Article
Chemistry, Physical
Elena Giordano, Enrico Berretti, Laura Capozzoli, Alessandro Lavacchi, Mohsin Muhyuddin, Carlo Santoro, Irene Gatto, Andrea Zaffora, Monica Santamaria
Summary: This study assessed the effectiveness of sulfuric acid as a supporting electrolyte for methanol fuel composition. The results showed that the peak power curve in DMFCs with Pt/C cathode electrocatalysts increased progressively from 70 mW cm-2 (0 mM of H2SO4) to 115 mW cm-2 with a concentration of 100 mM of H2SO4. These results highlighted the positive effect of the addition of a supporting electrolyte in the methanol aqueous solution on the enhanced electrochemical output.
JOURNAL OF POWER SOURCES
(2023)
Article
Chemistry, Physical
Guoyu Shi, Tetsuro Tano, Donald A. Tryk, Akihiro Iiyama, Makoto Uchida, Katsuyoshi Kakinuma
Summary: The study demonstrates that the activity of Pt/Nb-SnO2 catalyst increases with temperature and Pt loading, as the high Pt loading leads to the formation of a surface structure favorable for ORR. This enhancement is attributed to an increase in the pre-exponential factor of the Arrhenius equation, possibly linked to the increased exposure of (111)-like facets.
Article
Chemistry, Multidisciplinary
Yanmin Hu, Mengzhao Zhu, Xuan Luo, Geng Wu, Tingting Chao, Yunteng Qu, Fangyao Zhou, Rongbo Sun, Xiao Han, Hai Li, Bin Jiang, Yuen Wu, Xun Hong
Summary: Efficient and highly stable catalysts for the oxygen reduction reaction are essential for long-term operation of proton exchange membrane fuel cells. The coplanar Pt-carbon nanomeshes synthesized in this study exhibit excellent activity and stability in fuel cell tests, with peak power density of 1.21 W cm(-2) and current density of 0.360 A cm(-2) at 0.80 V in the H-2/O-2 cell. Density-functional theory analysis suggests that the increased vacancy formation energy of Pt atoms in coplanar Pt/C NMs helps restrain Pt dissolution and aggregation.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2021)
Article
Chemistry, Physical
Yi Cheng, Mengen Wang, Shanfu Lu, Chongjian Tang, Xing Wu, Jean-Pierre Veder, Bernt Johannessen, Lars Thomsen, Jin Zhang, Shi-ze Yang, Shuangyin Wang, San Ping Jiang
Summary: The study developed atomically dispersed bimetallic FeCu coordinated with nitrogen-doped carbon nanotubes (FeCu/N-CNTs) as Pt-free oxygen reduction reaction (ORR) electrocatalysts, which showed similar performance to Pt/C but with better stability and enhanced activity in the presence of phosphate. DFT calculations revealed that the phosphate promotion effect was due to stronger binding of phosphate on Cu sites, leading to lower activation energy barrier for O-2 cleavage. FeCu/N-CNTs were also found to have better ORR activity compared to Fe single atom catalysts coordinated with nitrogen-doped carbon nanotubes, Fe/N-CNTs. The results demonstrate the potential of FeCu/N-CNTs as true Pt-free, highly active and durable cathodes in high temperature polymer electrolyte fuel cells based on PA/PBI.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2021)
Article
Electrochemistry
Minghao Xie, Yifeng Shi, Ruhui Chen, Min Shen, Younan Xia
Summary: This study reports a continuous and scalable method for the production of carbon-supported Pt-M alloy nanocrystals. A fluidic device was used for the in situ nucleation and growth of Pt-M nanocrystals on a commercial carbon support. The size, shape, and composition of the nanocrystals can be tuned by changing the metal precursors. Among the nanocrystals, carbon-supported Pt-Co nanocrystals showed the highest activity, with several-fold enhancements compared to commercial catalysts.
