IF 2.8 4区化学

Ionics Pub Date : 2024-08-18 DOI: 10.1007/s11581-024-05768-y

Kangping Gao, Jianjie Sun, Ziyi Huang, Chengqi Liu

引用次数: 0

Electrocatalyst for the oxygen reduction reaction (ORR): towards an active and stable electrocatalyst for low-temperature PEM fuel cell 氧还原反应 (ORR) 的电催化剂：为低温 PEM 燃料电池开发一种活跃而稳定的电催化剂

IF 2.8 4区化学

Ionics Pub Date : 2024-08-17 DOI: 10.1007/s11581-024-05767-z

K.P. Jithul, B. Tamilarasi, Jay Pandey

{"title":"Electrocatalyst for the oxygen reduction reaction (ORR): towards an active and stable electrocatalyst for low-temperature PEM fuel cell","authors":"K.P. Jithul, B. Tamilarasi, Jay Pandey","doi":"10.1007/s11581-024-05767-z","DOIUrl":"https://doi.org/10.1007/s11581-024-05767-z","url":null,"abstract":"Green hydrogen–fueled low-temperature proton exchange membrane (PEM) fuel cells have emerged as one of the most attractive technologies for electric-vehicle (EV) applications due to their high efficiency, zero emissions, and potential for renewable energy integration. The performance of the PEM fuel cells is significantly affected by the electrochemical activity of the oxygen reduction reaction (ORR) catalyst. This review comprehensively examines the role of ORR electrocatalysts in PEM fuel cell efficiency for portable, transport, and stationary applications. In this direction, we discuss the fundamentals of PEM fuel cell operation, the critical role of electrocatalysts, and advanced characterization techniques. A detailed overview of ORR electrocatalyst types, including platinum-based, non-noble metal-based, and carbon-supported as well as noncarbon supported, is presented, emphasizing recent advancements in design and synthesis. The review concludes with discussing current challenges and future directions for ORR electrocatalyst development. Understanding the characteristics and recent developments of ORR catalysts is essential for researchers and engineers to optimize the performance and durability of PEM fuel cells, thereby promoting the wider adoption of clean and efficient energy technologies. By providing insights into electrocatalyst characteristics and emerging trends, this work aims to accelerate the adoption of clean and efficient PEM fuel cell technology.<h3 data-test=\"abstract-sub-heading\">Graphical Abstract</h3>\u0000","PeriodicalId":599,"journal":{"name":"Ionics","volume":null,"pages":null},"PeriodicalIF":2.8,"publicationDate":"2024-08-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142225359","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Three-dimensional nickel-silicide foam loaded with dense silicon nanowires as a robust anode for lithium-ion batteries 负载致密硅纳米线的三维硅化镍泡沫作为锂离子电池的坚固负极

IF 2.8 4区化学

Ionics Pub Date : 2024-08-16 DOI: 10.1007/s11581-024-05764-2

Ting-Ting Liu, Zhuo-Feng Ye, Shang-Qi Li, Yi Zhang, Yao-Wen Zhang, Xin-Tao Li, Fei-Hu Du

{"title":"Three-dimensional nickel-silicide foam loaded with dense silicon nanowires as a robust anode for lithium-ion batteries","authors":"Ting-Ting Liu, Zhuo-Feng Ye, Shang-Qi Li, Yi Zhang, Yao-Wen Zhang, Xin-Tao Li, Fei-Hu Du","doi":"10.1007/s11581-024-05764-2","DOIUrl":"https://doi.org/10.1007/s11581-024-05764-2","url":null,"abstract":"Silicon, with its many advantages, is gaining attention in the field of lithium-ion battery anode materials. However, severe volume swelling, poor conductivity, and slow Li+ diffusion kinetics are major obstacles to enhancing the electrochemical properties of silicon anodes. One-dimensional silicon nanowires with a high aspect ratio can effectively ameliorate these issues, while the complexity of the synthesis method limits its development. Here, a three-dimensional flexible electrode of binary-phase Ni-silicide foam loaded with silicon nanowires (NixSiy@Si NWs) was constructed in two simple steps: preparation of metal catalyst nanoparticles using a chemical plating approach and production of silicon nanowires by the supercritical fluid-liquid–solid mechanism. Benefiting from the excellent anchoring ability and superior electrical conductivity of NixSiy as well as the extra space and favorable Li+ and electrolyte diffusion paths provided by the Si NWs network, the as-obtained anode exhibits a high initial Coulombic efficiency of 77% at 0.5 A g−1, excellent cycling performance (a reversible capacity of 1238 mAh g−1 after 200 cycles) and outstanding rate capability (2675, 2497, 2164, 1740, and 1222 mAh g−1 at 0.5, 1, 2, 4, and 8 A g−1, respectively).","PeriodicalId":599,"journal":{"name":"Ionics","volume":null,"pages":null},"PeriodicalIF":2.8,"publicationDate":"2024-08-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142197847","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Microwave intervened dye extracted from the fruits of Reutealis trisperma and its persuasive effect on the transport of charge carriers in DSSC 从 Reutealis trisperma 果实中提取的微波干预染料及其对 DSSC 中电荷载流子传输的促进作用

