Article
Chemistry, Physical
Riyi Chen, Songsheng Zheng, Yudong Yao, Zhibin Lin, Wei Ouyang, Lianghui Zhuo, Zhaolin Wang
Summary: Through investigating the performance of a direct ammonia fuel cell, it was found that the PtIr/C alloy catalyst achieved the highest peak power density and open-circuit voltage, but also showed a correlation between ammonia permeation and cathode catalyst degradation.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Chemistry, Physical
Fangfang Ren, Zhiqing Zhang, Zhengyun Liang, Qian Shen, Yuqian Luan, Rong Xing, Zhenghao Fei, Yukou Du
Summary: In this paper, a nanofirework-like PtRu alloy catalyst was successfully synthesized and used for glycerol oxidation reaction in alkaline medium. The optimized Pt1Ru3 NFs catalyst showed improved activity and stability compared to Pt NFs, with a peak current density surpassing that of commercial Pt/C catalyst. This research provides important guidance for the design of advanced anode electrocatalysts for fuel cells.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2022)
Article
Electrochemistry
Ahmed H. Ali, Peter G. Pickup
Summary: This study investigates the effect of Pt coverage on the electrochemical oxidation of ethanol and methanol, and shows that adding a Pt shell improves catalytic activity while increasing limiting currents and shifting product distribution towards CO2, enhancing hydrogen production efficiency.
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
(2022)
Article
Energy & Fuels
Haneul Jin, Sehyun Lee, Yeonsun Sohn, Soo-Hyoung Lee, Pil Kim, Sung Jong Yoo
Summary: In direct ammonia fuel cells, the ammonia oxidation reaction is crucial but limited by the slow reaction kinetics, resulting in few available catalysts. Researchers have developed a novel synthetic method to control the formation kinetics of platinum nanocubes and achieve pristine Pt (100) catalyst for better performance in AOR and DAFCs.
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
(2021)
Article
Chemistry, Physical
Dario R. Dekel, Karam Yassin, Igal G. Rasin, Simon Brandon
Summary: Ammonia has potential as a fuel for anion-exchange membrane fuel cells (AEMFCs). However, challenges of ammonia crossover and slow ammonia oxidation reaction (AOR) need to be addressed. A one-dimensional and transient model of a direct ammonia AEMFC system was developed and applied, showing excellent agreement with experimental results. The results revealed a positive impact of ammonia crossover on cell longevity, reducing the degradation rate of ionomeric material, but further studies are needed to determine the desired rate of crossover and its influence on cost-effectiveness.
JOURNAL OF POWER SOURCES
(2023)
Article
Chemistry, Physical
Susmita Singh, Moupiya Ghosh, Mainak Bose, Sinthia Saha, Anushna Dutta
Summary: The composition and atomic structure of nanoalloy electrocatalysts are crucial for the ethanol oxidation reaction. This study explores the relationship between the composition, structure, and catalytic activity of PtRu electrocatalysts and proposes a new perspective for the development of C/PtRu electrocatalysts for direct ethanol fuel cells.
Article
Chemistry, Physical
Hau Quoc Pham, Tai Thien Huynh, Toan Minh Pham, Van Thi Thanh Ho
Summary: The Pt3Ru nanoparticles supported on anatase Ti0.7W0.3O2 displayed excellent electrocatalytic activity towards alcohol oxidation, with low onset potentials and high mass activities compared to commercial Pt/C catalysts. After durability tests, the Pt3Ru (NPs)/Ti0.7W0.3O2 catalyst showed significantly enhanced CO-tolerance and maintained a higher mass activity compared to Pt/C catalysts. This was attributed to the synergistic effect between the bimetallic nanoalloy and the mesoporous Ti0.7W0.3O2 nanosupport, as well as the superior anti-corrosion properties of the TiO2-based nanosupport under harsh conditions.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Chemistry, Multidisciplinary
Sisi Liu, Yuzhuo Jiang, Mengfan Wang, Yunfei Huan, Yanzheng He, Qiyang Cheng, Yu Cheng, Jie Liu, Xi Zhou, Tao Qian, Chenglin Yan
Summary: By introducing single-atom Ni-doping, the inert (220) surface of PtMo nano-alloy is activated as an additional active facet in addition to (200). The Ni triggers electron accumulation around Pt sites at the (220) facet, reducing the energy barrier for electrocatalytic ammonia oxidation reaction (AOR) and maintaining the activity of the (200) surface. The Ni-decorated PtMo catalyst exhibits significantly improved AOR kinetics and the DAFC equipped with this catalyst achieves a remarkable peak power density of 16.70 mW cm(-2) at low temperatures.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Chemistry, Physical
Shi He, Yufeng Chen, Mengdi Wang, Hanggai Nuomin, Peter Novello, Xueqian Li, Siyuan Zhu, Jie Liu
Summary: Ammonia is a promising hydrogen mediator that reduces the cost of hydrogen transportation, but improvements are needed for extracting hydrogen. Ammonia electrolysis is a convenient method for low-cost hydrogen production. Nickel-cobalt nitride nanosheets show high electrocatalytic activity for the ammonia oxidation reaction in non-aqueous solutions.
