Antiperovskite Intermetallic Nanoparticles for Enhanced Oxygen Reduction. (17th December 2019)

• Record Type: Journal Article
• Authors: Zhang, Hao; Xia, Wei; Shen, Haoming; Guo, Wenhan; Liang, Zibin; Zhang, Kexin; Wu, Yingxiao; Zhu, Bingjun; Zou, Ruqiang
• Is Part Of: Angewandte Chemie. Volume 132:Number 5(2020)
• Page Start: 1887
• Page End: 1893
• Publication Date: 2019-12-17
• Subjects: Antiperowskite -- Metall-organische Gerüste -- Sauerstoffreduktionsreaktion -- Stickstoffsubstitution -- Zink-Luft-Batterien; Chemistry -- Periodicals; 540
• DOI: 10.1002/ange.201911943
• Languages: English
• ISSNs: 0044-8249

Abstract

Abstract: Antiperovskite Co3 InC0.7 N0.3 nanomaterials with highly enhanced oxygen reduction reaction (ORR) performance were prepared by tuning nitrogen contents through a metal–organic framework (MOF)‐derived strategy. The nanomaterial surpasses all reported noble‐metal‐free antiperovskites and even most perovskites in terms of onset potential (0.957 V at J =0.1 mA cm −2 ) and half‐wave potential (0.854 V). The OER and zinc–air battery performance demonstrate its multifunctional oxygen catalytic activities. DFT calculation was performed and for the first time, a 4 e − dissociative ORR pathway on (200) facets of antiperovskite was revealed. Free energy studies showed that nitrogen substitution could strengthen the OH desorption as well as hydrogenation that accounts for the enhanced ORR performance. This work expands the scope for material design via tailoring the nitrogen contents for optimal reaction free energy and hence performance of the antiperovskite system. Abstract : Dem Cobalt Beine machen : Cobalt ist ein bezüglich der Sauerstoffreduktionsreaktion (ORR) inertes Metall, kann nun aber für diese Reaktion aktiviert werden, indem die intermetallische Antiperowskitphase Co3 InC0.7 N0.3 gebildet wird. Abstimmen des C/N‐Verhältnisses stärkt die Desorption und schwächt zugleich den Hydrierungsschritt, was die ORR‐Aktivität optimiert.