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, Multidisciplinary
Yinghua Niu, Yucun Zhou, Weiqiang Lv, Yu Chen, Yanxiang Zhang, Weilin Zhang, Zheyu Luo, Nicholas Kane, Yong Ding, Luke Soule, Yuchen Liu, Weidong He, Meilin Liu
Summary: Intermediate temperature solid oxide fuel cells (IT-SOFCs) face challenges due to the sluggish oxygen reduction reaction (ORR) and cathode degradation. A highly efficient multiphase catalyst coating significantly enhances the ORR activity and durability. Experimental results show improved peak power density and increased durability against Cr and H2O. Both the BCFN phase and BaCO3 phase contribute to the improved performance of the LSCF cathode.
ADVANCED FUNCTIONAL MATERIALS
(2021)
Article
Chemistry, Physical
Yuan Gao, Xiqiang Huang, Zhe Wang, Mengke Yuan, Juntao Gao, Zhe Lv, Lingling Xu, Bo Wei
Summary: This study evaluates the electrochemical performance of SCT10 cathodes in the presence of Cr impurities. The results demonstrate that Cr impurities lead to significant performance degradation, especially in wet conditions. Morphological damages and the formation of SrCrO4 and Co3O4 secondary phases on the cathode surface contribute to the deterioration of oxygen reduction kinetics and cathode activity. The study highlights the importance of surface Sr segregation in Cr deposition and emphasizes the need for attention in practical applications in solid oxide fuel cells.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Chemistry, Physical
Zhenwei Wang, Haibin Sun, Jiao Li, Xue Guo, Qiangqiang Hu, Zanzhong Yang, Fangyong Yu, Guochang Li
Summary: By infiltrating ESB, the polarization resistances and activation energy of LSCF cathodes were significantly reduced, improving the oxygen reduction reaction process and enhancing the performance of intermediate-temperature solid oxide fuel cells.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Chemistry, Physical
Jiongyuan Huang, Quan Liu, San Ping Jiang, Ling Zhao, Na Ai, Xin Wang, Yanqun Shao, Chengzhi Guan, Huihuang Fang, Yu Luo, Kongfa Chen
Summary: The infiltration of BaCO3 nanoparticles improves the performance of LSCF cathodes and enhances their tolerance to Cr species.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2023)
Article
Materials Science, Ceramics
K. P. Padmasree, Ke-Yu Lai, Arumugam Manthiram
Summary: The calcium cobaltite Ca(3-x)La(x)Co(4-y)CuyO(9+delta) doped with x and y = 0 and 0.1 showed slightly affected electrical and thermal properties, with the undoped sample exhibiting improved symmetrical cell performance in intermediate-temperature solid oxide fuel cells.
CERAMICS INTERNATIONAL
(2022)
Article
Chemistry, Physical
Le Sun, Naizhi Li, Chusheng Chen, Zhongliang Zhan
Summary: The study found that the performance of solid oxide fuel cells depends on the pore structure of the supporting cathode, with a straight pore structure and SDC-modified pore surface promoting surface oxygen exchange, oxygen species transport, and ion and electron conduction in the electrode. Ceramic cathode-supported cells showed better stability than cermet anode-supported cells, and further research on supporting cathodes is needed to increase power output density.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Chemistry, Physical
Jihao Zhang, Huding Guo, Libin Lei, Shuanglin Shen, Keqing Zheng, Minfang Han
Summary: A practical segmented cell measurement method is developed to detect fuel starvation in solid oxide fuel cells (SOFCs) at local regions. By segmenting the cathode and only measuring the voltage signal, the local current-voltage (I-V) curve per segment is determined. The area specific resistance (ASR) is calculated and compared among segments to validate the data reliability. Fuel starvation is estimated using the rapid voltage drop in I-V curves and the rapid ASR increment in I-ASR curves, with the ASR increment being a more sensitive criterion.
JOURNAL OF POWER SOURCES
(2023)
Article
Green & Sustainable Science & Technology
Xiuqing Lv, Huili Chen, Wei Zhou, Si-Dian Li, Fangqin Cheng, Zongping Shao
Summary: In this study, the issue of CO2 poisoning in SrCoO3-delta 5-based materials was addressed by co-doping iron, zirconium, and yttrium. The newly formed material, SCFZY, exhibited significant CO2-tolerance as a cathode for solid oxide fuel cells (SOFCs), along with high power density and good durability.
