Fe-Doped Ceria-Based Ceramic Cathode for High-Efficiency CO 2 Electrolysis in Solid Oxide Electrolysis Cell.
Lijie ZhangYunan JiangKang ZhuNai ShiZohaib Ur RehmanRanran PengChangrong XiaPublished in: Small methods (2024)
In the quest for sustainable energy solutions, solid oxide electrolysis cell (SOEC) emerges as a key technology for converting CO 2 into fuels and valuable chemicals. This work focuses on pure ceramic Fe x Sm 0.2 Ce 0.8 O 2- δ (xFe-SDC) as the fuel electrodes, and Sr-free ceria-based ceramic electrodes can be successfully constructed for x ≤ 0.05. The incorporation of Fe into the ceria lattice increases the oxygen vacancy concentration and promotes the formation of catalytic sites crucial for the CO 2 reduction reaction (CO 2 RR). Density functional theory calculations indicate that Fe enhances electrochemical performance by decreasing the CO 2 RR energy barrier and facilitating oxygen ion diffusion. At 800 °C and 1.5 V, single cells with 0.05Fe-SDC cathodes manifest attractive performance, attaining current densities of -1.98 and -2.26 A cm -2 under 50% CO 2 /CO and pure CO 2 atmospheres, respectively. These results suggest the great potential of xFe-SDC electrodes as promising avenues for high-performance fuel electrodes in SOEC.
Keyphrases
- density functional theory
- reduced graphene oxide
- metal organic framework
- high efficiency
- molecular dynamics
- visible light
- single cell
- gold nanoparticles
- cell therapy
- aqueous solution
- induced apoptosis
- solid state
- carbon nanotubes
- oxidative stress
- cell proliferation
- cell cycle arrest
- molecular dynamics simulations
- mass spectrometry
- signaling pathway
- tandem mass spectrometry
- human health
- pi k akt
- high resolution
- ion batteries
- climate change