• Musthafa, Farzana N.
• Kumar, Bijandra
• Sha, Mizaj Shabil
• Abdullah, Aboubakr M.
• Sadasivuni, Kishor Kumar
• Alahmad, Johaina Khalid
• Alejli, Assem

Abstract

<jats:title>Abstract</jats:title><jats:p>Electrochemical water splitting is a promising pathway for effective hydrogen (H<jats:sub>2</jats:sub>) evolution in energy conversion and storage, with electrocatalysis playing a key role. Developing efficient, cost-effective and stable catalysts or electrocatalysts is critical for hydrogen evolution from water splitting. Herein, we evaluated a graphene-modified nanoparticle catalyst for hydrogen evolution reaction (HER). The electrocatalytic H<jats:sub>2</jats:sub> production rate of reduced graphene oxide-titanium oxide-nickel oxide-zinc oxide (rGO–TiO<jats:sub>2</jats:sub>–NiO–ZnO) is high and exceeds that obtained on components alone. This improvement is due to the presence of rGO as an electron collector and transporter. Moreover, a current density of 10 mA/cm<jats:sup>2</jats:sup> was recorded at a reduced working potential of 365 mV for the nanocomposite. The electronic coupling effect between the nanoparticle components at the interface causes the nanoparticle's hydrogen evolution reaction catalytic activity.</jats:p><jats:p><jats:bold>Graphical Abstract</jats:bold></jats:p>

Topics

• nanoparticle
• nanocomposite
• density
• impedance spectroscopy
• nickel
• zinc
• Hydrogen
• titanium
• current density