Iron-based electrode materials for solid oxide fuel cells and electrolysers

Abstract

Iron-based electrode materials are widely investigated for robust and high-performance SOCs because of their low-cost and the appropriate valence stability of Fe–O bond to exhibit excellent redox activity across a wide range of electrode functions.

Robust Ruddlesden‐Popper phase Sr3Fe1.3Mo0.5Ni0.2O7‐δ decorated with in‐situ exsolved Ni nanoparticles as an efficient anode for hydrocarbon fueled solid oxide fuel cells

“…Perovskite type (ABO 3 ) mixed ionic-electronic conducting oxides, such as La 0.75 Sr 0.25 Cr 0.5 Mn 0.5 O 3 , Y-doped SrTiO 3 , Sr 2 MgMoO 6−δ , and Sr 2 Fe 1.5 Mo 0.5 O 6−δ , have attracted much attention due to their excellent long-term stability and resistance to carbon deposition and sulfur poisoning. [10][11][12][13][14] However, their electrocatalytic activity and electrochemical performance are inferior compared with traditional Ni-based anodes. In this context, a series of novel alternative anode materials have been explored to balance the electrocatalytic activity and long-term stability.…”

“…Currently, extensive efforts have been focused on the development of novel alternative anode materials because the‐state‐of‐art Ni‐based anodes suffer from poor long‐term stability, severe carbon coking, and sulfur poisoning when fueled with hydrocarbon fuel. Perovskite type (ABO 3 ) mixed ionic‐electronic conducting oxides, such as La 0.75 Sr 0.25 Cr 0.5 Mn 0.5 O 3 , Y‐doped SrTiO 3 , Sr 2 MgMoO 6−δ , and Sr 2 Fe 1.5 Mo 0.5 O 6−δ , have attracted much attention due to their excellent long‐term stability and resistance to carbon deposition and sulfur poisoning 10–14 . However, their electrocatalytic activity and electrochemical performance are inferior compared with traditional Ni‐based anodes.…”

Phase transition with in situ exsolution nanoparticles in the reduced Pr0.5Ba0.5Fe0.8Ni0.2O3−δ electrode for symmetric solid oxide cells

“…1 Moreover, the solid oxide cell (SOC) technology has shown promise as a clean and efficient energy conversion and CO 2 utilization approach. 2 In fact, highly efficient SOCs can work either in fuel cell mode as SOFCs (solid oxide fuel cells) or in electrolysis cell mode as SOECs (solid oxide electrolysis cells). SOFCs can convert the chemical energy of a variety of fuels into clean electricity with high thermodynamic efficiencies, 3,4 while SOECs operate in the reverse manner, splitting water or carbon dioxide to produce H 2 , CO and O 2 .…”

Nickel-Containing Perovskites, PrNi0.4Fe0.6O3–δ and PrNi0.4Co0.6O3–δ, as Potential Electrodes for Protonic Ceramic Electrochemical Cells

“…Here, one of the possible approaches consists in the design of SOFCs based on proton-conducting electrolytes (so-called protonic ceramic fuel cells or PCFCs), which offer desirable performance at reduced operational temperatures due to the high ionic conductivity as a result of proton transportation [ 21 , 22 , 23 , 24 ]. Despite the attractiveness of PCFCs, the selection of suitable electrode materials continues to be problematic due to the need to combine superior electrochemical performance with satisfactory compatibility [ 25 , 26 , 27 , 28 , 29 ].…”