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  • A NiFeCu alloy anode cataly...
    Wang, Wei; Zhu, Huaiyu; Yang, Guangming; Park, Hee Jung; Jung, Doh Won; Kwak, Chan; Shao, Zongping

    Journal of power sources, 07/2014, Letnik: 258
    Journal Article

    In this study, a new anode catalyst based on a NiFeCu alloy is investigated for use in direct-methane solid oxide fuel cells (SOFCs). The influence of the conductive copper introduced into the anode catalyst layer on the performance of the SOFCs is systematically studied. The catalytic activity for partial oxidation of methane and coking resistance tests are proposed with various anode catalyst layer materials prepared using different methods, including glycine nitrate process (GNP), physical mixing (PM) and impregnation (IMP). The surface conductivity tests indicate that the conductivities of the NiFe-ZrO sub(2)/Cu (PM) and NiFe -ZrO sub(2)/Cu (IMP) catalysts are considerably greater than that of NiFe-ZrO sub(2)/Cu (GNP), which is consistent with the SEM results. Among the three preparation methods, the cell containing the NiFe-ZrO sub(2)/Cu (IMP) catalyst layer performs best on CH sub(4)-O sub(2) fuel, especially under reduced temperatures, because the coking resistance should be considered in real fuel cell conditions. The cell containing the NiFe-Zr0 sub(2)/Cu (IMP) catalyst layer also delivers an excellent operational stability using CH sub(4)-O sub(2) fuel for 100 h without any signs of decay. In summary, this work provides new alternative anode catalytic materials to accelerate the commercialization of SOFC technology.