Article
Chemistry, Physical
Zhenhui Li, Xiaoxuan Zhang, Jinyi Chen, Xing Fang, Wenying Yuan, Junxia Yu, Xinhong Qiu
Summary: The powdered layered double hydroxide (LDH) synthesized by hydrothermal coprecipitation was compounded with sodium alginate to form microspheres (LDH-AL). The characterizations of the LDH-AL show that the microspheres were successfully prepared. The immobilization experiments of hexavalent chromium (Cr(VI)) demonstrated the effectiveness of LDH-AL microspheres in the immobilization of Cr(VI) in soil.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2023)
Article
Chemistry, Physical
Tengfei Zhang, Feng He, Jianling Zhang, Fangna Gu
Summary: Ultra-thin NiZrAl layered double hydroxide (LDH) nanosheets were synthesized as catalyst precursors for CO2 methanation. The NiZrAl-LDH-AMO-R catalyst exhibited higher catalytic activity, higher H-2 and CO2 chemisorption capacity, and lower activation energy compared to NiZrAl-LDH-R, leading to a steady CO2 conversion of about 92.3% during the 100 h-lifetime test.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Chemistry, Multidisciplinary
Kai Wu, Qing Ye, Lanyang Wang, Fanwei Meng, Hongxing Dai
Summary: A novel kind of CO2 solid adsorbents was prepared by loading layered double hydroxides (LDH) on mesoporous alumina (MA) support. The LDHs were evenly distributed on the surface of MA, resulting in improved CO2 adsorption performance through chemical adsorption and storage of CO2 in the form of carbonate. This new adsorbent has great potential in CO2 adsorption applications.
JOURNAL OF CO2 UTILIZATION
(2022)
Article
Energy & Fuels
Yezeng He, Didi Liu, Houqiang Zhao, Jiemei Wang, Yanwei Sui, Jiqiu Qi, Zheng Chen, Ping Zhang, Changjiu Chen, Dongdong Zhuang
Summary: The study successfully prepared C/NiMn-LDH/Ni3S2 electrode material, which maintained a high capacitance even after 5000 cycles, and the two-electrode device assembled with activated carbon showed excellent specific energy.
JOURNAL OF ENERGY STORAGE
(2021)
Article
Chemistry, Physical
Sadegh Askari, Davide Mariotti, Paul Brunet, Alexander Vahl, Jan Benedikt
Summary: The hybrid Zn-air and Zn-M battery with Fe-doped Ni double hydroxide nanoflakes and activated carbon cathode material shows superior performance, high energy density, exceptional energy conversion efficiency, and outstanding power density. It also enables high-rate charging due to rapid redox reaction kinetics and excellent cathode materials catalytic activity.
MATERIALS TODAY ENERGY
(2021)
Article
Chemistry, Multidisciplinary
Jiaqing Zhao, Xiangdong Guo, Run Shi, Geoffrey I. N. Waterhouse, Xuerui Zhang, Qing Dai, Tierui Zhang
Summary: A series of alumina-supported NixFey nanoalloy catalysts were synthesized and used for photothermal synergistic dry reforming of methane (DRM). The Ni3Fe1 nanoalloy catalyst showed a significantly higher syngas production rate under photothermal conditions compared to dark conditions. The localized surface plasmon resonance of the Ni3Fe1 nanoalloy greatly enhanced the activation of methane, leading to a remarkable reduction in reaction temperature. The nanoalloy-based photothermal synergistic DRM demonstrated sunlight-driven feasibility and continuous operational stability for 20 hours.
ADVANCED FUNCTIONAL MATERIALS
(2022)
Article
Chemistry, Physical
Masatoshi Sakai, Haruo Imagawa, Naoki Baba
Summary: Ni-based catalysts prepared using LDH as precursors show porous structures with highly dispersed Ni-metal nanoparticles, and the addition of Mg and Ca enhances the catalyst's activity and CO2 adsorption capacity.
APPLIED CATALYSIS A-GENERAL
(2022)
Article
Chemistry, Physical
Lixiao Yang, Bo Qiao, Siqi Zhang, Huiqin Yao, Zidan Cai, Yanbo Han, Cheng Li, Yongliang Li, Shulan Ma
Summary: We report the first example of MgAl layered double hydroxide intercalated with salicylaldoxime (SALDH) which exhibits excellent uranium (U(VI)) capture performance.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2023)
Article
Multidisciplinary Sciences
Luo Yu, Jiayong Xiao, Chuqiang Huang, Jianqing Zhou, Ming Qiu, Ying Yu, Zhifeng Ren, Ching-Wu Chu, Jimmy C. Yu
Summary: Seawater electrolysis is a sustainable hydrogen production technology, but it is hindered by a lack of robust oxygen evolution reaction (OER) electrocatalysts. This study presents a multimetallic catalyst that exhibits high activity and durability in seawater electrolysis.
