caa a22 4500 606174400 CHVBK 20210128100737.0 cr unu---uuuuu 210128e20151101xx s 000 0 eng 10.1007/s11244-015-0491-9 doi (NATIONALLICENCE)springer-10.1007/s11244-015-0491-9 Reaction Rate Enhancement During the Electrocatalytic Synthesis of Ammonia in a BaZr0.7Ce0.2Y0.1O2.9 Solid Electrolyte Cell [Elektronische Daten] [E. Vasileiou, V. Kyriakou, I. Garagounis, A. Vourros, A. Manerbino, W. Coors, M. Stoukides] The catalytic and electrocatalytic synthesis of ammonia was studied in a proton conducting double-chamber solid electrolyte cell. The BaZr0.7Ce0.2Y0.1O2.9 (BZCY72) proton conducting ceramic was used as the electrolyte with a Ni-BZCY72 cermet and a Pt film serving as cathodic and anodic electrodes, respectively. The reaction was studied at atmospheric pressure and at temperatures between 450 and 700°C, under both, open- and closed-circuit conditions. A peculiar reaction rate enhancement was observed when the cell returned to open-circuit after operating under closed-circuit for a certain time. A possible explanation of this new phenomenon is that a fraction of protons electrochemically transported to the cathode, is "stored” in the Ni-BZCY72 electrode in the form of a highly reactive hydride which, upon current interruption, reacts with adsorbed N species to produce ammonia. Springer Science+Business Media New York, 2015 Ammonia synthesis nationallicence Proton conducting cells nationallicence Post-electrochemical reaction rate enhancement nationallicence Vasileiou E. Department of Chemical Engineering, Aristotle University, Thessaloniki, Greece aut Kyriakou V. Department of Chemical Engineering, Aristotle University, Thessaloniki, Greece aut Garagounis I. Department of Chemical Engineering, Aristotle University, Thessaloniki, Greece aut Vourros A. Department of Chemical Engineering, Aristotle University, Thessaloniki, Greece aut Manerbino A. CoorsTek Inc., 80401, Golden, CO, USA aut Coors W. CoorsTek Inc., 80401, Golden, CO, USA aut Stoukides M. Department of Chemical Engineering, Aristotle University, Thessaloniki, Greece aut Topics in Catalysis Springer US; http://www.springer-ny.com 58/18-20(2015-11-01), 1193-1201 1022-5528 58:18-20<1193 2015 58 11244 https://doi.org/10.1007/s11244-015-0491-9 text/html Onlinezugriff via DOI BK010053 XK010053 XK010000 Metadata rights reserved Springer special CC-BY-NC licence nationallicence 1 research-article jats NATIONALLICENCE NATIONALLICENCE NL-springer NATIONALLICENCE 856 40 https://doi.org/10.1007/s11244-015-0491-9 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Vasileiou E. Department of Chemical Engineering, Aristotle University, Thessaloniki, Greece aut NATIONALLICENCE 700 1- Kyriakou V. Department of Chemical Engineering, Aristotle University, Thessaloniki, Greece aut NATIONALLICENCE 700 1- Garagounis I. Department of Chemical Engineering, Aristotle University, Thessaloniki, Greece aut NATIONALLICENCE 700 1- Vourros A. Department of Chemical Engineering, Aristotle University, Thessaloniki, Greece aut NATIONALLICENCE 700 1- Manerbino A. CoorsTek Inc., 80401, Golden, CO, USA aut NATIONALLICENCE 700 1- Coors W. CoorsTek Inc., 80401, Golden, CO, USA aut NATIONALLICENCE 700 1- Stoukides M. Department of Chemical Engineering, Aristotle University, Thessaloniki, Greece aut NATIONALLICENCE 773 0- Topics in Catalysis Springer US; http://www.springer-ny.com 58/18-20(2015-11-01), 1193-1201 1022-5528 58:18-20<1193 2015 58 11244