Review
Chemistry, Multidisciplinary
Ramakrishna Chava, D. Bhaskar Anurag Varma, Banasri Roy, Srinivas Appari
Summary: This article discusses the application of perovskite oxide catalysts in CO2 reforming, focusing on their structural stability, activity, and carbon deposition. The exsolved perovskite catalysts are considered as potential alternatives to conventional catalysts, offering better stability and activity.
JOURNAL OF CO2 UTILIZATION
(2022)
Article
Chemistry, Physical
Yang Song, Hyunmin Kim, Ji-Hyun Jang, Wenjun Bai, Caichao Ye, Jiamin Gu, Yunfei Bu
Summary: This study presents a novel electro-catalyst composed of Pt3Ni alloy nanoparticles exsolved on oxygen-deficient perovskite oxides. The research explores the atomic-scale mechanisms and demonstrates the formation of a core-shell structure during water electrolysis, enhancing the electrochemical performance and operational durability.
ADVANCED ENERGY MATERIALS
(2023)
Review
Chemistry, Multidisciplinary
Kai Wang, Chen Han, Zongping Shao, Jieshan Qiu, Shaobin Wang, Shaomin Liu
Summary: This review comprehensively elaborates the advances of perovskite oxides in advanced oxidation processes (AOPs) for water remediation, providing insights into their performance, structure, and tuning methods. Strategies for designing novel perovskite oxides to enhance catalytic activities in AOPs have been highlighted.
ADVANCED FUNCTIONAL MATERIALS
(2021)
Article
Chemistry, Multidisciplinary
Yunxiang Tang, Tingting Zhao, Hecheng Han, Zhengyi Yang, Jiurong Liu, Xiaodong Wen, Fenglong Wang
Summary: This study reports the synthesis of Ir-CoO/Al2O3 catalysts for photo-thermal CO2 methanation, which exhibit high methane productivity. Mechanism studies reveal that CoO nanoparticles act as photocatalysts for electron donation to Ir nanoparticles and as nano-heaters to enhance the local temperature around the active sites, thereby promoting the adsorption, activation, and conversion of reactant molecules. The dual functions of photothermal semiconductors as photocatalysts and nano-heaters provide new insight into the development of efficient photo-thermal catalysts.
Article
Chemistry, Physical
Hyun Suk Lim, Minbeom Lee, Yikyeom Kim, Dohyung Kang, Jae W. Lee
Summary: This work introduces LaCo1-xNixO3 perovskite catalysts for enhancing the low temperature performance of reverse water-gas shift reaction. By incorporating Ni to lower the interaction between La-site and B-site, the catalysts achieved control over CO2 conversion and CO selectivity, ultimately maximizing RWGS activity.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Energy & Fuels
Dragos Neagu, J. T. S. Irvine, Jiayue Wang, Bilge Yildiz, Alexander K. Opitz, Juergen Fleig, Yuhao Wang, Jiapeng Liu, Longyun Shen, Francesco Ciucci, Brian A. Rosen, Yongchun Xiao, Kui Xie, Guangming Yang, Zongping Shao, Yubo Zhang, Jakob Reinke, Travis A. Schmauss, Scott A. Barnett, Roelf Maring, Vasileios Kyriakou, Usman Mushtaq, Mihalis N. Tsampas, Youdong Kim, Ryan O'Hayre, Alfonso J. Carrillo, Thomas Ruh, Lorenz Lindenthal, Florian Schrenk, Christoph Rameshan, Evangelos I. Papaioannou, Kalliopi Kousi, Ian S. Metcalfe, Xiaoxiang Xu, Gang Liu
Summary: In the past decade, exsolution has become a powerful method for decorating oxide supports with dispersed nanoparticles for energy and catalytic applications. Exsolved nanoparticles have set new standards in terms of activity, durability, and functionality, due to their exceptional anchorage and ability to be produced, transformed, and applied in various ways. When combined with multifunctional supports like perovskite oxides, exsolution becomes a promising platform for advanced energy materials. This review discusses the current status of exsolution and explores future research directions for its application.
