Yasser A. Shaban , Shahed U.M. Khan , Mohamed Abdel Salam , Radwan Khalid Al-Farawati , Mohammed Ali Ghandourah , Doaa Fowzi Baamer , Mousa Zobidi
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引用次数: 0
Abstract
Background
Electrochemical water splitting, employing both the anodic oxygen evolution reaction (OER) and the cathodic hydrogen evolution reaction (HER), emerges as highly promising method for hydrogen production.
Methods
Herein the spray pyrolysis technique was utilized for the synthesis of novel electrodes of ternary mixed oxide of Fe, Co, and Ni and carbon doped titanium oxide (C-TiO2) on a three-dimensional (3D) open-pore structure of Cu (CF) and Ni-Fe (NFF) foams, respectively. The electrocatalytic performances of these electrodes were then evaluated in three different electrolyte solutions: 1.0 M KOH, natural seawater, and buffered natural seawater.
Significant findings
The addition of buffer media (borate buffer) successfully overcame the challenges associated with seawater splitting. The required potential to reach a current density of 80 mA cm−2 decreased drastically from 1.16 V vs RHE in seawater to just 968 mV in buffered seawater. Remarkably at a constant potential of 1.3 V vs RHE, the current density increased significantly from 93.3 mA cm−2 for seawater to 200.8 mA cm−2 for buffered seawater. Low Tafel slopes of 76 mV dec−1 and 90 mV dec−1 were observed for Fe-Co-Ni@CF and C-TiO2@NFF electrodes, respectively.
期刊介绍:
Journal of the Taiwan Institute of Chemical Engineers (formerly known as Journal of the Chinese Institute of Chemical Engineers) publishes original works, from fundamental principles to practical applications, in the broad field of chemical engineering with special focus on three aspects: Chemical and Biomolecular Science and Technology, Energy and Environmental Science and Technology, and Materials Science and Technology. Authors should choose for their manuscript an appropriate aspect section and a few related classifications when submitting to the journal online.