Article
Chemistry, Multidisciplinary
Matthias Riegraf, Diana M. Amaya-Duenas, Noriko Sata, K. Andreas Friedrich, Remi Costa
Summary: The study found that Ni-doped chromite anodes show promising performance at high temperatures, especially with increased electrode thickness leading to enhanced performance and stability. However, sulfur poisoning and increasing current density can degrade performance, requiring redox cycling for reversal.
Article
Chemistry, Physical
Mingxia Qin, Yu Xiao, Hongyu Yang, Ting Tan, Ziming Wang, Xinming Fan, Chenghao Yang
Summary: The Ru/Nb co-doped cubic perovskite oxide PSFRN was partially transformed into RP-PSFRN and exsolved Fe0.7Ru0.3 alloy-FeOx oxide core-shell nanoparticles on the substrate surface after treatment in wet H-2. The modified R-PSFRN anode material demonstrated high catalytic activity for hydrogen and hydrocarbon fuels, achieving a power density of 0.683 and 0.537 W cm(-2) with wet H-2 and C3H8 as fuel at 800 degrees C. The SOFC showed stable output under a constant current load of 0.15 A cm(-2) in C3H8, indicating high resistance to carbon deposition and coking.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2021)
Article
Energy & Fuels
Lijie Zhang, Yihang Li, Binze Zhang, Yanhong Wan, Zheqiang Xu, Shaowei Zhang, Tenglong Zhu, Changrong Xia
Summary: This study developed a high performance fuel electrode material by utilizing in-situ metal exsolution to form FeNi3 nanoparticles, which improved the electrochemical performance of RSOC and demonstrated stable performance through operation tests.
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
(2021)
Article
Chemistry, Physical
Xiuying Tian, Lejia Guo, Jin Wen, Ling Zhu, Changyan Ji, Zhi Huang, Huating Qiu, Fei Luo, Xin Liu, Jing Li, Chunyan Li, Yangxi Peng, Jianhui Cao, Zhiyuan He, Hongbin Zhong
Summary: SrMoO4: Sm3+ phosphors with orange red-emitting properties were synthesized using a solid-phase method for temperature measurement applications. The phosphors had a scheelite structure belonging to the tetragonal system and I41/a space group. Sm3+ ions were successfully incorporated into the SrMoO4 lattice. The phosphors exhibited irregular microparticles with well-crystallized pomegranate seed-like morphology, and Sm3+ ions were evenly distributed in the SrMoO4 matrix. The appropriate quenching concentration of Sm3+ was found to be 1.0%, and the phosphors showed excellent thermal stability and anti-thermal quenching properties. A new dual-model thermometry strategy based on exponential function and modified Boltzmann population distribution was proposed, and the phosphors demonstrated absolute sensitivities of 0.108 K-1 and relative sensitivities of 0.601% K-1. The findings highlight the potential applications of SrMoO4: Sm3+ phosphors in pc-WLEDs and optical thermometry.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Chemistry, Physical
Alessandro Donazzi, Travis A. Schmauss, Scott A. Barnett
Summary: Direct utilization of alcohols in Solid Oxide Fuel Cells (SOFCs) can improve conversion efficiency by using excess heat for internal reforming and simplify the system balance of plant. Perovskite oxide anodes, such as the STF-Ru exsolution anodes, show promising catalytic reforming activity and electrochemical activity with steam/ethanol mixtures.
JOURNAL OF POWER SOURCES
(2022)
Article
Chemistry, Multidisciplinary
Junil Choi, Minho Kim, Song Kyu Kang, Jihoon Kim, Jungseub Ha, Hyun Ho Shin, Taiho Park, Won Bae Kim
Summary: In this study, a bifunctional electrode material for electrochemical oxidations and CO2 electrolysis was successfully prepared. By in situ phase transition and exsolution of Ni-Fe alloy nanoparticles in a reducing atmosphere, NiFe-R.P.PSFNNb exhibited superior electrochemical performance.
