Article(id=1319726372608655842, tenantId=1146029695717560320, journalId=1263187385517883426, issueId=1319726331013742638, articleNumber=null, orderNo=null, doi=10.14062/j.issn.0454-5648.20240759, pmid=null, cstr=null, oa=null, hot=null, price=null, onlineType=0, articleFormat=0, articleType=null, articleTypeStr=null, receivedDate=1732809600000, receivedDateStr=2024-11-29, revisedDate=1750953600000, revisedDateStr=2025-06-27, acceptedDate=null, acceptedDateStr=null, onlineDate=1792576886560, onlineDateStr=2026-10-21, pubDate=1760889600000, pubDateStr=2025-10-20, doiRegisterDate=null, doiRegisterDateStr=null, onlineIssueDate=1792576886560, onlineIssueDateStr=2026-10-21, onlineJustAcceptDate=null, onlineJustAcceptDateStr=null, onlineFirstDate=null, onlineFirstDateStr=null, sourceXml=null, magXml=null, createTime=1792576886560, creator=13701087609, updateTime=1792576886560, updator=13701087609, issue=Issue{id=1319726331013742638, tenantId=1146029695717560320, journalId=1263187385517883426, year='2025', volume='53', issue='10', pageStart='2753', pageEnd='3078', issueExtLink='null', onlineDate='null', pubDate='1760889600000', pubDateStr='2025-10-20', beforeIssueId=null, nextIssueId=null, price=null, status=1, issueComplete=1, articleOrder=1, issueType=-1, specialIssue=null, createTime=1792576876643, creator='13701087609', updateTime=1792577470184, updator='13701087609', preIssue=null, nextIssue=null, articleTotal=null, ext={EN=IssueExt(id=1319728820630962433, tenantId=1146029695717560320, journalId=1263187385517883426, issueId=1319726331013742638, language=EN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=), CN=IssueExt(id=1319728820635156738, tenantId=1146029695717560320, journalId=1263187385517883426, issueId=1319726331013742638, language=CN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=)}, issueFiles=null, downloadFileDto=null}, startPage=2941, endPage=2951, ext={EN=ArticleExt(id=1319726372801593827, articleId=1319726372608655842, tenantId=1146029695717560320, journalId=1263187385517883426, language=EN, title=Efficient CO2 Electrolysis Based on a Cu Nanoparticle-Layered Perovskite Heterojunction Fuel Electrode, columnId=1321945034530861166, journalTitle=Journal of the Chinese Ceramic Society, columnName=Special Issue on Surface and Interface of Solid Oxide Cell—Research Article, runingTitle=null, highlight=null, articleAbstract=
Introduction

Solid oxide electrolysis cells (SOECs) as a highly efficient energy conversion technology exhibit an immense potential in converting CO2 into valuable chemicals during the electrolysis process, thereby providing an effective pathway to achieve carbon neutrality goals. However, the inadequate catalytic performance of conventional Ni-YSZ fuel electrode is a pivotal constraint hindering the advancement of SOEC technology. Lanthanum-strontium titanate (LST) perovskite oxides have a superior mixed ionic-electronic conductivity (MEIC) under cathodic polarization, making them a promising alternative fuel electrode for the SOECs. However, the performance of LST in CO2 reduction reactions (CO2RR) remains inadequate. In this work, Cu nanoparticles-decorated (La4Sr4)0.9Ti8-xCuxO26 (LSTCux, with x=0.4, 0.8, 1.2, and 1.6) layered perovskite oxides as a novel fuel electrode were synthesized by a conventional solid-phase reaction method.

Methods

For the synthesis of (La4Sr4)0.9Ti8-xCuxO26 (LSTCux, x = 0.4, 0.8, 1.2, 1.6), La2O3, SrCO3, TiO2, and CuO as raw materials were weighed, ground for 2 h, and calcinated at 1400 ℃ for 10 h. Subsequently, the samples were reduced in H2 atmosphere at 800 ℃ for 10 h, yielding the reduced samples of LSTCu-rx. A solid electrolyte-supported structure was adopted with commercial SSZ electrolyte disks. To prevent reactions, the GDC slurry was spin-coated on the both sides of the SSZ disks and sintered at 1400 ℃ for 3 h to obtain a dense GDC functional layer. LSTCu-rx and LSCF powders were mixed with organic binders to prepare electrode slurries, which were then coated on the both sides of the electrolyte disk and sintered at 900 ℃ for 3 h, resulting in LSTCu-rx|GDC|SSZ|GDC|LSCF structured SOEC button cell. Silver paste and silver wires were applied on the both sides of the cell as current collectors.

