Article
Nanoscience & Nanotechnology
Nai Shi, Yun Xie, Yi Yang, Daoming Huan, Yang Pan, Ranran Peng, Changrong Xia, Chusheng Chen, Zhongliang Zhan, Yalin Lu
Summary: This study successfully addresses the challenges encountered in the direct utilization of methane in solid oxide fuel cells through the improvement of anode materials and catalysts, achieving excellent performance.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Electrochemistry
Yuta Iida, Keisuke Kameda, Manabu Ihara
Summary: The study focused on the electrode potential behavior and reaction model of pulse jet solid oxide fuel cells (PJ-SOFCs), proposed a novel evaluation method for fuel electrode performance, and successfully applied it to research on other hydrocarbon fuels.
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
(2021)
Article
Chemistry, Physical
Hafiz Ahmad Ishfaq, Muhammad Zubair Khan, Muhammad Taqi Mehran, Rizwan Raza, Waqas Hassan Tanveer, Saira Bibi, Amjad Hussain, Hafiz Ali Muhammad, Rak-Hyun Song
Summary: Controlling the drying rate enables the formation of a continuous film-like active catalyst on the cathode of solid oxide fuel cells, leading to significantly improved performance and durability of the cells.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Chemistry, Physical
Yun Chen, Sergio A. Paredes-Navia, Cesar-Octavio Romo-De-La-Cruz, Liang Liang, Andre Fernandes, Alec Hinerman, Jacky Prucz, Mark Williams, Xueyan Song
Summary: The study demonstrates that applying a unary electrocatalyst of Pt or CoOx to the LSCF/SDC composite electrode can mitigate the cation surface segregation and improve conductivity and the oxygen reduction reaction. ALD coating reduces cell ohmic resistance and enhances cathode conductivity and durability.
JOURNAL OF POWER SOURCES
(2021)
Article
Energy & Fuels
Wei Zhang, Fusheng Yin, Zhenhui Cheng, Suping Peng, Chunwen Sun
Summary: To address the performance degradation of solid oxide fuel cells (SOFCs) caused by carbon deposition, a new anode with nanostructured heterogeneous interfaces was developed by integrating 0.38 wt% Sn and 0.19 wt% MgO into Ni-SDC for hydrocarbon-fueled SOFCs. The cell with this anode showed a peak power density of 374 mW cm-2 and excellent long-term stability for 100 hours in humidified methane at 700 degrees C. The improved performance was attributed to the decreased rate of carbon deposition, increased activation barrier for methane cracking, prevention of nickel carbide formation, and enhanced rate of carbon removal.
Article
Multidisciplinary Sciences
Kuo Yang, Jinzhe Li, Zhongkui Zhao, Zhongmin Liu
Summary: A capillary micro-reaction system was used to monitor the initial stage of methane oxidation over platinum catalyst, revealing the presence of oxygenated intermediates. Methane pre-treatment at 600 degrees C was found to shorten the induction period by generating highly active species. Based on these findings and in situ characterizations, a reaction pathway for methane oxidation over Pt was proposed.
Article
Nanoscience & Nanotechnology
Sandip K. Pahari, Yit-Tsong Chen
Summary: This study investigates the formation of intermediates in electrocatalyst-assisted water splitting using a bifunctional mechanism, and confirms the role of functionalized carboxylates in improving catalytic efficiency through pH-dependent and isotope labeling experiments.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Chemistry, Physical
Mumin Rao, Zhengpeng Chen, Qixi Deng, Mingfei Li, Zongming Zhang, Shujun Li, Kai Xiong, Chuangting Chen, Yiyang Xue, Mengru Qi, Xuemei Ou, Yunfeng Tian, Yihan Ling
Summary: A Ni0.9Cu0.1 TiO3-$ catalytic reforming layer is coated on the traditional Ni-based anode of solid oxide fuel cells using ethanol as fuel. The reforming layer decomposes into Ni-Cu alloy and TiO2 under reducing atmosphere, which greatly improves the coking resistance performance of the anode. The cells with Ni0.9Cu0.1TiO3-$ layer exhibit excellent electrocatalytic performance, with a maximum power density of 867 mW cm-2 at 800 degrees C. It also demonstrates good coking resistance and electrocatalytic activity in the 50-hour stability test.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Chemistry, Physical
Ziling Wang, Caichen Yang, Jian Pu, Yunfeng Tian, Jian Wang, Francesco Ciucci, Bo Chi
Summary: Morphology regulation is an effective way to improve the electrocatalytic activity of SOFC cathodes, and nanofibers have been confirmed to have advantages in this aspect. This study employed a sintering-free method to in-situ self-assemble LCaFN nanofibers onto the YSZ electrolyte surface, which showed impressive performance compared to previous work. These findings demonstrate the promising strategy of combining fiber cathodes and in-situ self-assembly techniques for high-performance SOFCs.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Chemistry, Physical
Ben Ma, Zhaohui Chen, Zhuang Lin, Lin Cheng, Yingke Zhou
Summary: This study investigates the effects of Mg doping on the performance of Mn-Cr spinel oxide cathodes in solid oxide fuel cells (SOFCs). Both experimental results and density functional theory (DFT) calculations show that Mg doping can optimize the electronic structure of the spinel oxide, increase the oxygen vacancy concentration, and improve the electrical conductivity and catalytic activity. The Mg-doped Mn-Cr spinel oxide cathode exhibits superior performance with high area-specific polarization resistance and maximum power density.