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
(2022)
Article
Chemistry, Physical
Xinxin Zhu, Lei Huang, Min Wei, Panagiotis Tsiakaras, Pei Kang Shen
Summary: A novel self-etched Pt-Co nanodendrite in nanoframe (Pt-Co ND-NF) was synthesized for the first time. It exhibited improved catalytic performance and stability, offering promising ways for highly strengthening catalytic activity.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2021)
Article
Chemistry, Physical
Weiyue Zhao, Bin Chi, Lecheng Liang, Pengfei Yang, Wei Zhang, Xin Ge, Liming Wang, Zhiming Cui, Shijun Liao
Summary: This study demonstrates the development of a highly active and durable Pt-based ternary catalyst for improving the sluggish oxygen reduction reaction in fuel cells. The catalyst shows faster reaction kinetics and minimal activity loss compared to commercial catalysts, and its superior performance has been verified in practical applications.
Article
Chemistry, Multidisciplinary
Xuan Liu, Zhonglong Zhao, Jiashun Liang, Shenzhou Li, Gang Lu, Cameron Priest, Tanyuan Wang, Jiantao Han, Gang Wu, Xiaoming Wang, Yunhui Huang, Qing Li
Summary: In this study, L1(0)-Pt2CuGa intermetallic nanoparticles with a unique covalent atomic interaction between Pt-Ga were reported as high-performance cathode catalysts in proton exchange membrane fuel cells (PEMFCs). The L1(0)-Pt2CuGa/C catalyst showed superb oxygen reduction reaction (ORR) activity and stability. The theoretical calculations revealed that the optimized adsorption of oxygen intermediates on the L1(0)-Pt2CuGa surface resulted from the formed biaxial strain, and the durability enhancement was attributed to the stronger Pt-M bonds compared to L1(1)-PtCu due to the Pt-Ga covalent interactions.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Review
Chemistry, Multidisciplinary
Xueru Zhao, Kotaro Sasaki
Summary: This article introduces the application of Pt-based core-shell catalysts in proton-exchange membrane fuel cells. By low Pt loading and high corrosion resistance, Pt-based core-shell catalysts can alleviate the drawbacks of existing catalysts and enhance the activity and stability of the oxygen reduction reaction. The article provides a detailed overview of the synthesis strategies, catalytic mechanisms, and optimization of the catalysts' performance by considering factors such as shape, composition, and surface structure. The potential of core-shell catalysts in real fuel cells is evaluated.
ACCOUNTS OF CHEMICAL RESEARCH
(2022)
Article
Green & Sustainable Science & Technology
Sachin Kumar, Athira Yoyakki, Ajmal Pandikassala, Roby Soni, Sreekumar Kurungot
Summary: Commercially available Pt/C catalysts used in PEMFCs suffer from insufficient triple-phase boundary formation and carbon oxidation, leading to shortened lifetime and efficiency. To address this issue, a new class of carbon-free electrocatalysts was developed by dispersing Pt nanoparticles on ZrP nanoplates. The Pt/ZrP electrocatalyst showed improved durability and 4.6 times higher mass activity compared to Pt/C. Single-cell level validation demonstrated achievable current densities of 0.600, 0.890, and 0.890 A cm(-2) for ZrP@Pt, Pt/ZrP, and Pt/C, respectively, in PEMFC.
ADVANCED SUSTAINABLE SYSTEMS
(2023)
Article
Chemistry, Physical
Yuxin Liu, Jing Ye, Fanpeng Kong, Chunyu Du, Pengjian Zuo, Lei Du, Geping Yin
Summary: A Pt/C-TiO2 catalyst has been developed against SO2 poisoning during ORR, showing superior performance in ORR and anti-toxicity. The accelerated removal of poisonous SO2 on Pt surfaces is achieved through the interaction between Pt and TiO2 as well as the abundant hydroxyl groups on the surface of TiO2.
Article
Engineering, Environmental
Min Song, Faqiang Li, Qian Zhang, Tao Shen, Guanyu Luo, Dinggen Li, Deli Wang
Summary: Controlling the crystal phase of intermetallics has been proven to enhance the performance of oxygen reduction reaction (ORR). In this study, structure ordered Pt-Mn intermetallics with face-centered cubic Pt3Mn and face-centered tetragonal PtMn were synthesized and the PtMn intermetallics exhibited higher activity and better structural stability due to the rational control of crystal phase.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Chemistry, Multidisciplinary
Xianling Wu, Dumei Wang, Xueming Kang, Dongtang Zhang, Yong Yan, Guangsheng Guo, Zaicheng Sun, Xiayan Wang
Summary: The development of methanol-tolerant catalysts is essential for commercializing fuel cells. In this study, we reported a facile synthesis of graphene-supported Pt/Bi catalysts with high oxygen reduction activity and methanol poisoning tolerance. The catalyst showed great potential in the application of direct methanol fuel cells.
