Article
Chemistry, Multidisciplinary
Cyril Tlou Selepe, Sandile Surprise Gwebu, Thabo Matthews, Tebogo Abigail Mashola, Ludwe Luther Sikeyi, Memory Zikhali, Nobanathi Wendy Maxakato
Summary: Carbon nano-onions (CNOs) were successfully synthesized using flame pyrolysis, with Pd-Sn/CNOs electro-catalysts showing improved performance in methanol and ethanol electro-oxidation under alkaline conditions. The characterization techniques confirmed the structure and properties of the materials, with PdSn alloy formation on the CNO surface contributing to the enhanced catalytic activity.
Article
Chemistry, Analytical
Ayan Mukherjee, Wei-Nien Su, Chun-Jern Pan, Suddhasatwa Basu
Summary: A facile one pot synthesis route was adopted to prepare Pd@CuO/C core-shell nanostructure for ethylene glycol oxidation. The nanostructure exhibited enhanced electro-catalytic performance, lower Tafel slope and charge transfer resistance compared to Pd/C, attributed to the modification of the electronic structure of Pd and CuO due to the formation of core-shell structure.
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
(2021)
Article
Electrochemistry
C. Lo Vecchio, A. Serov, M. Dicome, B. Zulevi, A. S. Arico, V Baglio
Summary: In this study, a long-term durability investigation was conducted on a Platinum Group Metal-free cathodic electro-catalyst for direct methanol fuel cells. Results showed a significant performance decrease after 100 hours of operation, with potential causes including catalyst aggregation, reduction of carbon and nitrogen species, and Ruthenium migration leading to poisoning of the membrane and cathode catalyst.
ELECTROCHIMICA ACTA
(2021)
Article
Chemistry, Multidisciplinary
Xianmeng Song, Xia-Guang Zhang, Yong-Liang Deng, Zi-Ang Nan, Weishen Song, Yanjie Wang, Linzhe Lu, Qiaorong Jiang, Xi Jin, Yanping Zheng, Mingshu Chen, Zhaoxiong Xie, Jian-Feng Li, Zhong-Qun Tian, Feng Ru Fan
Summary: The study shows that utilizing the hydrogen storage capacity of the Pd interlayer, the Au@Pd@Ru nanocatalyst enhances the catalytic activity of Ru metal in the hydrogen oxidation reaction potential range. This has great significance in reducing the cost of anion exchange membrane fuel cells (AEMFCs).
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2023)
Article
Energy & Fuels
Muthusankar Eswaran, Shadi Rahimi, Santosh Pandit, Bavatharani Chokkiah, Ivan Mijakovic
Summary: In this work, a flexible, multifunctional polyimide (PI)/Au-polyaniline (PAN)/Pd nanocomposite electrode with excellent electrochemical properties was fabricated. The electrode showed high conductivity, rapid response, and high electron transfer rate due to the strong metal-polymer interaction between PAN and Pd. It demonstrated successful biomedical sensing of glucose and electrooxidation of alcohols such as methanol and ethanol, making it promising for healthcare diagnostics and alternative energy conversion devices.
Article
Chemistry, Multidisciplinary
M. Zikhali, T. Matthews, C. T. Selepe, K. A. Adegoke, K. Mugadza, S. S. Gwebu, N. W. Maxakato
Summary: Palladium carbon nanotubes and palladium-niobium carbon nanotubes electro-catalysts were successfully synthesized through alcohol reduction method. The synthesized electro-catalysts were characterized using various physicochemical techniques, revealing the presence of hollow tubular structures with multi-walled carbon nanotubes and palladium-niobium nanoparticles. The electrochemical behavior of these electro-catalysts for alcohol electro-oxidation was investigated, and the palladium-niobium carbon nanotubes demonstrated superior activity and tolerance to poisoning.
