Article
Chemistry, Physical
Jianfeng Shan, Yanfeng Xue, Dengfeng Wang, Zheng Chen, Shanhui Zhu
Summary: The study demonstrated that Pd/CoOx catalyst showed high ethanol selectivity and reusability in direct hydrogenolysis of glycerol to ethanol, with the assistance of Cu/SBA-15 as co-catalyst to enhance ethanol yield and inhibit catalyst aggregation. Synergistic catalysis of Pd/CoOx and Cu/SBA-15 achieved a record ethanol yield of 84.5% in glycerol hydrogenolysis reactions.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2022)
Article
Chemistry, Multidisciplinary
Kaili Zhang, Qinglei Meng, Haihong Wu, Mingyuan He, Buxing Han
Summary: This article introduces a Zr-based metal-organic framework (MOF-808) supported Pd catalyst, which can efficiently catalyze the hydrogenolysis of HMF under mild conditions with a yield of 99%, and also shows good reusability.
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
(2022)
Article
Chemistry, Multidisciplinary
Bin Hu, Lisa Warczinski, Xiaoyu Li, Mohong Lu, Johannes Bitzer, Markus Heidelmann, Till Eckhard, Qi Fu, Jonas Schulwitz, Mariia Merko, Mingshi Li, Wolfgang Kleist, Christof Hattig, Martin Muhler, Baoxiang Peng
Summary: This study demonstrates an efficient method for the hydrogenolysis of HMF to DMF under mild reaction conditions using Pd nanoparticles supported on N-containing and N-free mesoporous carbon materials, along with formic acid (FA) and hydrogen. It was found that the main role of FA is to shift the dominant reaction pathway from the hydrogenation of the aldehyde group to the hydrogenolysis of the hydroxymethyl group, thereby significantly enhancing the reaction rate. The interaction between Pd2+ species and pyridine-like N atoms was shown to enhance the selective hydrogenolysis of the C-OH bond in the presence of FA, leading to the stabilization of H-.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2021)
Article
Chemistry, Multidisciplinary
Xuechen Xu, Cheng-Bin Hong, Haichao Liu
Summary: We report a novel route to the sustainable synthesis of 5-Methyl-2-furancarboxylic acid (MFA) from bio-renewable 5-hydroxymethyl-2-furancarboxylic acid (HMFA) through the direct cleavage of the C-OH bond in HMFA at ambient temperature. Pd catalysts supported by active carbon (C) exhibited high efficiency and stability in the hydrogenolysis of HMFA to MFA, providing a high yield of 94.5%. This work provides an efficient strategy for the selective cleavage of the alpha-C-OH bonds in the furan ring and the sustainable production of MFA and its derivatives from biomass resources.
Article
Engineering, Environmental
Rosine Ahishakiye, Fumin Wang, Xubin Zhang, Mingshuai Sun, Yi Zhai, Yongkui Liu, Yuzhou Wu, Mengyue Li, Mengyao Li, Qing Zhang
Summary: A novel catalyst was developed for the selective hydrogenation of HMF to DMF. The catalyst exhibited excellent catalytic performance and high DMF yield under suitable reaction conditions. The surface acidity of the catalyst and the balance between metal and metal oxide species were found to be crucial for achieving a high yield of DMF.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Chemistry, Applied
Yiming Wang, Hong Li, Ze-nan Hu, Xin Chen, Zejun Sun, Yongjian Ai, Wenjuan Xu, Wenhui Zhang, Kelong Ding, Chengrui Li, Tong Jiang, Shuya Zhao, Haipeng Wang, Gang Zhang, Hong -bin Sun
Summary: In this study, a sandwich-type nanocomposite, UiO-66-NH2@Pt@PCN-222, was used as a synergistic catalytic system for the selective reduction of nitrobenzaldehydes to nitrobenzyl alcohols. The catalyst showed efficient catalytic activity and short reaction time due to the synergy between PCN-222 and Pt NPs. Additionally, PCN-222 provided active sites and protected the metal nanoparticles, resulting in the catalyst's intact activity during cycles.