Article
Chemistry, Physical
Yizhe Chen, Xiao Zhao, Huangli Yan, Liangyu Sun, Shengli Chen, Shiming Zhang, Jiujun Zhang
Summary: This paper proposes a method to synthesize Pt-skin on the surface of alloyed Pt-Cu nanospheres using an acidic reductant. The catalyst exhibits excellent activity and stability in oxygen reduction reaction, with a maximum power density of about 1.2 W cm-2 and long-term operation of 40,000 cycles. Multiple characterizations confirm the formation of core/shell structure and the enhancement effect of Pt-skin on both catalytic activity and stability.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2023)
Article
Chemistry, Multidisciplinary
Fan Xia, Bomin Li, Yiqi Liu, Yuzi Liu, Siyuan Gao, Ke Lu, Jacob Kaelin, Rongyue Wang, Tobin J. Marks, Yingwen Cheng
Summary: The Chevrel phase chalcogenide Ni2Mo6S8 is a novel active motif for reducing oxygen to H2O2, exhibiting exceptional activity with high selectivity, fast turnover frequencies, and stable crystal structure for continuous H2O2 production.
ADVANCED FUNCTIONAL MATERIALS
(2021)
Article
Electrochemistry
Gisela C. Luque, Maria R. Gennero de Chialvo, Abel C. Chialvo
JOURNAL OF SOLID STATE ELECTROCHEMISTRY
(2016)
Article
Electrochemistry
Gisela C. Luque, Maria R. Gennero de Chialvo, Abel C. Chialvo
ELECTROCHEMISTRY COMMUNICATIONS
(2016)
Article
Electrochemistry
Gisela C. Luque, Maria R. Gennero de Chialvo, Abel C. Chialvo
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
(2017)
Article
Chemistry, Multidisciplinary
Maria R. Gennero de Chialvo, Gisela C. Luque, Abel C. Chialvo
Article
Materials Science, Multidisciplinary
Gisela C. Luque, Maria R. Gennero de Chialvo, Abel C. Chialvo
MATERIALS CHEMISTRY AND PHYSICS
(2019)
Article
Chemistry, Physical
Gisela C. Luque, Maria A. Montero, Maria R. Gennero de Chialvo, Abel C. Chialvo
Article
Engineering, Chemical
Gisela C. Luque, Rocio Sturtz, Mario C. G. Passeggi (Jr), Luis M. Gugliotta, Veronica D. G. Gonzalez, Roque J. Minari
INTERNATIONAL JOURNAL OF ADHESION AND ADHESIVES
(2020)
Article
Biochemistry & Molecular Biology
Gisela C. Luque, Matias L. Picchio, Ana P. S. Martins, Antonio Dominguez-Alfaro, Liliana C. Tome, David Mecerreyes, Roque J. Minari
MACROMOLECULAR BIOSCIENCE
(2020)
Article
Chemistry, Analytical
Maria A. Montero, Gisela C. Luque, Maria R. Gennero de Chialvo, Abel C. Chialvo
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
(2020)
Correction
Chemistry, Physical
Gisela C. Luque, Maria A. Montero, Maria R. Gennero de Chialvo, Abel C. Chialvo
Article
Chemistry, Physical
Tianyu Chen, Zhibin Lu, Guangjin Zeng, Yongmin Xie, Jie Xiao, Zhifeng Xu
Summary: The study introduces a high-performance LSGM electrolyte-supported tubular DC-SOFC stack for portable applications, which shows great potential in developing into high-performing, efficient, and environmentally friendly portable power sources for distributed applications.