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
(2022)
Review
Engineering, Environmental
L. Santamaria, S. A. Korili, A. Gil
Summary: This article summarizes the challenge of curving the CO2 atmospheric levels and introduces sorption-enhanced water-gas shift (SEWGS) process as one of the most promising techniques for CO2 capture and storage. SEWGS operating settings at moderate temperature and high pressure require finding an adsorbent capable of working under these conditions. Calcined layered double hydroxides (LDH) have been proven to be the best choice in this range of pressure/temperatures, although their performance can be further improved. The article presents a state-of-art of the research accomplished so far.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Chemistry, Physical
Yiming Huang, Zhe Liu, Arixin Bo, Xiao Tang, Wayde Martens, Liangzhi Kou, Yuantong Gu, Gabriela Carja, Huaiyong Zhu, Sarina Sarina
Summary: Highly effective and selective removal of As(V) was achieved using Mg-Al Layered Double Hydroxide modified by sulphur species (LDH-S). LDH-S exhibited an adsorption capacity for As(V) that was 715% higher than pristine LDH. The adsorbent showed high tolerance to competitive anions and demonstrated potential in continuous flow applications.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2022)
Article
Chemistry, Multidisciplinary
Jiamin Ma, Jiale Xia, Zhong Liang, Xiaoyun Chen, Yaping Du, Chun-Hua Yan
Summary: Layered double hydroxides (LDHs) are promising electrodes for supercapacitors due to their adjustable composition and superior high capacity, but their experimental specific capacity is lower than theoretical value. Intercalating large-sized anions to increase interlayer spacing is crucial for performance improvement, as demonstrated in a study where a cobalt-nickel LDH hollowcage intercalated with 1,4-benzenedicarboxylic acid showed improved specific capacity and rate performance. The sample with the largest layer spacing achieved a maximum specific capacity of 229 mA h g(-1) at 1 A g(-1), and a hybrid supercapacitor with this sample showed good energy density and cycle stability.
Article
Chemistry, Physical
Zhihao Liu, Xinhua Gao, Bo Liu, Wenlong Song, Qingxiang Ma, Tian-sheng Zhao, Xu Wang, Jong Wook Bae, Xingjun Zhang, Jianli Zhang
Summary: A series of layered Co-Al-O catalysts were prepared via a hydrothermal method and reduced at different temperatures. The results showed that the Co-0 content and basic sites on the catalysts increased and then decreased with the reduction temperature, leading to effective hydrogen dissociation and CO2 adsorption. The CoAl-O-600 catalyst exhibited superior performance in CO2 methanation at low temperature and showed excellent resistance to coking and sintering.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2022)
Article
Chemistry, Inorganic & Nuclear
Ikuo Yanase, Kouhei Hayashizaki, Masaki Kakiage, Hiroaki Takeda
Summary: Terbium-substituted layered double hydroxides (NO3-LDH) were synthesized using a hydrothermal method, which showed green photoluminescence as CO3-LDH under a CO2 gas flow containing water vapor. The fluorescence intensity of CO3-LDH increased with CO2 absorption time and concentration, with a greater bandgap compared to NO3-LDH.
INORGANIC CHEMISTRY COMMUNICATIONS
(2021)
Article
Chemistry, Physical
Libo Wu, Luo Yu, Qiancheng Zhu, Brian McElhenny, Fanghao Zhang, Chunzheng Wu, Xinxin Xing, Jiming Bao, Shuo Chen, Zhifeng Ren
Summary: A novel hierarchical nanosheet-nanoflake-structured B-Co2Fe LDH catalyst has been developed with excellent OER catalytic activity, stability, and corrosion resistance in seawater electrolysis, showing promising potential for selective seawater oxidation.