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
(2022)
Article
Chemistry, Physical
Chunming Xu, Wang Sun, Rongzheng Ren, Xiaoxia Yang, Minjian Ma, Jinshuo Qiao, Zhenhua Wang, Shuying Zhen, Kening Sun
Summary: This study introduces a novel anode material, Sr1.95Fe1.4Co0.1Mo0.5O6-δ (SFCoM), designed for intermediate-temperature solid oxide fuel cells (IT-SOFCs), which exhibits enhanced electrocatalytic activity and resistance to carbon deposition. By combining A-site defect regulation and B-site doping, the in-situ exsolved Co nanoparticle greatly improves the performance of the anode material, leading to promising potential for high-performance IT-SOFC anodes.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2021)
Article
Chemistry, Physical
Yujie Wu, Shuai Wang, Yue Gao, Xiang Yu, Haotian Jiang, Bo Wei, Zhe Lu
Summary: A promising anode material decorated with copper-iron bimetallic nanoparticles was prepared by in-situ exsolution, providing abundant active sites for fuel oxidation and leading to improved polarization resistance and maximum power density in solid oxide fuel cells.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Materials Science, Ceramics
Minghui Ke, Wenjuan Wang, Xudong Yang, Baoguang Li, Haibin Li
Summary: In this study, anodes with double perovskite structure, La0.5Sr1.5Ti1.5Fe0.5O3-6, La0.5Sr1.5Ti1.5Co0.5O3-6, and La0.5Sr1.5Ti1.5Ni0.5O3-6, were synthesized for solid oxide fuel cells. Doping Fe, Co, and Ni elements into strontium titanate showed great potential in adjusting the conductivity and sintering kinetics of the anode materials.
CERAMICS INTERNATIONAL
(2022)
Article
Chemistry, Physical
Jiadong Jiang, Ying Zhang, Xin Yang, Yu Shen, Tianmin He
Summary: Exsolution of Co-Fe alloy nanoparticles in double perovskite anodes has been shown to significantly enhance catalytic activity and stability in solid oxide fuel cells under both wet H-2 and wet CH4 conditions. This study demonstrates the potential of using exsolved transition metals to improve fuel cell performance.
ACS APPLIED ENERGY MATERIALS
(2021)
Article
Chemistry, Physical
Yue Wang, Qing Shen, Yongcheng Tong, Zhongliang Zhan
Summary: Tailoring the surface chemistry of oxides is effective in adjusting their catalytic behavior. In this study, nickel-doped cerium oxide nanorods were synthesized and evaluated as anode catalysts for solid oxide fuel cells. The results show that the incorporation of nickel significantly enhances the catalytic activity, which is attributed to the presence of nanoparticles and increased surface active oxygen.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Chemistry, Physical
Kun Zheng, Jakub Lach, Pawel Czaja, Michal Gogacz, Patryk Czach, Agnieszka Brzoza-Kos, Piotr Winiarz, Jie Luo
Summary: The chemical modification of perovskites through tungsten doping in Sr2Fe2-xWxO6-delta has shown significant impact on the physicochemical properties and electrochemical performance of electrode materials for solid oxide cells. A high-performance quasi-symmetrical solid oxide cell design has been proposed, demonstrating excellent power outputs and good current density in various conditions. The in situ exsolved metallic iron nanoparticles decorated on the anode contribute to the excellent electrochemical performance of cells.
JOURNAL OF POWER SOURCES
(2023)
Article
Chemistry, Physical
Menglin Wu, Haoyang Yu, Jiupai Ni, Chengsheng Ni
Summary: In this study, perovskite-type La0.8Ce0.2FeO3 is utilized as a host oxide for the exsolution of ceria in air, and further doped with Pr3+ or Gd3+ to achieve the exsolution of PrOx- and Gd2O3- doped ceria for potential anode materials in solid oxide fuel cells. The LPCF anode with 1 wt% Ni infiltration demonstrates the lowest polarization resistance and highest cell performance at 800 degrees C in H2 fuel, while LCF and LGCF anodes show stability under hydrocarbon fuel conditions.
JOURNAL OF POWER SOURCES
(2022)
Article
Chemistry, Multidisciplinary
Xiaoyu Zhang, Yawen Tong, Tong Liu, Dong Zhang, Na Yu, Jian Zhou, Yueqin Li, Xiang-Kui Gu, Yao Wang
Summary: A highly efficient Ruddlesden-Popper structure anode material, RP-SFMN, has been developed for hydrocarbon fueled solid oxide fuel cells (HF-SOFC). By utilizing in-situ exsolved Ni nanocatalysts, the material significantly enhances power density and lowers electrode polarization resistance, demonstrating good electrocatalytic activity and stability during operation.
Article
Chemistry, Physical
Kian Yousefipour, Rasoul Sarraf-Mamoory, Amin Yourdkhani
Summary: Researchers improved the electrical conductivity and supercapacitive properties of hydrated nickel molybdate by synthesizing Fe-doped HNMO/rGO materials. They found that the material with 15 mg mL(-1) graphene oxide suspension exhibited the best electrochemical performance.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2022)
Article
Chemistry, Physical
Mingchao Su, Daoming Huan, Xueyu Hu, Kang Zhu, Ranran Peng, Changrong Xia
Summary: The study demonstrates that Ca-doped LaCoO3-delta and LaCoO3-delta oxides can effectively overcome CO2 poisoning issues, showing high electrical conductivity and thermal compatibility. Compared to LCCo, LCFe exhibits better CO2 tolerance and higher electrochemical performance.
