Kuang‐Hsu Wu1, Qingcong Zeng1, Bingsen Zhang2, Xue Leng1, Dangsheng Su2, I. Gentle1, Dawei Wang3,1
1School of Chemistry and Molecular Biosciences, The University of Queensland, Brisbane, QLD 4072, Australia
2Shengyang National Laboratory for Materials Science; Institute of Metal Research; Chinese Academy of Sciences; Shengyang, Liaoning 110016 China
3School of Chemical Engineering, The University of New South Wales, Sydney, NSW 2052, Australia
Tóm tắt
AbstractNon‐precious metal oxide/carbon hybrid electrocatalysts are of increasing importance for the oxygen reduction reaction (ORR). A synergistic effect is commonly used to explain the superior ORR activity exerted by metal oxide/nanocarbon hybrids, and this effect is attributed to covalently coupled interfaces between the two materials. However, the origin of the high activity, the structure, and the electrocatalytic nature of the interface remain unclear. By combining X‐ray photoelectron spectroscopy with synchrotron far‐infrared spectroscopy, we resolved the interface structure between spinel manganese oxide nanocrystals and graphene oxide nanoribbons, and the role of this interface in the promoted ORR. Moreover, we demonstrated the excellent ORR activity by a functional synergism of the hybrid constituents through a series of comparative electrochemical experiments.