Article
Chemistry, Physical
Qijun Wang, Ya-Wei Zhou, Zhao Jin, Chunguang Chen, Hong Li, Wen-Bin Cai
Summary: This study reports a facile aqueous phase approach using DMAB to synthesize PtRu/C nanoalloy, with significantly improved structural parameters and enhanced electrocatalytic performance. The PtRu/C(DMAB) shows the highest methanol electro-oxidation performance among all tested samples, making it a promising alternative for efficient anode electrocatalysts in DMFCs.
Article
Chemistry, Physical
Huihuang Fang, Chen Liao, Yiran Ying, Jinxing Cheng, Qiuxiang Wang, Haitao Huang, Yu Luo, Lilong Jiang
Summary: Low-temperature direct ammonia fuel cell (DAFC) faces challenges due to kinetically sluggish ammonia oxidation reaction (AOR). This study explores non-oxide-based metal-metal carbide interfaces as catalysts for AOR. Pt/WC and PtIr/WC catalysts show significantly higher peak current densities compared to carbon-supported catalysts. Experimental and theoretical studies reveal the role of charge transfer and adsorption energies. PtIr-WC/CNT achieves a compelling peak power density of 140.0 mW cm-2 in a DAFC test, outperforming previously reported catalysts.
JOURNAL OF CATALYSIS
(2023)
Article
Materials Science, Multidisciplinary
Hyunki Kim, Seokjin Hong, Hedam Kim, Yeji Jun, Soo Young Kim, Sang Hyun Ahn
Summary: This review discusses the importance and application prospects of ammonia oxidation reaction (AOR), and highlights the recent progress and strategies in electrical ammonia oxidation electrodes based on the AOR mechanism. Although the AOR mechanism remains unclear, most studies have focused on Pt catalysts.
APPLIED MATERIALS TODAY
(2022)
Article
Chemistry, Physical
Yuanjun Liu, Longkun Zuo, Yuyu Liu, Yiru Wu, Xingmei Guo, Junhao Zhang, Fu Cao, Xiangjun Zheng, Guoxing Zhu
Summary: In this study, PtRu alloy electrocatalyst with small size and network-like structure was synthesized by a solution phase reduction route. The presence of Ru optimized the hydrogen bonding energy on Pt sites and provided functional surface for the adsorption of OH species. The ultrathin size of the alloy units significantly enhanced the catalytic activity for alkaline HOR.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Review
Engineering, Environmental
Nurhafizah Mohd Selihin, Meng Guan Tay
Summary: The future of wastewater treatment technologies focuses on processing efficiency and economic benefits, with advanced oxidation processes playing a crucial role. This paper reviews various wastewater treatment technologies and their interactions with pollutants, providing comparisons for technology selection based on specific circumstances.
WATER SCIENCE AND TECHNOLOGY
(2022)
Article
Chemistry, Physical
Yun Liu, Zhefei Pan, Oladapo Christopher Esan, Xiaoyu Huo, Xingyi Shi, Liang An
Summary: In this work, a new passive ammonia fuel cell prototype is designed and tested. The developed ammonia fuel cell features a passive supply of ammonia to the anode and an open cathode design. The performance and behavior of the fuel cell are investigated under different operating conditions, as well as the influence of structural parameters on mass transport and performance.
JOURNAL OF POWER SOURCES
(2023)
Article
Chemistry, Physical
Mariana Lima, Camila M. Godoi, Monique C. L. Santos, Julio Nandenha, Almir O. Neto, Rodrigo F. B. De Souza
Summary: The conversion of CO2 is of great importance in reducing greenhouse gas emissions. This study explores the transformation of CO2 into higher value-added compounds using a unique device. The results demonstrate that the copper-carbon electrocatalyst is capable of generating various compounds, contributing new findings to the field.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Chemistry, Physical
Ju Wang, Martin Couillard, Elena A. Baranova
Summary: Electrochemical promotion of catalysis (EPOC) is a promising method for controlling and enhancing the reverse water gas shift reaction (RWGS), converting CO2 into CO. This study demonstrates that copper nanoparticles (Cu NPs) exhibit better catalytic activity and EPOC compared to other non-noble metals. Characterization confirms the change in oxidation state of the copper catalyst, with Cu2O and metallic copper identified as the active states. EPOC only occurs under positive polarizations and shows significant variation under different reaction conditions.
