Imidazolium-based silica microreactors for the efficient conversion of carbon dioxide

2015 ◽  
Vol 5 (2) ◽  
pp. 1222-1230 ◽  
Author(s):  
Mireia Buaki-Sogo ◽  
Hermenegildo Garcia ◽  
Carmela Aprile
Keyword(s):  
Carbon Dioxide ◽  
Active Sites ◽  
Catalytic Performance ◽  
Self Organization ◽  
Organic Salts ◽  
Inorganic Hybrid ◽  
Efficient Conversion ◽  
Catalytic Active Sites ◽  
Excellent Catalytic Performance

Imidazolium-based silica microreactors were synthesized through self-organization/polymerization of the amphipathic organic salts that behave as templates for the construction of silica architecture and as catalytic active sites. The organic–inorganic hybrid microreactors displayed excellent catalytic performance in the conversion of CO2.

Carbon dioxide hydrogenation to methanol over Cu/ZrO2/CNTs: effect of carbon surface chemistry

RSC Advances ◽  
2015 ◽  
Vol 5 (56) ◽  
pp. 45320-45330 ◽  
Author(s):  
Guannan Wang ◽  
Limin Chen ◽  
Yuhai Sun ◽  
Junliang Wu ◽  
Mingli Fu ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
Surface Chemistry ◽  
Catalytic Performance ◽  
Carbon Surface ◽  
Nitrogen Species ◽  
Carbon Dioxide Hydrogenation ◽  
Adsorption Capability ◽  
Excellent Catalytic Performance

The excellent catalytic performance of Cu/ZrO2/CNTs is related to its H2 and CO2 adsorption capability, originating from nitrogen species on CNT.

Effects of Lanthanum on the Structure and the Catalytic Performance of Ni/Al2O3 Catalysts for the Hydrotreating of Crude 2-Ethylhexanol

2012 ◽  
Vol 10 (1) ◽  
Author(s):  
Renchun Yang ◽  
Xiaogang Li ◽  
Junsheng Wu ◽  
Xin Zhang ◽  
Zhihua Zhang ◽  
...  
Keyword(s):  
Active Sites ◽  
Catalytic Performance ◽  
Deposition Method ◽  
Active Centers ◽  
Hydrothermal Deposition ◽  
H2 Chemisorption ◽  
Ni Content ◽  
Dispersion Degree ◽  
Catalytic Active Sites

To study the effects of La modifier on Ni/γ-Al2O3 catalysts for the hydrotreating of crude 2-ethylhexanol, four samples with various La contents were prepared by the hydrothermal deposition method and characterized by ICP–AES, XRD, XPS, TPR, and H2 chemisorption. It was found that the number of catalytic active sites of the four samples with a similar Ni loading follows the order: Ni/La0/Al (13.2μmol gcat-1) < Ni/La0.5/Al (15.1μmol gcat-1) < Ni/La2.0/Al (15.8μmol gcat-1) < Ni/La1.0/Al (17.1μmol gcat-1). The results indicate that the catalyst modified by an appropriate La can obtain more active centers and higher hydrogenation performance because it possesses a higher surface Ni content and an appropriate Ni dispersion degree.

One-pot synthesis of sulfonated graphene oxide for efficient conversion of fructose into HMF

RSC Advances ◽  
2016 ◽  
Vol 6 (106) ◽  
pp. 104016-104024 ◽  
Author(s):  
Qidong Hou ◽  
Weizun Li ◽  
Meiting Ju ◽  
Le Liu ◽  
Yu Chen ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Catalytic Performance ◽  
One Pot ◽  
Efficient Conversion ◽  
One Pot Synthesis ◽  
Sulfonated Graphene ◽  
Excellent Catalytic Performance

Sulfonated graphene oxide prepared through a one-pot method shows excellent catalytic performance for the dehydration of fructose into 5-hydroxymethylfurfural.

Function-oriented ionic polymers having high-density active sites for sustainable carbon dioxide conversion

2018 ◽  
Vol 6 (19) ◽  
pp. 9172-9182 ◽  
Author(s):  
Yaju Chen ◽  
Rongchang Luo ◽  
Junhui Bao ◽  
Qihang Xu ◽  
Jun Jiang ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
Active Sites ◽  
Catalytic Performance ◽  
High Density ◽  
Ionic Polymers ◽  
Carbon Dioxide Conversion ◽  
Concept Of Function

Based on the concept of function-oriented synthesis, we pertinently developed a series of new functional ionic polymers, which exhibited good catalytic performance, robust constancy, and excellent substrate expansibility for sustainable catalysis of CO2-involved reactions.

scholarly journals The Role of Strontium in CeNiO3 Nano-Crystalline Perovskites for Greenhouse Gas Mitigation to Produce Syngas

Molecules ◽  
2022 ◽  
Vol 27 (2) ◽  
pp. 356
Author(s):  
Naushad Ahmad ◽  
Rizwan Wahab ◽  
Salim Manoharadas ◽  
Basel F. Alrayes ◽  
Munawwer Alam ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
Specific Surface ◽  
Surface Area ◽  
Specific Surface Area ◽  
Active Sites ◽  
Catalytic Performance ◽  
Catalyst Stability ◽  
Methane Reforming ◽  
Metal Support Interaction ◽  
Production Of Hydrogen

