| Title |
Development and Evaluation of Sacrificial Template-Based CoMo-LDH Electrode for Hydrogen Evolution Reaction |
| Authors |
이성준(Sung Jun Lee) ; 구태우(Taewoo Koo) ; 김인태(In Tae Kim) ; 박서현(Seo Hyun Park) ; 이우재(Woo-Jae Lee) ; 김양도(Yangdo Kim) ; 박유세(Yoo Sei Park) |
| DOI |
https://doi.org/10.3365/KJMM.2025.63.11.919 |
| ISSN |
1738-8228(ISSN), 2288-8241(eISSN) |
| Keywords |
Gas diffusion electrode; Electrocatalyst; Hydrogen evolution reaction; Water splitting; CoMo- LDH |
| Abstract |
Water splitting is a highly promising approach for producing high-purity hydrogen using renewable
energy sources, providing a sustainable and environmentally friendly pathway to carbon neutrality. Of the
two half-reactions involved in water electrolysis, the hydrogen evolution reaction (HER) plays a particularly
critical role, as it largely determines the overall energy efficiency and performance of the system. Although
platinum group metal (PGM)-based catalysts, such as platinum (Pt), have been widely recognized for their
exceptional HER activity and fast reaction kinetics, their high cost and limited availability pose significant
challenges for practical and large-scale applications. This economic and resource limitation has driven
extensive research into the development of efficient, durable, and cost-effective non-precious metal
alternatives that can replace PGMs while maintaining comparable performance. In this study, we designed
and fabricated a cobalt-molybdenum layered double hydroxide (CoMo-LDH) electrode specifically for HER,
employing a sequential electrodeposition process followed by a surface chemical reaction to achieve the desired
structure. The resulting CoMo-LDH exhibited a nanosheet morphology with a high specific surface area,
which significantly enhanced catalytic activity. In addition, the introduction of high-valence molybdenum
created oxygen vacancies within the lattice, which effectively modulated the adsorption and binding energies
of key reaction intermediates while preserving overall electrical neutrality. These structural and electronic
features collectively contributed to remarkable HER performance and long-term operational stability. |