IF 2.8 4区化学

Ionics Pub Date : 2024-08-14 DOI: 10.1007/s11581-024-05771-3

Saranya Kumaresan, Ravi Subban, Janarthanan Balasundaram

引用次数: 0

PVA generated carbon-coated natural graphite anode material for enhanced performances of lithium-ion batteries 用于提高锂离子电池性能的 PVA 生成碳涂层天然石墨负极材料

IF 2.8 4区化学

Ionics Pub Date : 2024-08-14 DOI: 10.1007/s11581-024-05765-1

Shidi Wang, Yang Li, Lijun Wang, Yongmin Qiao, Jianguang Xu, Jing Li, Suna Zhang

引用次数: 0

Microstructure modulation realizing high performance of Pb-Ag alloys by controlled solidification temperature 通过控制凝固温度实现高性能铅银合金的微观结构调控

IF 2.8 4区化学

Ionics Pub Date : 2024-08-14 DOI: 10.1007/s11581-024-05725-9

Xinxin Zhou, XiaoQiang Yu, Cheng Jiang, Buming Chen, Hui Huang, Jun Guo, Chao Gao, Ruidong Xu, Zhongcheng Guo

{"title":"Microstructure modulation realizing high performance of Pb-Ag alloys by controlled solidification temperature","authors":"Xinxin Zhou, XiaoQiang Yu, Cheng Jiang, Buming Chen, Hui Huang, Jun Guo, Chao Gao, Ruidong Xu, Zhongcheng Guo","doi":"10.1007/s11581-024-05725-9","DOIUrl":"https://doi.org/10.1007/s11581-024-05725-9","url":null,"abstract":"The microstructure of the Pb-Ag alloy is vital to its mechanical, corrosion, and electrochemical properties. In this paper, heat preservation mold is used to control the temperature of cast lead alloy, realizing the regulation of the microstructure of Pb-Ag alloy. The effects of the surface microstructure and the Ag distribution on the mechanical, corrosion-resistant, and electrochemical properties of lead alloy are investigated. The results show that the heat preservation treatment effectively enhances the longitudinal tissue uniformity of the alloy and optimizes the distribution of Ag in the alloy. The alloy shows the best comprehensive performance as the heat preservation temperature reaches 50℃ due to the uniform size of the metallographic structure and the most uniformly distributed Ag. The low-temperature heat preservation treatment (12℃) refines the middle and bottom grains of the alloy and enhances the mechanical properties of the alloy. However, the increased uniform grain size and Ag distribution at the longitudinal level of the alloy led to a decrease in the electrochemical properties and corrosion resistance.","PeriodicalId":599,"journal":{"name":"Ionics","volume":null,"pages":null},"PeriodicalIF":2.8,"publicationDate":"2024-08-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142197853","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Exploring the capacitance of a novel nickel fluoride hydroxide nanomaterial in aqueous solutions 探索新型氟化氢镍纳米材料在水溶液中的电容量

