File Download

There are no files associated with this item.

  • Find it @ UNIST can give you direct access to the published full text of this article. (UNISTARs only)
Related Researcher

장지현

Jang, Ji-Hyun
Structures & Sustainable Energy Lab.
Read More

Views & Downloads

Detailed Information

Cited time in webofscience Cited time in scopus
Metadata Downloads

Bi-functional 3D-NiCu-Double Hydroxide@Partially Etched 3D-NiCu Catalysts for Non-Enzymatic Glucose Detection and the Hydrogen Evolution Reaction

Author(s)
Kang, Kyeong-NamKim, Sun-, IYoon, Jong-ChulKim, JinhoCahoon, CollinJang, Ji-Hyun
Issued Date
2022-07
DOI
10.1021/acsami.2c04471
URI
https://scholarworks.unist.ac.kr/handle/201301/59227
Citation
ACS APPLIED MATERIALS & INTERFACES, v.14, no.29, pp.33013 - 33023
Abstract
Hydrogen production, which is in the spotlight as a promising eco-friendly fuel, and the need for inexpensive and accurate electronic devices in the biochemistry field are important emerging technologies. However, the use of electrocatalytic devices based on expensive noble metal catalysts limits commercial applications. In recent years, to improve performance and reduce cost, electrocatalysts based on cheaper copper or nickel materials have been investigated for the non-enzymatic glucose oxidation reaction (GOR) and hydrogen evolution reaction (HER). In this study, we demonstrate a facile and easy electrochemical method of forming a cheap nickel copper double hydroxide (NiCu-DH) electrocatalyst deposited onto a three-dimensional (3D) CuNi current collector, which can effectively handle two different reactions due to its high activity for both the GOR and the HER. The as-prepared electrode has a structure comprising abundant 3D-interconnected porous dendritic walls for easy access of the electrolyte ions and highly conductive networks for fast electron transfer; additionally, it provides numerous electroactive sites. The synergistic combination of the dendritic 3D-CuNi with its abundant active sites and the self-made NiCu-DH with its excellent electrocatalytic activity toward the oxidation of glucose and HER enables use of the catalyst for both reactions. The as-prepared electrode as a glucose sensor exhibits an outstanding glucose detection limit value (0.4 mu M) and a wide detection range (from 0.4 mu M to 1.4 mM) with an excellent sensitivity of 1452.5 mu A/cm2/mM. The electrode is independent of the oxygen content and free from chloride poisoning. Furthermore, the as-prepared electrode also requires a low overpotential of -180 mV versus reversible hydrogen electrode to yield a current density of 10 mA/cm2 with a Tafel slope of 73 mV/dec for the HER. Based on this performance, this work introduces a new paradigm for exploring cost-effective bi-functional catalysts for the GOR and HER.
Publisher
AMER CHEMICAL SOC
ISSN
1944-8244
Keyword (Author)
non-enzymatic sensorhydrogen evolution reactionbi-functional electrocatalystglucose oxidation reactionNiCu-DH@partially etched 3D-CuNi electrodehigh sensitivityhydrogen bubble template method
Keyword
OXYGEN EVOLUTIONHIERARCHICAL NANOSTRUCTURESENERGY-STORAGEIN-SITUNISENSORELECTROCATALYSTNANOFIBERSNANOWIRESSHELL

qrcode

Items in Repository are protected by copyright, with all rights reserved, unless otherwise indicated.