Preprint Article Version 1 Preserved in Portico This version is not peer-reviewed

Room-Temperature Synthesis of Carbon Nanotubes-Interconnected Amorphous NiFe Layered Double Hydroxides for Boosting Oxygen Evolution Reaction

Version 1 : Received: 8 October 2023 / Approved: 8 October 2023 / Online: 8 October 2023 (08:30:04 CEST)

A peer-reviewed article of this Preprint also exists.

Chen, Z.; Qu, Q.; Li, X.; Srinivas, K.; Chen, Y.; Zhu, M. Room-Temperature Synthesis of Carbon-Nanotube-Interconnected Amorphous NiFe-Layered Double Hydroxides for Boosting Oxygen Evolution Reaction. Molecules 2023, 28, 7289. Chen, Z.; Qu, Q.; Li, X.; Srinivas, K.; Chen, Y.; Zhu, M. Room-Temperature Synthesis of Carbon-Nanotube-Interconnected Amorphous NiFe-Layered Double Hydroxides for Boosting Oxygen Evolution Reaction. Molecules 2023, 28, 7289.

Abstract

Oxygen evolution reaction (OER) is a key half-reaction in electrocatalytic water splitting. Large-scale water electrolysis is hampered by the commercial precious metal-based OER electrocatalysts owing to their high cost and slow kinetics. To address these issues, we present a facile one-pot room-temperature coprecipitation method to quickly synthesize carbon nanotubes-interconnected amorphous NiFe-layered double hydroxides (NiFe-LDH@CNT) as low-cost, efficient and stable OER electrocatalyst. NiFe-LDH@CNT hybrid catalyst delivers outstanding OER performance with a low onset overpotential of 255 mV and a small Tafel slope of 51.2 mV dec-1, as well as outstanding long-term stability. The terrific catalytic capability of NiFe-LDH@CNT can be associated with the synergistic effects of its room-temperature synthesized amorphous structure, bi-metallic modulation, and conductive CNT skeleton. The room-temperature synthesis can not only offer economic feasibility, but also obtain amorphous NiFe-LDH without crystalline boundaries, facilitating long-term stability during OER process. The bi-metallic nature of NiFe-LDH guarantees a modified electronic structure, providing additional catalytic sites. Simultaneously, the highly conductive CNT network fosters a nanoporous structure, facilitating electron transfer, O2 release and enriching catalytic sites. This study presents a strategy to purposefully design nanoarchitecture and facilely synthesize amorphous transition metal-based OER catalysts, ensuring the cost effectiveness, production efficiency, and long-term stability.

Keywords

Room-temperature synthesis; layered double hydroxides; carbon nanotubes; NiFe-LDH@CNT; oxygen evolution reaction.

Subject

Chemistry and Materials Science, Electrochemistry

Comments (0)

We encourage comments and feedback from a broad range of readers. See criteria for comments and our Diversity statement.

Leave a public comment
Send a private comment to the author(s)
* All users must log in before leaving a comment
Views 0
Downloads 0
Comments 0


×
Alerts
Notify me about updates to this article or when a peer-reviewed version is published.
We use cookies on our website to ensure you get the best experience.
Read more about our cookies here.