SOFC anodes for direct oxidation of hydrogen and methane fuels containing H2S

Electrochemical Analysis of a System Based on W and Ni Combined with CeO2 as Potential Sulfur‐tolerant SOFC Anode

“…The aforementioned XPS results were in good agreement with the XRD results, and implied that the cerium is as Ce 4+ in both fresh and reduced samples and as Ce 3+ in the sample exposed to H 2 S. The sulfur S 2p spectrum ( Figure 2b) reveals one peak at BE of 161.2 eV and the other at 168.9 eV. The former likely corresponds to metal sulfur and the latter derived from an oxygen containing sulfur species [16]. In the Ni 2p spectra (Figure 2c), the fresh component shows two peaks at 872.7 eV (2p 1/2 ) and 855.6 eV (2p 3/2 ) with a shape-up satellite at 861.4 eV that is characteristic of Ni 2+ in NiWO 4 [17].…”

Effect of substitution with Cr3+ and addition of Ni on the physical and electrochemical properties of Ce0.9Sr0.1VO3 as a H2S-active anode for solid oxide fuel cells

“…The additional plant required both adds to costs and increases the footprint of the SOFC powerplant, and so significantly limits the widespread application of SOFC technology. For these reasons, solid oxide fuel cells research is being directed to investigation and development of fuel cells capable of utilizing fuels containing impure H 2 , CO and even sulfur-based fuels, instead of requiring very expensive pure H 2 [15][16][17][18][19][20][21][22][23][24]. To this end, there is interest in finding alternative anodes, including composite materials, that will catalyze methane oxidation but not carbon growth, and that are both active and stable in the presence of H 2 S [15][16][17][18][19][20][21][22][23][24].…”

Effect of Pd-impregnation on performance, sulfur poisoning and tolerance of Ni/GDC anode of solid oxide fuel cells

“…R E increased to 1.6 U cm 2 after polarization at 200 mA cm À2 for 50 h, which is w3.5 times higher as compared to the R E value of 0.44 U cm 2 before polarization treatment in H 2 SeH 2 fuel. The significant increase of the R E value is a clear indication of the H 2 S poisoning effect on Ni/GDC anodes [22].…”