Article
Engineering, Environmental
Juntao Gao, Yingying Liu, Yuan Gao, Mengke Yuan, Zhe Wang, Zhe Lu, Qiang Li, Bo Wei
Summary: This study developed cobalt-free fluorine doped Bi0.7Sr0.3FeO3-6 oxides for energetic cathodes of low-temperature solid oxide fuel cells.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Chemistry, Multidisciplinary
Cheng Cheng Wang, Mortaza Gholizadeh, Bingxue Hou, Xincan Fan
Summary: The study investigated the integrated Cr and S poisoning of LSCF cathodes in solid oxide fuel cells, showing that such poisoning can lead to increased polarization and ohmic resistance, resulting in performance degradation of the cell. The degradation phenomenon caused by integrated Cr and S deposition was found to be more severe, indicating its higher unpredictability.
Article
Nanoscience & Nanotechnology
Weilin Zhang, Yucun Zhou, A. Mohammed Hussain, Dong Song, Yohei Miura, Yu Chen, Zheyu Luo, Nicholas Kane, Yinghua Niu, Nilesh Dale, Yosuke Fukuyama, Meilin Liu
Summary: This study focuses on the development of durable nanostructured electrodes for solid oxide fuel cells (SOFCs) using a simple and cost-effective method. The symmetrical cells and single cells fabricated in this work exhibit good performance and stability, indicating a promising pathway for high-performance and durable SOFCs powered by natural gas.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Chemistry, Physical
Sea-Fue Wang, Yung-Fu Hsu, Yi-Le Liao, Shih-Ting Huang, Piotr Jasinski
Summary: The perovskite NdSrCo2O5+delta (NSCO) shows high electrical conductivity and is used as the cathode material for Ce0.8Gd0.2O2-delta (GDC)-supported microtubular solid oxide fuel cells (MT-SOFCs). By varying design parameters, the MT-SOFC with an outer tube diameter of 1.86 mm, an electrolyte thickness of 180 um, and a 5NSCO-5GDC composite cathode exhibits the best performance, with high power density and mechanical integrity. The results demonstrate the high electrochemical activity of the NSCO-GDC composite and exceed existing MT-SOFCs in terms of power density.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Materials Science, Ceramics
Zhangfa Huang, Zhijun Liu, Hua Hu, Jianxin Wang, Ming Chen, Baohua Cao, Qin Wang, Jun Yang, Wanbing Guan, Tongxiang Liang
Summary: A Co-containing composite cathode material with low thermal expansion coefficient and good compatibility has been prepared by the solid-liquid method. The cathode exhibits low polarization resistance and high power density, making it a promising material for intermediate temperature solid oxide fuel cells.
CERAMICS INTERNATIONAL
(2022)
Article
Nanoscience & Nanotechnology
Zhongqiu Li, Bo Guan, Fang Xia, Jiuyuan Nie, Wenyuan Li, Liang Ma, Wei Li, Lingfeng Zhou, Yi Wang, Hanchen Tian, Jian Luo, Yan Chen, Matthew Frost, Ke An, Xingbo Liu
Summary: A new series of HEPs are investigated as cathode materials for SOFCs, achieving both chromium tolerance and high performance. The A-site elements have a significant influence on overall performance, and using the three most active elements simultaneously leads to the best candidate. Excellent Cr tolerance has been observed, with degradation of only 0.25%/kh during operation.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Electrochemistry
Yi Cheng, Felix Kwofie, Zibo Chen, Ruiming Zhang, Zhitao Wang, San Ping Jiang, Junchao Zheng, Haolin Tang
Summary: Carbon nanotubes provide a stable platform for studying oxygen evolution reaction (OER) mechanisms under different pH conditions. The study reveals that OER on carbon nanotubes is primarily constrained by water deprotonation in acidic and neutral conditions, but shifts to a different mechanism and kinetics in alkaline conditions due to competition discharge between hydroxide ions and water.
ELECTROCHIMICA ACTA
(2023)
Article
Nanoscience & Nanotechnology
Zhiyi Chen, Lizhen Jiang, Zhongwei Yue, Dehua Dong, Na Ai, San Ping Jiang, Desen Zhao, Xin Wang, Yanqun Shao, Kongfa Chen
Summary: The adhesion of nanofibers to the electrolyte without damaging their original morphology is a challenge for the application of nanofiber electrodes in ReSOCs. This study demonstrates a facile approach of direct assembly and electrochemical polarization to achieve firm adhesion and retain the unique microstructure of PBCC nanofiber air electrodes, resulting in high-performance and durable ReSOCs.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Materials Science, Multidisciplinary
Yiming Zou, Lin Jing, Leyan Wang, Hui Teng Tan, Ronn Goei, Sidney Kwong Roong Yong, Amanda Jiamin Ong, Kwan W. Tan, Alfred Iing Yoong Tok
Summary: A facile and tunable approach involving sequential atomic layer deposition (ALD) and electric Joule heating (EJH) alloying process has been developed to grow noble metal medium entropy alloy (MEA) thin films with high atomic composition precision. The integrated method allows precise control over film thickness and atomic ratio, while promoting homogeneous alloying of MEA combinations and inhibiting phase separation. This method opens up new possibilities for the controllable synthesis of multicomponent metal alloy thin films with potential catalytic, magnetic, and optical properties.