Article
Chemistry, Physical
Junyoung Cha, Taeho Lee, Yu-Jin Lee, Hyangsoo Jeong, Young Suk Jo, Yongmin Kim, Suk Woo Nam, Jonghee Han, Ki Bong Lee, Chang Won Yoon, Hyuntae Sohn
Summary: The study investigated the preparation method and catalytic performance of nanometer-sized Ru particles deposited on four different alkali-exchanged zeolite Y supports. The results showed that Ru/Rb-Y exhibited the highest catalytic activity, mainly attributed to the high basicity of Rb-Y zeolite and the confined dispersion of Ru particles, which led to an open pore structure of the zeolite.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2021)
Article
Energy & Fuels
Jun Woo Park, Yunju Cho, Seungwoo Son, Sunghwan Kim, Ki Bong Lee
Summary: FT-ICR MS was used to analyze SARA fractions in heavy oils, particularly focusing on the structure of asphaltenes. Through categorizing the asphaltenes based on heteroatom classes, different trends in DBE distribution were observed. The compositional space of DBE and carbon number was divided into four groups based on relative abundance peaks, representing different structural types of asphaltenes.
Article
Engineering, Environmental
Xiangzhou Yuan, Manu Suvarna, Sean Low, Pavani Dulanja Dissanayake, Ki Bong Lee, Jie Li, Xiaonan Wang, Yong Sik Ok
Summary: Researchers analyzed the adsorption characteristics and composition of biomass waste-derived porous carbons (BWDPCs) through machine learning and found that the gradient boosting decision trees (GBDT) model performed the best in prediction, showing high accuracy in CO2 adsorption.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2021)
Article
Chemistry, Multidisciplinary
Tae Ho Lee, Sungyong Mun, Sung Hyun Kim, Ki Bong Lee
Summary: The study analyzed the products obtained from the catalytic reaction of jet fuels using model compounds MCH and n-dodecane under supercritical conditions. While fuel conversion and gas yield were proportional to the n-dodecane fraction, the rate of reduction in relative yields of aromatic hydrocarbons was slower for blended fuels compared to pure fuels, showing no significant correlation with fuel composition.
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
(2021)
Article
Materials Science, Multidisciplinary
Jae Won Lee, Seok Min Hong, Ju Ho Lee, Yung Zun Cho
Summary: Hydrophobic aluminosilicate aerogels containing silver were prepared through sol-gel processes using specific solvents and treatment methods, with high silver content and low surface area. Aerogels modified with hexamethyldisilazane exhibited high iodine adsorption capacity, large surface area, and pore volume.
JOURNAL OF NUCLEAR MATERIALS
(2021)
Article
Chemistry, Analytical
Seok-Min Hong, Hong Jang, Siwan Noh, Hyun Woo Kang, Yung-Zun Cho
Summary: The study focuses on the management of radioactive carbon from spent nuclear fuel through a double alkali method, evaluating the effects of operating conditions on CO2 absorption performance. Causticization with Ca(OH)2 leads to the immobilization of absorbed carbon into a stable structure suitable for geological repository.
JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY
(2021)
Article
Green & Sustainable Science & Technology
Chan Hyun Lee, Suji Kim, Hyung Jin Yoon, Chang Won Yoon, Ki Bong Lee
Summary: With the increasing interest in environmentally-friendly energy processes, research has focused on producing hydrogen as an alternative energy carrier via catalytic reaction processes. Studies on the water gas shift (WGS) reaction have led to the development of novel catalysts with excellent activities at low temperatures. Cu-MgAlH, a hydrotalcite-based catalyst with a MgAl2O4 spinel structure, showed the highest redox property and excellent catalytic performance in WGS reactions between 250 and 400 degrees Celsius.
RENEWABLE & SUSTAINABLE ENERGY REVIEWS
(2021)
Article
Environmental Sciences
Hee-Gon Kim, Keunsu Choi, Kibong Lee, Soonjae Lee, Kyung-Won Jung, Jae-Woo Choi
Summary: The research found that the maximum adsorption capacities of UiO-66 and UIO-66-NH2 were 93.6 and 76.5 mg/g, respectively, with the TC adsorption capacity of UiO-66-NH2 being lower than that of UiO-66. Density functional theory calculations revealed that the -NH2 functional group could weaken the structural robustness of UiO-66-NH2, causing a reduction in TC adsorption capacity.
Article
Energy & Fuels
Dahye Song, Unho Jung, Hyo Been Im, Tae Ho Lee, Young-Eun Kim, Ki Bong Lee, Kee Young Koo
Summary: The study found that loading highly dispersed Ru on Ni/MgAl2O4 catalyst can enhance methane conversion in DRM reaction, with Ru(D)/Ni(I)/MgAl2O4 catalyst showing the best performance in terms of high metal dispersion and CO2 desorption. Additionally, minimal coke deposition was observed during stability tests.
