Highly efficient water-splitting electrodes with stable operation at 3 A cm−2 in alkaline media through molecular linker assembly-induced all-in-one structured NiMo and NiFe electrocatalysts

Youhyun Son, Jeongmin Mo, Euiju Yong, Jeongyeon Ahn, Gyuchan Kim, Wonyoung Lee, Cheong Hoon Kwon, Hyun Ju, Seung Woo Lee, Byung Hyun Kim, Myeongjin Kim, Jinhan Cho

Research output: Contribution to journalArticlepeer-review

Abstract

Developing nonnoble electrocatalyst-based water-splitting electrodes with high operational stability and low overpotentials is one of the most critical challenges in commercially available water-splitting reactions. In this study, we present water-splitting textile electrodes enabling remarkably low overpotentials and high stable operation. We first assembled conductive multi-walled-carbon-nanotubes (MWCNTs) with amine molecule-based linkers onto cotton textiles and subsequently electrodeposited Ni onto the MWCNT-incorporated textile. For the preparation of hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) electrodes, NiMo and NiFe were further electrodeposited onto the Ni-electrodeposited textile electrode, respectively. These electrodes exhibited considerably low overpotentials in alkaline media (8 mV at 10 mA cm−2 for HER and 189 mV at 50 mA cm−2 for OER). Furthermore, the full-cell electrodes preserved a low cell voltage of 2.01 V at an unprecedentedly high current density of 3000 mA cm−2 for a prolonged duration (> at least 1000 h).

Original languageEnglish
Article number123563
JournalApplied Catalysis B: Environmental
Volume343
DOIs
Publication statusPublished - 2024 Apr

Bibliographical note

Publisher Copyright:
© 2023 The Authors

Keywords

  • Binary nonnoble metal
  • Carbon nanotube
  • Water-splitting

ASJC Scopus subject areas

  • Catalysis
  • General Environmental Science
  • Process Chemistry and Technology

Fingerprint

Dive into the research topics of 'Highly efficient water-splitting electrodes with stable operation at 3 A cm−2 in alkaline media through molecular linker assembly-induced all-in-one structured NiMo and NiFe electrocatalysts'. Together they form a unique fingerprint.

Cite this