Article
Nanoscience & Nanotechnology
Xin Ning, Heming Wang, Ganghua Zhou, Longyun Zhang, Yanju Yang, Jingya Sun, Xiaozhi Wang
Summary: Ni catalysts decorated with trace Rh supported on gamma-Al2O3 were prepared and investigated for the catalytic hydrodechlorination of chlorinated hydrocarbons. The introduction of Rh facilitated the generation of spillover hydrogen, enhancing the H2 activation ability of the Ni catalyst. The bimetallic Ni-Rh/gamma-Al2O3 catalyst exhibited significantly higher 1,2-dichloroethane conversion (37%) and comparable selectivity to ethylene (95%) compared to the monometallic Ni catalyst.
ACS APPLIED NANO MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Jintae Jeon, Yuri Park, Yuhoon Hwang
Summary: In this study, a Pd catalyst supported on alumina and graphene-based materials was used for the HDC of 4-CP. The reaction was found to be very efficient under the catalysis of Pd/GO and Pd/rGO. The granulation of Pd/rGO was investigated to improve the separation of catalyst and treated aqueous solution, enhancing the practical applicability of HDC.
Article
Engineering, Environmental
Junxi Li, Yanju Chen, Ruiyu Bai, Chong Chen, Wenhong Wang, Yuan Pan, Yunqi Liu
Summary: This study successfully designed a low noble metal supported catalyst with high efficiency for electrocatalytic hydrodechlorination. The nanosheet array electrode achieved complete dechlorination within 90 minutes with a 50% reduction in noble metal consumption.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Engineering, Environmental
Lei Zuo, Junfeng Wang, Deqing Mei, Derick Adu-Mensah, Yaping Gao
Summary: The study investigated the ultrasonic-assisted CTH process for biodiesel, which effectively controlled the generation of C18:0 and trans-C18:1. The optimum reaction conditions were found to be reaction temperature of 80°C, stirring rate of 600 rpm, catalyst dosage of 10 wt%, isopropanol amount of 32 g, and water amount of 100 g. The ultrasonic field reduced the selectivity of trans-C18:1 and decreased the iodine value of biodiesel.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Chemistry, Physical
Yalong Liao, Yiyang Wang, Yu Zhang
Summary: In this study, a Pd-Ni bimetallic catalyst supported on a composite carrier of gamma Al2O3 and SiO2 was successfully prepared using chemical precipitation methodology enhanced with an ultrasonic wave. The catalyst's performance was characterized, and the results showed that it had a uniform distribution at nanoscale and exhibited excellent dechlorination property.
Article
Chemistry, Physical
Barbora Kamenicka, Tomas Weidlich
Summary: This article aimed to compare the degradation efficiencies of different reactants applicable for the oxidative or reductive degradation of a chlorinated anionic azo dye, Mordant Blue 9 (MB9). The efficiencies of both the oxidative and reductive degradation processes were monitored and compared. A combination of reduction methods offers a smooth, simple, and efficient degradation and hydrodehalogenation of chlorinated textile MB9 dye.
Article
Chemistry, Multidisciplinary
Beatriz Garcia, Ana Orozco-Saumell, Manuel Lopez Granados, Jovita Moreno, Jose Iglesias
Summary: The catalytic transfer hydrogenation of glucose to sorbitol using biomass-derived alcohols and diols as hydrogen donors was studied. Sacrificial diols showed superior performance compared to short-chain alcohols, with terminal diols providing high selectivity in the conversion. Molybdenum promotion enhanced catalytic activity of sponge nickel catalysts, allowing high selectivity in continuous-flow operation for at least 550 hours.
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
(2021)
Article
Chemistry, Multidisciplinary
Ruijie Cheng, Linyu Li, Lizhi Tan, Haozhen Feng, Guangyan Xiang, Jun Xiong
Summary: This study developed three Pd-based Ni foam reactors for the hydrodechlorination (HDC) of chlorophenols (CPs) in flow. The presence of SiO2 coating and CeO2 in the Pd-Ce/SiO2/Ni foam reactor improved the catalytic surface area and promoted active Pd dispersion. The Pd-Ce/SiO2/Ni foam reactor exhibited the fastest kinetics and lowest apparent activation energy, achieving almost complete degradation of CPs with a short cycle time of 60 s and excellent long-term catalytic stability in real water.
