Power and carbon monoxide co-production by a proton-conducting solid oxide fuel cell with La0.6Sr0.2Cr0.85Ni0.15O3−δ for on-cell dry reforming of CH4 by CO2. Issue 19 (7th May 2020)

• Record Type: Journal Article
• Authors: Wei, Tong; Qiu, Peng; Jia, Lichao; Tan, Yuan; Yang, Xin; Sun, Shichen; Chen, Fanglin; Li, Jian
• Is Part Of: Journal of materials chemistry. Volume 8:Issue 19(2020)
• Page Start: 9806
• Page End: 9812
• Publication Date: 2020-05-07
• Subjects: Materials -- Research -- Periodicals; Chemistry, Analytic -- Periodicals; Environmental sciences -- Research -- Periodicals; 543.0284
• DOI: 10.1039/d0ta03458d
• Languages: English
• ISSNs: 2050-7488

Abstract

Abstract : Highly efficient on-cell dry reforming of CH4 for power and CO co-production by H-SOFCs is achieved with an engineered LSCN@Ni layer. Abstract : To directly use a CO2 –CH4 gas mixture for power and CO co-production by proton-conducting solid oxide fuel cells (H-SOFCs), a layer of in situ reduced La0.6 Sr0.2 Cr0.85 Ni0.15 O3− δ (LSCrN@Ni) is fabricated on a Ni–BaZr0.1 Ce0.7 Y0.1 Yb0.1 O3− δ (BZCYYb) anode-supported H-SOFC (H-DASC) for on-cell CO2 dry reforming of CH4 (DRC). For demonstrating the effectiveness of LSCrN@Ni, a cell without adding the LSCrN@Ni catalyst (H-CASC) is also studied comparatively. Fueled with H2, both H-CASC and H-DASC show similar stable performance with a maximum power density ranging from 0.360 to 0.816 W cm −2 at temperatures between 550 and 700 °C. When CO2 –CH4 is used as the fuel, the performance and stability of H-CASC decreases considerably with a maximum power density of 0.287 W cm −2 at 700 °C and a sharp drop in cell voltage from the initial 0.49 to 0.10 V within 20 h at 0.6 A cm −2 . In contrast, H-DASC demonstrates a maximum power density of 0.605 W cm −2 and a stable cell voltage above 0.65 V for 65 h. This is attributed to highly efficient on-cell DRC by LSCrN@Ni.