JOURNAL OF PHYSICS-ENERGY
(2023)
Article
Chemistry, Multidisciplinary
Jun Zhou, Zihe Zhu, Qinghao Li, Qiankai Zhang, Zhengrong Liu, Qinyuan Deng, Zilin Zhou, Cunxin Li, Lei Fu, Jiacheng Zhou, Haonan Li, Kai Wu
Summary: Metal-semiconductor heterostructured catalysts have received great attention for their unique interfacial characteristics and superior catalytic performance. This study presents a simple method for the exsolution of alloying FeNi3 nanoparticles in a metal-semiconductor heterostructure through dielectric blocking discharge plasma. The resulting FeNi3 -CTNF catalyst exhibits outstanding catalytic activity for the photothermal reverse water gas shift reaction, with a significantly higher CO yield and selectivity compared to pure CaTiO3. The superior catalytic activity is attributed to several factors, including the narrow band gap, photogenerated electron migration, and abundant surface oxygen vacancies. This work provides insights into the development of metal-semiconductor heterostructured catalysts for photothermal CO2 reduction.
Article
Chemistry, Physical
L. Lindenthal, J. Popovic, R. Rameshan, J. Huber, F. Schrenk, T. Ruh, A. Nenning, S. Loeffler, A. K. Opitz, C. Rameshan
Summary: The study investigated the exsolution capabilities of six perovskite materials and their performance in rWGS. Nanoparticle exsolution significantly enhanced the rWGS activity. Additionally, it was shown that nanoparticles formed due to exsolution are stable at high reaction temperatures.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2021)
Article
Chemistry, Multidisciplinary
Min Xu, Chencheng Liu, Aaron B. Naden, Herbert Fruechtl, Michael Buehl, John T. S. Irvine
Summary: The in situ formation of bi-metallic nanoparticles on B-site co-doped perovskite fibers is investigated. These fibers exhibit a high degree of exsolution, with NiCo or Ni3Fe bi-metallic nanoparticles with average diameters of 29 nm and 35 nm respectively. These perovskite fibers are used as cathode materials in pure CO2 electrolysis cells and show improved performance after in situ electrochemical switching.
Review
Chemistry, Physical
Hamidreza Arandiyan, Putla Sudarsanam, Suresh K. Bhargava, Adam F. Lee, Karen Wilson
Summary: Biomass is a renewable energy source that is being increasingly utilized due to concerns about climate change caused by fossil fuel consumption. Waste biomass-derived fuels and chemicals offer a solution to reduce reliance on fossil fuels and achieve "Net Zero 2050 CO2 emissions" with environmental, health, and economic benefits. This review focuses on the use of perovskite oxide catalysts for biomass valorization, discussing their structure-reactivity relationships in various reactions. The study highlights the prospects and challenges for the broader application of perovskite oxide catalysts in biomass valorization.
Review
Chemistry, Multidisciplinary
Chenyang Tang, Kalliopi Kousi, Dragos Neagu, Ian S. Metcalfe
Summary: Exsolution method for supported bimetallic nanoparticles has gained increasing attention due to the high stability and potential to control key particle properties.
CHEMISTRY-A EUROPEAN JOURNAL
(2021)
Article
Engineering, Environmental
Min Li, Ziwei Li, Qian Lin, Jianxin Cao, Fei Liu, Sibudjing Kawi
Summary: This review compares and analyzes different synthesis methods for preparing CNT confined catalysts, including wet chemistry method and in situ encapsulation method, and discusses the performance and reasons of these catalysts in thermal catalysis applications. It also proposes potential challenges and perspectives in designing CNT confined catalysts.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Chemistry, Physical
Norah Alhokbany, Tansir Ahamad, Saad M. Alshehri, Jahangeer Ahmed
Summary: The nanocomposites of reduced graphene oxide supported zinc tungstate nanoparticles exhibit higher electro-catalytic performances than pure ZnWO4-NPs in alkaline media, highlighting the importance of these nanocomposites in reducing energy loss during electro-catalysis.