MATERIALS TODAY CHEMISTRY
(2023)
Review
Chemistry, Multidisciplinary
Guili Zhao, Caihong Fang, Jinwu Hu, Deliang Zhang
Summary: This article highlights the importance of Pt-based electrocatalysts in direct alcohol fuel cells, while addressing the challenges they face in commercial applications and proposing key measures to improve their activity and durability and reduce costs.
Article
Chemistry, Physical
Mi Peng, Zhimin Jia, Zirui Gao, Ming Xu, Danyang Cheng, Meng Wang, Chengyu Li, Linlin Wang, Xiangbin Cai, Zheng Jiang, Hong Jiang, Ning Wang, Dequan Xiao, Hongyang Liu, Ding Ma
Summary: Atomically dispersed Pd catalysts supported on annealed nanodiamond exhibit superior activity and stability in propane direct dehydrogenation, with better resistance to coke formation. The high dispersion of Pd species in the catalyst is well-preserved during the reaction, leading to significantly improved performance compared to cluster/particle catalysts at high-reaction temperatures. This work provides deeper insights into designing highly dispersed metal catalysts with in situ regeneration of active sites in high-temperature catalytic reactions.
Article
Electrochemistry
Chao Peng, Shuai Hou, Lan Yuan, Yi Liu, Fen Guo
Summary: "By using Ni as template for electrodeposition and subsequent galvanic replacement of Pd, a self-supporting and shell-core Pd-Ni@Ni nanowire arrays (NAs) catalytic electrode was prepared to address the high onset potential and gaseous product generation in carbohydrazide (CHZ) electrooxidation on pure Ni catalyst. The introduction of Pd with minute mass loadings of 2.7-5.3 μg cm(-2)achieved a negative shift of onset potential of CHZ electrooxidation by 320 mV regardless of Ni supports. Pd in Ni@Pd-Ni NAs electrode facilitated the chemical dissociation of CHZ into N2H4 and/or H-2, leading to side reactions such as N2H4 and/or H-2 electrooxidation. A direct CHZ fuel cell with Ni@Pd-Ni NAs anode exhibited an open circuit voltage of 1.05 V and a peak power density of 22.90 mV cm(-2)at 303 K operating temperature."
Article
Nanoscience & Nanotechnology
Yang Li, Yichang Yan, Yanping He, Shangfeng Du
Summary: The excellent performance and safety of direct formic acid fuel cells (DFAFCs) make them potential power sources for portable electronic devices. However, their real application is still challenging due to the complex fabrication of catalyst electrodes and poor power performance. In this study, a new gas diffusion electrode (GDE) with ultrathin PtCu alloy nanowire arrays grown on the carbon paper gas diffusion layer is demonstrated. The introduction of Cu in PtCu NWs enhances the direct oxidation pathway for formic acid and improves the power density of the GDE.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Chemistry, Physical
Rudy Crisafulli, Dryade Ferreira de Paula, Sabrina C. Zignani, Lorenzo Spadaro, Alessandra Palella, Simona Boninelli, Jose A. Dias, Jose J. Linares
Summary: Using liquid fuels in fuel cells has advantages in terms of easier and safer handling, transportation, and storage. This study investigates the influence of copper as an auxiliary metal on palladium in direct hydrazine fuel cells. The addition of copper reduces the adsorption energies of adsorbed species and contributes to the oxidation of hydrazine, resulting in improved electroactivity. However, copper also slightly promotes the non-faradaic decomposition of hydrazine, leading to a slight loss in faradaic efficiency.
Article
Chemistry, Physical
Kirti Mishra, Nishu Devi, Samarjeet Singh Siwal, Vijay Kumar Thakur
Summary: The article discusses the role of electrode catalysts in fuel cells and the research progress on the use of metal/polymer-based nanomaterials with different morphologies and fabrication methods as anode catalysts. It also explores the application of noble and non-noble metal catalysts in fuel cell technology and the relationship between catalyst morphology, synthesis, and composition.