The phase compositions of LSTCux and LSTCu-rx were characterized by X-ray diffraction (XRD). The morphology was determined by field emission scanning electron microscopy (FESEM) and transmission electron microscopy (TEM) with energy dispersive spectroscopy (EDS). The elemental valence states were determined by X-ray photoelectron spectroscopy (XPS). The electrochemical performance was analyzed by Solartron equipment. CO2 electrolysis tests were performed on the SOEC button cells via the measurement of j-V curves and electrochemical impedance spectroscopy (EIS).

Results and discussion

The results indicate that the electrode exhibits superior electrochemical activity and stability in CO2 Reduction Reactions (CO2RR). The results of electrochemical performance tests reveal that at 850 ℃ and 2.0 V, the SOECs utilizing LSTCu-r0.4, LSTCu-r0.8, LSTCu-r1.2, and LSTCu-r1.6 as electrodes have current densities of 1.07, 2.01, 1.65, and 1.52 A/cm2, respectively. Among them, LSTCu-r0.8 has the maximum current density with polarization resistance (Rp) and Ohmic resistance (RΩ) of 0.12 and 0.05 Ω·cm2, respectively. These results indicate that LSTCu-r0.8 possesses superior electrocatalytic activity and efficient electron transport.

Conclusions

The LSTCu-rx series of fuel electrodes exhibited superior electrochemical performance and catalytic activity, particularly in the field of CO2 electrolysis. Among them, LSTCu-r0.8 could be used as a promising material for CO2 electrolysis fuel electrodes due to its efficient CO2 adsorption and conversion capabilities, excellent electron transport properties, and stable electrochemical performance. In the future, the further optimization of the preparation process and exploration of a wider range of reaction conditions could be conducted to achieve a more efficient and stable CO2 electrolysis process.

, authors=Zhengrong LIU, Jiaxi NIU, Jingze LIU, Shuo WU, Kai WU, Jun ZHOU, authorsList=Zhengrong LIU, Jiaxi NIU, Jingze LIU, Shuo WU, Kai WU, Jun ZHOU, authorCompany=null, correspAuthors=Jun ZHOU, authorNote=

LIU Zhengrong (1998-), male, Doctoral candidate. E-mail:

, correspAuthorsNote=
ZHOU Jun (1985-), male, Ph.D., Associate Professor. E-mail:
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固体氧化物电解电池(SOEC)作为一种高效能量转换技术,在电解过程中展现出将CO2转化为有用化学品的巨大潜力,为实现碳中和目标提供了有效路径。然而,传统燃料电极Ni-氧化钇稳定氧化锆的催化性能不足一直是制约SOEC技术发展的关键因素。针对这一挑战,制备了原位生长Cu纳米颗粒修饰的(La4Sr4)0.9Ti8-xCuxO26(LSTCux,x=0.4,0.8,1.2和1.6)层状钙钛矿氧化物,并将其作为SOEC装置的新型燃料电极。Cu纳米颗粒与层状钙钛矿氧化物形成的异质结结构显著增强了CO2还原反应(CO2RR)的催化活性。结果表明:采用LSTCu-rx作为燃料电极的SOEC纽扣电池,在2.0 V、850 ℃和纯CO2电解条件下,获得了2.01 A·cm-2的电流密度,其极化阻抗和欧姆阻抗分别为0.12 Ω·cm2和0.05 Ω·cm2,表现出了优异的CO2电解性能。

, authors=刘峥嵘, 牛佳希, 刘敬泽, 武硕, 吴锴, 周峻, authorsList=刘峥嵘, 牛佳希, 刘敬泽, 武硕, 吴锴, 周峻, authorCompany=null, correspAuthors=周峻, authorNote=

