Issue 42, 2023

P-doped binary Ni/Fe–N–C for enhanced oxygen electrocatalysis performance

Abstract

Adjusting the micro-environment of highly dispersive metals on carbon supports has been proved to be effective for achieving enhanced electrocatalysis performance. Herein, we delicately design a phosphorus-doped binary NiFe–nitrogen–carbon material (denoted as P-NiFe–NC), taking advantage of the coupling reaction between phenylphosphonamide (P dopant) and formamide (the carbon and nitrogen sources). The XPS N 1s fine scan reveals the strong interplay of N and P by the positively shifted binding energy of pyridinic N species after P incorporation, and the chemical state of Fe species is influenced accordingly. In addition, the P doping can enlarge the specific surface area and increase the meso/macroporosity of NiFe–NC, thus contributing to the enhancement of mass transfer inside the pores. The P-NiFe–NC sample exhibits favorable bifunctional oxygen electrocatalysis performance, rendering an ORR half-wave potential of 0.85 V and an OER potential of 1.69 V@10.0 mA cm−2, superior to those of P-free NiFe–NC. Assembled into Zn–air batteries, P-NiFe–NC delivers a high specific power of 161.36 mW cm−2 and stable charge/discharge for over 100 h (corresponding to 300 cycles).

Graphical abstract: P-doped binary Ni/Fe–N–C for enhanced oxygen electrocatalysis performance

Supplementary files

Article information

Article type
Paper
Submitted
28 Jun 2023
Accepted
08 Oct 2023
First published
10 Oct 2023

Phys. Chem. Chem. Phys., 2023,25, 28841-28847

P-doped binary Ni/Fe–N–C for enhanced oxygen electrocatalysis performance

H. Jia, X. Meng, Y. Lin, D. Wang, G. Li and G. Zhang, Phys. Chem. Chem. Phys., 2023, 25, 28841 DOI: 10.1039/D3CP03049K

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