The transition metal-based catalysts for the elimination of greenhouse gases via methane reforming using carbon dioxide are directly or indirectly associated with their distinguishing characteristics such as well-dispersed metal nanoparticles, a higher number of reducible species, suitable metal–support interaction, and high specific surface area. This work presents the insight into catalytic performance as well as catalyst stability of CexSr1−xNiO3 (x = 0.6–1) nanocrystalline perovskites for the production of hydrogen via methane reforming using carbon dioxide. Strontium incorporation enhances specific surface area, the number of reducible species, and nickel dispersion. The catalytic performance results show that CeNiO3 demonstrated higher initial CH4 (54.3%) and CO2 (64.8%) conversions, which dropped down to 13.1 and 19.2% (CH4 conversions) and 26.3 and 32.5% (CO2 conversions) for Ce0.8Sr0.2NiO3 and Ce0.6Sr0.4NiO3, respectively. This drop in catalytic conversions post strontium addition is concomitant with strontium carbonate covering nickel active sites. Moreover, from the durability results, it is obvious that CeNiO3 exhibited deactivation, whereas no deactivation was observed for Ce0.8Sr0.2NiO3 and Ce0.6Sr0.4NiO3. Carbon deposition during the reaction is mainly responsible for catalyst deactivation, and this is further established by characterizing spent catalysts.

scholarly journals Efficient electrocatalytic reduction of carbon dioxide by metal-doped β12-borophene monolayers

RSC Advances ◽  
2019 ◽  
Vol 9 (47) ◽  
pp. 27710-27719 ◽  
Author(s):  
Jin-Hang Liu ◽  
Li-Ming Yang ◽  
Eric Ganz
Keyword(s):  
Carbon Dioxide ◽  
Catalytic Performance ◽  
Reduction Product ◽  
Electrocatalytic Reduction ◽  
Primary Reduction ◽  
Metal Doped ◽  
Excellent Catalytic Performance

These new TM–Bβ12 monolayers will display excellent catalytic performance for electroreduction of CO2. Primary reduction product of Sc is CO (overpotential 0.45 V). Primary product Ti–Zn is CH4, and Fe–Bβ12 has 0.45 V overpotential.

Iron clusters boosted performance in electrocatalytic carbon dioxide conversion

2020 ◽  
Vol 8 (41) ◽  
pp. 21661-21667
Author(s):  
Dongchuang Wu ◽  
Xinyue Wang ◽  
Linghao Shi ◽  
Kaiyue Jiang ◽  
Mengjia Wang ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
Catalytic Performance ◽  
Carbon Dioxide Conversion ◽  
Iron Cluster ◽  
Iron Clusters ◽  
Excellent Catalytic Performance

The atomic interfaces of iron cluster sites can easily transform CO2 to *COOH, resulting in excellent catalytic performance.

Highly biocompatible jujube polysaccharide-stabilized palladium nanoparticles with excellent catalytic performance

2019 ◽  
Vol 43 (20) ◽  
pp. 7646-7652 ◽  
Author(s):  
Xiaolei Guo ◽  
Jin Zhang ◽  
Yanshuai Cui ◽  
Shengfu Chen ◽  
Haotian Sun ◽  
...  
Keyword(s):  
Palladium Nanoparticles ◽  
Active Sites ◽  
Catalytic Performance ◽  
Excellent Catalytic Performance

Jujube polysaccharide-stabilized palladium nanoparticles provide active sites for efficient catalysis of 4-nitrophenol to 4-aminophenol.

scholarly journals Carbon Dioxide Photoreduction on the Bi2S3/MoS2 Catalyst

Catalysts ◽  
2019 ◽  
Vol 9 (12) ◽  
pp. 998 ◽  
Author(s):  
Kim ◽  
Kim ◽  
Do ◽  
Seo ◽  
Kang
Keyword(s):  
Carbon Dioxide ◽  
Light Absorption ◽  
Charge Separation ◽  
Effective Charge ◽  
Active Sites ◽  
Electron Excitation ◽  
Photocurrent Density ◽  
Catalytic Performance ◽  
Inorganic Materials ◽  
Composite Catalyst

The photocatalytic activity of a material is contingent on efficient light absorption, fast electron excitation, and control of the recombination rate by effective charge separation. Inorganic materials manufactured in unique shapes via controlled synthesis can exhibit significantly improved properties. Here, n-type Bi2S3 nanorods (with good optical activity) were wrapped with two-dimensional (2D) p-type MoS2 sheets, which have good light absorption properties. The designed p-n junction Bi2S3/MoS2 composite exhibited enhanced light absorption over the entire wavelength range, and higher carbon dioxide adsorption capacity and photocurrent density compared to the single catalysts. Consequently, the activity of the 1Bi2S3/1MoS2 composite catalyst for the photocatalytic reduction of carbon dioxide was more than 20 times higher than that of the single catalysts under visible-light irradiation at ≤400 nm, with partial selectivity for CO conversion. This is attributed to the p-n heterojunction Bi2S3/MoS2 composite designed in this study, the high light absorption of n-Bi2S3, accelerated electron excitation, and the electron affinity of the 2D sheet-p-MoS2, which quickly absorbed excited electrons, resulting in effective charge separation. This ultimately improved the catalytic performance by continuously supplying catalytically active sites to the heterojunction interfaces.

Boosting the Catalytic Performance of Organic Salts for the Fast and Selective Synthesis of α-Alkylidene Cyclic Carbonates from Carbon Dioxide and Propargylic Alcohols

ChemCatChem ◽  
2018 ◽  
Vol 10 (12) ◽  
pp. 2584-2592 ◽  
Author(s):  
Bruno Grignard ◽  
Charlène Ngassamtounzoua ◽  
Sandro Gennen ◽  
Bernard Gilbert ◽  
Raphaël Méreau ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
Catalytic Performance ◽  
Selective Synthesis ◽  
Cyclic Carbonates ◽  
Organic Salts ◽  
Propargylic Alcohols
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