刘峥嵘(1998—),男,博士研究生。

, correspAuthorsNote=
周峻(1985—),男,博士,副教授。
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基于铜纳米颗粒-层状钙钛矿异质结燃料极的高效CO2电解
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刘峥嵘 , 牛佳希 , 刘敬泽 , 武硕 , 吴锴 , 周峻
硅酸盐学报 | 固体氧化物电池表界面专题—研究论文 2025,53(10): 2941-2951
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硅酸盐学报 |固体氧化物电池表界面专题—研究论文 2025 , 53 (10) : 2941 -2951
基于铜纳米颗粒-层状钙钛矿异质结燃料极的高效CO2电解
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刘峥嵘 , 牛佳希, 刘敬泽, 武硕, 吴锴, 周峻
作者信息
  • 西安交通大学电气工程学院,新型储能与能量转换纳米材料研究中心,西安 710049
通讯作者:
周峻(1985—),男,博士,副教授。
作者简介:

刘峥嵘(1998—),男,博士研究生。

Efficient CO2 Electrolysis Based on a Cu Nanoparticle-Layered Perovskite Heterojunction Fuel Electrode
Zhengrong LIU , Jiaxi NIU, Jingze LIU, Shuo WU, Kai WU, Jun ZHOU
Affiliations
  • Center of Nanomaterials for Renewable Energy, School of Electric Engineering, Xi'an Jiaotong University, Xi'an 710049, China
  • Corresponding Author:
    ZHOU Jun (1985-), male, Ph.D., Associate Professor. E-mail:

    LIU Zhengrong (1998-), male, Doctoral candidate. E-mail:

出版时间: 2025-10-20 doi: 10.14062/j.issn.0454-5648.20240759
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固体氧化物电解电池(SOEC)作为一种高效能量转换技术,在电解过程中展现出将CO2转化为有用化学品的巨大潜力,为实现碳中和目标提供了有效路径。然而,传统燃料电极Ni-氧化钇稳定氧化锆的催化性能不足一直是制约SOEC技术发展的关键因素。针对这一挑战,制备了原位生长Cu纳米颗粒修饰的(La4Sr4)0.9Ti8-xCuxO26(LSTCux,x=0.4,0.8,1.2和1.6)层状钙钛矿氧化物,并将其作为SOEC装置的新型燃料电极。Cu纳米颗粒与层状钙钛矿氧化物形成的异质结结构显著增强了CO2还原反应(CO2RR)的催化活性。结果表明:采用LSTCu-rx作为燃料电极的SOEC纽扣电池,在2.0 V、850 ℃和纯CO2电解条件下,获得了2.01 A·cm-2的电流密度,其极化阻抗和欧姆阻抗分别为0.12 Ω·cm2和0.05 Ω·cm2,表现出了优异的CO2电解性能。

层状钙钛矿氧化物  /  原位生长  /  固体氧化物电解电池  /  钛酸盐  /  二氧化碳转化
Introduction

Solid oxide electrolysis cells (SOECs) as a highly efficient energy conversion technology exhibit an immense potential in converting CO2 into valuable chemicals during the electrolysis process, thereby providing an effective pathway to achieve carbon neutrality goals. However, the inadequate catalytic performance of conventional Ni-YSZ fuel electrode is a pivotal constraint hindering the advancement of SOEC technology. Lanthanum-strontium titanate (LST) perovskite oxides have a superior mixed ionic-electronic conductivity (MEIC) under cathodic polarization, making them a promising alternative fuel electrode for the SOECs. However, the performance of LST in CO2 reduction reactions (CO2RR) remains inadequate. In this work, Cu nanoparticles-decorated (La4Sr4)0.9Ti8-xCuxO26 (LSTCux, with x=0.4, 0.8, 1.2, and 1.6) layered perovskite oxides as a novel fuel electrode were synthesized by a conventional solid-phase reaction method.

