Academic Journal

The Electrocatalytic Oxygen Evolution Reaction Activity of Rationally Designed NiFe-Based Glycerates

التفاصيل البيبلوغرافية
العنوان: The Electrocatalytic Oxygen Evolution Reaction Activity of Rationally Designed NiFe-Based Glycerates
المؤلفون: Vivek Kumar Singh, Bibhudatta Malik, Rajashree Konar, Efrat Shawat Avraham, Gilbert Daniel Nessim
المصدر: Electrochem, Vol 5, Iss 1, Pp 70-83 (2024)
بيانات النشر: MDPI AG, 2024.
سنة النشر: 2024
مصطلحات موضوعية: oxygen evolution reaction (OER), nickel–iron glycerate (NiFeG), layered double hydroxide (LDH), overpotential, cyclic voltammograms (CVs), Industrial electrochemistry, TP250-261
الوصف: The electrocatalytic oxygen evolution reaction (OER) is an arduous step in water splitting due to its slow reaction rate and large overpotential. Herein, we synthesized glycerate-anion-intercalated nickel–iron glycerates (NiFeGs) using a one-step solvothermal reaction. We designed various NiFeGs by tuning the molar ratio between Ni and Fe to obtain Ni4Fe1G, Ni3Fe1G, Ni3Fe2G, and Ni1Fe1G, which we tested for their OER performance. We initially analyzed the catalytic performance of powder samples immobilized on glassy carbon electrodes using a binder. Ni3Fe2G outperformed the other NiFeG compositions, including NiFe layered double hydroxide (LDH). It exhibited an overpotential of 320 mV at a current density of 10 mA cm–2 in an electrolytic solution of pH 14. We then synthesized carbon paper (CP)-modified Ni3Fe2G as a self-supported electrode (Ni3Fe2G/CP), and it exhibited a high current density (100 mA cm−2) at a low overpotential of 300 mV. The redox peak analysis for the NiFeGs revealed that the initial step of the OER is the formation of γ-NiOOH, which was further confirmed by a post-Raman analysis. We extensively analyzed the catalyst’s stability and lifetime, the nature of the active sites, and the role of the Fe content to enhance the OER performance. This work may provide the motivation to study metal-alkoxide-based efficient OER electrocatalysts that can be used for alkaline water electrolyzer applications.
نوع الوثيقة: article
وصف الملف: electronic resource
اللغة: English
تدمد: 2673-3293
Relation: https://www.mdpi.com/2673-3293/5/1/5; https://doaj.org/toc/2673-3293
DOI: 10.3390/electrochem5010005
URL الوصول: https://doaj.org/article/64737e8568cc49c3839b3b9db3616164
رقم الانضمام: edsdoj.64737e8568cc49c3839b3b9db3616164
قاعدة البيانات: Directory of Open Access Journals
الوصف
تدمد:26733293
DOI:10.3390/electrochem5010005