Controllable CO<sub>2</sub>conversion in high performance proton conducting solid oxide electrolysis cells and the possible mechanisms

Shi, Nai; Xie, Yun; Huan, Daoming; Yang, Yi; Xue, Shuangshuang; Qi, Zeming; Pan, Yang; Peng, Ranran; Xia, Changrong; Lu, Yalin

doi:10.1039/c8ta12458b

Cited by 41 publications

(33 citation statements)

References 40 publications

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“…Although here we have presented results regarding water electrolysis in the PCEC, similar materials can also be used for carrying out CO 2 electrolysis and related electrochemical reforming processes [59][60][61] . In detail, Ln 2 NiO 4 + δ -based nickelates exhibit excellent CO 2 -tolerance [62][63][64] , while an appropriate stability of the Ba(Ce,Zr)O 3 proton-conducting electrolytes can be achieved by increasing the Zr/Ce ratio [24,26] .…”

Section: Discussionmentioning

confidence: 99%

Towards high-performance tubular-type protonic ceramic electrolysis cells with all-Ni-based functional electrodes

Tarutin

Kasyanova

Lyagaeva

et al. 2020

Journal of Energy Chemistry

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Protonic ceramic electrolysis cells (PCECs), which permit high-temperature electrolysis of water, exhibit various advantages over conventional solid oxide electrolysis cells (SOECs), including cost-effectiveness and the potential to operate at low-/intermediate-temperature ranges with high performance and efficiency. Although many effort s have been made in recent years to improve the electrochemical characteristics of PCECs, certain challenges involved in scaling them up remain unresolved. In the present work, we present a twin approach of combining the tape-calendering method with all-Ni-based functional electrodes with the aim of fabricating a tubular-designed PCEC having an enlarged electrode area (4.6 cm 2 ). This cell, based on a 25 μm-thick BaCe 0.5 Zr 0.3 Dy 0.2 O 3-δ proton-conducting electrolyte, a nickelbased cermet and a Pr 1.95 Ba 0.05 NiO 4 + δ oxygen electrode, demonstrates a high hydrogen production rate (19 mL min -1 at 600 °C), which surpasses the majority of results reported for traditional button-or planar-type PCECs. These findings increase the scope for scaling up solid oxide electrochemical cells and maintaining their operability at reducing temperatures.

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Section: Discussionmentioning

confidence: 99%

Towards high-performance tubular-type protonic ceramic electrolysis cells with all-Ni-based functional electrodes

Tarutin

Kasyanova

Lyagaeva

et al. 2020

Journal of Energy Chemistry

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“…H-SOECs with thin and dense BZY20 thin electrolyte have also been successfully prepared by drop-coating method with 1.0 wt.% NiO as a sintering aid [44] . Shi et al [45] have also as electrolyte material of H-SOECs [46] . However, the application of CaZrO 3 -based oxides as electrolyte materials is hindered by their low proton conductivity at low temperatures.…”

Section: Bazro 3 -Based Materialsmentioning

confidence: 99%

“…It is worth mentioning that to date, the studies concerning H-SOECs are mainly focused on H 2 O electrolysis. However, co-electrolysis of H 2 O and CO 2 can also be conducted in H-SOECs [3,45,73] been investigated in a CO 2 -containing atmosphere and it has been found that when x is larger than 0.2, reaction with CO 2 will take place and BaCO 3 can be detected at above 823 K [74] . Moreover, oxidation of Ni should also be paid attention during co-electrolysis.…”

Section: Co 2 Conversion In the Fuel Electrodementioning

confidence: 99%

Progress Report on Proton Conducting Solid Oxide Electrolysis Cells

Lei

Zhang

Yuan

et al. 2019

Adv Funct Materials

140

114

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The proton-conducting solid oxide electrolysis cell (H-SOEC) is a promising device that converts electrical energy to chemical energy. H-SOECs have been actively studied in the past few years, due to their advantages over oxygen-ion-conducting solid oxide electrolysis cells (O-SOECs), such as lower operation temperature, relatively lower activation energy, and easier gas separation. A critical overview of recent progress in H-SOECs is presented, focusing particularly on the period from 2014-2018. This review focuses on three aspects of H-SOECs, namely the materials, modeling and current leakage in proton conducting oxide electrolytes. Specifically, the current leakage in proton conducting oxides, which is often neglected, leads to two problems in the studies of H-SOECs. One is the distortion of the electrochemical impedance spectra (EIS) and the other is low faradaic efficiency of electrolysis. Based on the comprehensive and critical discussion in these three sections, challenges in the development of H-SOECs are highlighted and prospective research in H-SOECs is outlined.Received: ((will be filled in by the editorial staff))Revised: ((will be filled in by the editorial staff))

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“…There are two CO 2 conversion paths when the gas including CO 2 is supplied into the channels at fuel electrode side. First, CO 2 can participate the co‐electrolysis of H 2 O and CO 2 with proton and electrochemically converted to CO 30. Then, the reverse water‐gas shift reaction (WGSR) will chemically convert CO 2 to CO as following chemical equation:

true {normalCO}_{2} + {normalH}_{2} \leftrightarrow normalCO + {normalH}_{2} normalO

…”

Section: Model Developmentmentioning

confidence: 99%

Three‐dimensional Modeling and Performance Optimization of Proton Conducting Solid Oxide Electrolysis Cell▴

Yao

Zhan

et al. 2020

Fuel Cells

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In this study, a three-dimensional model is developed to study a novel proton conducting solid oxide electrolysis cell (H-SOEC) with porous current collector to alleviate the H 2 Ostarvation problem in oxygen electrode. The comparison between conventional straight-channel structure and the new porous structure is conducted in detail. It is found that the porous current collector can increase the flow uniformity and facilitate the diffusion of H 2 O, which in turn improves the average performance of the H-SOEC. The electrolysis efficiency can be increased by 6.4% compared to straight-channel structure. It is also found that the thermal neutral voltage is decreased when the porous current collector is adopted. Besides, the evaluation of syngas production for CO 2-supplied H-SOEC is performed. Compared to H 2 production, the efficiency of syngas production can be increased by up to 13.5%.

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Controllable CO₂conversion in high performance proton conducting solid oxide electrolysis cells and the possible mechanisms

Abstract: CO2 was successfully converted to valuable products using P-SOECs, and the reaction mechanisms were discussed.

Cited by 41 publications

References 40 publications

Towards high-performance tubular-type protonic ceramic electrolysis cells with all-Ni-based functional electrodes

Towards high-performance tubular-type protonic ceramic electrolysis cells with all-Ni-based functional electrodes

Progress Report on Proton Conducting Solid Oxide Electrolysis Cells

Three‐dimensional Modeling and Performance Optimization of Proton Conducting Solid Oxide Electrolysis Cell▴

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Controllable CO2conversion in high performance proton conducting solid oxide electrolysis cells and the possible mechanisms

Abstract: CO2 was successfully converted to valuable products using P-SOECs, and the reaction mechanisms were discussed.

Cited by 41 publications

References 40 publications

Towards high-performance tubular-type protonic ceramic electrolysis cells with all-Ni-based functional electrodes

Towards high-performance tubular-type protonic ceramic electrolysis cells with all-Ni-based functional electrodes

Progress Report on Proton Conducting Solid Oxide Electrolysis Cells

Three‐dimensional Modeling and Performance Optimization of Proton Conducting Solid Oxide Electrolysis Cell▴

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Product

Resources

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Controllable CO₂conversion in high performance proton conducting solid oxide electrolysis cells and the possible mechanisms