MICROPOROUS AND MESOPOROUS MATERIALS
(2022)
Article
Chemistry, Physical
Lin Dong, Jordi Morales-Vidal, Lili Mu, Licheng Li, Nuria Lopez, Javier Perez-Ramirez, Zupeng Chen
Summary: In this study, an efficient selective synthesis of 5-Methylfurfural (MF) from 5-hydroxymethylfurfural (HMF) was achieved using an anatase-supported gold catalyst (Au/a-TiO2). The C-O bond was maintained during the hydrogenolysis of HMF, resulting in a high yield of 83.1% for MF. The superior performance of Au/a-TiO2 can be attributed to the high concentration of oxygen vacancies in the support, which limits H access, reduces reactant adsorption, and prevents condensation. This research highlights a new approach for the selective transformation of renewable compounds into high-value-added chemicals.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2023)
Article
Chemistry, Physical
Zhenxing Li, Mingliang Hu, Jiahao Liu, Weiwei Wang, Yanjie Li, Wenbin Fan, Yixuan Gong, Jiasai Yao, Ping Wang, Miao He, Yongle Li
Summary: A mesoporous silica stabilized Pd-Ru@ZIF-8 nanoreactor was designed and showed superior performance in selective semi-hydrogenation of phenylacetylene to styrene, with high conversion and selectivity. The synergistic effect of single-site Pd and Ru anchored into the ZIF-8 framework contributed to the enhanced catalytic activity.
Article
Chemistry, Physical
Xiaofeng Wang, Zuyi Zhang, Ziyi Yan, Qingbo Li, Chengcheng Zhang, Xinhua Liang
Summary: In this study, a Cu/CoOx catalyst was synthesized using a facile co-precipitation method and applied to the efficient hydrodeoxygenation (HDO) of biomass derivatives. Experimental results and systematic characterizations revealed that CoOx tended to adsorb C=O bonds as acid sites, while the metal sites of Cu+ enhanced C=O bond hydrogenation by adsorbing C-O bonds. Cu-0 was identified as the main active site for 2-propanol dehydrogenation. The excellent catalytic performance was attributed to the synergistic effects of Cu and CoOx. Cu/CoOx catalysts with optimized Cu to CoOx ratio showed notable performance in HDO of acetophenone, levulinic acid, and furfural, verifying the universality of the catalysts in HDO of biomass derivatives.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2023)
Article
Nanoscience & Nanotechnology
Yindian Wang, Wenxin Qi, Zhihui Mao, Jiao Wang, Robert Chunhua Zhao, Hongxia Chen
Summary: This study developed a bio-inspired transparent hydrogel material that exhibits synergistic effects in anti-infection and wound healing throughout the entire wound healing process. The material provides fixation for blood and skin cells, and destroys the outer membrane of bacteria while releasing reactive oxygen species and copper ions, leading to an excellent antibacterial effect. Experimental results showed that the material achieved a wound closure rate of 92% within ten days, highlighting its potential in promoting whole-process wound healing.
MATERIALS TODAY NANO
(2023)
Article
Energy & Fuels
Xi Li, Yuan Liu, Wenjin Wang, Jin Wang, Kingdom Alorku, Qiying Liu, Longlong Ma, Ying Xu
Summary: Solvents and catalysts play a crucial role in the depolymerization of lignin. This study investigated the effect of different solvents on the hydrogenolysis of ss-O-4 MC and alkaline lignin. It was found that ethanol and 1,4-dioxane resulted in higher conversion and monophenol yield for MC. The composition, structure, and distribution of lignin degradation products were analyzed, and the results showed that different solvent ratios and reaction conditions influenced the monomer yields. The synergistic effect of Pd/C and NaOH improved monomer yield and inhibited intermediate polymerization.
Article
Chemistry, Multidisciplinary
Xiaohong Hu, Zhijian Li, Haiyong Wang, Haosheng Xin, Song Li, Chenguang Wang, Longlong Ma, Qiying Liu
Summary: This study reports a one-step preparation of 2-hexanol using 5-hydroxymethylfurfural (HMF) as a substrate, and investigates the relationship between carrier and catalytic activity. The results show that the 5% Au/ZrO2 catalyst achieves the highest yield of 2-hexanol, and exhibits excellent durability and significant reactivity on other biomass-derived substrates.
