Infiltration of Ce0.8Gd0.2O1.9 nanoparticles on Sr2Fe1.5Mo0.5O6- cathode for CO2 electroreduction in solid oxide electrolysis cell

Lv, Houfu; Zhou, Yingjie; Zhang, Xiaomin; Song, Yibing; Liu, Qingxue; Wang, Qianqian; Bao, Xinhe

doi:10.1016/j.jechem.2018.11.002

Cited by 110 publications

(42 citation statements)

References 37 publications

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“…In addition, the incorporation of La 0.3 Sr 0.7 Ti 0.3 Fe 0.7 O 3‐ δ cathode with CeO 2 nanoparticles leads to the current density at 2.0 V increasing from 1.07 to 3.56 A cm −2 and the R p decreasing from 0.82 to 0.13 Ω cm 2 when the temperature rises from 750 to 850 °C . After loading GDC nanoparticles onto the Sr 2 Fe 1.5 Mo 0.5 O 6‐ δ scaffold, the current density for CO 2 electrolysis increases from 0.283 to 0.446 A cm −2 at 1.6 V and 800 °C . Generally, the enhanced electrochemical performance originates from the increased surface oxygen vacancies and active TPBs after infiltrating active nanoparticles on the cathode, which not only boosts the electronic conductivity but also reduces the polarization resistance by accelerating the CO 2 adsorption and dissociation processes.…”

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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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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“…As clearly shown in Figure 3b, the electrolysis current density of 0.71 A cm −2 for PSFM cathode is much higher than 0.05 A cm −2 for La 0.2 Sr 0.8 TiO 3− δ (LST) cathode, [ 15 ] 0.15 A cm −2 for La 0.2 Sr 0.8 Ti 0.9 Mn 0.1 O 3+ δ (LSTM) cathode, [6e] 0.10 A cm −2 for La 0.75 Sr 0.25 Cr 0.5 Mn 0.5 O 3– δ (LSCrM) cathode, [4c] 0.28 A cm −2 for La 0.3 Sr 0.7 Fe 0.7 Ti 0.3 O 3 (LSFT) cathode, [4e] and 0.14 A cm −2 for (Pr,Ba) 2 Mn 2 O 5+δ (LPBM) cathode [10d] . It is also found that PSFM cathode exhibits a much better electrochemical performance than some SFM‐based cathode, such as 0.22 A cm −2 for SFM cathode, [ 16 ] 0.38 A cm −2 for SFM‐SDC composite cathode, [8a] and 0.45 A cm −2 for GDC‐infiltrated SFM cathode. [ 16 ] More importantly, the performance is better than some in situ exsolved metallic Fe nanoparticles–structured ceramic electrodes, for example, 0.53 A cm −2 for Fe@(Pr,Ba) 2 Mn 2– y Fe y O 5+ δ (LPBMF) cathode [10d] and 0.43 A cm −2 for Fe@SFM cathode [10g] .…”

Section: Figurementioning

confidence: 99%

“…It is also found that PSFM cathode exhibits a much better electrochemical performance than some SFM‐based cathode, such as 0.22 A cm −2 for SFM cathode, [ 16 ] 0.38 A cm −2 for SFM‐SDC composite cathode, [8a] and 0.45 A cm −2 for GDC‐infiltrated SFM cathode. [ 16 ] More importantly, the performance is better than some in situ exsolved metallic Fe nanoparticles–structured ceramic electrodes, for example, 0.53 A cm −2 for Fe@(Pr,Ba) 2 Mn 2– y Fe y O 5+ δ (LPBMF) cathode [10d] and 0.43 A cm −2 for Fe@SFM cathode [10g] . These results demonstrate that PSFM cathode exhibits remarkably electrocatalytic activity for CO 2 RR via a SOEC.…”

Section: Figurementioning

confidence: 99%

“…As shown in Figure 3e, four characteristic peaks indexed as P1–P4 can be observed in the frequency range from 10 −2 to 10 5 Hz, indicating that the whole CO 2 RR in the solid oxide electrolyzer with the PSFM cathode can be divided into four individual substeps. According to the literature previously reported, [5c,16,18] P4–P1 substeps are assigned to the charge transfer and oxygen ion (O 2− ) transport in the electrodes and the electrolyte (P4), the evolution of O 2− to O 2 at the anode (P3), the dissociation of carbonate intermediate species (P2), and CO 2 adsorption, dissociation ionization, and surface diffusion to three phase boundaries (TPBs) occurred at the cathode as well as at the electrode/electrolyte interfacial (P1), respectively. The proportions and the simulated resistance corresponding to each fitted peak shown in Figure 3e are given in Figure 3g,h.…”

