Year-end Sale % OFF 
Abstract
In this study, simple electrospinning combined with pyrolysis were used to fabricate transition-metal-based-nanoparticle-incorporated carbon nanofiber (CNF) electrocatalysts for a high-efficiency hydrogen evolution reaction (HER) and overall water splitting. Co-CeO2 nanoparticle-incorporated carbon nanofibers (Co-CeO2@CNF) exhibit an outstanding electrocatalytic HER performance with an overpotential and Tafel slope of 92 mV and 54 mV/dec, respectively. For the counterpart, electrolysis, we incorporate the widely used Ni2Fe catalyst with a high oxygen evolution reaction (OER) activity into the carbon nanofiber (Ni2Fe@CNF). To evaluate their electrochemical properties for the overall water splitting, Co-CeO2@CNF and Ni2Fe@CNF were used as the HER and OER electrocatalysts in an alkaline electrolyzer. With the paired Co-CeO2@CNF and Ni2Fe@CNF electrodes, an overall water splitting current density of 10 mA/cm2 was achieved by applying 1.587 V across the electrodes with a remarkably lower overpotential of 257 mV compared to that of an electrolyzer comprised of Pt/C and IrO2 electrodes (400 mV). Owing to the conformal incorporation of nanoparticles into the CNF, the electrocatalysts exhibit significant long-term durability over 70 h of overall water splitting. This study provides rational designs of catalysts with high electrochemical catalytic activity and durability to achieve overall water splitting.
Highlights
The fabrication of high-efficiency catalysts with long-term durability through a cost-effective process is essential for the sustainable production of hydrogen (H2 ) [1,2]
To evaluate their electrochemical properties for the overall water splitting, Co-CeO2 @carbon nanofiber (CNF) and Ni2 Fe@CNF were used as the hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) electrocatalysts in an alkaline electrolyzer, respectively
The obtained polymer mat was transformed into a black Co-CeO2 @CNF catalyst upon thermal treatment at 900 ◦ C for 5 h in a tubular furnace under a N2 atmosphere
Summary
The fabrication of high-efficiency catalysts with long-term durability through a cost-effective process is essential for the sustainable production of hydrogen (H2 ) [1,2]. The rational design of electrocatalysts, considering the process cost, catalytic activity, and long-term durability, is required to achieve high-efficiency overall water splitting for the production of clean H2. Water electrolysis, the widely used Ni2 Fe catalyst for OER was incorporated into the CNF To evaluate their electrochemical properties for the overall water splitting, Co-CeO2 @CNF and Ni2 Fe@CNF were used as the HER and OER electrocatalysts in an alkaline electrolyzer, respectively. Their performances were compared with those of an electrolyzer fabricated by pairing Pt/C and IrO2 electrodes. Owing to the conformal incorporation of nanoparticles into the CNF supports, the electrocatalysts exhibited significant long-term durability over 70 h of operation
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
