Open AccessEnhanced Electrocatalytic Activity of Stainless Steel Substrate by Nickel Sulfides for Efficient Hydrogen Evolution
Author(s) -
Jong-Chan Youn,
Sangmin Jeong,
InHwan Oh,
Sunyoung Park,
Hien Duy,
KiJoon Jeon
Publication year - 2020
Publication title -
catalysts
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.8
H-Index - 53
ISSN - 2073-4344
DOI - 10.3390/catal10111274
Subject(s) - materials science , electrochemistry , nickel , catalysis , cyclic voltammetry , substrate (aquarium) , chemical engineering , carbon steel , hydrogen , metallurgy , inorganic chemistry , electrode , chemistry , corrosion , organic chemistry , oceanography , engineering , geology
Water splitting is one of the efficient ways to produce hydrogen with zero carbon dioxide emission. Thus far, Pt has been regarded as a highly reactive catalyst for the hydrogen evolution reaction (HER); however, the high cost and rarity of Pt significantly hinder its commercial use. Herein, we successfully developed an HER catalyst composed of NiSx (x = 1 or 2) on stainless steel (NiSx/SUS) using electrodeposition and sulfurization techniques. Notably, the electrochemical active surface area(ECSA) of NiSx/SUS was improved more than two orders of magnitude, resulting in a considerable improvement in the electrochemical charge transfer and HER activity in comparison with stainless steel (SUS). The long-term HER examination by linear scan voltammetry (LSV) confirmed that NiSx/SUS was stable up to 2000 cycles.