Thermochemical splitting of carbon dioxide by lanthanum manganites — understanding the mechanistic effects of doping
This review investigates the effect of different dopants on the oxygen evolution and carbon dioxide splitting abilities of the lanthanum manganites. Particular focus was placed on the lanthanide, alkaline earth metals, redox-active transition metal, and non-redox active Group 3 metals. The review su...
| Main Authors: | , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
KeAi Communications Co., Ltd.
2022-12-01
|
| Series: | Energy Storage and Saving |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2772683522000280 |
| _version_ | 1827948775784579072 |
|---|---|
| author | Harriet Kildahl Hui Cao Yulong Ding |
| author_facet | Harriet Kildahl Hui Cao Yulong Ding |
| author_sort | Harriet Kildahl |
| collection | DOAJ |
| description | This review investigates the effect of different dopants on the oxygen evolution and carbon dioxide splitting abilities of the lanthanum manganites. Particular focus was placed on the lanthanide, alkaline earth metals, redox-active transition metal, and non-redox active Group 3 metals. The review suggests that a small ionic radius lanthanide on the A-site can increase the size discrepancy, leading to Mn-O6 octahedra tilting and more facile Mn-O bond breaking. Doping the A-site with a divalent alkaline earth element can increase the valance of the transition metal, leading to greater reduction capabilities. A transition metal with one electron in the eg orbital is the most effective for reduction while for oxidation, zero electrons in the high-energy eg orbitals is optimal. Finally, doping of the B-site with metals such as gallium or aluminium aids in sintering resistance and allows reactivity to remain constant over multiple cycles. Higher reduction temperatures and moderate re-oxidation temperatures also promote higher fuel yields as does the active reduction of the perovskite under hydrogen, although the total energy consumption implications of this are unknown. Far more is known about the mechanism of the reduction reaction than the oxidation reaction, therefore more research in this area is required. |
| first_indexed | 2024-04-09T12:59:39Z |
| format | Article |
| id | doaj.art-1c3a61711374489a9f7e5fbf3cb75615 |
| institution | Directory Open Access Journal |
| issn | 2772-6835 |
| language | English |
| last_indexed | 2024-04-09T12:59:39Z |
| publishDate | 2022-12-01 |
| publisher | KeAi Communications Co., Ltd. |
| record_format | Article |
| series | Energy Storage and Saving |
| spelling | doaj.art-1c3a61711374489a9f7e5fbf3cb756152023-05-13T04:26:03ZengKeAi Communications Co., Ltd.Energy Storage and Saving2772-68352022-12-0114309324Thermochemical splitting of carbon dioxide by lanthanum manganites — understanding the mechanistic effects of dopingHarriet Kildahl0Hui Cao1Yulong Ding2Corresponding authors.; School of Chemical Engineering, University of Birmingham, B15 2TT, United KingdomSchool of Chemical Engineering, University of Birmingham, B15 2TT, United KingdomCorresponding authors.; School of Chemical Engineering, University of Birmingham, B15 2TT, United KingdomThis review investigates the effect of different dopants on the oxygen evolution and carbon dioxide splitting abilities of the lanthanum manganites. Particular focus was placed on the lanthanide, alkaline earth metals, redox-active transition metal, and non-redox active Group 3 metals. The review suggests that a small ionic radius lanthanide on the A-site can increase the size discrepancy, leading to Mn-O6 octahedra tilting and more facile Mn-O bond breaking. Doping the A-site with a divalent alkaline earth element can increase the valance of the transition metal, leading to greater reduction capabilities. A transition metal with one electron in the eg orbital is the most effective for reduction while for oxidation, zero electrons in the high-energy eg orbitals is optimal. Finally, doping of the B-site with metals such as gallium or aluminium aids in sintering resistance and allows reactivity to remain constant over multiple cycles. Higher reduction temperatures and moderate re-oxidation temperatures also promote higher fuel yields as does the active reduction of the perovskite under hydrogen, although the total energy consumption implications of this are unknown. Far more is known about the mechanism of the reduction reaction than the oxidation reaction, therefore more research in this area is required.http://www.sciencedirect.com/science/article/pii/S2772683522000280CO2 splittingThermochemical cyclePerovskiteEnergy conversionDoping |
| spellingShingle | Harriet Kildahl Hui Cao Yulong Ding Thermochemical splitting of carbon dioxide by lanthanum manganites — understanding the mechanistic effects of doping Energy Storage and Saving CO2 splitting Thermochemical cycle Perovskite Energy conversion Doping |
| title | Thermochemical splitting of carbon dioxide by lanthanum manganites — understanding the mechanistic effects of doping |
| title_full | Thermochemical splitting of carbon dioxide by lanthanum manganites — understanding the mechanistic effects of doping |
| title_fullStr | Thermochemical splitting of carbon dioxide by lanthanum manganites — understanding the mechanistic effects of doping |
| title_full_unstemmed | Thermochemical splitting of carbon dioxide by lanthanum manganites — understanding the mechanistic effects of doping |
| title_short | Thermochemical splitting of carbon dioxide by lanthanum manganites — understanding the mechanistic effects of doping |
| title_sort | thermochemical splitting of carbon dioxide by lanthanum manganites understanding the mechanistic effects of doping |
| topic | CO2 splitting Thermochemical cycle Perovskite Energy conversion Doping |
| url | http://www.sciencedirect.com/science/article/pii/S2772683522000280 |
| work_keys_str_mv | AT harrietkildahl thermochemicalsplittingofcarbondioxidebylanthanummanganitesunderstandingthemechanisticeffectsofdoping AT huicao thermochemicalsplittingofcarbondioxidebylanthanummanganitesunderstandingthemechanisticeffectsofdoping AT yulongding thermochemicalsplittingofcarbondioxidebylanthanummanganitesunderstandingthemechanisticeffectsofdoping |