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, Physical
Sreya Roy Chowdhury, Jagdish C. Bhangoji, T. Maiyalagan, Suresh S. Shendage
Summary: The ternary Al-Mg-Ag alloy is introduced as a novel support material and active promoter for palladium nano catalyst. The Pd nanoparticles supported on this alloy show remarkable catalytic activity for ethanol oxidation reaction in alkali, with high peak current density and excellent stability for long-term application as anode catalyst for fuel cells.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Chemistry, Physical
Meiling Wang, Jin Zhao, Jinjin Wang, Yuzhu Tian, Zhizhu Yue, Li Wan, Dong Li, Tianjun Hu, Jianfeng Jia
Summary: In this study, a WO3 decorated Pd/C nanocomposite was prepared using a simple microwave irradiation method. The electrochemical tests showed that the Pd-WO3/C composite exhibited better electrocatalytic performance for ethanol oxidation compared to the commercial Pd/C catalyst. The stronger electronic coupling between Pd and WO3 and the modification of electron density on the Pd surface were identified as the reasons for the enhanced performance.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Engineering, Environmental
Chang Liu, Xinwei Wen, Lin Ge, Yuxi Chen, Jiajie Wu, Qing Qu, Lei Li
Summary: This study demonstrates the use of alloying Rh and Ru to Pt catalysts to improve the activity and stability of direct ethanol fuel cells (DEFCs). By applying the composition engineering strategy, PtxRhRu catalysts were designed and synthesized. The results showed improved activity and stability, highlighting the importance of material design in practical DEFC applications.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Chemistry, Multidisciplinary
Adewale K. Ipadeola, Ahmed Abdelgawad, Belal Salah, Aboubakr M. Abdullah, Kamel Eid
Summary: This study presents a simple, aqueous-phase, one-step, and ultrafast approach for the interfacial engineering of surfactant-free porous PdM (M = Cu, Au, and Mn) nanocrystals. The PdCu nanocrystals exhibit excellent alkaline electrochemical ethanol oxidation reaction (EOR) activity and stability, providing a new direction for improving the EOR performance of palladium-based catalysts.
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)
Article
Chemistry, Physical
Ghada M. Abdelrazek, Mohamed A. Sayed, Mohamed M. EL-Deeb, Ahmed A. Farghali, Abdalla Abdelwahab
Summary: In this study, carbon xerogels derived from resorcinol and formaldehyde monomers were successfully prepared and functionalized with transition metals and transition metal dichalcogenides. The MoS2/CX/NF electro-catalyst exhibited outstanding electrocatalytic performance for methanol oxidation reaction with high current density and long-term stability. The unique nanocoil structure of MoS2 increased mesoporosity and active surface area, providing sufficient electrical conductive channels and pathways for electrons.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Nanoscience & Nanotechnology
Shenglan He, Yue Liu, Hongjian Li, Qianbao Wu, Dongsheng Ma, Daojiang Gao, Jian Bi, Yaoyue Yang, Chunhua Cui
Summary: A highly active ethanol oxidation electrocatalyst was developed by decorating Mo sites on Pd nanosheets, increasing current density and achieving nearly 100% faradic efficiency for ethanol-to-acetate conversion without CO2 generation. This selective and CO2-free conversion offers a promising strategy for alcohol fuel cells to provide comparable current density and for the selective oxidation of biofuels to useful acetate intermediates.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Green & Sustainable Science & Technology
V. B. Kumar, D. Kashyap, H. Teller, M. G. Gebru, A. Gedanken, A. Schechter
Summary: This study investigates the electro-oxidation of methyl formate (MF) and dimethyl ether (DME) on a ternary catalyst supported on CNT-NCDs, showing high catalytic activity and stability. The ternary catalyst exhibited peak oxidation currents of 75 mA/mg for DME and 365 mA/mg for MF, with significant improvements over other catalysts tested.
