scholarly journals Hybrid Polymer-Immobilized Nanosized Pd Catalysts for Hydrogenation Reaction Obtained via Frontal Polymerization

2013 ◽  
Vol 2013 ◽  
pp. 1-12 ◽  
Author(s):  
Anatolii D. Pomogailo ◽  
Gulzhian I. Dzhardimalieva
Keyword(s):  
Pd Nanoparticles ◽  
Hydrogenation Reaction ◽  
Frontal Polymerization ◽  
Hybrid Nanocomposites ◽  
Pd Catalysts ◽  
New Approach ◽  
Inorganic Composites ◽  
Nondestructive Testing Method ◽  
Physical And Chemical ◽  
Polymer Stabilized

A new approach to the synthesis of mixed-type immobilized catalysts by frontal polymerization of metal-containing monomer in the presence of highly dispersed mineral support has been developed. Synthesis of the acrylamide Pd(II) nitrate complex, Pd(CH2=CHCONH2)2 (NO3)2 (PdAAm), on the SiO2 (Al2O3, C) surface and its consequent frontal polymerization and reduction lead to the formation of organic-inorganic composites with polymer-stabilized Pd nanoparticles. The immobilized metal complexes and palladium nanoparticles were characterized by various physical and chemical methods. The synthesized hybrid nanocomposites are efficient and selective catalysts for hydrogenation of cyclohexene, alkene, and acetylene alcohols, as well as di- and trinitrotoluene. Catalyst intermediates separated by nondestructive testing method have been described and changing in the palladium charge during the catalytic process has been identified.

scholarly journals Fabrication of Hybrid Nanocomposites of PAA-grafted Graphene and Pd Nanoparticles having POSS (Pd-POSS)

Polymer Korea ◽  
2012 ◽  
Vol 36 (5) ◽  
pp. 656-661 ◽  
Author(s):  
Jung-Hyurk Lim ◽  
Yl-Woong Ko ◽  
Ki-Young Kim ◽  
Kyung-Min Kim
Keyword(s):  
Pd Nanoparticles ◽  
Hybrid Nanocomposites

scholarly journals Ultrafine Pd Nanoparticles Supported on Soft Nitriding Porous Carbon for Hydrogen Production from Hydrolytic Dehydrogenation of Dimethyl Amine-Borane

Nanomaterials ◽  
2020 ◽  
Vol 10 (8) ◽  
pp. 1612
Author(s):  
Zhaoyu Wen ◽  
Qiong Fu ◽  
Jie Wu ◽  
Guangyin Fan
Keyword(s):  
Porous Carbon ◽  
High Performance ◽  
Hydrogen Generation ◽  
Pd Nanoparticles ◽  
Catalytic Performance ◽  
Pd Catalysts ◽  
Nano Catalyst ◽  
Dimethyl Amine ◽  
Catalytic Hydrogen ◽  
Hydrolysis Of

Simple and efficient synthesis of a nano-catalyst with an excellent catalytic property for hydrogen generation from hydrolysis of dimethyl amine-borane (DMAB) is a missing piece. Herein, effective and recycled palladium (Pd) nanoparticles (NPs) supported on soft nitriding porous carbon (NPC) are fabricated and applied for DMAB hydrolysis. It is discovered that the soft nitriding via a low-temperature urea-pretreatment induces abundant nitrogen-containing species on the NPC support, thus promoting the affinity of the Pd precursor and hindering the agglomeration of formed Pd NPs onto the NPC surface during the preparation process. Surface-clean Pd NPs with a diameter of sub-2.0 nm deposited on the NPC support (Pd/NPC) exhibit an outstanding catalytic performance with a turnover frequency (TOF) of 2758 h−1 toward DMAB hydrolysis, better than many previous reported Pd-based catalysts. It should be emphasized that the Pd/NPC also possesses a good stability without an obvious decrease in catalytic activity for DMAB hydrolysis in five successive recycling runs. This study provides a facile but efficient way for preparing high-performance Pd catalysts for catalytic hydrogen productions.

Recyclable catalyst for catalytic hydrogenation of phenylacetylene by coupling Pd nanoparticles with highly compressible graphene aerogels

RSC Advances ◽  
2014 ◽  
Vol 4 (104) ◽  
pp. 59977-59980 ◽  
Author(s):  
Xu Zhang ◽  
Zhiyu Wang ◽  
Shuang Li ◽  
Chunlei Wang ◽  
Jieshan Qiu
Keyword(s):  
Graphene Oxide ◽  
Catalytic Hydrogenation ◽  
Chemical Reduction ◽  
Pd Nanoparticles ◽  
Catalytic Performance ◽  
Hydrogenation Reaction ◽  
Recyclable Catalyst ◽  
Graphene Aerogels ◽  
Excellent Catalytic Performance

Highly compressible graphene aerogels were made by chemical reduction of graphene oxide with HI, which act as recyclable catalyst to exhibit excellent catalytic performance towards selective semi-hydrogenation reaction after loading Pd nanoparticles.