APPLIED CATALYSIS B-ENVIRONMENT AND ENERGY
(2023)
Article
Chemistry, Multidisciplinary
Gaoqiang Yang, Siddharth Komini Babu, Wipula P. R. Liyanage, Ulises Martinez, Dmitri Routkevitch, Rangachary Mukundan, Rodney L. Borup, David A. Cullen, Jacob S. Spendelow
Summary: This work presents a new catalyst/electrode architecture that eliminates the primary degradation mechanisms in conventional electrodes, enabling improved durability and faster mass transport. The unique coaxial nanowire electrode (CANE) design increases platinum utilization and eliminates the need for carbon support and ionomer binder. Fuel cell membrane electrode assemblies based on CANEs demonstrate extraordinary durability and high power density, enabling the rapid deployment of fuel cells in various clean energy applications.
ADVANCED MATERIALS
(2023)
Article
Polymer Science
Somia Awad, Houda Kaouach, Mahmoud A. A. Mohammed, Esam E. E. Abdel-Hady, Wael M. M. Mohammed
Summary: In this study, an attempt was made to improve direct alcohol fuel cells (DAFC) by replacing platinum with cheaper materials. Nickel acetate-silver nitrate supported by carbon nanofibers with different concentrations of silver were synthesized and characterized. The synthesized catalysts showed good nanofiber morphology and the presence of nickel and silver nanoparticles. Electrochemical measurements demonstrated that the catalyst with a 90-10% ratio of nickel to silver exhibited the best electro-oxidation activity for both methanol and ethanol. This research provides a promising approach to replace platinum in DAFCs with a bimetallic Ni-Ag/CNFs catalyst.
POLYMERS FOR ADVANCED TECHNOLOGIES
(2023)
Article
Energy & Fuels
Hamed Izadi, Majid Baghdadi, Maryam Pazoki
Summary: In this study, hydrothermal catalytic upgrading of crude tire oil was conducted using Pd/Al2O3/Fe3O4 catalyst, effectively reducing sulfur and oxygen content and increasing the high heating value. The process optimization using Central Composite Design method improved the yield and quality of the produced fuel.
Article
Electrochemistry
Abdul Qayoom Mugheri, Shaista Khan, Ali Asghar Sangah, Aijaz Ahmed Bhutto, Muhammad Younis Laghari, Nadeem Ahmed Mugheri, Asif Ali Jamali, Arsalan Ahmed Mugheri, Nagji Sodho, Abdul Waheed Mastoi, Aftab Kandhro
Summary: Green hydrogen has the potential to transition to a pollution-free energy infrastructure. This study proposes a solution to produce hydrogen during the photoelectrochemical process, offering greater stability and control over chemical reactions. Techno-economic assessments show the efficiency and economic feasibility of co-producing value-added chemicals to enhance green hydrogen production.
ELECTROCHIMICA ACTA
(2024)
Article
Electrochemistry
Danpeng Cheng, Wuxin Sha, Qigao Han, Shun Tang, Jun Zhong, Jinqiao Du, Jie Tian, Yuan-Cheng Cao
Summary: LiNixCoyMn1-x-yO2 (NCM) is a critical cathode material for lithium-ion batteries in electric vehicles. The aging of cathode/electrolyte interfaces leads to capacity degradation and long-term cycle instability. A novel neural network model called ACGNet is developed to predict electrochemical stability windows of crystals, allowing for high-throughput screening of coating materials. LiPO3 is identified as a promising coating material with high oxidation voltage and low cost, which significantly improves the cycle stability of NCM batteries. This study demonstrates the accuracy and potential of machine learning in battery materials.
ELECTROCHIMICA ACTA
(2024)
Article
Electrochemistry
P. Mohana, R. Yuvakkumar, G. Ravi, S. Arunmetha
Summary: This study successfully fabricates a non-noble CuO/NiO/rGO nanocomposite and investigates its electrocatalytic performance for oxygen evolution reaction in alkaline environment. The experimental results demonstrate that the electrocatalyst exhibits high activity and good stability, offering a new synthetic approach for sustainable energy production.