Article
Engineering, Electrical & Electronic
Hyunji An, Jeong-Kyu Kim, Soon-Gil Jung, Sangmo Kim, Kyeongho Na, Jiwoong Yang, Jaesun Song, Tuson Park, Chung Wung Bark, Sooran Kim, Kyung-Tae Ko, Bongjae Kim, Sanghan Lee
Summary: In complex oxides, the exsolution process, modulated by simple doping control, is demonstrated to be an efficient method for achieving tunable magnetism and nanocup morphology in perovskite ferroelectric thin films. Structural and magnetic analyses verify the reinforcement of phase-separated nanocup formation through Co and Fe codoping, resulting in the formation of the CoFe2O4 spinel ferrimagnet. Density functional theory calculations show that different doping combinations change the exsolution energies, leading to the selective formation of nanocup structures. This study presents a simple and effective methodology for engineering nanostructure and multifunctionality in nanocomposite films.
ACS APPLIED ELECTRONIC MATERIALS
(2022)
Editorial Material
Chemistry, Inorganic & Nuclear
Cyril Godard, Carmen Claver, Ana C. Albeniz
Summary: Supported catalysts offer both the activity of molecular catalysts and the convenience and reusability of catalysts in a difference phase. With continuous solutions to common problems such as leaching, supported catalysts are becoming increasingly viable for applied research.
EUROPEAN JOURNAL OF INORGANIC CHEMISTRY
(2022)
Review
Chemistry, Multidisciplinary
Jun Kyu Kim, Sangwoo Kim, Seunghyun Kim, Hyung Jun Kim, Kyeounghak Kim, WooChul Jung, Jeong Woo Han
Summary: Metal oxide surfaces undergo spontaneous reorganization during reactions, complicating the understanding of reaction mechanisms and material properties. This review categorizes the surface reorganization into three types and summarizes their effects on different reactions, providing novel insights for the design of metal-oxide-based catalytic materials.
ADVANCED MATERIALS
(2023)
Review
Chemistry, Multidisciplinary
Hyunwoo Yook, Jinwoo Hwang, Woonsuk Yeo, Jungup Bang, Jaeyoung Kim, Tae Yong Kim, Jae-Soon Choi, Jeong Woo Han
Summary: Hydroxyapatite (HAP) is a versatile green catalyst with high flexibility and multifunctionality. Various modification methods such as ionic composition change, morphology control, incorporation of other metal species, and catalytic support engineering have been explored for improving its catalytic performance. However, systematic design strategies for HAP catalysts are still lacking due to incomplete understanding of structure-activity relationships. This review discusses the methods of modulating HAP and investigates the mechanisms and effects of structural changes on catalytic performance, along with computational studies and future research directions.
ADVANCED MATERIALS
(2023)
Article
Engineering, Environmental
Sixian Yang, Xuepeng Xiang, Zuyun He, Wenye Zhong, Chenghao Jia, Zhiheng Gong, Nian Zhang, Shijun Zhao, Yan Chen
Summary: In this study, anionic defect engineering was used to activate spinel NiCo2O4 for the electrooxidation of 5-hydroxymethylfurfural (HMFOR). F-dopants were successfully introduced into NiCo2O4, leading to the formation of oxygen vacancies. These anionic defects in NiCo2O4 resulted in the expansion of crystal structure, increase in electron density, and weakened metal-O bond. The F-doped NiCo2O4 exhibited significantly higher selectivity and efficiency compared to pristine NiCo2O4, mainly due to the defect-facilitated adsorption of HMFOR. This study provides critical insights into the role of anionic defects in determining HMFOR activity and offers a strategy for synthesizing high-performance electrocatalysts for biomass electrooxidation reactions (BEOR).