Article
Chemistry, Applied
Zi Zeng, Jiaoyang Xie, Yue Guo, Ruiheng Rao, Bo Chen, Lihua Cheng, Ying Xie, Xinping Ouyang
Summary: Highly dispersed Fe-Pd bimetallic catalyst supported on HZSM-5 showed good catalytic activity for lignin hydrogenolysis, with FP-1.0 bimetallic catalyst achieving high lignin conversion and aromatic monomers yield. The presence of Fe facilitated Pd dispersion and electron transfer, leading to enhanced hydrogen activation and catalytic performance. FP-1.0 bimetallic catalyst may serve as a cost-effective and highly active catalyst for selective lignin hydrogenolysis.
FUEL PROCESSING TECHNOLOGY
(2021)
Article
Chemistry, Physical
Anna Katharina Beine, Jil Ludovicy, Jiachun Chai, Jan P. Hofmann, Christoph Glotzbach, Peter J. C. Hausoul, Regina Palkovits
Summary: In this study, the researchers achieved high selectivity for the production of glycols by suppressing side-reactions through the introduction of heteroatom doped carbon materials as catalyst supports. Nitrogen doping showed enhanced selectivity due to its weaker electron withdrawing properties.
Article
Chemistry, Physical
Yueyue Li, Ruonan Wang, Bowen Huang, Liangliang Zhang, Xuran Ma, Shikun Zhang, Zhiguo Zhu, Hongying Lu, Kaixuan Yang
Summary: This study reported an efficient catalyst for the conversion of HMF to high-value-added chemical DMF. The catalyst showed excellent stability and reusability, and achieved selective conversion of HMF by modulating the electronic structure of nickel. Furthermore, the synergy between acid-base sites and indium played a crucial role in the catalytic process.
APPLIED SURFACE SCIENCE
(2022)
Article
Chemistry, Physical
Yongwei Li, Shiguang Pan, Ronghuan Han, Jian Gao, Dan Liu, Jianzhou Gui
Summary: In this study, phosphotungstate organic-inorganic hybrid materials with dual catalytic oxidation active centers were successfully synthesized and employed as catalysts for the selective oxidation of N-methylmorpholine. The -COOH functionalized hybrids showed much better activity than conventional hybrids and even better than the mixture of corresponding ionic liquid and H3PW12O40. Structural characterization and mechanism analysis confirmed the existence of catalytic active species and the synergistic effect in the hybrids.
Article
Engineering, Environmental
Yiming Zhang, Xusheng Wang, Xiaohui Ren, Shunqin Luo, Hengming Huang, Rongsheng Chen, Shibo Shao, Dan Liu, Junkuo Gao, Jianzhou Gui, Jinhua Ye
Summary: A flexible polymer engineering strategy was used to fabricate a homogeneous conductive N-doped carbon (NC) layer between CdS photo-absorber and surface NiO cocatalyst, which can greatly improve the photocatalytic performance by building a rapid charge transfer channel.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Chemistry, Inorganic & Nuclear
Xuan Wu, Aijing Ma, Jun Hu, Dan Liu, Alex T. Kuvarega, Bhekie B. Mamba, Jianzhou Gui
Summary: This study presents a facile method to prepare amorphous nickel-iron hydroxide crossed-nanosheets, which exhibit high selectivity and faradaic efficiency in electrocatalytic nitrate reduction to ammonia. N-15 isotope labelling experiments confirm the origin of ammonia from nitrate, and both H-1 nuclear magnetic resonance spectroscopy and UV-Vis spectrophotometry show similar amounts of generated ammonia. Online differential electrochemical mass spectrometry results reveal the intermediates during the electroreduction of nitrate to ammonia. XPS results demonstrate the significant role of oxygen vacancies in improving the electrocatalytic performance. Moreover, the structure and activity of materials can be well maintained after long-term testing.
INORGANIC CHEMISTRY FRONTIERS
(2023)
Article
Energy & Fuels
Siyu Yue, Wancang Song, Shiguang Pan, Dan Liu, Chen Li, Jiazhong Zang, Jun Nan, Jianzhou Gui
Summary: Researchers successfully synthesized organic-inorganic hybrid materials [Rmim](4)Mo8O26 and evaluated their oxidative desulfurization (ODS) performance. These catalysts showed a H2O2-responsive phase transfer into the MeCN phase, improving the ODS performance and facilitating S compound extraction. Additionally, the hybrid material [Omim](4)Mo8O26 with the longest alkyl chain displayed the highest desulfurization efficiency, achieving over 97% sulfur removal in real diesel.