ELECTROCHIMICA ACTA
(2024)
Article
Electrochemistry
Qiong Qu, Jing Guo, Hongyu Wang, Kai Zhang, Jingde Li
Summary: In this study, a bifunctional electrode host design consisting of carbon nanofibers implanted ordered porous Co-decorated Al2O3 supported on carbon nanotube film (CNTF) was proposed to address the shuttling effect of lithium polysulfides (LiPSs) and dendrite formation of metal lithium anode in lithium-sulfur (Li-S) batteries. The electrode exhibited excellent conductivity, efficient confinement of LiPSs, and catalytic conversion performance, resulting in high initial capacity and good capacity retention during cycling. As an anode, the electrode showed excellent Li+ diffusion performance and uniform lithium growth behavior, achieving a dendrite-free lithium electrode. The flexible pack cell assembled from these electrodes delivered a specific capacity of 972 mAh g(-1) with good capacity retention.
ELECTROCHIMICA ACTA
(2024)
Article
Electrochemistry
Hong Zhang, Jin-Peng Yu, Chen Chen, Cheng-Yong Shu, Guang-Yu Xu, Jie Ren, Kai Cui, Wen-Fang Cai, Yun-Hai Wang, Kun Guo
Summary: Spray coating of acetylene black nanoparticles onto stainless steel mesh can enhance its biofilm formation ability and current density, making it a promising electrode material for microbial electrochemical systems. The spray coating method is simple, cost-effective, and suitable for large-size stainless steel electrodes.
ELECTROCHIMICA ACTA
(2024)
Article
Electrochemistry
Binpeng Hou, Jingjin Chen, Li-Hong Zhang, Xiaowen Shi, Zizhong Zhu
Summary: The electrochemical performance of Li1.20Mn0.44Ni0.32Co0.04O2 and its oxygen-deficient phase Li1.20Mn0.44Ni0.32Co0.04O1.83 was studied through first-principles calculations. The results show that the oxygen-deficient phase has a higher theoretical capacity but lower voltage platform and higher chemical activity compared to the pristine phase.
ELECTROCHIMICA ACTA
(2024)
Article
Electrochemistry
Yating Du, Sayoko Shironita, Daisuke Asakura, Eiji Hosono, Yoshitsugu Sone, Yugo Miseki, Eiichi Kobayashi, Minoru Umeda
Summary: This study investigates the effect of high- and low-temperature environments on the charge-discharge performance of a Li-ion battery. The deterioration mechanisms of the battery at different temperatures are analyzed through various characterization techniques. The results indicate that the battery performance deteriorates more significantly at a low-temperature environment of 5 degrees C compared to higher temperatures. The understanding of the deterioration mechanisms can contribute to the development of safer battery usage methods.
ELECTROCHIMICA ACTA
(2024)
Article
Electrochemistry
Si-Si Shi, Zhi-Xiang Yuan, Fei Zhang, Ping Chen
Summary: In this study, a new nano-electrocatalyst was prepared, which exhibited superior electrocatalytic activity for the reduction of NO2- to ammonia in a neutral electrolyte, potentially due to the synergistic enhancement between Co3O4-x and Co.
ELECTROCHIMICA ACTA
(2024)
Article
Electrochemistry
Berna Dalkiran, Havva Bekirog
Summary: This study reports the use of deep eutectic solvents (DES) based on ethylene glycol and urea as low-cost and green electrolytes for enhancing electrochemical detection of natural antioxidants. The study successfully developed a disposable and effective electrochemical sensing platform for simultaneous determination of ascorbic acid (AA) and gallic acid (GA) using NaOH nanorods on a pencil graphite electrode. The proposed electrode showed improved analytical performance, with higher peak currents and shifted oxidation potentials in DES compared to BR buffer medium.