JOURNAL OF POWER SOURCES
(2024)
Article
Chemistry, Physical
Wenbin Tong, Yili Chen, Shijie Gong, Shaokun Zhu, Jie Tian, Jiaqian Qin, Wenyong Chen, Shuanghong Chen
Summary: In this study, a three-dimensional porous NiO interface layer with enhanced anode dynamics is fabricated, forming a Schottky contact with the zinc substrate, allowing rapid and uniform zinc plating both inside and below the interface layer. The resulting NiO@Zn exhibits exceptional stability and high capacity retention.
JOURNAL OF POWER SOURCES
(2024)
Article
Chemistry, Physical
Yafeng Bai, Kaidi Li, Liying Wang, Yang Gao, Xuesong Li, Xijia Yang, Wei Lu
Summary: In this study, a flexible zinc ion supercapacitor with gel electrolytes, porous alpha-MnO2@reduced graphene oxide cathode, and activated carbon/carbon cloth anode was developed. The device exhibits excellent electrochemical performance and stability, even at low temperatures, with a high cycle retention rate after 5000 cycles.
JOURNAL OF POWER SOURCES
(2024)
Article
Chemistry, Physical
Anmol Jnawali, Matt D. R. Kok, Francesco Iacoviello, Daniel J. L. Brett, Paul R. Shearing
Summary: This article presents the results of a systematic study on the electrochemical performance and mechanical changes in two types of commercial batteries with different anode chemistry. The study reveals that the swelling of anode layers in batteries with silicon-based components causes deformations in the jelly roll structure, but the presence of a small percentage of silicon does not significantly impact the cycling performance of the cells within the relevant state-of-health range for electric vehicles (EVs). The research suggests that there is room for improving the cell capacities by increasing the silicon loading in composite anodes to meet the increasing demands on EVs.
JOURNAL OF POWER SOURCES
(2024)
Article
Chemistry, Physical
Yohandys A. Zulueta, My Phuong Pham-Ho, Minh Tho Nguyen
Summary: Advanced atomistic simulations were used to study ion transport in the Na- and K-doped lithium disilicate Li2Si2O5. The results showed that Na and K doping significantly enhanced Li ion diffusion and conduction in the material.
JOURNAL OF POWER SOURCES
(2024)
Article
Chemistry, Physical
Zongying Han, Hui Dong, Yanru Yang, Hao Yu, Zhibin Yang
Summary: An efficient phase inversion-impregnation approach is developed to fabricate BaO-decorated Ni8 mol% YSZ anode-supported tubular solid oxide fuel cells (SOFCs) with anti-coking properties. BaO nanoislands are successfully introduced inside the Ni-YSZ anode, leading to higher peak power densities and improved stability in methane fuel. Density functional theory calculations suggest that the loading of BaO nanoislands facilitates carbon elimination by capturing and dissociating H2O molecules to generate OH.
JOURNAL OF POWER SOURCES
(2024)
Article
Chemistry, Physical
Suresh Mamidi, Dan Na, Baeksang Yoon, Henu Sharma, Anil D. Pathak, Kisor Kumar Sahu, Dae Young Lee, Cheul-Ro Lee, Inseok Seo
Summary: Li-CO2 batteries, which utilize CO2 and have a high energy density, are hindered in practical applications due to slow kinetics and safety hazards. This study introduces a stable and highly conductive ceramic-based solid electrolyte and a metal-organic framework catalyst to improve the safety and performance of Li-CO2 batteries. The optimized Li-CO2 cell shows outstanding specific capacity and cycle life, and the post-cycling analysis reveals the degradation mechanism of the electrodes. First-principles calculations based on density functional theory are also performed to understand the interactions between the catalyst and the host electrode. This research demonstrates the potential of MOF cathode catalyst for stable operation in Li-CO2 batteries.
JOURNAL OF POWER SOURCES
(2024)
Article
Chemistry, Physical
Ganghua Xiang, Zhihuan Qiu, Huilong Fei, Zhigang Liu, Shuangfeng Yin, Yuen Wu
Summary: In this study, a CeFeOx-supported Pt single atoms and subnanometric clusters catalyst was developed, which exhibits enhanced catalytic activity and stability for the preferential oxidation of CO in H2-rich stream through synergistic effect.
