120th General Meeting of the KCS

Type Symposium
Area Recent Advances in Electrochemistry
Room No. Room 201+202
Time FRI 09:40-:
Code ELEC2-2
Subject Noble Metal-Based Bimodal Nanocatalysts for Hydrogen Evolution Reaction in an Alkaline Electrolyte
Authors Sang-Il Choi
Department of Chemistry, Kyungpook National University, Korea
Abstract Hydrogen evolution reaction (HER) in an alkaline media consumes massive electrical energy during water electrolysis owing to the sluggish kinetics. Therefore, development of an active electrocatalyst is remained as the great challenge. Because the Pt catalyst showing the best activity among the HER catalysts, is expensive, development of the cost-effective electrocatalyst has been intensively studied by many researchers. Recent reports designed the bimodal surface modified catalysts, such as noble metal-transition metal hydroxides composites, as the promising candidate for enhancing the alkaline HER kinetics. In this bimodal system, the oxophilic metal hydroxides catalyze the dissociation of water and the formation of hydrogen intermediates, while the nearby noble metal surface converts the hydrogen intermediate to H2 gas. In this talk, we introduce the effective electrocatalysts based on Ru nanocrystals, where Ni(OH)2 was formed on their surfaces during a synthesis. The as-prepared bimodal electrocatalysts show comparable HER activity with that of a commercial Pt/C catalyst.
E-mail sichoi@knu.ac.kr