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Electrochemical splitting of water on IrO2 based Nafion bonded composite anode for efficient production of low cost and clean hydrogen fuel

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Title Electrochemical splitting of water on IrO2 based Nafion bonded composite anode for efficient production of low cost and clean hydrogen fuel
 
Creator Sonkar, Saraswati
Pramanik, Hiralal
 
Subject Clean Hydrogen
Composite anode
Electrochemical water splitting
Environmental pollution
 
Description 369-382
Hydrogen gas of ultrapure form has been produced via electrochemical splitting of water molecules using an efficient
water electrolysis method. The IrO2 based low-cost composite anode has been developed in the laboratory to split water
molecules via electrolysis with the cathode electrocatalyst as Pt (40 % by wt.)/CHSA. The electrocatalysts loading at anode
and cathode are 1 mg/cm2 at both electrodes. Other components of the manufactured electrodes are Nafion® (5 wt%)
ionomer dispersion, PTFE, and isopropyl alcohol. The electrolyzer is fabricated using a perspex sheet i.e., polymethyl
methacrylate. The rate of hydrogen production is measured for different applied currents, voltage, and concentrations of
H2SO4 electrolyte in the electrolysis mode at a temperature of 20 ℃. The IrO2 composites anode used as oxygen evolution
reaction are studied by electrochemical impedance studies (EIS) and cyclic voltammetry to evaluate the electrocatalytic
activity and charge transfer resistance of the developed composite anode. The IrO2 anode electrode exhibits a higher HER
activity concentration of 0.75 M H2SO4 electrolyte than that of the 0.25 M and 0.50 M H2SO4 electrolyte concentration as is
shown by EIS. The highest hydrogen production rate of 0.9 mL/min is obtained at the voltage of 1.9 V and applied current
of 0.1 A using the electrolyte concentration of 0.75 M H2SO4. However, the hydrogen production rate is very low
(0.33 mL/min.) when a low voltage of 1.6 V and current of 0.04 A was applied at the same concentration of electrolyte
(0.75 M) H2SO4. IrO2 is known to be one of the most active electrocatalysts for the oxygen evolution reaction in a liquid
electrolyte, exhibiting high electronic conductivity and stability in the electrochemical system.
 
Date 2024-05-07T11:08:06Z
2024-05-07T11:08:06Z
2024-05
 
Type Article
 
Identifier 0975-0991 (Online); 0971-457X (Print)
http://nopr.niscpr.res.in/handle/123456789/63876
https://doi.org/10.56042/ijct.v31i3.6809
 
Language en
 
Publisher NIScPR-CSIR, India
 
Source IJCT Vol.31(3) [May 2024]