Article
Chemistry, Multidisciplinary
Leiyang Lv, Chao-Jun Li
Summary: This study reports the first ruthenium-catalyzed beta-selective alkylation of vinylpyridines with both aromatic and aliphatic aldehyde/ketones via N2H4 mediated deoxygenative couplings. The two-electron umpolung strategy realized reductive deoxygenation targets, allowing for regioselective alkylation of a broad range of substituted pyridines.
Article
Polymer Science
Wonyeong Ryu, Li Xiang, Kyeong Sik Jin, Hyun-Joong Kim, Hong-Chul Kim, Moonhor Ree
Summary: This study demonstrates the excellent digital memory characteristics of polymers bearing 2-pyrrolidone and succinimide moieties, which show high ON/OFF current ratios and long-term reliabilities for both nonvolatile and volatile memory. These polymers could be used as new and economical electroactive building blocks for advanced digital memory materials.
MACROMOLECULAR RAPID COMMUNICATIONS
(2021)
Article
Chemistry, Physical
N. Kh. Khaldarov, S. Zh. Egemberdiyeva, Ye. I. Kistaubayev, Sh. K. Shapalov, R. F. Altynbekov
Summary: The research aims to develop highly efficient catalytic systems based on three-component alloyed Ni catalysts containing metals (Ru, Rh) for the liquid-phase hydrogenation of aldehydes to butyl alcohols. The physicochemical and catalytic properties of modified alloyed Ni catalysts in the reaction of liquid-phase hydrogenation of butyl aldehyde to butyl alcohol have been investigated.
CATALYSIS COMMUNICATIONS
(2021)
Article
Chemistry, Multidisciplinary
Akihiro Otani, Masaya Kuroda, Satoshi Suganuma, Etsushi Tsuji, Naonobu Katada
Summary: By adjusting the pH of the RuCl3 aqueous solution used to impregnate Ru onto MFI zeolite, a higher yield of 2-pyrrolidone can be achieved due to the presence of more cationic Ru in MFI zeolite, providing more active sites for the decarbonylation reaction. This finding was supported by comparing the catalytic performance of Ru/MFI catalysts prepared by impregnation and ion exchange methods.
REACTION CHEMISTRY & ENGINEERING
(2021)
Article
Multidisciplinary Sciences
Matthias S. Frei, Cecilia Mondelli, Rodrigo Garcia-Muelas, Jordi Morales-Vidal, Michelle Philipp, Olga V. Safonova, Nuria Lopez, Joseph A. Stewart, Daniel Curulla Ferre, Javier Perez-Ramirez
Summary: This study investigates the complex interplay between nanostructure and product selectivity of nickel-promoted In2O3 in CO2 hydrogenation to methanol. The presence of nickel on the oxide surface forms InNi3 patches, which boost methanol production by providing neutral hydrogen species. Ratios of nickel to In content influence the formation of different structures and the production of CO and methane in the reaction.
NATURE COMMUNICATIONS
(2021)
Article
Chemistry, Multidisciplinary
Moritz O. Haus, Benedikt Winter, Lorenz Fleitmann, Regina Palkovits, Andre Bardow
Summary: The prospective assessment of environmental and economic costs of emergent technologies based on biomass feedstocks is important for guiding academic research and corporate investments. This study evaluates a new pathway for producing N-vinyl-2-pyrrolidone from succinic acid, showing that bio-based production can reduce global warming impacts by 25-53% compared to fossil alternatives. However, the reductions in global warming impacts should be weighed against increasing eutrophication and acidification.
Article
Chemistry, Physical
Tong Song, Xiao Zhang, Cong Xie, Ping Yang
Summary: In this paper, Ni nanoparticles embedded N-doped carbon nanotubes (CNTs) were decorated on superior thin g-C3N4 nanosheets as a co-catalyst for enhanced photocatalytic performance. The Ni-decorated CNTs (NiCNTs) demonstrated admirable conductivity and unique one-dimensional structure, generating more active sites and efficient charge transfer. The N-doped CNTs promoted charge separation, while Ni nanoparticles trapped photogenerated electrons for photoreduction reaction. The g-C3N4/NiCNTs composites showed excellent hydrogen generation rate and pollutant removal efficiency.
