Remarkable chemical adsorption of manganese-doped titanate for direct carbon dioxide electrolysis

Qi, Wentao; Gan, Yun; Yin, Di; Li, Zhenyu; Wu, Guojian; Xie, Kui; Wu, Yucheng

doi:10.1039/c4ta00344f

Cited by 152 publications

(90 citation statements)

References 42 publications

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“…Using pure CO 2 , without addition of reducing gas (e.g., H 2 ) or pre-reduction of the electrode, the current density at an applied voltage of 1.5 V is found to increase from 0.47 A cm À2 at 700 C to 1.80 A cm À2 at 850 C. The I-V curves exhibit distinct non-linear behavior. This phenomenon has also been observed in other studies where perovskite-type oxides are used as electrodes for CO 2 or H 2 O electrolysis, without premixing of the feed gases with CO or H 2 , 7,9,10,[43][44][45] and which is in contrast to the linear I-V curves observed when Ni-YSZ based cathodes are used.…”

Section: Electrochemical Performancesupporting

confidence: 76%

“…Compared to the Ni-YSZ cermet electrode, where the electrochemical reduction is conned to the vicinity of the triple-phase boundary (TPB) lines, ceramic oxides with mixed ionic-electronic conductivity have the advantage in that they extend the active region over the entire gas/solid phase interface. Many mixed-conducting perovskite-type oxides have been tested for use as cathode for CO 2 electrolysis such as La 0.75 Sr 0.25 Cr 0.5 Mn 0.5 O 3 (LSCM), [6][7][8] La x Sr 1Àx TiO 3Àd (LST), [9][10][11] La 0.8 Sr 0.2 FeO 3Àd (LSF), 12 and Sr 2 Fe 1.5 Mo 0.5 O 6Àd (SFM). [13][14][15] Amongst these, the iron-based materials LSF and SFM are reported to exhibit the highest electrocatalytic activity for CO 2 reduction in the intermediate to high temperature range (600-850 C).…”

Section: Introductionmentioning

confidence: 99%

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Sr₂Fe_1.4Mn_0.1Mo_0.5O_6−δ perovskite cathode for highly efficient CO₂ electrolysis

et al. 2019

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Section: Electrochemical Performancesupporting

confidence: 76%

Section: Introductionmentioning

confidence: 99%

Sr₂Fe_1.4Mn_0.1Mo_0.5O_6−δ perovskite cathode for highly efficient CO₂ electrolysis

et al. 2019

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“…Recently, scandium‐doped LST demonstrates improved ionic conductivity and electrocatalytic activity for high‐temperature CO 2 electrolysis, with the current efficiencies improved by 20% . Manganese‐doped LST also displays remarkably enhanced ionic conductivity both in reducing and oxidizing atmospheres, compared with pristine LST . Similarly, doping manganese or chromium into the B‐site of Sr 0.95 Ti 0.9 Nb 0.1 O 3 (STN) can efficiently reduce the electrode polarization by increasing the ionic conductivities of titanates and further improve the current efficiencies of CO 2 electrolysis at high temperatures .…”

Section: Cathode Materialsmentioning

confidence: 99%

High‐Temperature CO₂ Electrolysis in Solid Oxide Electrolysis Cells: Developments, Challenges, and Prospects

et al. 2019

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which has caused serious global warming. According to Intergovernmental Panel on Climate Change, global warming of 1.5 °C above preindustrial levels will come true by 2055 and bring about severe environmental and ecological issues, [2] such as ocean acidification, sea level rise, and species extinction. Therefore, it is urgently needed to reduce the atmospheric CO 2 concentration. [3] Apart from utilizing renewable energy resources to substitute for fossil fuels, CO 2 capture and storage (CCS) processes, and CO 2 capture and utilization (CCU) processes have been developed to effectively diminish the existing atmospheric CO 2 concentration. [4] The CCS processes are often expensive and laborious, and face the risk of CO 2 leakage, while the CCU processes are able to convert the captured CO 2 to value-added carbon-containing chemicals powered by external energy and has attracted more and more research interests recently. However, the conversion of CO 2 to target products is relatively difficult due to its extremely stable CO bonds. Several approaches for CO 2 conversion have been developed, such as photosynthesis, thermocatalytic reduction, electrochemical reduction, and photochemical conversion. Compared with other approaches, electrochemical reduction is more attractive because of two reasons: 1) electrochemical reduction process is controllable through adjusting the applied voltage and reaction temperature, and 2) the process can utilize renewable energy resources such as wind, solar, hydroelectric, and geothermal energies to electrochemically convert CO 2 to useful chemicals, which forms a carbon-neutral energy cycle and simultaneously provides an efficient storage method for renewable energy resources.Several types of electrolysis cell have been systematically investigated for CO 2 electroreduction as listed in Table 1. The first type operates in H-shaped electrochemical cells with liquid electrolyte at low temperatures (<100 °C).[5] Gaseous CO 2 reactant is dissolved into the liquid electrolyte and transported to the electrode surface, which is subsequently electroreduced to CO, HCOOH, CH 4 , C 2 H 4 , C 2 H 5 OH, and so on. [1,6] Although high Faradaic efficiency of products from CO 2 electroreduction has been achieved by exploring efficient catalysts recently, the current density of CO 2 electrolysis is relatively low due to the low CO 2 solubility and the competitive High-temperature CO 2 electrolysis in solid-oxide electrolysis cells (SOECs) could greatly assist in the reduction of CO 2 emissions by electrochemically converting CO 2 to valuable fuels through effective electrothermal activation of the stable CO bond. If powered by renewable energy resources, it could also provide an advanced energy-storage method for their intermittent output. Compared to low-temperature electrochemical CO 2 reduction, CO 2 electrolysis in SOECs at high temperature exhibits higher current density and energy efficiency and has thus attracted much recent attention. The history of its development and its fundamental mech...

