La0.75Sr0.25Cr0.5Mn0.5O3-δ-Ce0.8Sm0.2O1.9 as composite electrodes in symmetric solid electrolyte cells for electrochemical removal of nitric oxide
(2020) In Applied Catalysis B: Environmental 264.- Abstract
Symmetric solid electrolyte cells with La0.75Sr0.25Cr0.5Mn0.5O3-δ (LSCM)-Ce0.8Sm0.2O1.9 (SDC) composite electrodes are employed for nitric oxide (NO) removal. The LSCM powders are synthesized and the cells with LSCM-SDC composite electrodes are fabricated successfully. The results show that moderate SDC addition in LSCM electrode improves the cell performance due to the expansion of three phase boundaries (TPBs). The electrode with 30 wt% SDC has the highest NO conversion of 69.2% and the lowest polarization resistance at 750 °C in 1000 ppm NO. The cathodic polarization activates the cathode because of the Cr/Mn ions reduction, more surface oxygen... (More)
Symmetric solid electrolyte cells with La0.75Sr0.25Cr0.5Mn0.5O3-δ (LSCM)-Ce0.8Sm0.2O1.9 (SDC) composite electrodes are employed for nitric oxide (NO) removal. The LSCM powders are synthesized and the cells with LSCM-SDC composite electrodes are fabricated successfully. The results show that moderate SDC addition in LSCM electrode improves the cell performance due to the expansion of three phase boundaries (TPBs). The electrode with 30 wt% SDC has the highest NO conversion of 69.2% and the lowest polarization resistance at 750 °C in 1000 ppm NO. The cathodic polarization activates the cathode because of the Cr/Mn ions reduction, more surface oxygen vacancies and Cr metal exsolution. The cell has good tolerances for H2O, CO2, and SO2, but excess O2 competes with NO for TPBs seriously. The sufficient stability and flexible operation mode of the cell are also proved. Finally, the NO adsorption mechanism on LSCM surface is revealed by density functional theory (DFT) calculations.
(Less)
- author
- Li, Wenjie ; Liu, Xiaozhen ; Yu, Han LU ; Zhang, Shuyuan and Yu, Hongbing
- organization
- publishing date
- 2020
- type
- Contribution to journal
- publication status
- published
- subject
- keywords
- Density functional theory, Electrochemical reduction, LaSrCrMnO-CeSmO, Nitric oxide, Solid electrolyte cell
- in
- Applied Catalysis B: Environmental
- volume
- 264
- article number
- 118533
- publisher
- Elsevier
- external identifiers
-
- scopus:85076545486
- ISSN
- 0926-3373
- DOI
- 10.1016/j.apcatb.2019.118533
- language
- English
- LU publication?
- yes
- id
- ad95037b-c183-410c-950a-90c318c615e5
- date added to LUP
- 2020-01-02 11:07:01
- date last changed
- 2022-04-18 19:33:32
@article{ad95037b-c183-410c-950a-90c318c615e5, abstract = {{<p>Symmetric solid electrolyte cells with La<sub>0.75</sub>Sr<sub>0.25</sub>Cr<sub>0.5</sub>Mn<sub>0.5</sub>O<sub>3-δ</sub> (LSCM)-Ce<sub>0.8</sub>Sm<sub>0.2</sub>O<sub>1.9</sub> (SDC) composite electrodes are employed for nitric oxide (NO) removal. The LSCM powders are synthesized and the cells with LSCM-SDC composite electrodes are fabricated successfully. The results show that moderate SDC addition in LSCM electrode improves the cell performance due to the expansion of three phase boundaries (TPBs). The electrode with 30 wt% SDC has the highest NO conversion of 69.2% and the lowest polarization resistance at 750 °C in 1000 ppm NO. The cathodic polarization activates the cathode because of the Cr/Mn ions reduction, more surface oxygen vacancies and Cr metal exsolution. The cell has good tolerances for H<sub>2</sub>O, CO<sub>2</sub>, and SO<sub>2</sub>, but excess O<sub>2</sub> competes with NO for TPBs seriously. The sufficient stability and flexible operation mode of the cell are also proved. Finally, the NO adsorption mechanism on LSCM surface is revealed by density functional theory (DFT) calculations.</p>}}, author = {{Li, Wenjie and Liu, Xiaozhen and Yu, Han and Zhang, Shuyuan and Yu, Hongbing}}, issn = {{0926-3373}}, keywords = {{Density functional theory; Electrochemical reduction; LaSrCrMnO-CeSmO; Nitric oxide; Solid electrolyte cell}}, language = {{eng}}, publisher = {{Elsevier}}, series = {{Applied Catalysis B: Environmental}}, title = {{La<sub>0.75</sub>Sr<sub>0.25</sub>Cr<sub>0.5</sub>Mn<sub>0.5</sub>O<sub>3-</sub>δ-Ce<sub>0.8</sub>Sm<sub>0.2</sub>O<sub>1.9</sub> as composite electrodes in symmetric solid electrolyte cells for electrochemical removal of nitric oxide}}, url = {{http://dx.doi.org/10.1016/j.apcatb.2019.118533}}, doi = {{10.1016/j.apcatb.2019.118533}}, volume = {{264}}, year = {{2020}}, }