Fe‐Alloyed MoNi Nanohybrids as Oxygen Evolution Reaction/Oxygen Reduction Reaction Bifunctional Electrocatalyst for Rechargeable Zinc–Air Batteries. Issue 2 (22nd December 2022)

• Record Type: Journal Article
• Authors: Dang, Linlin; Zhang, Kai; Wang, Qiguan; Xu, Changhua; Wang, Sumin
• Is Part Of: Physica status solidi. Volume 220:Issue 2(2023)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2022-12-22
• Subjects: bifunctional electrocatalyst -- FeMoNi alloying -- metal–air batteries -- OER/ORR; Solid state physics -- Periodicals; Solids -- Industrial applications -- Periodicals; 530.41
• DOI: 10.1002/pssa.202200581
• Languages: English
• ISSNs: 1862-6300

Abstract

Abstract : Active bifunctional electrocatalysts for both oxygen evolution reaction (OER) and oxygen reduction reaction (ORR) are badly required for high‐efficiency zinc–air batteries (ZABs). Herein, a Fe‐alloyed MoNi nanohybrid (MoNiFe) as bifunctional catalyst is reported. The alloyed MoNiFe architecture with the decreased size compared with MoNi is obtained by a hydrothermal reduction method, which enhances the exposed active sites and promotes the charge transfer. Accordingly, MoNiFe exhibits good bifunctionality, with a positive half‐wave potential (0.896 V) near Pt/C (0.812 V) in ORR reaction and a low overpotential (0.295 V) similar to IrO2 (0.29 V) in OER process. The as‐derived rechargeable ZAB cells based on the bifunctional MoNiFe catalyst show the peak power density of 58 mW cm −2 with a high open‐circuit voltage of 1.319 V. Thus, this work paves a new alloying avenue for synthesizing effective bifunctional electocatalysts for ZABs. Abstract : A Fe‐alloyed MoNi nanohybrid (MoNiFe) as bifunctional catalyst is prepared by a hydrothermal reduction method. Owing to the enhanced exposed active sites and promoted charge transfer, MoNiFe exhibits good oxygen evolution reaction (OER)/oxygen reduction reaction bifunctionality. The as‐derived rechargeable zinc–air battery (ZAB) cells based on the MoNiFe show the peak power density of 58 mW cm −2 with a high open‐circuit voltage and high cycling stability.