Article
Chemistry, Multidisciplinary
Aoxue Huang, Roxanna S. Delima, Yongwook Kim, Eric W. Lees, Fraser G. L. Parlane, David J. Dvorak, Michael B. Rooney, Ryan P. Jansonius, Arthur G. Fink, Zishuai Zhang, Curtis P. Berlinguette
Summary: This study reports a method for direct hydrogenation of O(2) gas to form H2O2 using a membrane reactor without H-2 gas. Hydrogen is obtained from water source and the reactor is powered by electricity. The concentration of H(2)O(2) can be increased about 8 times by optimizing the ratio of methanol-to-water in the chemical chamber and through catalyst design. The study also demonstrates the sensitivity of H(2)O(2) concentration to its decomposition rate, which can be minimized using AuPd alloy catalysts.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2022)
Article
Multidisciplinary Sciences
Hong-chao Li, Qiang Wan, Congcong Du, Jiafei Zhao, Fumin Li, Ying Zhang, Yanping Zheng, Mingshu Chen, Kelvin H. L. Zhang, Jianyu Huang, Gang Fu, Sen Lin, Xiaoqing Huang, Haifeng Xiong
Summary: This study develops a two-step approach to prepare PdSn nanowire catalysts, which exhibit superior reactivity and high producibility in the synthesis of H2O2.
NATURE COMMUNICATIONS
(2022)
Article
Chemistry, Physical
Lyudmila B. Belykh, Nikita I. Skripov, Tatyana P. Sterenchuk, Elena A. Milenkaya, Tatyana A. Kornaukhova, Fedor K. Schmidt
Summary: The behavior of palladium-phosphorus catalysts on a Na-ZSM-5 zeolite support in the direct synthesis of hydrogen peroxide under mild conditions was studied. Elemental phosphorus was found to enhance the activity and selectivity of Pd catalysts for H2O2 synthesis. The P:Pd ratio showed a direct relationship with the catalysts' activity. The influence of phosphorus on the properties of palladium catalysts in side reactions and the chemical and phase composition of Pd-P particles were investigated.
APPLIED CATALYSIS A-GENERAL
(2023)
Article
Chemistry, Physical
Vanitha Reddy Naina, Sheng Wang, Dmitry Sharapa, Michael Zimmermann, Martin Haehsler, Lukas Niebl-Eibenstein, Junjun Wang, Christof Woell, Yuemin Wang, Sanjay Kumar Singh, Felix Studt, Silke Behrens
Summary: This study explores the catalytic performance of Pd nanocrystals doped with Pb in direct H2O2 synthesis. It is found that Pd3Pb cubes outperform other shapes of Pd3Pb nanocrystals and monometallic Pd catalysts in catalytic efficiency. DFT calculations and surface studies reveal that the electronic modification and lack of larger Pd ensembles in Pd3Pb cubes contribute to their superior catalytic activity in H2O2 synthesis.
Article
Chemistry, Multidisciplinary
Shahram Shaybanizadeh, Rafael Luque, Alireza Najafi Chermahini
Summary: In this study, Pd and Au nanoparticles were successfully decorated on boron nitride nanosheets using the impregnation method. The catalytic performance of Pd-0.05-Au-0.10/BNNSs in H2O2 generation was significantly improved compared to monometallic and other bimetallic catalysts.
Article
Chemistry, Physical
Joseph Brehm, Richard J. Lewis, David J. Morgan, Thomas E. Davies, Graham J. Hutchings
Summary: The direct synthesis of H2O2 from molecular H-2 and O-2 over AuPd catalysts supported on TiO2 was investigated, showing that the Au:Pd ratio and metal loading have a significant impact on catalytic activity towards H2O2 formation. Additionally, the combination of relatively small nanoparticles with mixed Pd-oxidation state was found to enhance catalytic performance.
Article
Chemistry, Physical
Alexandra Barnes, Richard J. Lewis, David J. Morgan, Thomas E. Davies, Graham J. Hutchings
Summary: The introduction of low concentrations of copper can enhance the catalytic activity of AuPd nanoparticles towards the synthesis of H2O2, but a higher loading of copper inhibits the performance. Electronic modification and structural changes are the main factors improving the catalyst performance.
