Issue 15, 2024

Novel NiCoP nanoarray modified by NiFeCo layered double hydroxide quantum dots as highly efficient bifunctional electrocatalysts in anion exchange membrane water electrolysis

Abstract

Enhancing the activity of non-precious metal electrocatalysts is crucial for advancing anion exchange membrane (AEM) electrolyzer technology. In this study, we synthesized an NiFeCo layered double hydroxide quantum dots (LDHQDs)-modified NiCoP nanoarray (NiCoP NA) via a hydrothermal–phosphorization–electrostatic adsorption process (LDHQDs/NiCoP NA). The LDHQDs/NiCoP NA demonstrates overpotentials of 75 and 263 mV, respectively, to achieve current densities of 10 and 1000 mA cm−2 for the hydrogen evolution reaction. For the oxygen evolution reaction, reaching current densities of 10 and 1000 mA cm−2 requires 203 and 330 mV, respectively. For overall water splitting, the LDHQDs/NiCoP NA electrocatalyst demonstrated remarkable performance, achieving a high current density of 1000 mA cm−2 at 1.69 V. Furthermore, an AEM electrolyzer utilizing the LDHQDs/NiCoP NA as the anodic and cathodic electrocatalyst requires only 2 V to reach 574 mA cm−2 and 2.28 V to reach 1000 mA cm−2. The excellent electrocatalytic activity of the LDHQDs/NiCoP NA is due mainly to the large electrochemically active surface area of LDHQDs and the strong electronic coupling effect between the NiCoP NA and LDHQDs, which results in metallic conductivity and appropriate d-band centers. This study presents a practical methodology for developing highly efficient electrocatalysts through the utilization of LDHQDs.

Graphical abstract: Novel NiCoP nanoarray modified by NiFeCo layered double hydroxide quantum dots as highly efficient bifunctional electrocatalysts in anion exchange membrane water electrolysis

Supplementary files

Article information

Article type
Research Article
Submitted
26 Feb 2024
Accepted
15 Jun 2024
First published
26 Jun 2024

Inorg. Chem. Front., 2024,11, 4794-4801

Novel NiCoP nanoarray modified by NiFeCo layered double hydroxide quantum dots as highly efficient bifunctional electrocatalysts in anion exchange membrane water electrolysis

L. Li, S. Liu, T. Yang, L. Zhou, K. Wang, E. Wang, X. Yu, K. Chou, R. Guo, Z. Ma and X. Hou, Inorg. Chem. Front., 2024, 11, 4794 DOI: 10.1039/D4QI00512K

To request permission to reproduce material from this article, please go to the Copyright Clearance Center request page.

If you are an author contributing to an RSC publication, you do not need to request permission provided correct acknowledgement is given.

If you are the author of this article, you do not need to request permission to reproduce figures and diagrams provided correct acknowledgement is given. If you want to reproduce the whole article in a third-party publication (excluding your thesis/dissertation for which permission is not required) please go to the Copyright Clearance Center request page.

Read more about how to correctly acknowledge RSC content.

Social activity

Spotlight

Advertisements