MATERIALS TODAY SUSTAINABILITY
(2022)
Article
Chemistry, Multidisciplinary
Maryam Yaldagard, Mehrdard Shahbaz, Hyoun Woo Kim, Sang Sub Kim
Summary: In this study, graphene nanoplates (GNPs) coated with sulfated zirconium dioxide (ZrO2) were used as support for platinum (Pt) catalysts in direct ethanol fuel cells (DEFCs). The Pt/S-ZrO2-GNP electrocatalyst showed higher electrocatalytic activity and carbon monoxide (CO) tolerance compared to unsulfated counterparts. The new material also exhibited increased ethanol oxidation activity and reaction kinetics. The study suggests that sulfonating is a practical approach for improving the performance of electrocatalysts in DEFCs.
Article
Chemistry, Multidisciplinary
Zhenyu Li, Jiefei Li, Zexuan Zheng, Kunhong Jiang, Tianrun Zheng, Dongmin Wang, Hang Wei, Zhiming Shi, Xiaotian Li, Haibin Chu
Summary: In this study, CeO2·xH2O nanoparticles were used as a support material for the catalyst, and the presence of hydroxyl groups and oxygen vacancies significantly enhanced the catalytic activity and stability of Pd for ethanol oxidation reaction.
SCIENCE CHINA-CHEMISTRY
(2022)
Article
Multidisciplinary Sciences
Yajun Qiu, Jian Zhang, Jing Jin, Jiaqiang Sun, Haolin Tang, Qingqing Chen, Zedong Zhang, Wenming Sun, Ge Meng, Qi Xu, Youqi Zhu, Aijuan Han, Lin Gu, Dingsheng Wang, Yadong Li
Summary: The construction of Pd-Zn dual sites significantly improves the efficiency of ethanol electro-oxidation, exceeding commercial Pd/C by approximately 24 times. Further computational studies reveal that Pd-Zn dual sites promote the adsorption of ethanol and hydroxide ion, optimizing the electro-oxidation pathway.
NATURE COMMUNICATIONS
(2021)
Article
Chemistry, Physical
Ajay Munde, Balaji B. Mulik, Parag P. Chavan, Vijay S. Sapner, Shankar S. Narwade, Shivsharan M. Mali, Bhaskar R. Sathe
Summary: The study presents a surface modification approach for the fabrication of noble metal-free cobalt-bismuth bimetallic electrocatalysts for enhanced ethanol oxidation reaction. The synthesized Co-Bi@rGO electrocatalysts exhibit high activity, cost-effectiveness, efficiency, and durability, showing superior performance compared to individual counterparts. The synergistic interactions of rGO, Co, and Bi in the electrocatalysts contribute to their enhanced performance in the ethanol oxidation reaction.
JOURNAL OF PHYSICAL CHEMISTRY C
(2021)
Article
Chemistry, Physical
Jianyu Chen, Min Yang, Mingyuan Pang, Fahui Gao, Peizhi Guo
Summary: The study synthesized alloyed PdxAg1 nanoparticles via a solvothermal synthesis approach and found that the optimized Pd(14)Ag1 NPs exhibited excellent current activity in ethanol oxidation reaction, 3.3 times higher than commercial Pd/C counterpart. Additionally, Pd14Ag1 NPs showed better antitoxicity, lower reaction barrier, and better long-term stability compared to other PdAg NPs and commercial Pd/C catalysts.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2021)
Article
Chemistry, Physical
Tukai Singha, Smruti Medha Mishra, Tapas Kumar Chini, Biswarup Satpati
Summary: This article introduces a maximum strain strategy based on Au@Pd core-shell nanobipyramids, which enhances the surface adsorption of ethanol through strain-induced electronic effect, thereby improving the efficiency of the ethanol oxidation reaction, the anode reaction of direct ethanol fuel cells (DEFCs).
APPLIED SURFACE SCIENCE
(2022)
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)