Article
Chemistry, Physical
Pranjali Priyadarshini, Tomas Ricciardulli, Jason S. Adams, Yang Sik Yun, David W. Flaherty
Summary: The study investigates the impact of sodium bromide on the formation of H2O2 on Pd nanoparticle catalysts, revealing that sodium bromide can increase steady-state H2O2 selectivities without the need for additional liquid-phase bromide for at least 15 hours.
JOURNAL OF CATALYSIS
(2021)
Article
Chemistry, Applied
Min Woo Lee, Deok Yeon Jo, Geun-Ho Han, Kwan-Young Lee
Summary: The study observed that the hydrogen peroxide selectivity of Pd/SiO2 and PdBrx/SiO2 catalysts increased with the bromine content. Density functional theory calculations confirmed that the adsorption of bromine adjusted the reaction barrier on the Pd catalyst surface, improving the selectivity of hydrogen peroxide.
Review
Chemistry, Physical
Geun-Ho Han, Seok-Ho Lee, Seong-Yeon Hwang, Kwan-Young Lee
Summary: Hydrogen peroxide is a simple oxidizing agent with growing use due to its environmental friendliness. The traditional method of manufacturing H2O2 through anthraquinone autoxidation (AO process) releases large amounts of organic solvents and requires significant energy. Direct synthesis of hydrogen peroxide (DSHP) offers a more sustainable solution, but faces challenges such as mass-transfer limitations and side reactions, requiring advanced technologies for catalyst development.
ADVANCED ENERGY MATERIALS
(2021)
Article
Engineering, Environmental
Zaiyong Yang, Zengxi Wei, Shunxin Zhou, Bo Bao, Shuangliang Zhao, Fuzhong Gong
Summary: This study reports a new continuous DSHP process by constructing a feasible microreactor upon microfluidic chip under ambient condition, which achieved continuous production of H2O2 with high concentration. The study provides a promising on-site route to produce H2O2 in a green, safe yet ready-to-use process.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Engineering, Chemical
Wenqiang Wang, Wenjuan Xue, Fan Yang, Jian Li, Lei Nie, Hongliang Huang, Chongli Zhong
Summary: In this study, a series of isostructural aluminum-based metal-organic frameworks (MOFs) with tunable polarities were used as supports for Pd nanoparticles. The polarity of the ligands in the MOFs was found to play a critical role in the catalytic activity and selectivity of direct hydrogen peroxide synthesis. The highest H2O2 yield was achieved with Pd@A520, which was approximately 4.9 times higher than that of commercial Pd/C. Quantitative relationships were established between the ligand polarity of MOFs and various catalytic properties.
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2023)
Article
Chemistry, Physical
Meijia Zhang, Haoxiang Xu, Yibin Luo, Jiqin Zhu, Daojian Cheng
Summary: This study investigates the addition of non-noble metal W to enhance the synthesis of H2O2 using PdAu-based catalysts. The catalyst with pre-loading of W followed by PdAu showed the best performance, with strong interaction between W and PdAu being the key to the enhanced catalytic performance. However, excessive addition of W reduced the synthesis of H2O2.
CATALYSIS SCIENCE & TECHNOLOGY
(2022)
Article
Chemistry, Physical
Wei Tian, Yonggang Dong, Hong Qin, Ziming Luo, Qian Lin, Zheng Chen, Hongyan Pan, Yongyong Shi, Keliang Wang
Summary: This work reports the synthesis of bimetallic catalyst PdSn@Pd@HCS by adapting reversed-phase micellar and galvanic replacement reaction, which exhibits excellent catalytic performance with H2O2 selectivity of 98% and productivity of 4899 mmol/g(Pd)·h(-1). The presence of Sn in the bimetallic alloy enhances the ligand effect and optimizes the electronic structure of the surface Pd atoms, resulting in the enhancement of H2O2 selectivity and productivity. This work provides the groundwork for bimetallic yolk-shell structure catalysts to achieve efficient synthesis of H2O2.