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Chemistry, Multidisciplinary
Sanghyeok An, Ziang Wu, Hayoung Jeong, Juhyeok Lee, Sang Young Jeong, Wonjong Lee, Sunkyu Kim, Jeong Woo Han, Jongchul Lim, Hyojung Cha, Han Young Woo, Dae Sung Chung
Summary: This study explores the importance of hydrophilicity and backbone planarity in polymer photocatalysts, focusing on a series of benzothiadiazole-based donor-acceptor alternating copolymers with alkoxy, linear oligo(ethylene glycol) (OEG) side chains, and backbone fluorine substituents. The results show that OEG side chains improve the interaction with water and enable electron transfer to water. Additionally, fluorine substituents on the backbone produce highly ordered lamellar stacks and long-lived polarons. A new nanoparticle synthesis strategy using a methanol/water mixed solvent is also introduced, avoiding the screening effect of surfactants. The copolymer with OEG side chains and fluorine substituents achieves a high hydrogen evolution rate under visible-light irradiation. This study demonstrates the optimization of glycol side chain strategy for polymer photocatalysts.
Article
Chemistry, Physical
Woonsuk Yeo, Dongjae Shin, Moon Hyeon Kim, Jeong Woo Han
Summary: Density functional theory calculations were performed to investigate the change in Hg oxidation reactivity caused by support tuning methods, and to elucidate the change in the electronic environment at the active site. The phase control to the TiO2 support was found to improve the Hg oxidation activity, while the reduction treatment decreased the activity due to the change in charge density at V2O5. Furthermore, the interaction between the V site and surface Cl was found to critically contribute to the change in Hg oxidation reactivity.
Article
Nanoscience & Nanotechnology
Selvaraj Seenivasan, Kyu In Shim, Chaesung Lim, Thangavel Kavinkumar, Amarnath T. Sivagurunathan, Jeong Woo Han, Do-Heyoung Kim
Summary: In this study, a Ni-Co-Mo sulfide with improved pseudocapacitive charge storage mechanism is demonstrated as a promising candidate for high energy density supercapattery devices. By adding a classical Schottky junction next to the electrode-electrolyte interface, the pseudocapacitive behavior is enhanced, resulting in a specific capacity of 2,114 C g(-1) at 2 A g(-1) for the negative electrode, matching that of the positive electrode at 3 A g(-1). With the equivalent contribution from both electrodes, an energy density of 236.1 Wh kg(-1) is achieved at a power density of 921.9 W kg(-1) with a total active mass of 15 mg cm(-2).
NANO-MICRO LETTERS
(2023)
Article
Robotics
Jeong-woo Han, Soo Jeon, Hyock Ju Kwon
Summary: One way to construct a global path for a mobile robot is to extract equidistant points from obstacles in an occupancy grid map (OGM) as its backbone of thin lines (skeleton) and find an appropriate path from them. This paper introduces hierarchical topology map with explicit corridor (HTM-EC) as a new skeleton-based strategy for global path planning with path optimization.
INTELLIGENT SERVICE ROBOTICS
(2023)
Article
Chemistry, Physical
Jihyeon Lee, Byung Gwan Park, Kiheon Sung, Hyeongeon Lee, Jihun Kim, Eonu Nam, Jeong Woo Han, Kwangjin An
Summary: This study investigates the reversible hydrogenation and dehydrogenation processes in a liquid organic hydrogen carrier (LOHC) system using a single-catalyst approach. Key hydrogen-involved catalytic behaviors, such as adsorption and migration, play crucial roles in reactivity. The findings demonstrate that employing a defective metal oxide support can facilitate these behaviors at the active sites on the catalyst surface during the LOHC process.
Article
Chemistry, Multidisciplinary
Kwanyong Jeong, Sunil Kwon, Hyunwoo Yook, Jeong Jae Lee, Ju Seong Lee, Myungho Choi, Hyung Seob Lim, Sang-Joon Kim, Soo Min Kim, Jeong Woo Han, Ji Hoon Park
Summary: Liquid organic hydrogen carrier (LOHC) technology enables safe and convenient storage and transportation of hydrogen in large quantities. This study proposes a promising LOHC candidate, 1-(n-phenylethyl)naphthalene (PEN), which exhibits high hydrogen storage capacity, superior physical properties, and low cost. PEN showed reversible hydrogen storage and release performance, and the dehydrogenation performance can be enhanced by controlling the composition of stereo isomers.