Article
Energy & Fuels
Aijing Ma, Yunrong Zhao, Qiang Liu, Xuan Wu, Shaopu Hu, Dan Liu, Alex T. Kuvarega, Bhekie B. Mamba, Jianzhou Gui
Summary: A potassium-promoted NiO-NiCo2O4 composite with an urchin-like structure (K/NiO-NiCo2O4 US) was prepared and exhibited high catalytic activity for soot oxidation at low temperatures, which is promising for practical applications.
Article
Engineering, Chemical
Jianshen Wang, Di Zhang, Gangguo Zhao, Dan Liu, Alex T. Kuvarega, Bhekie B. Mamba, JianZhou Gui
Summary: A CoCeOx nanocomposite catalyst with uniform dispersion of Co and Ce metal oxides and small crystal size was obtained by sacrificing hydrothermally prepared carbon spheres as the template. The catalyst prepared by template sacrificing method exhibited better catalytic activity and stability, lower activation energy, and higher turnover frequency in the catalytic oxidation of toluene compared with the conventional coprecipitation method. The small crystal size, larger pore size, enhanced low-temperature reducibility, and abundant oxygen vacancies contributed to the superior activity. The in situ FTIR study proposed the oxidation intermediates and reaction pathways over the Co-Ce oxide nanocomposite catalyst. This work provides an effective method for the synthesis of uniform bimetallic nanocomposites with ultrasmall crystal size, which opens an avenue for new catalyst design methods for the oxidation of volatile organic compounds.
SEPARATION AND PURIFICATION TECHNOLOGY
(2023)
Article
Chemistry, Multidisciplinary
Sellan Premkumar, Thankappan Thrupthika, Maheswari Palanivel, Dan Liu, Devaraj Nataraj, Wei Lei, Jianzhou Gui
Summary: Dumbbell-like silver bismuth iodide perovskite heterostructures were fabricated using a modified emulsion method. The addition of acetone as a demulsifier drove the crystallization process and resulted in the formation of dumbbell-shaped structures. The resulting heterostructure exhibited improved photocurrent properties, indicating efficient transfer of photogenerated electrons from the perovskite system to the metal head.
NEW JOURNAL OF CHEMISTRY
(2023)
Article
Chemistry, Multidisciplinary
Jun Hu, Aijing Ma, Xuan Wu, Yilin Yin, Dan Liu, Alex T. T. Kuvarega, Bhekie B. B. Mamba, Jianzhou Gui
Summary: A Mn3O4/CuOx heterostructure supported on copper foil (CF) was designed for electrocatalytic nitrate reduction to ammonia. The selectivity and Faraday efficiency of ammonia were 96.79% and 86.55%, respectively. Multiple characterizations showed that Mn3O4/CuOx/CF exhibited faster charge transfer and generated more electron-deficient Mn sites, electron-rich Cu sites, and oxygen vacancies, which enhanced the catalytic activity. This study may provide a new approach for constructing heterostructures as electrocatalysts for nitrate reduction to ammonia.
CHEMICAL COMMUNICATIONS
(2023)
Article
Chemistry, Multidisciplinary
Shiguang Pan, Jia Guo, Xue Chen, Dan Liu, Alex T. Kuvarega, Bhekie B. Mamba, Jianzhou Gui
Summary: Zinc oxide nanowires impregnated with trace amounts of palladium ions were used as a heterogeneous catalyst in the Suzuki reaction. The catalyst demonstrated exceptional efficiency in promoting the reaction and could be recovered and reused multiple times without significant decline in its activity.
ARABIAN JOURNAL OF CHEMISTRY
(2023)
Article
Engineering, Chemical
Yunrong Zhao, Aijing Ma, Gangguo Zhao, Jianshen Wang, Shaopu Hu, Dan Liu, Alex T. Kuvarega, Bhekie B. Mamba, Jianzhou Gui
Summary: In this study, a uniform acanthosphere-like CeO2 catalyst endowed with porous spikes was designed and prepared, showing outstanding catalytic performance and high thermal stability.
SEPARATION AND PURIFICATION TECHNOLOGY
(2024)