Methods

For the synthesis of (La4Sr4)0.9Ti8-xCuxO26 (LSTCux, x = 0.4, 0.8, 1.2, 1.6), La2O3, SrCO3, TiO2, and CuO as raw materials were weighed, ground for 2 h, and calcinated at 1400 ℃ for 10 h. Subsequently, the samples were reduced in H2 atmosphere at 800 ℃ for 10 h, yielding the reduced samples of LSTCu-rx. A solid electrolyte-supported structure was adopted with commercial SSZ electrolyte disks. To prevent reactions, the GDC slurry was spin-coated on the both sides of the SSZ disks and sintered at 1400 ℃ for 3 h to obtain a dense GDC functional layer. LSTCu-rx and LSCF powders were mixed with organic binders to prepare electrode slurries, which were then coated on the both sides of the electrolyte disk and sintered at 900 ℃ for 3 h, resulting in LSTCu-rx|GDC|SSZ|GDC|LSCF structured SOEC button cell. Silver paste and silver wires were applied on the both sides of the cell as current collectors.

The phase compositions of LSTCux and LSTCu-rx were characterized by X-ray diffraction (XRD). The morphology was determined by field emission scanning electron microscopy (FESEM) and transmission electron microscopy (TEM) with energy dispersive spectroscopy (EDS). The elemental valence states were determined by X-ray photoelectron spectroscopy (XPS). The electrochemical performance was analyzed by Solartron equipment. CO2 electrolysis tests were performed on the SOEC button cells via the measurement of j-V curves and electrochemical impedance spectroscopy (EIS).

Results and discussion

The results indicate that the electrode exhibits superior electrochemical activity and stability in CO2 Reduction Reactions (CO2RR). The results of electrochemical performance tests reveal that at 850 ℃ and 2.0 V, the SOECs utilizing LSTCu-r0.4, LSTCu-r0.8, LSTCu-r1.2, and LSTCu-r1.6 as electrodes have current densities of 1.07, 2.01, 1.65, and 1.52 A/cm2, respectively. Among them, LSTCu-r0.8 has the maximum current density with polarization resistance (Rp) and Ohmic resistance (RΩ) of 0.12 and 0.05 Ω·cm2, respectively. These results indicate that LSTCu-r0.8 possesses superior electrocatalytic activity and efficient electron transport.

Conclusions

The LSTCu-rx series of fuel electrodes exhibited superior electrochemical performance and catalytic activity, particularly in the field of CO2 electrolysis. Among them, LSTCu-r0.8 could be used as a promising material for CO2 electrolysis fuel electrodes due to its efficient CO2 adsorption and conversion capabilities, excellent electron transport properties, and stable electrochemical performance. In the future, the further optimization of the preparation process and exploration of a wider range of reaction conditions could be conducted to achieve a more efficient and stable CO2 electrolysis process.

layered perovskite oxide  /  in-situ growth  /  solid oxide electrolysis cell  /  titanate  /  carbon dioxide conversion
刘峥嵘, 牛佳希, 刘敬泽, 武硕, 吴锴, 周峻. 基于铜纳米颗粒-层状钙钛矿异质结燃料极的高效CO2电解. 硅酸盐学报, 2025 , 53 (10) : 2941 -2951 . DOI: 10.14062/j.issn.0454-5648.20240759
Zhengrong LIU, Jiaxi NIU, Jingze LIU, Shuo WU, Kai WU, Jun ZHOU. Efficient CO2 Electrolysis Based on a Cu Nanoparticle-Layered Perovskite Heterojunction Fuel Electrode[J]. Journal of the Chinese Ceramic Society, 2025 , 53 (10) : 2941 -2951 . DOI: 10.14062/j.issn.0454-5648.20240759
  • 国家自然基金资助项目(52377212)
  • 电工材料电气绝缘全国重点实验室项目(EIPE22314; EIPE22306)
  • 西安交通大学自由探索与创新-学生类项目(xzy022023098)
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doi: 10.14062/j.issn.0454-5648.20240759
  • 接收时间:2024-11-29
  • 首发时间:2026-10-21
  • 出版时间:2025-10-20
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  • 收稿日期:2024-11-29
  • 修回日期:2025-06-27
基金
国家自然基金资助项目(52377212)
电工材料电气绝缘全国重点实验室项目(EIPE22314; EIPE22306)
西安交通大学自由探索与创新-学生类项目(xzy022023098)
作者信息
    西安交通大学电气工程学院,新型储能与能量转换纳米材料研究中心,西安 710049

通讯作者:

周峻(1985—),男,博士,副教授。
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