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“…However, it is a challenging task to realize efficient reduction of CO 2 by SOEC due to the non-polar nature of CO 2 fuels which are hard to be chemically absorbed and activated in high temperature range (5). The CO product from CO 2 reduction is also demanding for the choice of fuel electrode (i.e.…”

Section: Introductionmentioning

confidence: 99%

Understanding of CO₂ Electrochemical Reduction Reaction Process via High Temperature Solid Oxide Electrolysers

Yue

Irvine

2015

ECS Trans.

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The CO 2 electrochemical reduction via SOEC was studied for a range of cathode materials in various operational conditions. The influences of the fuel gas composition, operating potential and temperature on cathode behavior are discussed and compared on different cathodes. The dissociative adsorption and surface diffusion of active species from CO 2 reduction reaction was found to contribute dominantly to the LSCM-based cathode working in CO 2 -CO mixtures. Efforts were also made to obtain a high performance and durable cathode for high temperature CO 2 electrolyser by employing a gradient LSCM-YSZ cathode and by adopting wet impregnation in cathode preparation. The latter was to more effective in enhancing the cathode electro-catalytic activity. A competitive cathode to Ni-YSZ cermet was fabricated by infiltrating 0.5wt% Pd and GDC into porous LSCM and YSZ layers.

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Remarkable chemical adsorption of manganese-doped titanate for direct carbon dioxide electrolysis

Abstract: Remarkable chemical adsorption of CO2 has been achieved in titanate with significant concentration of oxygen vacancies towards the efficient direct CO2 electrolysis in solid oxide electrolysers.

Cited by 152 publications

References 42 publications

Sr₂Fe_1.4Mn_0.1Mo_0.5O_6−δ perovskite cathode for highly efficient CO₂ electrolysis

Sr₂Fe_1.4Mn_0.1Mo_0.5O_6−δ perovskite cathode for highly efficient CO₂ electrolysis

High‐Temperature CO₂ Electrolysis in Solid Oxide Electrolysis Cells: Developments, Challenges, and Prospects

Understanding of CO₂ Electrochemical Reduction Reaction Process via High Temperature Solid Oxide Electrolysers

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Remarkable chemical adsorption of manganese-doped titanate for direct carbon dioxide electrolysis

Abstract: Remarkable chemical adsorption of CO2 has been achieved in titanate with significant concentration of oxygen vacancies towards the efficient direct CO2 electrolysis in solid oxide electrolysers.

Cited by 152 publications

References 42 publications

Sr2Fe1.4Mn0.1Mo0.5O6−δ perovskite cathode for highly efficient CO2 electrolysis

Sr2Fe1.4Mn0.1Mo0.5O6−δ perovskite cathode for highly efficient CO2 electrolysis

High‐Temperature CO2 Electrolysis in Solid Oxide Electrolysis Cells: Developments, Challenges, and Prospects

Understanding of CO2 Electrochemical Reduction Reaction Process via High Temperature Solid Oxide Electrolysers

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Sr₂Fe_1.4Mn_0.1Mo_0.5O_6−δ perovskite cathode for highly efficient CO₂ electrolysis

Sr₂Fe_1.4Mn_0.1Mo_0.5O_6−δ perovskite cathode for highly efficient CO₂ electrolysis

High‐Temperature CO₂ Electrolysis in Solid Oxide Electrolysis Cells: Developments, Challenges, and Prospects

Understanding of CO₂ Electrochemical Reduction Reaction Process via High Temperature Solid Oxide Electrolysers