MOLECULAR CATALYSIS
(2023)
Article
Chemistry, Physical
Alexandra Barnes, Richard J. Lewis, David J. Morgan, Thomas E. Davies, Graham J. Hutchings
Summary: The addition of small quantities of tertiary base metals into supported AuPd nanoparticles can greatly enhance the catalytic performance towards the direct synthesis of H2O2, with Ni in particular resulting in significantly higher initial rates of H2O2 synthesis without significant contribution from competitive degradation reactions.
CATALYSIS SCIENCE & TECHNOLOGY
(2022)
Review
Polymer Science
Taegyun Kwon, Jinyoung Chun
Article
Materials Science, Multidisciplinary
Jongkook Hwang, Jin Hyung Lee, Jinyoung Chun
Summary: The study introduced a facile synthetic method to prepare spherical mesoporous silica nanoparticles with tunable mesopores, utilizing acetic acid and PEG as key components to control the particle size and morphology.
Article
Chemistry, Physical
Jiwoong Oh, Jooyoung Jang, Eunho Lim, Changshin Jo, Jinyoung Chun
Summary: NCF/rGO nanocomposites were successfully fabricated via a simple method and exhibited high reversible capacity and cyclability as cathodes for Li-ion batteries. The NCF nanoclusters played a key role in providing efficient ion diffusion and rapid electron transfer, contributing to the enhanced electrochemical performance.
Article
Green & Sustainable Science & Technology
Hyun Jin Jung, Hyun Kwak, Jinyoung Chun, Kyeong Keun Oh
Summary: By optimizing the parameters of the alkaline fractionation process, simultaneous removal of hemicellulose and ash from rice husk was achieved, resulting in high cellulose content in the solid residue and enhanced hemicellulosic sugar recovery in the liquid fraction. Additionally, nano-structured silica was successfully synthesized using the black liquor by-product, while high value-added cellulose nanofibers were produced through two-stage bleaching and colloid milling processes.
Article
Green & Sustainable Science & Technology
Ji Yeon Park, Yang Mo Gu, Seon Young Park, Ee Taek Hwang, Byoung-In Sang, Jinyoung Chun, Jin Hyung Lee
Summary: An improved silica extraction process from rice husk was developed using a two-stage continuous method, involving attrition ball milling and alkaline leaching. The optimum conditions for the continuous process were determined through investigations on alkaline leaching parameters. NaOH was found to yield slightly more silica compared to KOH. The two-stage continuous extraction process operated stably for 80 hours with an 89% silica yield, with the optimal conditions of 0.2 M reaction concentration, 80 degrees C temperature, 3 hours duration time, and 6% (w/v) solid content.
Article
Chemistry, Physical
Jiwoong Oh, Eunho Lim, Jinyoung Chun, Changshin Jo
Summary: The NiF2/porous carbon (NPC) nanocomposites were successfully synthesized using an ammonium fluoride (NH4F) treatment, with lower toxicity and higher yield compared to traditional methods. These materials exhibit outstanding initial reversible capacity and rate performance as cathode materials for LIBs, potentially advancing the use of metal fluorides in these batteries.
JOURNAL OF POWER SOURCES
(2022)
Article
Chemistry, Physical
Ju-Won Lee, Kwon-Hyung Lee, Seong-Sun Lee, David B. Ahn, Jinyoung Chun, Seo Hui Kang, Kwang Chul Roh, Sang-Young Lee
Summary: We have developed on-demand solid-state microsupercapacitors (MSCs) with ultrahigh energy density using direct-ink-writing (DIW) printing technology. These MSCs have microscale features, arbitrary form factors, and ionic isolation between unit cells, allowing electrochemical tailoring of voltages and capacitances. The resulting MSCs exhibit high energy density and artistic versatility.
ENERGY STORAGE MATERIALS
(2022)
Article
Chemistry, Physical
Tae-Gyun Kwon, Hayoung Park, Oong Hyeon Jo, Jinyoung Chun, Beom-Goo Kang
Summary: A facile method for preparing magnetite-incorporated polyacrylonitrile-derived carbon composites was developed for lithium-ion batteries (LIBs). The composites showed increased specific capacities and stable cycle performance, making them a promising material for high-power LIBs.
