Carbon Tolerant Fuel Electrodes for Reversible Sofc Operating on Carbon Dioxide Kalliopi Maria Papazisi, Dimitrios Tsiplakides, Stella Balomenou, Ivar Wærnhus, Crina S. Ilea, Arild Vik and Max Schautz E3S Web Conf., 16 (2017) 09003 Published online: 23 May 2017 DOI: 10.1051/e3sconf/20171609003