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
(2023)
Article
Chemistry, Multidisciplinary
Yongjian Ye, WonJun Lee, Junxian Pan, Xiang Sun, Mengzhen Zhou, Jiahui Li, Nian Zhang, Jeong Woo Han, Yan Chen
Summary: Surface engineering is an effective strategy to promote CO2/H2O co-electrolysis for CH4 production. The introduction of a thin CeO2 layer onto the Ni-BZCYYb fuel electrode surface significantly enhances CH4 selectivity. Advanced spectroscopic techniques and density functional theory calculations reveal that the decorated CeO2 modulates reactant adsorption and facilitates proton transfer, resulting in accelerated CH4 production. These findings provide critical insights for the rational design of high-performance catalysts in other high temperature electrochemical devices.
ENERGY & ENVIRONMENTAL SCIENCE
(2023)
Article
Chemistry, Physical
Jihyeon Song, Myeong Gon Jang, Kyung-Jong Noh, Yunkyung Kim, Jeong Woo Han
Summary: We enhanced the reactivity of Pt-loaded TiO2 catalysts for the water-gas shift reaction (WGSR) by inducing TiO2 support to form nanotubes and doping with vanadium. By conducting in situ DRIFTS, XPS, pulsed reaction, and isotopic exchange experiments, we studied the reaction mechanisms and factors contributing to the increased catalytic activity. The Pt-loaded V-doped tube-shaped TiO2 catalyst showed significantly improved WGSR activity, attributed to increased surface area, better dispersion of loaded metal, and H2O dissociation ability. This study highlights the potential of modified Pt-loaded TiO2 catalysts for WGSR process and the synergistic effect of TiO2 shape control and V-doping on catalytic activity, also providing a systematic mechanism study to elucidate the impact of active factors on catalysts.
CATALYSIS SCIENCE & TECHNOLOGY
(2023)
Article
Chemistry, Physical
Woonsuk Yeo, Dongjae Shin, Moon Hyeon Kim, Jeong Woo Han
Summary: Oxidation of elemental Hg (Hg-0) is an efficient method to remove harmful Hg from coal combustion flue gas, and the development of a highly active V2O5/TiO2 catalyst is essential. Density functional theory calculations were used to investigate the effects of support tuning methods on Hg oxidation activity and electronic environment at the active site. Phase control improved activity, while reduction treatment decreased activity due to the change of charge density at V2O5.
Article
Engineering, Electrical & Electronic
Myeong Jin Seol, Seung Hwan Hwang, Jeong Woo Han, Ho Won Jang, Soo Young Kim
Summary: The demand for sensors in various fields has grown, leading to the development of materials that can be attached to the body. Halide perovskite, with its excellent optoelectrical properties, is considered suitable for sensor applications. This study examines the research trends of halide perovskites to develop different types of sensors. While research has been conducted on gas sensors, little has been done on magnetic sensors. The feasibility of implementing five senses sensors is discussed by conducting extensive research on these sensors.
ACS APPLIED ELECTRONIC MATERIALS
(2023)
Article
Chemistry, Physical
Selvaraj Seenivasan, Hyeonae Im, Taewaen Lim, Jeong Woo Han, Junhyeok Seo
Summary: This study discovers that a classical Schottky junction electrode can eliminate the non-conductive lamination of poor conductive catalysts, enhancing the activity of water splitting reactions. Specifically, the experiments demonstrate that a Schottky junction electrode formed by a nickel-tungsten nitride alloy and NiFeOOH can achieve high current densities at overpotentials of 11 mV and 181 mV, respectively.
APPLIED CATALYSIS B-ENVIRONMENT AND ENERGY
(2024)
Article
Chemistry, Applied
Seokhyun Choung, Heejae Yang, Jinuk Moon, Wongyu Park, Hyeokjoon June, Chaesung Lim, Jeong Woo Han
Summary: This study investigates how the local coordination of metal in metal-nitrogen doped carbon catalysts affects the activity and selectivity of the chlorine-evolution reaction (CER) by using density functional theory calculations and machine learning approaches. The results show that adjusting the metal's local coordination can effectively tune the CER activity and selectivity of the catalysts. The study also finds that the electronic parameters of the metal and coordination-related features play a significant role in determining the Cl binding tendencies.