JOURNAL OF POWER SOURCES
(2022)
Article
Chemistry, Physical
Yanhong Wan, Yi Yang, Yalin Lu, Ranran Peng, Changrong Xia
Summary: This study found that doping bismuth into lanthanum chromate-based perovskites can significantly enhance the electrochemical activity for CO2 reduction reaction and improve the physicochemical properties, leading to a substantial improvement in the performance of symmetrical solid oxide electrolysis cells.
ACS APPLIED ENERGY MATERIALS
(2022)
Article
Nanoscience & Nanotechnology
Lu Zhang, Daoming Huan, Kang Zhu, Pengqi Dai, Ranran Peng, Changrong Xia
Summary: Doping of Mn in SrFeO(3-delta) perovskites can regulate their phase structure, enhance cathode performance, and improve stability in CO2 atmospheres.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Nanoscience & Nanotechnology
Shaowei Zhang, Yunan Jiang, Hairui Han, Yihang Li, Changrong Xia
Summary: This study proposes a Ni and F co-doping strategy to improve the electrocatalysts for CO2 reduction reaction (CO2RR). The results show that F-doping and Ni-Fe exsolution enhance CO2 adsorption and reaction rate, while reducing interfacial polarization resistance. The direct CO2 electrolysis in the SOEC achieves a high current density and stability.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Nanoscience & Nanotechnology
Binze Zhang, Shaowei Zhang, Hairui Han, Kaibin Tang, Changrong Xia
Summary: The partial replacement of iron element with gallium in PrBaFe2O5+delta can improve its electrochemical performance as a cathode material for intermediate-temperature solid oxide fuel cells. Specifically, PrBaFe1.9Ga0.1O5+delta exhibits improved physicochemical properties and electrochemical properties, such as an increased oxygen surface exchange coefficient (kchem) and enhanced oxygen dissociation process. Moreover, the anode-supported single cell with PBFG0.1 cathode shows a higher peak power density and good stability in long-term operation.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Materials Science, Ceramics
Kang Zhu, Nai Shi, Lijie Zhang, Daoming Huan, Xinyu Li, Xiaoyu Zhang, Rui Song, Changrong Xia, Ranran Peng, Yalin Lu
Summary: Oxygen vacancy engineering via calcium-doping is proposed and validated to improve proton conduction in proton conducting oxides. The presence of more oxygen vacancies and the tailored position of vacancies accelerate proton diffusion and increase proton concentration. The doped compound BZCa1Y2 exhibits higher proton concentration, ionic conductivity, and proton diffusion coefficient compared to BZY2.
CERAMICS INTERNATIONAL
(2023)
Article
Chemistry, Physical
Binze Zhang, Shaowei Zhang, Zhen Zhang, Kaibin Tang, Changrong Xia
Summary: A highly efficient and robust metal-supported solid oxide electrolysis cell (SOEC) is developed, which exhibits redox stability, minimal ohmic loss, high conductivity, enlarged specific surface area, and enhanced CO2 adsorption property. The metal-supported SOEC with the infiltrated cathode shows excellent current densities and stability, making it a promising configuration for direct CO2 electrolysis.
JOURNAL OF POWER SOURCES
(2023)
Article
Chemistry, Physical
Hairui Han, Xueyu Hu, Binze Zhang, Shaowei Zhang, Yanxiang Zhang, Changrong Xia
Summary: A method was proposed to determine the chemical surface exchange coefficient (k(chem)) and reveal the ORR process of porous dual-phase composites based on electrical conductivity relaxation measurements and the distribution of characteristic time (DCT) model. The method was demonstrated with porous LSCF-SDC composites, and it was found that the ORR process involved a combination of gas diffusion, surface exchange, and their interaction. The addition of SDC greatly improved k(chem) in the dual-phase composites, with the highest improvement achieved at around 10% SDC volume fraction. The method is also applicable for analyzing CO2 reduction and vapor splitting reactions in solid oxide electrolysis cells.
