摘要
A highly efficient Ruddlesden-Popper structure anode material with a formula of Sr_(3)Fe_(1.3)Mo_(0.5)Ni_(0.2)O_(7-δ)(RP-SFMN)has been developed for hydrocarbon fueled solid oxide fuel cells(HF-SOFC)application.It is demonstrated that a nanostructured RP-SFMN anode decorated with in-situ exsolved Ni nanoparticles(Ni@RP-SFMN)has been successfully prepared by annealing the anode in reducing atmosphere similar to the operating conditions.The phase compositions,valence states,morphologies,and electrocatalytic activities of RP-SFMN material have been characterized in detail.In addition,the in-situ exsolution mechanism of the metallic Ni phase from the parent oxide is clearly explained by using density function theory calculation.The peak output power density at 800℃ is significantly enhanced from 0.163 to 0.409 W/cm^(2)while the electrode polarization resistance is effectively lowered from 0.96 to 0.30Ωcm^(2)by the substitution of B-site Fe by Ni,which is attributed to the improved electrocatalytic activities induced by the in-situ exsolved Ni nanocatalysts.Moreover,the single cell with RP-SFMN anode exhibits good stability in 3%H_(2)O humidified H_(2)and syngas for 110 and 60 h at 800℃,respectively.Our findings indicate that RP-SFMN is a greatly promising anode candidate of HF-SOFCs due to its good electrochemical performance and stability during the operation.
出处
《SusMat》
2022年第4期487-501,共15页
可持续发展材料（英文）
基金
This work was supported by National Natural Science Foundation of China(U21A20317,51602228,51502207).We also greatly thank the Core Facility of Wuhan University for XRD and XPS analysis and Large-scale Instrument&Equipment Sharing Foundation of Wuhan University.
