CeO 2 -Y 2 O 3 -ZrO 2 Membrane with Enhanced Molten Salt Corrosion Resistance for Solid Oxide Membrane (SOM) Electrolysi
- PDF / 5,269,349 Bytes
- 14 Pages / 593.972 x 792 pts Page_size
- 46 Downloads / 170 Views
TRODUCTION
NOWADAYS or even in the future, metallic materials will still be represented as the most widely used structural materials.[1] Searching for new methods for facile, sustainable, and energy-efficient production of structural/functional metals/alloys/composites has become high priority in the new century.[1–10] In particular, molten salt processing method provides a unique opportunity to produce metallic materials where traditional methods (such as gas-based pyro-reduction, etc.) are not feasible.[11] Since the year 2000, a new molten salt electroreduction process named FFC Cambridge process has been extensively investigated for the direct electrochemical production of metals and alloys in CaCl2-based molten salts.[2,4,5,12–19] In this method, solid metal oxides (MOs) that are served as the cathode, oxygen component contained in the MOs can
XINGLI ZOU, Associate Professor, XIN LI and BIN SHEN, Master Students, and XIONGGANG LU, QIAN XU, and WEIZHONG DING, Professors, are with the State Key Laboratory of Advanced Special Steel & Shanghai Key Laboratory of Advanced Ferrometallurgy & School of Materials Science and Engineering, Shanghai University, Shanghai 200072, China. Contact e-mails: [email protected]; [email protected] ZHONGFU ZHOU, Professor, is with the State Key Laboratory of Advanced Special Steel & Shanghai Key Laboratory of Advanced Ferrometallurgy & School of Materials Science and Engineering, Shanghai University, and also Lecturer with the Institute of Mathematics and Physics, Aberystwyth University, Aberystwyth SY23 3BZ, UK. Manuscript submitted May 6, 2016. METALLURGICAL AND MATERIALS TRANSACTIONS B
be electrochemically ionized from the cathode (MOx + 2xe fi M + xO2), then the oxygen ions will dissolve in molten salts and discharge at the anode, therefore, pure metals can be directly produced at the cathode.[4,5] This innovative molten salt-based electroreduction process has great potential for the low cost production of various metals, alloys, and composites.[4,5,12–19] Generally, the typical anode electrode used in the molten salt-based electroreduction process is consumable graphite-based anode.[20] However, the graphite-based anode is commonly degraded by the formation of anodic products COx. As a result, the electrolysis system will be influenced by the COx-related side reactions (e.g., CO2 + O2 fi CO32; CO32 + 4e fi C + 3O2).[20] In order to avoid the generation of greenhouse gases (CO2, CCl4, C2Cl6, etc.).[4] and their related side reactions and improve the reaction speed during the electroreduction process, an inert anode is far more desirable than the graphite-based consumable anode. Hence, searching for appropriate inert anode for the novel electroreduction process has become the focus in recent years.[21,22] The solid oxide membrane (SOM) electroreduction process utilizes an inert yttria-stabilized zirconia (YSZ) oxygen ion conducting membrane as the assembled anode to control the electroreduction process in molten salts.[6–8,23–35] This improved controllable electroreduction meth
Data Loading...