ADVANCED ENGINEERING MATERIALS
(2023)
Editorial Material
Chemistry, Multidisciplinary
Marliyana Aizudin, Murali Krishna Sudha, Ronn Goei, Shun Kuang Lua, Rafeeque Poolamuri Pottammel, Alfred Iing Yoong Tok, Edison Huixiang Ang
CHEMISTRY-A EUROPEAN JOURNAL
(2023)
Article
Chemistry, Multidisciplinary
Marliyana Aizudin, Murali Krishna Sudha, Ronn Goei, Shun Kuang Lua, Rafeeque Poolamuri Pottammel, Alfred Iing Yoong Tok, Edison Huixiang Ang
Summary: Freshwater production through solar-driven interfacial evaporation is considered a sustainable solution, but the lack of renewable materials remains a major obstacle for practical solar desalination. This study introduces a simple two-step carbonization method to produce innovative two-dimensional molybdenum carbide (Mo2C) materials from carbonized fruit wastes. The resulting 2D Mo2C photothermal layer exhibits an efficient water evaporation rate of 1.52 kg m(-2) h(-1) and a photothermal conversion efficiency of 94% under one sun irradiation, which is one of the best reported values. The broad solar absorption band, high specific surface area (555.1 m(2) g(-1)) with micro- and meso porosity contribute to these remarkable results. The conversion of food wastes into valuable products, such as MXene, has the potential to inspire greener developments of advanced materials for solar water evaporators.
CHEMISTRY-A EUROPEAN JOURNAL
(2023)
Article
Materials Science, Multidisciplinary
Chun-Yu Cheng, Yuan-Yuan Guo, Yi-Ming Zou, Amanda Jiamin Ong, Alfred Iing Yoong Tok, Shuzhou Li
Summary: The melting mechanisms of Pt-based multimetallic nanoparticles (NPs) were investigated using molecular dynamics (MD) simulation. The study found that the melting and coalescence behaviors of heterogeneous Pd-Pt NPs with different sizes and compositions varied, and PtPd alloy could form at the Pd/Pt interface before complete melting of Pd NP. Furthermore, a two-step melting process was observed in Pd/Pt/Ir trimetallic NPs.
Article
Chemistry, Physical
Rikson Siburian, Fajar Hutagalung, Oktavian Silitonga, Suriati Paiman, Lisnawaty Simatupang, Crystina Simanjuntak, Sri Pratiwi Aritonang, Yatimah Alias, Lin Jing, Ronn Goei, Alfred Iing Yoong Tok
Summary: In this article, the performance of Copper/Graphene Nano Sheets (Cu/GNS) and C-pi (Graphite, GNS, and Nitrogen-doped Graphene Nano Sheets (N-GNS)) as new battery electrode prototypes is presented. The Cu/GNS/ electrolyte/N-GNS prototype showed improved electrical conductivities and power density compared to commercial batteries. The research data suggest that Cu/GNS/ electrolyte/N-GNS can be used as a new battery electrode prototype with better performances and electrical activities.
Article
Green & Sustainable Science & Technology
Zehua Wang, Jin Zhang, Shanfu Lu, Yan Xiang, Zongping Shao, San Ping Jiang
Summary: Development of high temperature polymer electrolyte membrane fuel cells (HT-PEMFCs) at elevated temperatures is essential for improving CO tolerance and developing non-precious metal catalysts. This study investigates the in situ formation of metal pyrophosphates in phosphoric acid doped polybenzimidazole (PA/PBI) composite membranes, and their influence on proton conductivity and performance of HT-PEMFCs.
ADVANCED SUSTAINABLE SYSTEMS
(2023)
Article
Engineering, Chemical
Dalei Sun, Yating Yang, Jinghui Cai, Yanxiong Fang, San Ping Jiang
Summary: Effective capture and utilization of CO2 is critical for reducing greenhouse gas emissions and achieving a low-carbon economy. In this study, bismuth oxides with different crystallized phases (alpha, beta, delta, gamma) were synthesized and used as photo, thermal, and photothermal catalysts for the carbonylation of isobutyl amine with CO2. The results showed that the alpha-Bi2O3 exhibited the highest catalytic performance, with a conversion of 50.38% and a selectivity of 91.79% for N,N'-diisobutylurea. Further characterization of Bi2O3 polymorphs revealed that the differences in photothermal catalytic activity could be attributed to the efficiencies of photoinduced carriers separation.
