Ceria-Co-Cu-based SOFC anode for direct utilisation of methane or ethanol as fuels

Abstract

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Catalytic study of efficient nanocomposites {Ni0.5 Zn0.5−x Cex -oxides electrodes} for natural gas-fed fuel cells

“…Furthermore, the anode and cathode should, exhibit high catalytic activity for H 2 oxidation reaction (HOR) and O 2 reduction reaction (ORR), respectively [4,5]. However, Ni-oxide mixed with oxide ion conductor (yttria-stabilized zirconia (YSZ) or samarium-doped ceria (SDC)) composite is one of the most frequently used anode materials for SOFCs [6]. The ion-conducting phase is generally used to adjust the thermal expansion coefficient (TEC) with electrolyte and to extend TPBs.…”

“…Therefore, study the catalytic effect of such materials is highly desirable to obtain the overall high and stable performance of device. In previous study it is reported that Nickel-Copper (Ni-Cu) alloy could not only help to reduce carbon deposition at anodes, but due to low melting temperature its use is limited [6,14]. In addition, Palladium-Nickel (Pd-Ni) composites anode showed favorable tolerance to carbon deposition however severe carbon deposition was still observed due to larger amount of Ni-oxide [15].…”

Influence of novel anode design on the performance and coke resistance towards methane directly-fed solid oxide fuel cells

“…In Sarruf et al [18,19], the ability of our developed ceria-Co-Cu electrocatalyst to operate with direct carbonaceous fuels such as methane and ethanol was demonstrated well. However, not many works in the literature have focused on the thermal compatibility of nickel-free anodes and electrolyte materials.…”

Effects of Sn doping on the manufacturing, performance and carbon deposition of Ni/ScSZ cells in solid oxide fuel cells

“…Coupled with combined heat and power system (CHP), the SOFC efficiency can reach up to 90% [2,3]. The key distinction between SOFCs and low-temperature fuel cells is that aside from pure hydrogen the former can operate with alternative fuels, including bio-hythane [4,5], ethanol [6][7][8], kerosene [9], propane [10][11][12], ammonia [13,14], syngas [15], methane [16][17][18][19][20], and biogas [14,[21][22][23][24][25][26], where CO also serves as a reactant in the electrochemical reactions [14,19,[27][28][29]. This ability is a remarkable advantage given the high cost of pure hydrogen required in low-temperature fuel cells although when hydrogen produced from renewable energy [30,31].…”

“…Although Ni is an excellent catalyst for both electrochemical oxidation reaction and reforming reaction in producing hydrogen and syngas (H2 and CO) [44][45][46][47][48], Ni also prone to carbon deposition. Hence, Ni-free anode with alternative metal [6,17,49] and perovskites material [50,51] On the other hand, Singh et al [42] and Lay et al [61] reported no significant performance difference and higher amounts of carbon observed on the Sn doped cells compared to the undoped cells with either low steam to carbon ratio. Troskialina et al [27] and Jiang et al [60] tested Sn-Ni/YSZ with dry biogas fuel instead of humidified hydrocarbon fuel.…”