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An efficient and stable iodine-doped nickel hydroxide electrocatalyst for water oxidation: synthesis, electrochemical performance, and stability.
Yousaf, Sheraz; Zulfiqar, Sonia; Somaily, H H; Warsi, Muhammad Farooq; Rasheed, Aamir; Shahid, Muhammad; Ahmad, Iqbal.
Afiliación
  • Yousaf S; Institute of Chemistry, The Islamia University of Bahawalpur Baghdad-ul-Jadeed Campus Bahawalpur-63100 Pakistan Farooq.warsi@iub.edu.pk.
  • Zulfiqar S; Department of Chemistry, School of Sciences & Engineering, The American University in Cairo New Cairo 11835 Egypt.
  • Somaily HH; Research Center for Advanced Materials Science (RCAMS), King Khalid University P.O. Box 9004 Abha 61413 Saudi Arabia.
  • Warsi MF; Department of Physics, Faculty of Science, King Khalid University P.O. Box 9004 Abha Saudi Arabia.
  • Rasheed A; Institute of Chemistry, The Islamia University of Bahawalpur Baghdad-ul-Jadeed Campus Bahawalpur-63100 Pakistan Farooq.warsi@iub.edu.pk.
  • Shahid M; Institute of Chemistry, The Islamia University of Bahawalpur Baghdad-ul-Jadeed Campus Bahawalpur-63100 Pakistan Farooq.warsi@iub.edu.pk.
  • Ahmad I; Department of Chemistry, College of Science, University of Hafr Al Batin P.O. Box 1803 Hafr Al Batin 31991 Saudi Arabia.
RSC Adv ; 12(36): 23454-23465, 2022 Aug 16.
Article en En | MEDLINE | ID: mdl-36090404
The design of oxygen evolution reaction (OER) catalysts with higher stability and activity by economical and convenient methods is considered particularly important for the energy conversion technology. Herein, a simple hydrothermal method was adopted for the synthesis of iodine-doped nickel hydroxide nanoparticles and their OER performance was explored. The electrocatalysts were structurally characterized by powder X-ray diffraction analysis (P-XRD), Fourier transform infrared spectroscopy (FTIR), field emission scanning electron microscopy (FESEM), energy dispersive X-ray spectroscopy (EDX), and BET analysis. The electrochemical performance of the electrocatalysts was assessed by cyclic voltammetry, linear sweep voltammetry, and electrochemical impedance spectroscopy. The abundant catalytic active sites, oxygen vacancies, low charge-transfer resistance, and a high pore diameter to pore size ratio of iodine-doped Ni(OH)2 were responsible for its excellent catalytic activity, whereby OER was initiated even at 1.52 V (vs. RHE) and a 330 mV overpotential was needed to reach a 40 mV cm-2 current density in 1 M KOH solution. The material also exhibited a low Tafel slope (46 mV dec-1), which suggests faster charge-transfer kinetics as compared to its counterparts tested under the same electrochemical environment. It is worth noting that this facile and effective approach suggests a new way for the fabrication of metal hydroxides rich in oxygen vacancies, thus with the potential to boost the electrochemical performance of energy-related systems.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: RSC Adv Año: 2022 Tipo del documento: Article Pais de publicación: Reino Unido
Texto completo
Añadir a Mi BVS
Imprimir
XML
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: RSC Adv Año: 2022 Tipo del documento: Article Pais de publicación: Reino Unido