Development of 3D open-cell structured Co-Ni catalysts by pulsed electrodeposition for hydrolysis of sodium borohydride

Yu Jin Lee, Arash Badakhsh, Dongsu Min, Young Suk Jo, Hyuntae Sohn, Chang Won Yoon, Hyangsoo Jeong, Yongmin Kim, Kwang Bum Kim, Suk Woo Nam

Research output: Contribution to journalArticlepeer-review

10 Citations (Scopus)


Structured cobalt–nickel catalysts were synthesized by roughening the nickel-foam surface and electrodepositing cobalt onto it for application to sodium-borohydride hydrolysis. The catalysts were prepared by incorporating aluminum onto the nickel-foam surface, increasing the nickel-foam surface area by subsequently leaching the aluminum, and electrodepositing cobalt. The cobalt was chronoamperometrically electrodeposited under the optimal condition (−2.0 VAg/AgCl) to prevent local cobalt deposition on the substrate edge. Additionally, the cobalt was uniformly deposited onto the porous nickel foam by pulsed chronoamperometric electrodeposition wherein voltages were alternated from −2.0 to −0.3 VAg/AgCl, to electroplate and dissolve the cobalt, respectively. Although the resulting structured cobalt–nickel catalysts exhibited 1.5 times higher catalytic activity than the porous nickel foam, the cobalt content was only 0.57 wt% of the whole sample. In addition, the structured cobalt–nickel catalyst showed higher stability than the porous nickel foam even after ultrasonication as an accelerated durability test. Therefore, pulsed electroplating is an effective method of increasing both catalyst activity and durability.

Original languageEnglish
Article number149530
JournalApplied Surface Science
Publication statusPublished - 2021 Jul 15

Bibliographical note

Funding Information:
This work was supported by the Hydrogen Energy Innovation Technology Development Program of the National Research Foundation of Korea (NRF) funded by the Government of Korea (Ministry of Science and ICT) (No. 2019M3E6A1064611) and the Korea Institute of Science and Technology (KIST) Institutional Program (No. 2E30993).

Publisher Copyright:
© 2021 Elsevier B.V.

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Condensed Matter Physics
  • Physics and Astronomy(all)
  • Surfaces and Interfaces
  • Surfaces, Coatings and Films


Dive into the research topics of 'Development of 3D open-cell structured Co-Ni catalysts by pulsed electrodeposition for hydrolysis of sodium borohydride'. Together they form a unique fingerprint.

Cite this