CATALYSIS SCIENCE & TECHNOLOGY
(2022)
Article
Chemistry, Physical
Rodrigo F. B. de Souza, Daniel Z. Florio, Ermete Antolini, Almir O. Neto
Summary: This work reviews the utilization of fuel cells for the simultaneous generation of electricity and valuable chemicals through the partial oxidation of methane.
Review
Biotechnology & Applied Microbiology
Emily Cossar, Frederic Murphy, Elena A. Baranova
Summary: This review summarizes the recent research and development of active Ni-based anodes for AEMWE devices, focusing on lab synthesized Ni particle-based anode catalytic layers with AEIs since 2015. The synthesis and electrode fabrication method are analyzed to assess the feasibility of large-scale AEMWE. The impact of ionomeric binders, including type and loading, on catalytic performance is also discussed.
JOURNAL OF CHEMICAL TECHNOLOGY AND BIOTECHNOLOGY
(2022)
Article
Chemistry, Multidisciplinary
Luis M. S. Garcia, Priscilla J. Zambiazi, Khaoula Chair, Tuan Duy Doan, Andrezza S. Ramos, Julio Nandenha, Rodrigo F. B. De Souza, Larissa Otubo, Adam Duong, Almir O. Neto
Summary: This study investigates the ideal relationship between the nanostructure of a palladium complex and carbon to obtain a stable, conductive, and functional reagent diffusion electrode for the partial oxidation of methane to methanol. The results suggest that a 20% mass concentration of the palladium complex supported on carbon is the most active, exhibiting lower open-circuit and power density but higher efficiency in methanol production.
Article
Electrochemistry
Luiz Otavio Orzari, Monica Helena Marcon Teixeira Assumpc, Julio Nandenha, Almir Oliveira Neto, Luiz Humberto Marcolino Junior, Marcio Bergamini, Bruno Campos Janegitz
Summary: This manuscript describes the investigation of multifunctional synthesis, characterization, and application of Pd, Ag and Bi-carbon black supported electrocatalysts in fuel cells and electrochemical sensors. The materials were characterized through morphological and electrochemical techniques to better understand their properties for proposed applications. It was found that the Pd50Ag45Bi05/C composite exhibited attractive ethanol catalysis behavior and could be used for dopamine determination.
ELECTROCHIMICA ACTA
(2022)
Article
Chemistry, Physical
Vitoria Pistori Guimaraes, Julio Nandenha, Luiz Otavio Orzari, Orlando Fatibello-Filho, Almir Oliveira Neto, Bruno Campos Janegitz, Fernando Campanha Vicentini, Monica Helena Marcon Teixeira Assumpcao
Summary: This study investigates the use of Pd nanoparticles supported on physical mixtures of Vulcan carbon and TiO2 in different ratios. The presence of TiO2 promotes formate oxidation, and the proportion of 75:25 of carbon and TiO2 shows the highest efficiency.
Article
Electrochemistry
Victoria A. Maia, Camila M. G. Santos, Nathalia F. B. Azeredo, Priscilla J. Zambiazi, Ermete Antolini, Almir O. Neto, Rodrigo F. B. de Souza
Summary: The electrochemical conversion of N2 to NH3 using a polymeric electrolyte reactor is an efficient method for green hydrogen production. In this study, a Cu/C catalyst was used in a polymeric electrolyte membrane reactor for ammonia production by nitrogen reduction. The catalyst was characterized and the results showed the presence of CuO2 and carbon phases, as well as high agglomeration of copper nanoparticles. Mass spectroscopy analysis revealed the production of N2H2 and NH3 with a maximum ammonia yield rate of 38.4 mu g h-1 cm-2 and a faradaic efficiency of 42.57%.
ELECTROCHEMISTRY COMMUNICATIONS
(2023)
Article
Chemistry, Physical
Ju Wang, Martin Couillard, Elena A. Baranova
Summary: In this study, Cu/Co3O4 catalysts were investigated for the reverse water gas shift (RWGS) reaction. It was found that loading 4 wt.% Cu nanoparticles on Co3O4 improved its electrocatalytic performance. The changes in the active oxidation states of Cu and Co caused by O2- migration under polarization were confirmed by XPS, XRD, and cyclic voltammetry (CV). The study also demonstrated that the exchange current density (i(0)) could serve as an informative tool for predicting the catalytic rate in the instance of RWGS reaction.