ACS APPLIED ENERGY MATERIALS
(2022)
Article
Chemistry, Multidisciplinary
Ji Yeon Park, Wonsik Mun, Jinyoung Chun, Byoung-In Sang, Robert J. Mitchell, Jin Hyung Lee
Summary: The preparation method of natural biogenic silica nanoparticles from rice husks affects their biocompatibility, with alkali extraction method resulting in the lowest toxicity. Incorporating polyethylene glycol before alkali extraction increases their toxicity, while the presence of residual carbon and variations in calcination temperature and time also impact their toxicity.
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
(2022)
Article
Chemistry, Multidisciplinary
Hyeon Park, Ho-Jeong Chae, Young-Woong Suh, Young -Min Chung, Myung-June Park
Summary: A model for the bioethanol-to-jet fuel process was developed to analyze its techno-economics and CO2 emissions. The study found that the process had low profitability but was environmentally friendly.
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
(2022)
Article
Chemistry, Physical
Seonggyu Lee, M. R. Ashwin Kishore, Dongkyu Kim, Hari Kang, Jinyoung Chun, Lee Seul Oh, Jong Hyeok Park, Hyung Ju Kim, Jong Suk Yoo, Eunho Lim
Summary: Promoting OER activity through direct O-O coupling at interfacial active sites is an attractive strategy for high energy efficiency water electrolysis technology.
ACS APPLIED ENERGY MATERIALS
(2022)
Article
Chemistry, Physical
Xuan Tin Tran, Viet Le Nam Vo, Young -Min Chung
Summary: By incorporating a hydrophobic linker and subsequent pyrolysis, the H2O2 selectivity of Pd/UiO-66 catalyst can be effectively improved. The linker makes the catalyst's external surface hydrophobic, thereby preventing H2O2 from reapproaching the active sites. Subsequent pyrolysis further enhances the H2O2 selectivity, but at the expense of decreased H2 conversion.
MOLECULAR CATALYSIS
(2022)
Article
Chemistry, Physical
Nguyen Thi Kim Chau, Young -Min Chung
Summary: Mesoporous FeNi-1,3,5-benzenetricarboxylates (FeNi-BTCs) with different Fe/Ni ratios were prepared and their catalytic activities in ethylene oligomerization were evaluated. The FeNi-BTC catalyst with Fe/Ni = 10/90 showed improved textural properties and exhibited higher ethylene consumption rate and C-6-C-8 oligomer selectivity compared to Ni-BTC. The enhanced performance of Fe10Ni90-BTC catalyst was attributed to its well-defined mesoporous structure, which facilitated intrapore ethylene diffusion.
MOLECULAR CATALYSIS
(2023)
Article
Chemistry, Physical
Hayoung Park, Il-Seop Jang, Bo-Ye Song, Yun Chan Kang, Seongseop Kim, Jinyoung Chun
Summary: Conversion-type metal fluoride cathodes, including cobalt fluoride, have promising potential for electrochemical applications. However, their high energy-density is challenging due to inherent properties and synthesis issues. This study successfully develops a facile synthesis method for CoF2 nanocomposites, which exhibit improved reversible capacities and superior rate capabilities. In addition, the adoption of surface protection strategies prevents capacity fading, resulting in a long cycle life. This research promotes the development of advanced metal fluoride cathodes with high energy densities and long cycle lives.
JOURNAL OF MATERIALS CHEMISTRY A
(2023)
Article
Chemistry, Multidisciplinary
Seongseop Kim, Ji Yeon Park, Yang Mo Gu, Il-Seop Jang, Hayoung Park, Kyeong Keun Oh, Jin Hyung Lee, Jinyoung Chun
Summary: A method for obtaining size-controlled spherical silica from rice husk using an eco-friendly and simplified process has been developed. The silica particles obtained were uniformly spherical in shape and had a surface area of more than 200 m²/g. The use of polyethylene glycol additives during the precipitation step and temperature adjustment allowed for control of the size of the silica particles.
NANOSCALE ADVANCES
(2021)
