Jisi Li, Erling Zhao, Yang Zhao, Ruguang Wang, Jiaxin Guo, Quanlu Wang, Jing Mao, Tao Ling
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引用次数: 0
Abstract
Molecular catalysts can mediate fast and selective redox reactions under working conditions due to the flexible and adjustable coordination environment of their metal active centers. Therefore, the exploration of inorganic materials with structural and functional similarities to gifted molecular catalysts undoubtedly holds promise for highly active heterogeneous catalysts. Here, we report, for the first time, a molecular-like transition metal oxide, Mn2V2O7, whose coordination environment of the active Mn sites resembles that of a molecular polyoxometalate (POM) catalyst. We emphasize that Mn2V2O7 features strong redox capability, metal–oxygen covalency, and spin selectivity during catalytic reactions. These molecular-like functional properties have never been achieved in inorganic oxide materials and significantly boost the oxygen reduction reaction (ORR) activity of the Mn2V2O7 catalyst, which is among the most active oxide catalysts ever reported. Moreover, the Mn2V2O7-assembled Zn–air battery shows an ultrahigh peak power density of 455 mW cm–2 with reliable charging over 1000 cycles, outperforming the ever-reported state-of-the-art metal oxide, metal, and carbon catalyst-based devices.
期刊介绍:
The journal Chemistry of Materials focuses on publishing original research at the intersection of materials science and chemistry. The studies published in the journal involve chemistry as a prominent component and explore topics such as the design, synthesis, characterization, processing, understanding, and application of functional or potentially functional materials. The journal covers various areas of interest, including inorganic and organic solid-state chemistry, nanomaterials, biomaterials, thin films and polymers, and composite/hybrid materials. The journal particularly seeks papers that highlight the creation or development of innovative materials with novel optical, electrical, magnetic, catalytic, or mechanical properties. It is essential that manuscripts on these topics have a primary focus on the chemistry of materials and represent a significant advancement compared to prior research. Before external reviews are sought, submitted manuscripts undergo a review process by a minimum of two editors to ensure their appropriateness for the journal and the presence of sufficient evidence of a significant advance that will be of broad interest to the materials chemistry community.