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catalytic hydrolysis of phosphate diester (BNPP) and plasmid DNA by mononuclear macrocyclic polyamine metal complexes

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Chinese Chemical Letters 2009年第5期20卷 523-526页

作者： Qing Xiang Xiang Li Qun Zhang Xiao Qi Yu Ru Gang Xie Department of Chemistry and Life Science Leshan Teachers College Leshan 614004 China Department of Chemistry Sichuan University Chengdu 610064 China

The activities of the catalytic hydrolysis of phosphate diester （BNPP） [bis（p-nitrophenyl）phosphate diester] and plasmid DNA （pUC 18） by mononuclear macrocyclic polyamine metal complexes have been investigated in this paper. The results showed that the highest activity in hydrolysis of BNPP was obtained with le--Zn（II） complex （composed of lipophilic group） as catalyst. The hydrolysis rate enhancement is up to 3.64 × 10^4 fold. These metal complexes could effectively promote the cleavage of plasmid DNA （pUC18） at physiological conditions.

关键词： catalytic hydrolysis Macrocyclic polyamine Zn(II) complex BNPP Plasmid DNA

Surface characteristics of regenerative Fe-KOH/LSB catalysts for low-temperature catalytic hydrolysis of carbon disulfide and research of the surface regeneration mechanism

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Frontiers of Materials Science 2018年第4期12卷 426-437页

作者： Chi WANG Kai LI Xin SUN Yi MEI Xin SONG Ping NING Lina SUN Faculty of Chemical Engineering Kunming University of Science and TechnologyKunming 650500China Faculty of Environmental Science and Engineering Kunming University of Science and TechnologyKunming 650500China

In the present study, a series of regeneration conditions and the regeneration mechanism of modified lake sediment biochar (Fe-KOH/LSB) catalysts for low-temperature catalytic hydrolysis of carbon disulfide (CS2) were investigated. The results showed that Rm-WNA method had the best regeneration effect. Under optimal regeneration conditions, the sulfur capacity (13.86 mg[S]/g[catalyst]) of regenerated Fe- KOH/LSB was close to that of fresh Fe-KOH/LSB (14.88 mg[S]/g[catalyst]). The water washing process could wash away a small number of sulfates and a large number of alkaline groups. TG-DTA and DRTFIR results indicated that the nitrogen sweeping process could decompose Fe2(SO4)3 into Fe2O3, which partially recovered the catalytic and the adsorptive abilities. CO2-TPD results indicated that the alkali steeping process offer -OH groups, further improving the catalytic and the adsorptive abilities. After 3 times-regeneration, the sulfur capacity of Fe-KOH/LSB reached 13.31 mg[S]/g[catalyst], indicating that the Rm-WNA method had good stability for the recovery of the catalytic activity. BET, XPS and XRD results revealed that the decrease of the sulfur capacity for regeneration was attributed to the decrease of the adsorptive abilities of C and SiO2.

关键词： regeneration condition modified lake sediment regeneration mechanism biochar catalytic hydrolysis carbon disulfide

catalytic hydrolysis of Borohydride for Fuel Cells

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Chinese Journal of Chemical Engineering 2011年第4期19卷 693-697页

作者： WANG Lianbang ZHAN Xingyue YANG Zhenzhen MA Chun'an State Key Laboratory Breeding Base of Green Chemistry-Synthesis Technology College of Chemical Engineering and Material Science Zhejiang University of Technology Hangzhou 310014 China

Borohydrides present interesting options for the electrochemical power generation acting either as hydrogen source or anodic fuel for direct borohydride fuel cells(DBFC).In this work,Mg-Ni composite synthesized by mechanically alloying method,used as the catalyst for the hydrolysis of borohydride,has been ***-doping treatment has been carried out for the purpose of improving the hydrolysis rate *** as-prepared and Co-doped Mg-Ni composites with low cost showed high catalytic activity to the hydrolysis of borohydride for hydrogen *** Co-doping,the hydrogen generation rate was around 280 ml·g-1·*** would be a promising hydrogen source for fuel cells.

关键词： borohydride catalytic hydrolysis Mg-Ni composite fuel cell

Adsorption of acetanilide herbicides on soil and its components Ⅱ. Adsorption and catalytic hydrolysis of diethatyl-ethyl on saturated Na^+-, K^+-, Ca^(2+)-, and Mg^(2+)- montmorillonite

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Journal of Environmental Sciences 2001年第2期13卷 137-142页

作者： LIU Wei ping 1, FANG Zhuo 2, LIU Hui jun 1, YANG Wei chun 1(1.Institute of Environmental Science, Zhejiang University at Yuquan Campus, Hangzhou 310027, China. E mail: wpliu@*** 2.Institute of Industry Environmental Design, Zhejiang P