JOURNAL OF POWER SOURCES
(2023)
Article
Chemistry, Physical
Jeong Woo Shin, Seongkook Oh, Sungje Lee, Dohyun Go, Joonsuk Park, Hyong June Kim, Byung Chan Yang, Gu Young Cho, Jihwan An
Summary: Surface modification of electrodes is crucial for improving the performance of low-temperature solid oxide fuel cells. The ALD CeO2-coated Pt anode structure showed a significant improvement in anode kinetics, leading to a decrease in activation resistance and an increase in maximum power density.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Energy & Fuels
Xiaolong Zhao, Baozhong Zhu, Yunlan Sun, Jiuyu Chen, Jianzhong Liu
Summary: This study investigates the reaction behavior of ethanol molecule on the boron (001) surface using density functional theory. The most preferable reaction path for the decomposition of ethanol is from CH3CH2OH to CH3CH2O to CH2CH2O and eventually forms C. Boron plays an important catalytic role in the decomposition of ethanol, and the presence of oxidation sites on the boron (001) surface effectively reduces the energy barriers of the reaction.
Article
Engineering, Environmental
Zhiping Ye, Guanjie Wang, Jean-marc Giraudon, Anton Nikiforov, Jun Chen, Liang Zhao, Xiuwen Zhang, Jiade Wang
Summary: The study found that the different crystal phases have a significant impact on the Cu-Mn catalytic ozonation of toluene, with the amorphous phase Cu0.2MnOx showing better catalytic performance.
JOURNAL OF HAZARDOUS MATERIALS
(2022)
Article
Chemistry, Physical
Zhenxin Lin, Kai Zhao, Gang Cheng, Shuozhen Hu, Min Chen, Jun Li, Dongchu Chen, Qing Xu, Menglei Chang, Ogenko Volodymyr
Summary: A novel NiMo-Yttira-stabilized zirconia (YSZ) catalyst-layer supported tubular single cell is developed for solid oxide fuel cells running on methane. The NiMo-YSZ layer shows excellent reforming performance with high methane conversion, H2 and CO yield. The single cell demonstrates good electrochemical performance and stability, making it a promising option for direct operation in CH4/Air environments.
JOURNAL OF POWER SOURCES
(2021)
Article
Engineering, Electrical & Electronic
Zewei Shao, Aibin Huang, Chen Ming, John Bell, Pu Yu, Yi-Yang Sun, Liangmao Jin, Liyun Ma, Hongjie Luo, Ping Jin, Xun Cao
Summary: This study presents fast-switching electrochromic devices based on all-solid-state tandem structures using protons as the diffusing species. The devices exhibit high contrast ratios, fast responses, good colouration efficiency, and excellent cycling stability.
NATURE ELECTRONICS
(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
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
Nanqi Gong, Jianlin Wang, Shuai Huang, Liangbing Ge, Zheling Shan, Jian Zhang, Haoliang Huang, Ranran Peng, Zhengping Fu, Yalin Lu
Summary: In this study, high-quality Sr4Fe6O13 epitaxial films were successfully synthesized by investigating the growth conditions. The competition between Sr4Fe6O13 and SrFeO2.5 in terms of Gibbs free energies was revealed through experiments and density functional theory calculations. The results of this study are important for the development of other films with similar layered superlattice structures and the investigation of their intrinsic properties.
CERAMICS INTERNATIONAL
(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
Electrochemistry
Yun Xie, Nai Shi, Xueyu Hu, Kang Zhu, Ranran Peng, Changrong Xia, Ming Chen
Summary: This study demonstrates that the novel electrochemical catalyst improves the stability and electrochemical performance of R-PCCs. The enhanced stability and performance of the air electrode catalyst may be attributed to the higher electronegativity of La, which reduces basicity and improves chemical stability in acidic atmospheres; the smaller ionic radius of La, which alleviates lattice distortion; and the stronger interaction between La and lattice oxygen, inhibiting structural degradation caused by Sr segregation.
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
(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)