Microwave-assisted route for the preparation of Pd anchored on surfactant functionalized ordered mesoporous carbon and its electrochemical applications

RSC Advances ◽  
2016 ◽  
Vol 6 (75) ◽  
pp. 70810-70815 ◽  
Author(s):  
Fang Li ◽  
Huan Wang ◽  
Xiaoqing Zhao ◽  
Bingqian Li ◽  
Yufan Zhang
Keyword(s):  
Sodium Dodecyl Sulphate ◽  
Mesoporous Carbon ◽  
Sodium Dodecyl ◽  
Pd Nanoparticles ◽  
Ordered Mesoporous Carbon ◽  
Hybrid Nanocomposites ◽  
Microwave Assisted ◽  
Electrochemical Applications ◽  
Ordered Mesoporous

A microwave-assisted route for rapidly synthesizing Pd nanoparticles assembled on sodium dodecyl sulphate (SDS)-functionalized ordered mesoporous carbon (Pd-SOMC) hybrid nanocomposites has been reported.

Graphene-based porous carbon-Pd/SnO2 nanocomposites with enhanced electrocatalytic activity and durability for methanol oxidation

2016 ◽  
Vol 4 (22) ◽  
pp. 8898-8904 ◽  
Author(s):  
Lirui Nan ◽  
Zetan Fan ◽  
Wenbo Yue ◽  
Qiao Dong ◽  
Lisha Zhu ◽  
...  
Keyword(s):  
Methanol Oxidation ◽  
Porous Carbon ◽  
Electrocatalytic Activity ◽  
Pd Nanoparticles ◽  
Pd Catalysts ◽  
Supported Pd Catalysts ◽  
Supported Pd

Pd nanoparticles with a trace of SnO2 are prepared on a novel graphene-based porous carbon and they show dramatically improved electrocatalytic activity and durability for methanol oxidation compared to porous carbon supported Pd catalysts with SnO2 or graphene-based porous carbon supported Pd catalysts without SnO2.

scholarly journals APPLICABILITY OF THE LANGMUIR-HINSHELWOOD MODEL TO HYDROGENATION OF MONO - AND DISACCHARIDES ON THE Ru/HPS MN 100 CATALYST

2020 ◽  
pp. 29-40
Author(s):  
Максим Евгеньевич Григорьев ◽  
Олег Викторович Манаенков ◽  
Валентина Геннадьевна Матвеева ◽  
Роман Викторович Бровко
Keyword(s):  
Low Temperature ◽  
Specific Surface ◽  
Photoelectron Spectroscopy ◽  
Kinetic Studies ◽  
Nitrogen Adsorption ◽  
Chemical Study ◽  
Hydrogenation Reaction ◽  
Hydrogen Chemisorption ◽  
Entire Volume ◽  
Physical And Chemical

В данной статье представлены данные по физико-химическому исследованию гетерогенного рутений содержащего катализатора Ru/СПС MN 100. Представлена важность таких исследование для изучения каталитических реакций, для установления возможного механизма реакции гидрирования, а так же как дополнения при кинетических исследованиях. В статье катализатор исследован методом низкотемпературной адсорбции азота, хемосорбции водорода, просвечивающей электронной микроскопии (ПЭМ) и рентгенофотоэлектронной спектроскопии (РФЭС). Метод низкотемпературной адсорбции азота позволил установить, что катализатор характеризуется развитой внутренней удельной поверхностью (726 м/г по модели БЭТ) и характеризуется значительной мезопористостью, при этом наибольший диаметр пор составляет около 3.6 нм. Удельная площадь поверхности активного металла - Ru, по данным метода хемосорбции водорода, составляет 1 м/г. Рутений содержащие частицы распределены по всему объему носителя, при этом они способны образовывать небольшие агрегаты и характеризуются различной степенью кристалличности. Установлен элементный состав поверхности катализатора; Ru имеет различные степени окисления. На основании полученной ранее математическая модель процесса и проведенных физико-химических исследований катализатора предположена модель Ленгмюра-Хиншельвуда для описания механизма реакции жидкофазного каталитического гидрирования моно- и дисахаридов. This article presents data on the physical and chemical study of heterogeneous ruthenium-containing catalyst Ru/SPS MN 100. The importance of such studies for the study of catalytic reactions, for establishing the possible mechanism of the hydrogenation reaction, as well as additions in kinetic studies is presented. In this paper, the catalyst was studied by low-temperature nitrogen adsorption, hydrogen chemisorption, transmission electron microscopy (TEM), and x-ray photoelectron spectroscopy (XPS). The method of low-temperature nitrogen adsorption allowed us to establish that the catalyst is characterized by a developed internal specific surface (726 m/g according to the BET model) and is characterized by significant mesoporicity, with the largest pore diameter of about 3.6 nm. The specific surface area of the active metal - Ru, according to the method of hydrogen chemisorption, is 1 m/g. Ruthenium containing particles are distributed over the entire volume of the carrier, while they are able to form small aggregates and are characterized by different degrees of crystallinity. The elemental composition of the catalyst surface has been determined; Ru has different oxidation States. Based on the previously obtained mathematical model of the process and physical and chemical studies of the catalyst, the Langmuir-Hinshelwood model is proposed to describe the reaction mechanism of liquid-phase catalytic hydrogenation of mono - and disaccharides.

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