Mo-doped La0·6Sr0·4FeO3-δ as an efficient fuel electrode for direct electrolysis of CO2 in solid oxide electrolysis cells

Wang, Shun; Jiang, Huaguo; Gu, Yu; Yin, Bo; Chen, Sainan; Shen, Muyi; Zheng, Yuan; Ge, Lin; Chen, Han; Guo, Lucun

doi:10.1016/j.electacta.2020.135794

Cited by 42 publications

(33 citation statements)

References 45 publications

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“…The CO 2 electrolysis current density of the obtained (La 0.65 Sr 0.3 Ce 0.05 ) 0.9 (Cr 0.5 Fe 0.5 ) 0.85 Ni 0.15 O 3−δ approached 2.26 A·cm ‑2 at 1.85 V and 850 °C. It was also demonstrated that doping Mo into the B-site of La 0.6 Sr 0.4 FeO 3−δ would result in a performance improvement of approximately 50% compared to that of the non-Mo-doped electrode …”

Section: Introductionmentioning

confidence: 99%

Anion Fluorine-Doped La_0.6Sr_0.4Fe_0.8Ni_0.2O_3−δ Perovskite Cathodes with Enhanced Electrocatalytic Activity for Solid Oxide Electrolysis Cell Direct CO₂ Electrolysis

Yang

Tian

et al. 2022

ACS Sustainable Chem. Eng.

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As a promising and profound device for energy conversion, a solid oxide electrolysis cell (SOEC) can efficiently convert CO2 to CO, realizing chemical storage of renewable energy. However, developing active and stable cathode catalysts for the CO2 reduction reaction (CO2-RR) is critical for SOECs. Herein, to enhance the electrocatalytic performance of a La0.6Sr0.4Fe0.8Ni0.2O3−δ (LSFN) cathode catalyst for CO2-RR, fluorine doping is investigated as anion doping for O-site in the LSFN perovskite lattice. The results confirm that F-doped La0.6Sr0.4Fe0.8Ni0.2O3−δ (LSFNF0.1) has more oxygen vacancies and better CO2 adsorption ability (approaching 4 times than LSFN). The cell with LSFNF0.1 can achieve a maximum electrolysis current density of 1.93 A·cm–2 at 1.8 V at 850 °C, with a R p of 0.275 Ω·cm2 at OCV. Meanwhile, the cell possesses good durability for more than 60 h at an electrolysis current density of 0.6 A·cm–2 without apparent degradation. Mechanistic analysis indicates that F-doping can accelerate the formation of intermediates during electrolysis, indirectly promoting the reaction of the bidentate carbonate (rate-determining step). This work shows that anion-doped LSFNF0.1 is a promising cathode for SOEC direct CO2 electrolysis and provides a potential route for the cathode catalyst development of SOECs.

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Section: Introductionmentioning

confidence: 99%

Anion Fluorine-Doped La_0.6Sr_0.4Fe_0.8Ni_0.2O_3−δ Perovskite Cathodes with Enhanced Electrocatalytic Activity for Solid Oxide Electrolysis Cell Direct CO₂ Electrolysis

Yang

Tian

et al. 2022

ACS Sustainable Chem. Eng.

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“…Simple perovskites (ABO 3 ) are the most commonly investigated nonstoichiometric mixed ionic and electronic conducting oxides for electrochemical CO 2 reduction. ,,− It is well established that the B-site transition-metal cations in these oxides are responsible for the catalytic activity and electron transfer. − B-site cations are highly hybridized with the surrounding oxygen anions in BO 6 octahedra . Due to B-site hybridization with lattice oxygen, oxygen vacancies interact with the B-site to promote the adsorption and activation of CO 2 on the surface.…”

Section: Co2 Reduction On Nonstoichiometric Mixed Ionic and Electroni...mentioning

confidence: 99%

“…To tune the performance of Fe-based perovskites, doping the A- and the B-sites with various cations has been used as a strategy. ,,,− Mizusaki et al showed that doping the La site with Sr in LaFeO 3 improved the electrochemical rates. This was associated with Sr increasing electron–hole concentration and straightening of the O–B–O bond, leading to improved orbital overlapping between the 3 d orbital of the B-site and O 2 p orbital, enhancing both ionic and electronic conductivity.…”