ENERGY SOURCES PART A-RECOVERY UTILIZATION AND ENVIRONMENTAL EFFECTS
(2022)
Review
Green & Sustainable Science & Technology
Shuangjun Li, Xiangzhou Yuan, Shuai Deng, Li Zhao, Ki Bong Lee
Summary: CO2 adsorption capture technology using biomass-derived materials is considered a cost-effective and environmentally friendly method for mitigating climate change. From a thermodynamic perspective, this method is preferred and feasible for commercial-scale applications.
RENEWABLE & SUSTAINABLE ENERGY REVIEWS
(2021)
Review
Green & Sustainable Science & Technology
Qingyin Li, Xiangzhou Yuan, Xun Hu, Erik Meers, Hwai Chyuan Ong, Wei-Hsin Chen, Peigao Duan, Shicheng Zhang, Ki Bong Lee, Yong Sik Ok
Summary: Liquefaction is an attractive technology for converting biomass into bio-oil without drying the feedstock, and is conducted at relatively low temperatures. Co-liquefaction of different biomass feedstocks can enhance the liquefaction degree and chemical properties of the resulting bio-oil. Understanding the interaction during co-liquefaction process is important for tuning the chemical species and yield of the bio-oil. Operational parameters and mixing ratios of different biomasses also play a significant role in the co-liquefaction behavior.
RENEWABLE & SUSTAINABLE ENERGY REVIEWS
(2022)
Article
Chemistry, Physical
Da Hye Song, Un Ho Jung, Young Eun Kim, Hyo Been Im, Tae Ho Lee, Ki Bong Lee, Kee Young Koo
Summary: The dependence of catalytic activity and coke resistance of Ni-based catalysts on the support type was investigated in the dry reforming of methane. It was found that Ni/Al2O3 and Ni/MgO catalysts formed corresponding solid solutions, while MgO-Al2O3 and MgAl2O4 supports suppressed the formation of solid solutions. Ni/MgO-Al2O3 and Ni/MgAl2O4 catalysts showed higher methane conversion rates compared to other catalysts. Moreover, catalysts with higher alkaline-earth metal content exhibited better coke resistance.
Article
Chemistry, Physical
Seok Hwan Yang, Wonsang Jung, Hyeonggeon Lee, Sang-Hun Shin, Seung Jae Lee, Min Suc Cha, Woong Choi, Seong-Geun Oh, Ki Bong Lee, Ung Lee, Da Hye Won, Jang Yong Lee
Summary: This study demonstrates the commercial viability of a polycarbazole-based anion-conducting material, HQPC-tmIM, as an anion exchange membrane for electrochemical CO2 reduction (eCO2R). The research also reveals through simulation that the well-constructed membrane morphology of HQPC-tmIM leads to outstanding membrane conductivity and enables high CO partial current density. The findings provide guidelines for developing commercially viable anion exchange membranes and ionomers for eCO2R.
ACS ENERGY LETTERS
(2023)
Article
Chemistry, Physical
Seok Hwan Yang, Wonsang Jung, Hyeonggeon Lee, Sang-Hun Shin, Seung Jae Lee, Min Suc Cha, Woong Choi, Seong-Geun Oh, Ki Bong Lee, Ung Lee, Da Hye Won, Jang Yong Lee
Summary: This study demonstrates the key roles of HQPC-tmIM, a polycarbazole-based anion-conducting material, in electrochemical CO2 reduction (eCO2R) and reveals its commercial viability as an anion exchange membrane (AEM). The superior performance of HQPC-tmIM in terms of mechanical/chemical stability and CO partial current density (jCO) in a membrane electrode assembly electrolyzer (MEA) was shown compared to a commercial AEM (Sustainion). The multiphysics model simulation reveals that the well-constructed membrane morphology of HQPC-tmIM enables high jCO through facilitated charge transfer.
ACS ENERGY LETTERS
(2023)
Article
Chemistry, Multidisciplinary
Suji Kim, Hyung Jin Yoon, Chan Hyun Lee, Ki Bong Lee
Summary: CO2 capture using solid-based adsorbents at high temperatures, particularly hydrotalcite with a high Mg/Al molar ratio, holds promise for addressing global warming and climate change. The melting behavior of NaNO3 at different temperatures affects CO2 sorption kinetics and uptake.
JOURNAL OF CO2 UTILIZATION
(2023)