Article
Chemistry, Multidisciplinary
Ziyue Liu, Long Yan, Qian Jiang, Yuhui Huang, Chengmei Yang, Chenguang Wang, Xi Lu, Longlong Ma, Qi Zhang
Summary: A non-acidic mesoporous silica-supported Pt catalyst was developed to produce biomass-derived 5-methylpyrrolidone under room temperature and atmospheric hydrogen. The suitable mesoporous structure created high dispersion of Pt species and accelerated the reaction processes. The isomerization of imine to enamine on the catalyst made this conversion easy under mild conditions.
Article
Engineering, Environmental
Jiaxiang Zhang, Tianzuo Wang, Chengxiang Shi, Lun Pan, Xiangwen Zhang, Chong Peng, Ji-Jun Zou
Summary: An ammonium citrate assisted impregnation method was developed to fabricate loaded Ni catalyst for hydrogenation. The catalyst exhibits superior activity and high stability, making it suitable for hydrogenation of olefins and aromatics under low temperature conditions.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Chemistry, Multidisciplinary
Zhuang Ma, Vishwas G. Chandrashekhar, Bei Zhou, Asma M. Alenad, Nils Rockstroh, Stephan Bartling, Matthias Beller, Rajenahally Jagadeesh
Summary: Silica supported ultrasmall Ni-nanoparticles can efficiently convert nitriles to primary amines under mild conditions, offering broad applicability and good stability.
Article
Chemistry, Applied
A. A. Philippov, A. M. Chibiryaev, O. N. Martyanov
Summary: Catalytic hydrogenation of mono-, di- and trinuclear aromatic compounds was studied under hydrogen transfer conditions using 2-PrOH as hydrogen donor and Raney nickel as catalyst at different temperatures, showing that isolated aromatic rings have low reactivity, which can enhance the selectivity of the reaction.
Article
Chemistry, Multidisciplinary
Namhyung Kim, Hyungyeon Cha, Sujong Chae, Taeyong Lee, Yoonkwang Lee, Yujin Kim, Jaekyung Sung, Jaephil Cho
Summary: A stable lithium metal host with a defective graphene shell on a carbon matrix is proposed, which can guide dendrite-free lithium deposition and accommodate a rational amount of metallic lithium without severe cell volume change. This host exhibits good cycle stability (87.2% after 500 cycles) and low dimension variation (9 μm) in carbonate electrolyte full-cell evaluations. It also achieves improved cycling performance in the argyrodite Li6PS5Cl based high energy density all-solid-state battery full-cell configuration.
ENERGY & ENVIRONMENTAL SCIENCE
(2023)
Article
Chemistry, Applied
Hong Du, Xiuyun Ma, Miao Jiang, Peifang Yan, Yang Zhao, Z. Conrad Zhang
Summary: A silica supported nickel catalyst derived from nickel phyllosilicate was developed for efficient aqueous phase xylose hydrogenation to xylitol. The catalyst showed higher xylose conversion and excellent xylitol selectivity. The catalyst also demonstrated outstanding stability, making it promising for industrial applications in xylitol production from xylose aqueous hydrogenation.
Article
Agricultural Engineering
Gurmeet Singh, Tuhin S. Khan, Chanchal Samanta, Rajaram Bal, Ankur Bordoloi
Summary: 2-Pentanone has been successfully synthesized from biomass-derived furfural through simultaneous hydrodeoxygenation, ring-opening, and hydrogenation reactions over a bi-metallic Cu-Ni/SBA-15 catalyst in a fixed-bed continuous flow reactor. The catalyst exhibited high activity, selectivity, and stability, yielding 78% of 2-pentanone under mild reaction conditions for up to 20 hours.
BIOMASS & BIOENERGY
(2022)
Article
Chemistry, Physical
Caixia Zhu, Yingluo He, Ryotaro Kushita, Xiaobo Peng, Qingxiang Ma, Guangbo Liu, Jinhu Wu, Guohui Yang, Noritatsu Tsubaki
Summary: The development of low-cost nickel-based catalysts for the direct and selective hydrogenation of 2-butyne-1,4-diol (BYD) to butane-1,4-diol (BAD) is an important target. A high-performance catalyst, NA-80E, was developed using a facile alcohol-treated strategy and achieved outstanding BAD selectivity and BYD conversion under mild conditions. The alcohol treatment inhibited the side reaction and increased BAD selectivity, offering new possibilities for designing efficient and selective hydrogenation catalysts.