Section: Co2 Reduction On Nonstoichiometric Mixed Ionic and Electroni...mentioning

confidence: 99%

Electrochemical Reduction of CO₂ using Solid Oxide Electrolysis Cells: Insights into Catalysis by Nonstoichiometric Mixed Metal Oxides

et al. 2022

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Selective electrochemical reduction of CO2 using renewable energy sources to create platform molecules for synthesis of fuels and chemicals has become a contemporary research area of interest because of its potential for recycling and minimizing the adverse environmental impacts of CO2. Solid oxide electrolysis cells (SOECs) are solid-state electrochemical devices with significant potential in this area because of their ability to efficiently and selectively convert CO2 to CO or, when coupled with water electrolysis, to produce syngas (CO and H2). Both CO and syngas are precursors for the synthesis of fuels and chemicals using existing technologies. While promising, SOECs are limited by the instability of the state-of-the-art cathode electrocatalyst, Ni/yttria-stabilized zirconia (YSZ) cermet, due to its limited redox properties and deactivation by carbon deposits. Nonstoichiometric mixed ionic and electronic conducting oxides are promising alternatives because of their redox stability and resistance to deactivation by carbon. Herein, we summarize the literature in this area and derive trends that relate changes in composition and oxygen defects in these oxides to activity, selectivity, and stability for the electrochemical reduction of CO2 to CO in SOECs using both experimental and theoretical studies. We also evaluate the factors that present challenges in a direct comparison of the performance of SOEC cathode electrocatalysts for CO2 reduction reported in the literature and suggest possible solutions and standardized protocols for benchmarking the performance of SOECs. We conclude by summarizing and providing an overview of challenges in the field along with potential solutions and opportunities for electrochemical reduction of CO2 by nonstoichiometric mixed metal oxides in SOECs.

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“…For the RSCC, in addition to the excellent activity of the above two reactions, the semiconductor material also needs to have a good catalytic activity for the water electrolysis reaction. Previous studies found that perovskite oxides, such as La 0.6 Sr 0.4 FeO 3 and Sr 2 Fe 1.5 Mo 0.5 O 6 , are not only good electrode materials for the SOFC but also exhibit excellent electrolysis performance in the SOEC. , In addition, Ruddlesden–Popper (R-P) structure oxides, such as La 2 NiO 4 and Pr 2 NiO 4 , are considered as good mixed ionic electronic conductor (MIEC) materials. , The ideal R-P structure is usually formed by alternately stacking rock salt-type layers and perovskite-type layers. Most compounds with an R-P structure can accommodate a large amount of interstitial oxygen or generate a large amount of oxygen vacancies and are considered to be good SOFC cathode materials. , In addition, it has been reported that the R-P structure oxide La 0.6 Sr 1.4 MnO 4 shows good phase stability of the structure in a H 2 atmosphere and exhibits outstanding and stable electrochemical activity .…”

Section: Introductionmentioning

confidence: 99%

The Performance of Ruddlesden–Popper (R-P) Structured Pr_2–xSr_xNi_0.2Mn_0.8O₄ for Reversible Single-Component Cells

Ping

Dong

Wang

et al. 2021

ACS Sustainable Chem. Eng.