NEW JOURNAL OF CHEMISTRY
(2023)
Article
Chemistry, Physical
Yongjun Ji, Xiaoli Chen, Shaomian Liu, Liwen Xing, Xingyu Jiang, Bin Zhang, Huifang Li, Wenxing Chen, Ziyi Zhong, Ligen Wang, Guangwen Xu, Fabing Su
Summary: This study demonstrates a facile strategy to enhance the catalytic performance of CuO-ZnO catalyst by introducing defects such as oxygen vacancies and localized amorphous regions. Theoretical calculations reveal the influence of defects on the generation of active phases and electronic structures, providing new insights for improving catalyst structure and catalytic performance.
Article
Chemistry, Physical
Yongjun Ji, Xiaoli Chen, Shaomian Liu, Liwen Xing, Xingyu Jiang, Bin Zhang, Huifang Li, Wenxing Chen, Ziyi Zhong, Ligen Wang, Guangwen Xu, Fabing Su
Summary: This study demonstrates a simple strategy to improve the catalytic performance of CuO-ZnO model catalysts by introducing two different types of defects. Oxygen vacancies primarily enhance the selectivity of the target product, while localized amorphous regions significantly increase the conversion of the reactants.
Article
Biochemistry & Molecular Biology
Yan Xiao, Jie Li, Yuan Tan, Xingkun Chen, Fenghua Bai, Wenhao Luo, Yunjie Ding
Summary: The catalytic conversion of biomass-derived ethanol into n-butanol through Guerbet coupling reaction has attracted significant attention. In this study, a series of supported Cu catalysts were prepared and tested, and Cu/NiAlOx showed the best performance in terms of butanol selectivity and catalyst stability.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2023)
Article
Chemistry, Physical
Wenyan Zhang, Wei Wang, Yingfei Hu, Hangmin Guan, Xiaoli Yang, Lingyun Hao
Summary: This study reports the design and electrocatalytic properties of chiral CuO@Ni with a three-dimensional continuous macroporous framework, demonstrating its high catalytic activity in water splitting. The OER overpotential of chiral CuO@Ni can be easily regulated by controlling the deposition time of the CuO layer, and its catalytic activity is closely related to the CISS effect, large reactive area, and effective cooperation between chiral CuO and Ni foam.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Engineering, Chemical
Rohit R. Shetty, Sandesh S. Raut, Prashant S. Kulkarni, Sanjay P. Kamble
Summary: This study developed a method to convert 4C2AP into a valuable product, 2AP, through catalytic hydrodechlorination reaction. By adjusting reaction conditions such as the amount of reducing agents, pH of wastewater, and the presence of salt, high selectivity conversion can be achieved. The results suggest that alkaline condition, presence of salt, and higher reaction temperature favor the hydrodechlorination process.
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2022)
Article
Chemistry, Multidisciplinary
Deng Pan, Gen Luo, Yang Yu, Jimin Yang, Yi Luo
Summary: Computational studies have been conducted on Ir(iii)-catalyzed branch-selective allylic C-H amination of terminal olefins with methyl dioxazolone to investigate the mechanism and determine the origins of regioselectivity and catalytic activity difference. The presence of AgNTf2 can thermodynamically promote the formation of catalytically active species. In the Co system, the high energy barrier for allylic C-H activation is mainly attributed to the weaker coordination capacity of alkenes to Cp*Co(OAc)(+) and the deficient metal-hydrogen interaction.
Article
Chemistry, Physical
Qiqi Jin, De Fang, Yanli Ye, Sensheng Hou, Feng He, Junlin Xie
Summary: The role of Cu, Co, or Ni species in exchanged zeolite catalysts for NH3-SCR has been studied using different preparation methods. Ammonia wet ion exchange method (AWIE) was found to be effective in increasing ionic species and improving ion polymerization degree in NaY zeolites. Cu, Co, and Ni substituted Y zeolite prepared by AWIE method showed better SCR performance than conventional wet ion exchange method (CWIE). The coordination states and chemical environments of Cu, Co, and Ni exchanged species affected the redox and adsorption properties of catalysts. Cu-NH3-IE catalyst exhibited a wider SCR temperature window compared to Co-NH3-IE and Ni-NH3-IE catalysts due to its more stable NH3 adsorption, lower temperature, and smaller reduction peak area. The balance of NH3 adsorption and oxidation was proposed as the key factor for achieving high N2 selectivity. This work provides a new approach for improving the activity and N2 selectivity of zeolite catalysts over a broad temperature range.
APPLIED SURFACE SCIENCE
(2022)
