Cited by 39Electrocatalysts for Energy ConversionCO2 Reduction Techniques and CatalystsFuel Cells and Related Materials

In Situ Design of a Nanostructured Interface between NiMo and CuO Derived from Metal–Organic Framework for Enhanced Hydrogen Evolution in Alkaline Solutions

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Sadeghi, Ebrahim, Chamani, Sanaz, Yildirim, Ipek Deniz, Erdem, Emre, Peighambardoust, Naeimeh Sadat, Aydemir, Umut·2024·ACS Applied Materials & Interfaces

Abstract

High Resolution Image Download MS PowerPoint Slide Hydrogen shows great promise as a carbon-neutral energy carrier that can significantly mitigate global energy challenges, offering a sustainable solution. Exploring catalysts that are highly efficient, cost-effective, and stable for the hydrogen evolution reaction (HER) holds crucial importance. For this, metal–organic framework (MOF) materials have demonstrated extensive applicability as either a heterogeneous catalyst or catalyst precursor. Herein, a nanostructured interface between NiMo/CuO@C derived from Cu-MOF was designed and developed on nickel foam (NF) as a competent HER electrocatalyst in alkaline media. The catalyst exhibited a low overpotential of 85 mV at 10 mA cm –2 that rivals that of Pt/C (83 mV @ 10 mA cm –2 ). Moreover, the catalyst’s durability was measured through chronopotentiometry at a constant current density of −30, −100, and −200 mA cm –2 for 50 h each in 1.0 M KOH. Such enhanced electrocatalytic performance could be ascribed to the presence of highly conductive C and Cu species, the facilitated electron transfer between the components because of the nanostructured interface, and abundant active sites as a result of multiple oxidation states. The existence of an ionized oxygen vacancy (O v ) signal was confirmed in all heat-treated samples through electron paramagnetic resonance (EPR) analysis. This revelation sheds light on the entrapment of electrons in various environments, primarily associated with the underlying defect structures, particularly vacancies. These trapped electrons play a crucial role in augmenting electron conductivity, thereby contributing to an elevated HER performance.

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Authors
Sadeghi, E., Chamani, S., Yildirim, I. D., Erdem, E., Peighambardoust, N. S., & Aydemir, U.
Affiliations
  • Koç University (TR)
  • Faculty of Engineering and Natural Sciences, Materials Science and Nano Engineering, Sabanci University, Istanbul 34956, Turkey
  • Sabancı Üniversitesi (TR)
Corresponding author
Aydemir, Umut
Venue
ACS Applied Materials & Interfaces
Published
2024-02-20
Volume
16
Issue
8
Pages
10078-10092
ISSN
  • 1944-8244 (ISSN-L)
  • 1944-8252
OpenAlex
W4391963604
Cited by
39
References
74
Citations by year
2026: 21 · 2025: 13 · 2024: 5
FWCI
2.59
Type
journal article
Language
en
Open access
Locations
  • ACS Applied Materials & Interfaces (publishedVersion, cc-by)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • Sabanci University (submittedVersion)
Funders
T?rkiye Bilimler Akademisi
Topics
  • Physical Sciences › Energy › Renewable Energy, Sustainability and the Environment › Electrocatalysts for Energy Conversion
  • Physical Sciences › Energy › Renewable Energy, Sustainability and the Environment › CO2 Reduction Techniques and Catalysts
  • Physical Sciences › Engineering › Electrical and Electronic Engineering › Fuel Cells and Related Materials
Keywords
hydrogen evolution reaction, electrocatalysts, metal-organic framework derived catalysts, copper metal-organic framework, nanostructured interfaces, nickel foam, alkaline solution, oxygen vacancies, electron transfer, catalyst stability

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