Mo, Fe bimetallic carbide composite as high stability electrocatalyst for oxygen reduction reaction. Issue 3 (June 2022)

• Record Type: Journal Article
• Authors: Deng, Ximing; Imhanria, Sarah; Sun, Yan; Zhang, Miao; Cheng, Yangshuai; Wang, Wei
• Is Part Of: Journal of environmental chemical engineering. Volume 10:Issue 3(2022)
• Publication Date: 2022-06
• Subjects: Carbon-based electrocatalyst -- Bimetallic carbide -- Zinc-air battery; Chemical engineering -- Environmental aspects -- Periodicals; Environmental engineering -- Periodicals; Chemical engineering -- Environmental aspects; Environmental engineering; Periodicals; 660.0286
• DOI: 10.1016/j.jece.2022.108052
• Languages: English
• ISSNs: 2213-2929

Abstract

Abstract: Developing inexpensive but efficient electrocatalysts for oxygen reduction reactions (ORR) is critical to the design of zinc-air battery (ZAB). Here, we report a good ORR electrocatalyst (MoFeCx -NC) composed of nitrogen-doped carbon armored by ferro-molybdenum binary carbides. The physical characterization of MoFeCx -NC by X-ray diffraction (XRD), transmission electron microscopy (TEM) and X-ray photoelectron spectroscopy (XPS) show that MoFeCx -NC is composed of amorphous bimetallic carbides and N-doped carbon. In addition, the electrochemical test shows that its more positive onset potential of 0.962 V and better half-wave potential of 0.847 V, almost close to Pt/C (Eonset = 0.957 V, E1/2 = 0.854 V). Furthermore, the MoFeCx -NC assembled ZAB exhibits a good peak power density of 79.14 mW cm −2 and an impressive 1.40 V discharge voltage, indicating that the obtained MoFeCx -NC is an ideal for the future ORR electrocatalyst. Graphical Abstract: ga1 Highlights: A Mo, Fe bimetallic carbide composite was prepared. The MoFeCx -NC has good ORR performance. As-assembled ZAB exhibits high open circuit voltage and specific capacity.