123rd General Meeting of the KCS

Type Oral Presentation
Area Oral Presentation of Young Material Chemists
Room No. Room 405+406
Time THU 10:24-10:36
Code MAT.O-8
Subject Conducting Polymer Decorated Hierarchical Earth-Abundant Material as Efficient Bifunctional Electrocatalyst for Overall Water Splitting
Authors Samiran Garain, Min Hyung Lee1,*
Chemistry, Kyung Hee University, India
1Department of Applied Chemistry, Kyung Hee University, Korea
Abstract Nowadays, excessive use of exhaustible fossil fuels is deemed to worsen environmental pollution and greenhouse effects. Thus, development of electrochemical hydrogen and oxygen production from water splitting is one of the most promising approaches for many modern energy storage and conversion technologies, such as fuel cells and water electrolysis, to meet the increasing global energy demands and the critical requirement of a cleaner environment. To realize the industrial applications of these energy systems, materials that drive electrocatalytic reactions with a low overpotential and a high mass activity, as well as a high durability to reduce the cost are highly desirable. In this study, the conducting polymer decorated NiCo2S4 as low-cost electrocatalyst shows excellent catalytic performance toward HER and OER in alkaline solution, such as super high catalytic activity, small Tafel slopes (42.2 mV dec-1 for OER and 68.5 mV dec-1 for HER), and superior stability, which are comparable to those of the previously reported earth-abundant material-based electrocatalysts. The catalyst exhibits very low overpotential (273 mV for OER and 77 mV for HER) to achieve a current density of 10 mA cm−2 for HER and OER, with a promising stability over 24 hours. This work opens a new avenue for the rational design of hybrid structure catalyst towards overall water splitting for energy conversion and storage applications. This research was supported by Creative Materials Discovery Program through the National Research Foundation of Korea (NRF) funded by Ministry of Science and ICT (NRF-2017M3D1A1039379).
E-mail samirangarain@gmail.com