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In view of high catalytic activity and oxygen vacancy concentration, Ruddlesden−Popper (R-P) structure oxide has been widely used as the electrode material for solid oxide fuel cells (SOFCs). Herein, three R-P structure oxides, Pr 2−x Sr x Ni 0.2 Mn 0.8 O 4 (x = 1, 1.2, and 1.5), are used as the semiconductor materials of single-component cells. The materials for the oxygen side are hybrid oxides consisting of R-P structure oxide and perovskite oxide. The hydrogen side was exposed to the reduction atmosphere before the test, and the perovskite structure disappeared and the lattice parameters of the R-P structure changed, resulting in the formation of a new R-P structure and MnO 2 or NiMn alloy. In addition, Pr 0.5 Sr 1.5 Ni 0.2 Mn 0.8 O 4 and reduced Pr 0.5 Sr 1.5 Ni 0.2 Mn 0.8 O 4 exhibit the most content of oxygen vacancy. For a single-component fuel cell (SCFC), the cell performance increased with the decrease in Pr content. The SCFC composed of Pr 0.5 Sr 1.5 Ni 0.2 Mn 0.8 O 4 shows the highest maximum power densities (P max ), which reached 206.6 mW cm −2 at 700 °C. It is because the reduced Pr 0.5 Sr 1.5 Ni 0.2 Mn 0.8 O 4 has the highest catalytic activity for hydrogen oxidation reaction (HOR). Furthermore, the P max at 700 °C can reach a value of 198.1 mW cm −2 in SOFC mode, and in the case of SOEC mode, the current density at 700 °C is as high as −390.8 mA cm −2 with an applied electrolysis voltage of 1.3 V for the reversible single-component cell (RSCC) with Pr 0.5 Sr 1.5 Ni 0.2 Mn 0.8 O 4 as the semiconducting electrocatalyst.

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Mo-doped La0·6Sr0·4FeO3-δ as an efficient fuel electrode for direct electrolysis of CO2 in solid oxide electrolysis cells

Cited by 42 publications

References 45 publications

Anion Fluorine-Doped La_0.6Sr_0.4Fe_0.8Ni_0.2O_3−δ Perovskite Cathodes with Enhanced Electrocatalytic Activity for Solid Oxide Electrolysis Cell Direct CO₂ Electrolysis

Anion Fluorine-Doped La_0.6Sr_0.4Fe_0.8Ni_0.2O_3−δ Perovskite Cathodes with Enhanced Electrocatalytic Activity for Solid Oxide Electrolysis Cell Direct CO₂ Electrolysis

Electrochemical Reduction of CO₂ using Solid Oxide Electrolysis Cells: Insights into Catalysis by Nonstoichiometric Mixed Metal Oxides

The Performance of Ruddlesden–Popper (R-P) Structured Pr_2–xSr_xNi_0.2Mn_0.8O₄ for Reversible Single-Component Cells

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Mo-doped La0·6Sr0·4FeO3-δ as an efficient fuel electrode for direct electrolysis of CO2 in solid oxide electrolysis cells

Cited by 42 publications

References 45 publications

Anion Fluorine-Doped La0.6Sr0.4Fe0.8Ni0.2O3−δ Perovskite Cathodes with Enhanced Electrocatalytic Activity for Solid Oxide Electrolysis Cell Direct CO2 Electrolysis

Anion Fluorine-Doped La0.6Sr0.4Fe0.8Ni0.2O3−δ Perovskite Cathodes with Enhanced Electrocatalytic Activity for Solid Oxide Electrolysis Cell Direct CO2 Electrolysis

Electrochemical Reduction of CO2 using Solid Oxide Electrolysis Cells: Insights into Catalysis by Nonstoichiometric Mixed Metal Oxides

The Performance of Ruddlesden–Popper (R-P) Structured Pr2–xSrxNi0.2Mn0.8O4 for Reversible Single-Component Cells

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About

Anion Fluorine-Doped La_0.6Sr_0.4Fe_0.8Ni_0.2O_3−δ Perovskite Cathodes with Enhanced Electrocatalytic Activity for Solid Oxide Electrolysis Cell Direct CO₂ Electrolysis

Anion Fluorine-Doped La_0.6Sr_0.4Fe_0.8Ni_0.2O_3−δ Perovskite Cathodes with Enhanced Electrocatalytic Activity for Solid Oxide Electrolysis Cell Direct CO₂ Electrolysis

Electrochemical Reduction of CO₂ using Solid Oxide Electrolysis Cells: Insights into Catalysis by Nonstoichiometric Mixed Metal Oxides

The Performance of Ruddlesden–Popper (R-P) Structured Pr_2–xSr_xNi_0.2Mn_0.8O₄ for Reversible Single-Component Cells