Fabrication and performance of membrane solid oxide fuel cells with La0.75Sr0.25Cr0.5Mn0.5O3−δ impregnated anodes

A symmetrical solid oxide fuel cell prepared by dry-pressing and impregnating methods

“…This impregnating-heating cycle was repeated until the desired weight loading of LSCM was achieved. Finally, the cell was fired at 1100 • C for 2 h to produce the perovskite phase that was confirmed previously [14]. In some of the cells, a small amount of Sm-doped CeO 2 (SDC) or Ni as catalyst was added by addition of aqueous solutions of the corresponding nitrate salts (Ce 0.8 Sm 0.2 (NO 3 ) x or Ni(NO 3 ) 2 ).…”

“…After preparing the three-layer YSZ matrix, 32 wt.% of La 0.75 Sr 0.25 Cr 0.5 Mn 0.5 O 3−ı (LSCM) was introduced into the two porous electrode layers using an aqueous nitrate solution. This impregnating solution was prepared by adding La(NO 3 ) 3 , Sr(NO 3 ) 2 , Cr(NO 3 ) 3 , Mn(NO 3 ) 2 and urea to deionized water in the molar ratio 3:1:2:2:16, as described elsewhere [14]. After impregnation, the cell was heated at 300 • C for 20 min to decompose the nitrate ions and the urea.…”

“…However, it is well known that Ni-based anodes are not good candidates for operating with dry carbon-containing fuels due to the tendency of Ni to catalyze C-C bond formation [18]. However, a low concentration of small, highly dispersed Ni particles is unlikely to cause coking [14,17,19]. Therefore, in the present study, we attempted to introduce a small amount of Ni into the anode and cathode simultaneously, by impregnation of an aqueous nitrate solution containing La 3+ , Sr 2+ , Cr 3+ , Mn 2+ , Ni 2+ and urea with a molar ratio of 3:1:2:2:4:16.…”

Solid Oxide Fuel Cells

“…For example, La 0.75 Sr 0.25 Cr 0.5 Mn 0.5 O 3 (LSCM) perovskite oxide exhibited excellent redox stability and catalytic activity in both methane and hydrogen SOFCs [47][48][49]. LSCM powders were prepared using a sol-gel combustion method [50].…”

An amperometric NO2 sensor based on nano-structured La0.75Sr0.25Cr0.5Mn0.5O3−δ prepared by impregnating method

“…In this paper, an amperometric NO 2 sensor based on measuring currents upon application of a cathodic potential to nano-structured LSCM sensing electrode and Pt counter electrode on a CGO electrolyte for detecting NO 2 was proposed. The nano-structured LSCM particles were prepared in the porous CGO layer by impregnating method which is a well-known method in the development of heterogeneous catalysts for solid oxide fuel cells [26][27][28][29]. The detailed sensing characteristics of the sensor are reported and discussed here.…”