Superaerophobic 0D nickel–2D ceria supported 316L for enhanced OER and HER activity
Year: 2025
Type: article
Abstract: Hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) are critical in water splitting electrolysis. Hence, discovery and development of bi-functional electrocatalysts with high efficiency and low-cost of deployment is essential for sustainable energy conversion. These gas involving reactions such as OER, HER, and CO 2 reduction with diversified bubble behaviors are essential in energy conversion processes. Therefore, electrode design strategies to achieve superwetting (liquid-solid) could accelerate gas bubble evolution at the electrode-electrolyte interface. In this work, electrodeposition methodology was adopted to fabricate Ni/CeO 2 superaerophobic electrodes for bifunctional electrocatalysis . The self-supported nanocomposite electrodes demonstrate superaerophobic wetting and a significant increase in electrocatalytic activity . The Ni/CeO 2 electrocatalyst demonstrate excellent OER and HER performance at an overpotential of 335 mV and 310 mV respectively. A lowest Tafel slope of 91.1 mV/dec and 84.6 mV/dec was achieved for OER and HER activity. Furthermore, a 3–5 fold increase in electrochemical surface area is evidenced for Ni/CeO 2 compared to nickel and CeO 2 catalytic electrodes. The interplay of superwetting, high electrochemical active surface area and oxygen vacancies are determined for enhanced water splitting with good endurance over 24 h measured at 20 mA/cm 2 . This study could provide additional insights for design and development of low-cost, self-supported high efficient electrocatalyst for water splitting.
Source: Surface and Coatings Technology
Authors: Jothi Prakash Chakrapani Gunarasan, Jeong-Won Lee
Institution: Chosun University
Language: English
Field: Energy
Domain: Physical Sciences
Open Access status: hybrid
Estimated APC paid: $3,880
Awards: G2953374101, G5997824611
OpenAlex ID: W4409260533