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2023)
Article
Chemistry, Multidisciplinary
Lin Jing, Yiming Zou, Ronn Goei, Leyan Wang, Jiamin Amanda Ong, Anatoli Kurkin, Yun Li, Kwan W. Tan, Alfred Iing Yoong Tok
Summary: The current methods for synthesizing high-entropy alloy (HEA) thin-film coatings face challenges in preparation, thickness control, integration, and cost. In this study, a facile and controllable synthesis process was developed for quinary HEA coatings consisting of noble metals. The resulting thin film showed promising potential as a catalyst for the hydrogen evolution reaction, with improved performance and stability compared to other noble metal-based structures.
Article
Chemistry, Multidisciplinary
Xuefei Wang, Tianyi Liu, Haitao Li, Chao Han, Panpan Su, Na Ta, San Ping Jiang, Biao Kong, Jian Liu, Zhenguo Huang
Summary: The article explores the importance of mass transfer in catalytic processes, specifically in the electrocatalytic oxygen reduction reaction (ORR) by tailoring the pore sizes. By employing a confined-etching strategy, boron-and nitrogen-doped carbon (B,N@C) electrocatalysts with abundant active sites but different porous structures were fabricated. The ORR performance was found to be correlated with reactant diffusion, with the optimized B,N@C catalysts featuring trimodal-porous structures demonstrating enhanced O2 diffusion and improved activity per heteroatomic site. The study highlights the significance of nanoarchitecture engineering in catalysts and provides insights into optimizing structures with abundant active sites and enhanced mass transfer.
Article
Polymer Science
Boon Peng Chang, Aleksandr Kashcheev, Andrei Veksha, Grzegorz Lisak, Ronn Goei, Kah Fai Leong, Alfred ling Yoong Tok, Vitali Lipik
Summary: The addition of oxygenated carbon nanotubes significantly improves the physical, mechanical, and dynamic impact properties of EVA foam, without compromising its rebound performance. This study presents promising opportunities for lightweight high-rebound midsoles in running shoes.
Article
Chemistry, Multidisciplinary
Dinda Gusti Ayu, Saharman Gea, Dewi Junita Andriayani, Dewi Junita Telaumbanua, Averroes Fazlur Rahman Piliang, Mahyuni Harahap, Zhihao Yen, Ronn Goei, Alfred Iing Yoong Tok
Summary: This study successfully synthesized carbon dots (CDs), nitrogen-doped zinc oxide (N-ZnO), and N-ZnO/CD nanocomposites as photo catalysts for degradation of methylene blue (MB). The CDs were synthesized using a hydrothermal method, with soybean and ethylenediamine as dopants. N-ZnO was synthesized by calcination with urea as the nitrogen dopant. The N-ZnO/CD nanocomposites showed the highest photodegradation efficiency, making them ideal for organic compound decolorization in wastewater treatment.
Article
Chemistry, Physical
Jun Li, Yujun Zhang, Kai Zhao, San Ping Jiang, Min Chen
Summary: In this paper, the authors study the characteristics of chromium evaporation, oxide scale growth, and deposition of chromium on the oxygen reduction reaction (ORR) on (La,Sr)MnO3 (LSM) cathode in intermediate-temperature solid oxide fuel cells. The results indicate that the volatilization of chromium is influenced by the composition and morphology of the oxide scale, and the deposition of chromium on the LSM cathode degrades the electrochemical activity of the ORR. These findings provide insights into the mechanism of chromium poisoning in intermediate-temperature conditions.
JOURNAL OF POWER SOURCES
(2023)
Article
Materials Science, Multidisciplinary
Ilham Alkian, Avita Khilyatu Hadiyanto, Avita Khilyatu Hafni, Febio Dalanta, Griszha Azzahra, Moh Iir Ilsatoham, Yen Zhihao, Yiming Zou, Ronn Goei, Alfred Iing Yoong Tok, Heri Sutanto
Summary: This study aims to optimize the development process of bismuth oxide/carbon dots (Bi2O3/Cdots) using microwave-assisted precipitation for antibiotics removal. The results show that the composite has good optical properties and structural characteristics, and can effectively degrade various antibiotic pollutants.
MATERIALS CHEMISTRY AND PHYSICS
(2023)