Adsorption and catalytic hydrolysis of the herbicide diethatyl ethyl [N chloroacetyl N (2,6 diethylphenyl)glycine ethyl ester] on homoionic Na + , K + , Ca 2+ , and Mg 2+ montmorillonite clays were investigated in water solution. The Freundlich adsorption coefficient, K f, got from isotherms on clay followed the order of Na +≈K +>Mg 2+ ≈Ca 2+ . Analysis of FT IR spectra of diethatyl ethyl adsorbed on clay suggests probable bonding at the carboxyl and amide carbonyl groups of the herbicide. The rate of herbicide hydrolysis in homoionic clay suspensions followed the same order as that for adsorption, indicating that adsorption may have preceded and thus caused hydrolysis. Preliminary product identification showed that hydrolysis occurred via nucleophilic substitution at the carboxyl carbon, causing the cleavage of the ester bond and formation of diethatyl and its dechlorinated derivative, and at the amide carbon, yielding an ethyl ester derivative and its acid. These pathways also suggest that hydrolysis of diethatyl ethyl was catalyzed by adsorption on the clay surface.

关键词： adsorption catalytic hydrolysis diethatyl diethatyl ethyl montmorillonite

Tuning the growth of Cu-MOFs for efficient catalytic hydrolysis of carbonyl sulfide

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Chinese Journal of Catalysis 2017年第8期38卷 1373-1381页

作者： Lijuan Shen Gaojie Wang Xiaoxiao Zheng Yanning Cao Yufeng Guo Ke Lin Lilong Jiang National Engineering Research Center of Chemical Fertilizer Catalyst Fuzhou University Fuzhou 350002 Fujian China

Development of the high activity,promoter‐free catalysts for carbonyl sulfide(COS)hydrolysis is important for the efficient utilization of various *** this study,the Cu‐based metal‐organic framework HKUST‐1is synthesized by a simple and mild anodic‐dissolution electrochemical *** physical and chemical properties of the samples are characterized by several techniques,including scanning electron microscopy,X‐ray diffraction,Brunauer‐Emmett‐Teller analysis and X‐ray photoelectron *** results reveal that the synthesis voltage plays a crucial role in controlling the morphology of the resulting HKUST‐*** obtained samples function as novel catalysts for the hydrolysis of COS.A high efficiency,approaching100%,can be achieved for the conversion of COS at150oC over the optimal HKUST‐1synthesized *** is significantly higher than that of the sample prepared by the traditional hydrothermal ***,the effects of the water temperature and the flow velocity on the hydrolysis of COS are also investigated in ***,a possible reaction pathway of COS hydrolysis over HKUST‐1is also *** work represents the first example of MOFs applied to the catalytic hydrolysis of *** results presented in this study can be anticipated to give a feasible impetus to design novel catalysts for removing the sulfur‐containing compounds.

关键词： Metal‐organic framework Carbonyl sulfide Electrochemical synthesis catalytic hydrolysis HKUST‐1

Porously Hierarchical Cu@Ni Cubic-cage Microstructure: Fabrication and catalytic hydrolysis for Ammonia Borane to Release H2 Gas

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Porously Hierarchical Cu@Ni Cubic-cage Microstructure: Fabri...

Sorption enhanced catalytic CF4 hydrolysis with a three-stage catalyst-adsorbent reactor

河南省化学会2016年学术年会

作者： Hao Zhang Yiming Zhu Jun Zhang Chemical Engineering and Pharmaceutics School Henan University of Science and Technology

Ammonia borane(AB) is a complex hydride that has the highest gravimetric hydrogen capacity ever discovered by now. Ammonia borane can controllably liberate hydrogen gas via hydrolysis or alcoholysis route by means of suitable catalyst, Some non-noble metals have been testified to have a certain level of catalytic activity for hydrolysis or alcoholysis of Ammonia borane. Therefore, it is reasonable for us to expect the emergence of inexpensive and efficient catalysts constituted by both the noble metals and non-noble metals,which certainly deserves in-depth study. By using alcohol-soluble salt of non-noble metal Cu and Ni as starting materials, a series of CuNi, CuNi, CuNi, CuNi, CuNi and CuNi bi/mono-metal catalysts have been fabricated by an one-step solvothermal reduction route. The morphology, phase makeup and chemical states of superficial elements of the catalyst were systematically analyzed respectively. The catalytic activity of the catalysts was minutely evaluated by means of the hydrolytic hydrogen release of ammonia borane under various conditions. The research results show that the as-synthesized products appear as porously hierarchical cubic-cage microstructure, having the larger specific areas. The existence of charge transfer from Cu to Ni gives rise to synergistic effect between Cu and Ni component, thus endowing the bimetal catalysts with better catalytic performance. The catalyst CuNi with the highest catalytic activity can entirely release H in 8 minutes, and has excellent stability catalytic activity after reusing for 5 times.