JOURNAL OF MATERIALS CHEMISTRY A
(2023)
Article
Chemistry, Physical
Rui Song, Xiaoyu Zhang, Daoming Huan, Xinyu Li, Nai Shi, Changrong Xia, Ranran Peng, Yalin Lu
Summary: The slow kinetics of cathodic oxygen reduction reaction is a key barrier to the development of protonic ceramic fuel cells (PCFCs), but the recent discovery of triple-conductive materials has opened up new possibilities for their commercialization. In this study, a highly efficient and stable cathode material called BCFZSc is proposed for PCFCs. Experimental results show that BCFZSc has excellent hydration ability and water tolerance, and it exhibits a significantly higher oxygen surface exchange coefficient compared to most reported cathodes. Using BCFZSc as cathode, single cell achieves excellent peak power density and durability.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Engineering, Environmental
Yongtao Zhao, Shaowei Zhang, Mingchao Su, Daoming Huan, Ranran Peng, Changrong Xia
Summary: In this study, a stoichiometric CuFe2 alloy was successfully electroplated on the surface of SUS 430, forming a CuFe2O4 spinel coating through in-situ thermal oxidation. The mechanism of CuFe2 alloy electroplating was revealed using density functional theory calculations and COMSOL simulations. The dense CuFe2O4 coating effectively blocked the outward volatile Cr species and suppressed the increase in area specific resistance (ASR) in long-term testing. The practical application of CuFe2O4-coated SUS 430 showed improved durability due to mitigated chromium poisoning.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Chemistry, Applied
Xiaoye Liu, Xiangkun Kong, Wenyi Xiang, Yining Jiang, Bingqinq Xiong, Weiwei Ping, Changrong Xia, Daoming Huan, Chengwei Wang
Summary: In this study, a new garnet-type composite solid-state electrolyte (LLBZNO-LCO) was proposed to improve the chemical stability and electrochemical properties of garnet with high-temperature processing. The addition of a small amount of LCO significantly decreased the interface resistance and reduced the sintering temperature of garnet-type LLBZNO. The all-solid-state battery based on the sintered LLBZNO-LCO SSE showed excellent cycling stability. This approach provides a new strategy for optimizing the comprehensive performance of garnet SSE.
JOURNAL OF ENERGY CHEMISTRY
(2023)
Article
Materials Science, Multidisciplinary
Xinyu Li, Zemin Chen, Daoming Huan, Bingbing Qiu, Kang Zhu, Zeming Qi, Hengjie Liu, Changrong Xia, Ranran Peng, Yalin Lu
Summary: This study demonstrates the successful modification of proton-conducting solid oxide fuel cell (PCFC) cathode surfaces using boron (B), leading to improved CO2 resistance and surface electrocatalytic activity for proton-involved oxygen reduction reaction (P-ORR). The introduction of B raises the surface Bronsted acid (-OH) concentration while suppressing the surface Lewis acidity, ultimately enhancing the power density of the PCFC.
ACS MATERIALS LETTERS
(2023)
Article
Chemistry, Physical
Lujuan Ye, Kang Zhu, Yunan Jiang, Shaowei Zhang, Ranran Peng, Changrong Xia
Summary: Solid oxide electrolysis cells (SOECs) can efficiently convert CO2 into valuable chemicals. Ceria with exsolved Fe nanoparticles on its surface shows enhanced electrochemical performance for CO2 reduction reaction (CO2RR).
JOURNAL OF MATERIALS CHEMISTRY A
(2023)
Article
Chemistry, Physical
Hairui Han, Yunan Jiang, Shaowei Zhang, Changrong Xia
Summary: This perspective paper estimates the possible physiochemical processes for the oxygen reduction reaction (ORR) in porous mixed ionic-electronic conductors (MIECs) by comparing the oxygen supply/consumption fluxes through calculation. It also discusses the potential problems associated with different characterization techniques and reveals the significant delay in the ORR process caused by gas diffusion. The aim of this paper is to recommend a reasonable method to characterize the true ORR kinetics of porous electrodes and quantify the effect of gas diffusion.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2023)
Article
Chemistry, Physical
Yunan Jiang, Lujuan Ye, Shaowei Zhang, Changrong Xia
Summary: Fe-exsolved ceria is a highly efficient cathode for CO2 electrolysis in SOEC, where dopant Fe is partially reduced to dispersed Fe-0 nanoparticles, greatly enhancing the catalytic activity for CO2 reduction. At 700 degrees C, the cathode polarization resistance is 0.57 omega cm(2), and the chemical surface exchange coefficient for CO2 reduction is 1.68 x 10(-3) cm s(-1), outperforming metal-exsolved perovskite cathodes at 800 degrees C.
JOURNAL OF MATERIALS CHEMISTRY A
(2022)