Section: Figurementioning

confidence: 99%

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Pr and Mo Co‐Doped SrFeO_3–δ as an Efficient Cathode for Pure CO₂ Reduction Reaction in a Solid Oxide Electrolysis Cell

Zhang

Zhao

et al. 2020

Energy Tech

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Carbon dioxide (CO 2) electrolysis via a solid oxide electrolysis cell (SOEC), simplified as CO 2 RR, is a significantly promising energy conversion technology, which can effectively convert greenhouse gas CO 2 to value-added chemical agent carbon monoxide (CO) by using renewable electricity with high efficiency. [1] A SOEC is usually consisted of an ion conducting electrolyte, an anode for O 2 generation, and a cathode for CO 2 electroreduction. [1a,1b] To make the technology available for commercial application, it is necessary to simultaneously enhance the electrocatalytic activity and stability of the cathode during the operation. The state-of-the-art Ni-based cathodes exhibit excellent electrochemical performance, [2] but suffer from performance degradation due to the aggregation and oxidation of Ni particles as well as carbon deposition at the elevated temperature. [3] Therefore, it is highly in need to develop alternative cathode materials with high electrocatalytic activity and good long-term stability for CO 2 RR application. In recent years, mixed ionic-electronic conducting (MIEC) perovskite oxides, such as strontium titanate (SrTiO 3)-based oxides and lanthanum chromate (LaCrO 3)-based oxides, have been explored as the potential cathode materials because these cathode materials have demonstrated excellent stability at the elevated temperature for directly electrolyzing CO 2 to CO without the addition of any safe gas (usually H 2 , CO, or H 2-CO mixture). [4] However, their performance is still insufficient for practical CO 2 RR application. Therefore, further modification still needs to be done to efficiently enhance the cathode performance to enable direct CO 2 electrolysis. It is well known that CO 2 is difficult to be directly reduced to CO because of its extremely high energy barrier for directly breaking C═O bond (%1.9 eV), and sufficient CO 2 adsorption and activation is an important prerequisite for direct CO 2 electroreduction via a SOEC. [5] Previous studies have revealed that the introduction of oxygen vacancies at the cathode surface could not only effectively accelerate the CO 2 chemical adsorption, but also significantly reduce the energy barrier of CO 2 dissociation, possibly facilitating the direct CO 2 RR. [6] Metallic nanoparticles have been commonly introduced into the perovskite oxide cathodes to effectively alter the electrocatalytic properties of the cathodes, and to significantly increase the concentration of oxygen vacancies, resulting in a remarkable improvement of CO 2 adsorption and activation. [4d,5b,7] Therefore, it is highly expected to construct metallic nanoparticles-decorated perovskite oxide cathodes for efficient CO 2 RR. Recently, metallic nanoparticles-structured perovskite oxide cathodes have been effectively generated in one step by the in situ exsolution method. [8] It is demonstrated that these in situ exsolved metallic nanoparticles can strongly facilitate CO 2 adsorption and C═O bond activation, reasonably

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“…Recently, solid oxide electrolysis cells (SOECs) have caught extensive attention of researchers since SOECs are a kind of highly efficient power conversion device [1][2][3][4][5] . CO 2 electroreduction using renewable energy in SOECs is considered as a promising technology for carbon neutrality [6][7][8][9][10] . A SOEC consists of a cathode, an electrolyte and an anode.…”

Section: Introductionmentioning

confidence: 99%

Detrimental phase evolution triggered by Ni in perovskite-type cathodes for CO2 electroreduction

Zhang

Liu

et al. 2019

Journal of Energy Chemistry

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Infiltration of Ce0.8Gd0.2O1.9 nanoparticles on Sr2Fe1.5Mo0.5O6- cathode for CO2 electroreduction in solid oxide electrolysis cell

Cited by 110 publications

References 37 publications

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

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

Pr and Mo Co‐Doped SrFeO_3–δ as an Efficient Cathode for Pure CO₂ Reduction Reaction in a Solid Oxide Electrolysis Cell

Detrimental phase evolution triggered by Ni in perovskite-type cathodes for CO2 electroreduction

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Infiltration of Ce0.8Gd0.2O1.9 nanoparticles on Sr2Fe1.5Mo0.5O6- cathode for CO2 electroreduction in solid oxide electrolysis cell

Cited by 110 publications

References 37 publications

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

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

Pr and Mo Co‐Doped SrFeO3–δ as an Efficient Cathode for Pure CO2 Reduction Reaction in a Solid Oxide Electrolysis Cell

Detrimental phase evolution triggered by Ni in perovskite-type cathodes for CO2 electroreduction

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Product

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About

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

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

Pr and Mo Co‐Doped SrFeO_3–δ as an Efficient Cathode for Pure CO₂ Reduction Reaction in a Solid Oxide Electrolysis Cell