Ternary MnO2/NiCo2O4/NF with hierarchical structure and synergistic interaction as efficient electrocatalysts for oxygen evolution reaction
By Yan, Kai-Li; Shang, Xiao; Gao, Wen-Kun; Dong, Bin; Li, Xiao; Chi, Jing-Qi; Liu, Yan-Ru; Chai, Yong-Ming; Liu, Chen-Guang
Published in Journal of Alloys and Compounds
NULL
2017
Abstract
Abstract Ternary metal oxides MnO2/NiCo2O4 supported on nickel foam (NF) as electrocatalysts for oxygen evolution reaction (OER) have been fabricated via a two-step hydrothermal process. {NF} as support can provide excellent conductivity and 3 dimensional skeleton, which facilitate the utilization of active sites and mass transfer of electrolyte. The ternary MnO2/NiCo2O4/NF also possess the advantage of synergistic effect between MnO2 and NiCo2O4, implying the enhanced intrinsic activity for OER. XRD, {EDX} and {XPS} confirm the existence and distribution of each element of MnO2/NiCo2O4/NF. {SEM} shows the hierarchical structure of MnO2/NiCo2O4/NF with vertically aligned MnO2/NiCo2O4 nanoflakes covering on the surface of NF, which is in favor of the more exposed active sites and the fast dissipation of {O2} bubbles. Additionally, to clearly testify the significance of the vertically aligned MnO2/NiCo2O4 nanoflakes, non-vertical MnO2/NiCo2O4/NF sample (MnO2/NiCo2O4/NF-1) is prepared for comparing {OER} performances in the same condition. {OER} measurements in alkaline solution show that ternary MnO2/NiCo2O4/NF displays better electrocatalytic activity with a low overpotential of 340 mV at a current density of 10 mA cm?2 than other samples. Therefore, ternary metal oxides with hierarchical structure on {NF} may be a promising choice for excellent electrocatalysts for OER.
Microsoft is Ending Support for Windows 7
Microsoft will discontinue support for Windows 7 on January 14, 2020 which means Gamry will also be discontinuing support for Windows 7. If you are upgrading to Windows 10, like many companies and institutions, you need to be running Version 7 of our s oftware . Please note that only USB and Ethernet-based instruments can run in Version 7. Eligible users can download the latest version of our software through our online Client Portal .
If you haven't already registered your instrument, you can do so through the Client Portal .
Please email Technical Support if you have any questions regarding this transition. Please be sure to include your instrument model and serial number when contacting us.