IF 2.8 4区化学

Ionics Pub Date : 2024-08-14 DOI: 10.1007/s11581-024-05760-6

Yanli Zhang, Liangliang Dong, Li Wang, Qiang Zhang, Xiangming He

{"title":"Exploring the capacitance of a novel nickel fluoride hydroxide nanomaterial in aqueous solutions","authors":"Yanli Zhang, Liangliang Dong, Li Wang, Qiang Zhang, Xiangming He","doi":"10.1007/s11581-024-05760-6","DOIUrl":"https://doi.org/10.1007/s11581-024-05760-6","url":null,"abstract":"The pursuit of an electrode material that is electrochemically active in aqueous solutions and possesses both high energy density and abundant resources is critical for the development of aqueous hybrid capacitors, which are integral to clean energy storage systems. In this study, we introduce for the first time a novel nickel compound with two anions, displaying a high theoretical energy density—the Ni4OHF7 nanomaterial. We provide a comprehensive analysis of its structure and its electrochemical performance in alkaline aqueous solutions. The Ni4OHF7 nanomaterial is found to be composed of particles approximately 20 nm in size. The electrochemical behavior of Ni4OHF7 in alkaline aqueous solution is mediated by redox reactions occurring between Ni4+ and Ni3+, as well as between Ni3+ and Ni2+. The electrochemical mechanism is primarily diffusion-controlled faradic intercalation process. The study delves into the impact of charge–discharge regulations. Notably, the voltammetric specific capacitance reaches 84.5 F g −1 at a scan rate of 0.03 V s −1, while the discharge specific capacitance is as high as 1128.3 F g −1 at a current density of 1 A g −1. The voltammetric specific capacitance initially increases along with cycling before diminishing and ultimately stabilizes at approximately 30 F g −1 at a scan rate of 0.1 V s −1. The decline in capacitance is attributed to the progressive increase of the charge transfer resistance. The assembled activated carbon (AC)/Ni4OHF7 hybrid capacitor exhibits superior energy and power densities (103.0 Wh kg −1, 7560.7 W kg −1).","PeriodicalId":599,"journal":{"name":"Ionics","volume":null,"pages":null},"PeriodicalIF":2.8,"publicationDate":"2024-08-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142197851","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Electrochemical synthesis of graphene oxide/palladium composite for the detection of norepinephrine in the presence of ascorbic acid and uric acid 电化学合成氧化石墨烯/钯复合材料，用于在抗坏血酸和尿酸存在下检测去甲肾上腺素

IF 2.8 4区化学

Ionics Pub Date : 2024-08-13 DOI: 10.1007/s11581-024-05758-0

S Renjini, Akhilash Mohanan Pillai, Pinky Abraham, P A Pavitha

引用次数: 0

Synthesis of SnO2-ZnO heterojunction composites for effective degradation of methylene blue and chromium (VI) under solar light irradiation 在太阳光照射下合成可有效降解亚甲基蓝和铬（VI）的 SnO2-ZnO 异质结复合材料

IF 2.8 4区化学

Ionics Pub Date : 2024-08-13 DOI: 10.1007/s11581-024-05766-0

D. Venkatesh, G. S. Gayathri, Vivek Panyam Muralidharan, S. Vasanthan, S. Geetha, P. Rajeswaran, S. Kumaran, P. Siva Karthik

{"title":"Synthesis of SnO2-ZnO heterojunction composites for effective degradation of methylene blue and chromium (VI) under solar light irradiation","authors":"D. Venkatesh, G. S. Gayathri, Vivek Panyam Muralidharan, S. Vasanthan, S. Geetha, P. Rajeswaran, S. Kumaran, P. Siva Karthik","doi":"10.1007/s11581-024-05766-0","DOIUrl":"https://doi.org/10.1007/s11581-024-05766-0","url":null,"abstract":"In this work, SnO2/ZnO nanocomposites were synthesized via hydrothermal treatment, and their structural, optical, and morphological properties were characterized using various techniques, including powder X-ray diffraction (XRD), Raman spectroscopy, Fourier-transform infrared (FT-IR) spectroscopy, UV–visible (UV–vis) spectroscopy, and photoluminescence (PL) spectra. The photocatalytic performance of the SnO2/ZnO nanocomposites was evaluated for the degradation of dual pollutants, specifically chromium (VI) (Cr (VI)) and methylene blue (MB), under solar light irradiation. The results demonstrated an enhanced degradation efficiency for both Cr (VI) and MB, achieving degradation rates of 89 and 92%, respectively, within 90 min of exposure to solar light. The rate constant for the decomposition of Cr (VI) was determined to be 0.0059 min−1 while the rate constant for the degradation of MB was found to be 0.0071 min−1. These values compare favorably with existing standards in the field, where typical rate constants for similar photocatalysts range between 0.0020 and 0.0065 min−1 for Cr (VI) and 0.0030 and 0.0068 min−1 for MB degradation. These findings underscore the potential of SnO2/ZnO nanocomposites for effective photocatalytic treatment of industrial pollutants under solar light, outperforming several existing photocatalysts in terms of degradation efficiency and rate constants.","PeriodicalId":599,"journal":{"name":"Ionics","volume":null,"pages":null},"PeriodicalIF":2.8,"publicationDate":"2024-08-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142197856","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

KOH-activated hard carbon spheres with enhanced pseudo-capacitance for superior low-temperature electrochemical performance of Li-ion batteries 具有增强伪电容的 KOH 活性硬碳球，可为锂离子电池带来卓越的低温电化学性能

IF 2.8 4区化学

Ionics Pub Date : 2024-08-13 DOI: 10.1007/s11581-024-05761-5

Jianqiang Guo, Heng Guo, Yizhi Zhu

引用次数: 0

Ionics最新文献