Issue 11, 2024

Electric field-induced phosphorization to prepare CoP@Biochar composites for efficient bifunctional oxygen electrocatalysis

Abstract

The large-scale use of zinc–air batteries (ZABs) has been limited by their sluggish OER and ORR kinetics. The current synthesis of catalysts for air electrodes requires harsh conditions. The design and manufacture of bifunctional catalysts under mild conditions are of great significance. Herein, an electric field-induced phosphorization at room temperature is proposed to prepare bifunctional electrocatalysts designed by coupling N-doped carbon and CoP nanoparticles based on a multi-active site-integration strategy. The simple, safe, non-toxic and highly controllable electric field-induced reaction creates CoP active sites. The catalyst exhibits a remarkably narrow potential gap (ΔE) of 0.65 V between the half-wave potential of the ORR and the potential of the OER. The low ΔE signifies a superior catalytic bifunctionality of CoP@NWC. Aqueous ZABs with an optimized catalyst achieve a high discharge specific capacity of 805.8 mA h gZn−1 and long-term cycling stability over 1200 cycles. Quasi-solid-state ZABs show a discharge-specific capacity of 760.5 mA h gZn−1. The outstanding bifunctional catalytic activities originate from the synergistic effect of dual active sites between CoP and NWC induced by the electric field. This work provides a new perspective for building advanced catalysts from biomass under ambient conditions.

Graphical abstract: Electric field-induced phosphorization to prepare CoP@Biochar composites for efficient bifunctional oxygen electrocatalysis

Supplementary files

Article information

Article type
Paper
Submitted
30 Jan 2024
Accepted
18 Apr 2024
First published
19 Apr 2024

Green Chem., 2024,26, 6520-6531

Electric field-induced phosphorization to prepare CoP@Biochar composites for efficient bifunctional oxygen electrocatalysis

X. Wu, T. Zhou, T. Teng, S. Liu, B. Lu, S. Mehdi, Y. Liu, J. Jiang, Y. Wang and B. Li, Green Chem., 2024, 26, 6520 DOI: 10.1039/D4GC00551A

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