JOURNAL OF POWER SOURCES
(2024)
Article
Chemistry, Physical
Dimitrios Chatzogiannakis, Marcus Fehse, Maria Angeles Cabanero, Natalia Romano, Ashley Black, Damien Saurel, M. Rosa Palacin, Montse Casas-Cabanas
Summary: By coupling electrochemical testing to operando synchrotron based X-ray absorption and powder diffraction experiments, blended positive electrodes consisting of LiMn2O4 spinel (LMO) and layered LiNi0.5Mn0.3Co0.2O2 (NMC) were studied to understand their redox mechanism. It was found that blending NMC with LMO can enhance energy density at high rates, with the blend containing 25% LMO showing the best performance. Testing with a special electrochemical setup revealed that the effective current load on each blend component can vary significantly from the nominal rate and also changes with SoC. Operando studies allowed monitoring of the oxidation state evolution and changes in crystal structure, in line with the expected behavior of individual components considering their electrochemical current loads.
JOURNAL OF POWER SOURCES
(2024)
Article
Chemistry, Physical
Chiara Cementon, Daniel Dewar, Thrinathreddy Ramireddy, Michael Brennan, Alexey M. Glushenkov
Summary: This Perspective discusses the specific power and power density of lithium-ion capacitors, highlighting the fact that their power characteristics are often underestimated. Through analysis, it is found that lithium-ion capacitors can usually achieve power densities superior to electrochemical supercapacitors, making them excellent alternatives to supercapacitors.
JOURNAL OF POWER SOURCES
(2024)
Article
Chemistry, Physical
Weihao Wang, Hao Yu, Li Ma, Youquan Zhang, Yuejiao Chen, Libao Chen, Guichao Kuang, Liangjun Zhou, Weifeng Wei
Summary: This study achieved an improved electrolyte with excellent low-temperature and high-voltage performance by regulating the Li+ solvation structure and highly concentrating it. The electrolyte exhibited outstanding oxidation potential and high ionic conductivity under low temperature and high voltage conditions, providing a promising approach for the practical application of high-voltage LIBs.
JOURNAL OF POWER SOURCES
(2024)
Article
Chemistry, Physical
Martin Bures, Dan Gotz, Jiri Charvat, Milos Svoboda, Jaromir Pocedic, Juraj Kosek, Alexandr Zubov, Petr Mazur
Summary: Vanadium redox flow battery is a promising energy storage solution with long-term durability, non-flammability, and high overall efficiency. Researchers have developed a mathematical model to simulate the charge-discharge cycling of the battery, and found that hydraulic connection of electrolyte tanks is the most effective strategy to reduce capacity losses, achieving a 69% reduction.
JOURNAL OF POWER SOURCES
(2024)
Article
Chemistry, Physical
M. Rodriguez-Gomez, J. Campo, A. Orera, F. de La Fuente, J. Valenciano, H. Fricke, D. S. Hussey, Y. Chen, D. Yu, K. An, A. Larrea
Summary: In this study, we analysed the operando performance of industrial lead cells using neutron diffraction experiments. The experiments revealed the evolution of different phases in the positive electrode, showed significant inhomogeneity of phase distribution inside the electrode, and estimated the energy efficiency of the cells.
JOURNAL OF POWER SOURCES
(2024)
Article
Chemistry, Physical
Jiawei Liu, Chenpeng Wang, Yue Yao, Hao Ye, Yinglong Liu, Yingli Liu, Xiaoru Xu, Zhicong Chen, Huazheng Yang, Gang Wu, Libin Lei, Chao Wang, Bo Liang
Summary: The study focuses on utilizing double conductive Ni-pads as anode collectors in micro-tubular solid oxide fuel cells. The simulation results show excellent performance and stability of DCNPs, and also highlight the potential applications in various fields.
JOURNAL OF POWER SOURCES
(2024)
Article
Chemistry, Physical
Yang Wang, Kangjie Zhou, Lang Cui, Jiabing Mei, Shengnan Li, Le Li, Wei Fan, Longsheng Zhang, Tianxi Liu
Summary: This study presents a polyimide sandwiched separator (s-PIF) for improving the cycling stability of Li-metal batteries. The s-PIF separator exhibits superior mechanical property, electrolyte adsorption/retention and ion conductivity, and enables dendrite-free Li plating/stripping process.
JOURNAL OF POWER SOURCES
(2024)