Article
Biotechnology & Applied Microbiology
Rafael Garduno, Elena Baranova, Chris Kinsley
Summary: The hydrogen production potential in dark fermentation of high-strength brewery waste slurry was optimized by adjusting the operating conditions. The main end product was butyric acid, accounting for over 50% of the carboxylic acids. Dark fermentation followed by anaerobic digestion is a promising method for treating brewery sludge, with increased energy potential and reduced CO2 emissions.
JOURNAL OF CHEMICAL TECHNOLOGY AND BIOTECHNOLOGY
(2023)
Article
Chemistry, Physical
Tatiana Morin Caamano, Mohamed S. E. Houache, Mario G. Sandoval, Martin Couillard, Arnaud Weck, Elena. A. Baranova, Yaser Abu-Lebdeh
Summary: The novelty of dinitrile-based electrolytes for CO2ER application is explored. The effects of secondary nitrile group addition and the length of the aliphatic, nonpolar chain on salt solubility, electrolyte conductivity, and CO2 solubility were studied using acetonitrile, adiponitrile, and sebaconitrile. Electrochemical effects were evaluated using cyclic voltammetry (CV) and chronoamperometry (CA) measurements with copper (Cu) and copper oxide (CuO) catalysts. Density functional theory (DFT) calculations were employed to explore CO2 interactions with the solvents. It was found that tuning the polarity of the nitrile solvent greatly affects the physiochemical properties of the electrolyte solutions, especially CO2 solubility and CO2ER.
JOURNAL OF PHYSICAL CHEMISTRY C
(2023)
Article
Electrochemistry
James W. W. Sturman, Chae-Ho Yim, Zouina Karkar, Elena A. A. Baranova, Mathieu Toupin, Yaser Abu-Lebdeh
Summary: The use of nature-derived biopolymers such as NaCMC and XG as binders in silicon-based anodes for lithium-ion batteries offers advantages over traditional binders such as PVDF. This study compares the electrochemical performance of NaCMC and XG-based silicon electrodes with a low binder content, and investigates the Si-binder interactions and their role in electrode performance using XPS, SEM, and EDX.
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
(2023)
Article
Energy & Fuels
James W. Sturman, Eloi Grignon, Bryony T. McAllister, Chae-Ho Yim, Elena A. Baranova, Dwight S. Seferos, Yaser Abu-Lebdeh
Summary: In this study, a novel small molecule azaacene (SmAz) was synthesized and its electrochemical performance as an anode material in Li-ion batteries was investigated. The results show that SmAz exhibits a reversible capacity of around 550 mA h g(-1) at 50 mA g(-1), which exceeds its theoretical capacity. The activation process and charge storage mechanism of SmAz were also explored, providing insights into the behavior of organic electrodes and potential design features for their improvement.
Article
Chemistry, Multidisciplinary
Bruno D. Q. Villardi, Nivaldo G. P. Filho, Paulo V. R. Gomes, Julio Nandenha, Camila M. Godoi, Thais Lie Tagomori, Nathalia Azeredo, Rodrigo F. B. de Souza, Almir O. Neto, Priscilla J. Zambiazi
Summary: Fuel cells can convert biomass into electricity, and platinum catalysts show higher activity in the oxidation of sugars.
REVISTA VIRTUAL DE QUIMICA
(2023)
Review
Green & Sustainable Science & Technology
Hilal Al-Salih, Mohamed Seif Eddine Houache, Elena A. Baranova, Yaser Abu-Lebdeh
Summary: To promote the widespread use of electric vehicles, it is crucial to increase the energy density of batteries while keeping the cost low. Solid-state lithium batteries are considered promising candidates for the next generation of electric vehicles due to their safety and high energy density. However, the development of these batteries is hindered by challenges such as the resistive interface between the electrode and electrolyte. One approach to address this challenge is by using composite cathodes (CCs) that incorporate solid ionic conductors. This article provides an overview of different types of catholytes used in CCs and the common techniques for fabricating them. It also discusses the relationship between the microstructure and design parameters of CCs and the electrochemical performance of solid-state batteries, as well as the methods used to measure their transport properties. Finally, general guidelines for CC research are outlined.
ADVANCED ENERGY AND SUSTAINABILITY RESEARCH
(2022)