ELECTROCHIMICA ACTA
(2024)
Article
Electrochemistry
Sijun Ren, Jianguo Huang
Summary: In this study, a novel bio-inspired nanofibrous WO3/carbon composite was synthesized using a facile hydrothermal method. The three-dimensional network structure of the composite alleviated the volume expansion of WO3 nanorods and enhanced the charge-transport kinetics. The optimized composite exhibited superior lithium storage properties.
ELECTROCHIMICA ACTA
(2024)
Article
Electrochemistry
Zhilong Zheng, Yu Chen, Hongxia Yin, Hengbo Xiao, Xiangji Zhou, Zhiwen Li, Ximin Li, Jin Chen, Songliu Yuan, Junjie Guo, Haibin Yu, Zhen Zhang, Lihua Qian
Summary: This study found that interstitial Zn cations in CoMoO4 can modulate the dissolution kinetics of Mo cations and improve the OER performance. The interstitial Zn cations can prevent the dissolution of Co cations at high potential, enhancing the durability of the catalyst.
ELECTROCHIMICA ACTA
(2024)
Article
Electrochemistry
Xiaobo Lin, Shern R. Tee, Debra J. Searles, Peter T. Cummings
Summary: Molecular dynamics simulations using the constant potential method were used to investigate the charging dynamics and charge storage of supercapacitors. The simulations revealed that the water-in-salt electrolyte exhibited the highest charge storage and significantly higher capacitance on the negative electrode. The varying contributions of different electrode regions to supercapacitor performance were also demonstrated.
ELECTROCHIMICA ACTA
(2024)
Article
Electrochemistry
Wiktoria Lipinska, Vita Saska, Katarzyna Siuzdak, Jakub Karczewski, Karol Zaleski, Emerson Coy, Anne de Poulpiquet, Ievgen Mazurenko, Elisabeth Lojou
Summary: The spatial distribution of enzymes on electrodes is important for bioelectrocatalysis. In this study, controlled spatial distribution of gold nanoparticles on Ti nanodimples was achieved. The efficiency of enzymatic O2 reduction was found to be influenced by the size of the gold nanoparticles and their colocalization with TiO2. The highest stability of enzymatic current was observed with the largest gold nanoparticles.
ELECTROCHIMICA ACTA
(2024)
Article
Electrochemistry
Tariq M. Al-Hejri, Zeenat A. Shaikh, Ahmed H. Al-Naggar, Siddheshwar D. Raut, Tabassum Siddiqui, Hamdan M. Danamah, Vijaykumar V. Jadhav, Abdullah M. Al-Enizi, Rajaram S. Mane
Summary: This study explores a promising self-growth approach for the synthesis of nickel hydroxide (Ni(OH)2) nanosponge-balls on the surface of a nickel-foam (NiF) electrode. The modified NiF electrode, named Ni(OH)2@NiF, shows distinctive nanosponge-ball morphology and demonstrates excellent energy storage capability and electrocatalytic performance in both hydrogen and oxygen evolution reactions.
ELECTROCHIMICA ACTA
(2024)
Article
Electrochemistry
Rafael Del Olmo, Gregorio Guzman-Gonzalez, Oihane Sanz, Maria Forsyth, Nerea Casado
Summary: The use of Lithium-Ion Batteries (LIBs) is becoming increasingly extensive, and it is important to optimize the devices to achieve their maximum practical specific capacity. In this study, mixed ionic-electronic conducting (MIEC) binders based on PEDOT:PSS and PEDOT: PDADMA-TFSI were developed for Li-ion cathodes, and their performance was compared with conventional formulations. The influence of electrode formulations, including the addition of conducting carbon and an Organic Ionic Plastic Cristal (OIPC), was also analyzed. The proposed binders showed improved performance compared to conventional formulations with different electrolyte types and active materials.
ELECTROCHIMICA ACTA
(2024)