关键词： Copper nickel bimetal Cubic-cage microstructure Ammonia borane catalytic hydrolysis

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Frontiers of Chemical Science and Engineering 2017年第4期11卷 537-544页

作者： Jae-Yun Han Chang-Hyun Kim Boreum Lee Sung-Chan Nam Ho-Young Jung Hankwon Lim Kwan-Young Lee Shin-Kun Ryi . Advanced Materials and Devices Laboratory Korea Institute of Energy Research (KIER) Daejeon 34129 Korea.. Department of Advanced Materials and Chemical Engineering Catholic University of Daegu Gyeongbuk 38430 Korea.. Department of Environment and Energy Engineering Chonnam National University Gwangju 61186 Korea.. Department of Chemical and Biological Engineering Korea University Seoul 136-701 Korea

In this study, we developed a three-stage catalyst-adsorbent reactor for the catalytic hydrolysis of CF4. Each stage is composed of a catalyst bed followed by an adsorbent bed using Ca（OH）2 to remove HF. The three stages are connected in series to enhance the hydrolysis of CF4 and eliminate a scrubber to dissolve HF in water at the same time. With a 10 wt-% Ce/AlaO3 catalyst prepared by the incipient wetness method using boehmite and a granular calcium hydroxide as an adsorbent, the CF4 conversion in our proposed reactor was 7%-23% higher than that in a conventional single-bed catalytic reactor in the temperature range of 923-1023 K. In addition, experimental and numerical simulation （Aspen HYSYS） results showed a reasonable trend of increased CF4 conversion with the adsorbent added and these results can be used as a useful design guideline for our newly proposed multistage reactor system.

关键词： PFCs catalytic hydrolysis calcium hydro-xide sorption enhanced process simulation

Constructing ultrafine monodispersed Co_(2)P/(0.59-Cu_(3)P)on Cu doped CoZn-ZIF derived porous N-doped carbon for highly efficient dehydrogenation of ammonia borane

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Nano Research 2023年第5期16卷 6687-6700页

作者： Yinze Yang Liqing Zhao Xiangyang Gao Yafei Zhao School of Chemical Engineering Zhengzhou UniversityZhengzhou 450001China State Key Laboratory of Electroanalytical Chemistry Changchun Institute of Applied ChemistryChinese Academy of SciencesChangchun 130022China School of Environmental Engineering and Chemistry Luoyang Institute of Science and TechnologyLuoyang 471023China Key Laboratory of Artificial Micro Nano-structures of Ministry of EducationSchool of Physics and TechnologyWuhan UniversityWuhan 430072China

Rational construction of highly dispersed,small size,low cost catalysts for release of hydrogen from ammonia borane(AB)is regarded as a prospective approach for promoting the development of upcoming hydrogen ***,the high price and scarcity of precious metal catalysts impose restrictions on their large-scale *** this end,with the aid of a Cu doped CoZn-zeolitic imidazolate frameworks(ZIFs)template strategy,we successfully construct ultrafine monodispersed Co_(2)P/(0.59-Cu_(3)P)on CoZn-ZIF derived porous N-doped carbon(Co_(2)P/(0.59-Cu_(3)P)-NC)as an efficient non-noble-metal ***,Co and Cu atoms can be geometrically separated to high degree due to the presence of Zn in the CuCoZn-ZIF precursor,evaporation of Zn during pyrolysis can generate porous structure with the framework well *** results show that porous Co_(2)P/(0.59-Cu_(3)P)-NC bimetallic phosphide exhibits large specific surface area,hierarchical pore structure,well-exposed active *** on the kinetics analyses and ion effects,the catalyst has achieved an unprecedentedly high total turnover frequency(TOF)of 798 mol·molcat^(−1)·min^(−1)in 0.4 M NaOH solution at 298 K,which surpasses all the ever-reported transition-metal phosphides catalysts for hydrogen generation from *** and theoretical studies confirm that the highly porous structure of the support,the ultrafine and high dispersion of nanoparticles,the N/P doping and their synergistic effects(e.g.,M-P,M-N,N-C,M-M',M-support)jointly induce strong electron transfer,which can reduce the reaction energy barrier and enhance their interaction with AB,thus correspondingly obtaining excellent catalytic *** mechanism and strategy presented in this work pave an avenue for the design of non-noble metal catalyst for hydrogen energy system.

关键词： non-noble metal transition-metal phosphides porous N-doped carbon hydrogen evolution ammonia borane catalytic hydrolysis

Carbon disulfide hydrolysis over Fe-Cu/AC catalyst modified by cerium and lanthanum at low temperature

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Journal of Rare Earths 2010年第S1期28卷 343-346页

作者：何丹易红宏唐晓龙宁平王红妍赵顺征 Faculty of Environmental Science and Engineering Kunming University of Science and Technology

A series of coal-based active carbon(AC) catalysts loaded by Fe-Cu,Fe-Cu-Ce and Fe-Cu-La were prepared by the sol-gel method for carbon disulfide(CS2) hydrolysis and their performances for CS2 hydrolysis in a fixed-bed reactor were investigated in this *** results showed that the kind of rare earth oxide and its content had obvious effect on hydrolysis removal of *** effects of temperature,space velocity,CS2 concentration and O2 concentration were also discussed ***,the suitable operating conditions were *** was found that the poisoning of hydrolysis active sites could result in the formation of sulfuric acid on the catalyst surface.

关键词： rare earth oxide catalytic hydrolysis low temperature removal of CS2