. Herein we present how the family of chalcogenide electrocatalysts can be extended to transition metal tellurides and we will present the OER electrocatalytic activity of the first ever telluride, Ni3Te2 synthesized by hydrothermal reactions as well as electrodeposition technique. This catalyst show an overpotential of 170 mV at 10 mA/cm2 during the OER electrocatalytic activity in 1 M KOH, which is one of the lowest reported value till date and that highlight the high performance of this catalyst. Additionally, this catalyst also shows a high catalytic activity towards hydrogen evolution reaction (HER) and it only requires 250 mV over potential to achieve a current density of 10 mA/cm2 during HER conditions and that makes it a bifunctional elecrocatalyst. We will present the synthesis, characterization and electrochemical investigations of this new catalyst and additionally, we will also discuss the stability of this catalyst during long term OER conditions.