Co/CoOx Nanoparticles Embedded on Carbon for Efficient Catalysis of Oxygen Evolution and Oxygen Reduction Reactions. Issue 10 (2nd May 2018)

• Record Type: Journal Article
• Authors: Li, Min; Bai, Lu; Wu, Shujie; Wen, Xudong; Guan, Jingqi
• Is Part Of: ChemSusChem. Volume 11:Issue 10(2018)
• Page Start: 1722
• Page End: 1727
• Publication Date: 2018-05-02
• Subjects: cobalt oxide -- metal–organic framework -- oxygen evolution -- oxygen reduction -- water oxidation; Green chemistry -- Periodicals; Sustainable engineering -- Periodicals; Chemistry -- Periodicals; Chemical engineering -- Periodicals; 660
• DOI: 10.1002/cssc.201800489
• Languages: English
• ISSNs: 1864-5631

Abstract

Abstract: The oxygen evolution reaction (OER) and oxygen reduction reaction (ORR) are important electrochemical reactions to realize clean energy technologies. Herein, we prepared a hybrid electrocatalyst consisting of Co/CoO x nanoparticles embedded in amorphous carbon through the simple pyrolysis of cobalt‐based zeolitic terephthalate frameworks. The pyrolysis temperature significantly influenced the structure morphology and catalytic behavior. Good contact between Co/CoO x and amorphous carbon resulted in a high catalytic efficiency. The hybrid obtained under pyrolysis temperature of 600 °C exhibited the highest performance for OER, offering a stable current density of 10 mA cm −2 at 277 mV in basic media. Besides good OER behavior, it also showed good ORR performance [onset potential: ∼0.87 V vs. the reversible hydrogen electrode (RHE), diffusion‐limiting current density: ∼4.9 mA cm −2 ]. This work describes a novel and efficient catalyst, and greatly expands the scope of low‐cost Co‐based electrocatalysts for various electrochemical reactions without the need for N‐containing ligands. Abstract : Close contact is key : Co/CoO x embedded onto amorphous carbon is prepared through simple pyrolysis of Co‐based metal–organic frameworks (MOFs) for efficient oxygen evolution and oxygen reduction reactions. Good contact between Co/CoO x and amorphous carbon results in high catalytic efficiency.