scholarly journals Studies of CO2 hydrogenation over cobalt/ceria catalysts with in situ characterization: the effect of cobalt loading and metal–support interactions on the catalytic activity

2020 ◽  
Vol 10 (19) ◽  
pp. 6468-6482 ◽  
Author(s):  
Kaixi Deng ◽  
Lili Lin ◽  
Ning Rui ◽  
Dimitriy Vovchok ◽  
Feng Zhang ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Metal Oxide ◽  
Catalytic Properties ◽  
Co2 Hydrogenation ◽  
In Situ Characterization ◽  
Control Activity ◽  
Metal Support ◽  
Metal Support Interactions ◽  
Ceria Catalysts

Metal–oxide interactions affect the catalytic properties of Co/CeO2 and can be used to control activity and selectivity.

Metal-Support Interactions and C1 Chemistry: Transforming Pt-CeO2 into a Highly Active and Stable Catalyst for the Conversion of Carbon Dioxide and Methane

2020 ◽  
Author(s):  
Feng Zhang ◽  
Ramón A. Gutiérrez ◽  
Pablo Lustemberg ◽  
Zongyuan Liu ◽  
Ning Rui ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
Metal Oxide ◽  
Elevated Temperatures ◽  
Chemical Properties ◽  
Oxide Interface ◽  
Highly Active ◽  
Metal Support ◽  
Metal Support Interactions ◽  
Methane Dissociation

There is an ongoing search for materials which can accomplish the activation of two dangerous greenhouse gases like carbon dioxide and methane. In the area of C1 chemistry, the reaction between CO2 and CH4 to produce syngas, known as methane dry reforming (MDR), is attracting a lot of interest due to its green nature. On Pt(111), elevated temperatures are necessary to activate the reactants and massive deposition of carbon makes this metal surface ineffective for the MDR process. In this study, we show that strong metal-support interactions present in Pt/CeO2(111) and Pt/CeO2 powders lead to systems which can bind well CO2 and CH4 at room temperature and are excellent and stable catalysts for the MDR process at moderate temperature (500 ºC). The behaviour of these systems was studied using a combination of in-situ/operando methods which pointed to an active Pt-CeO2-x interface. In this interface, the oxide is far from being a passive spectator. It modifies the chemical properties of Pt, facilitating improved methane dissociation, and is directly involved in the adsorption and dissociation of CO2 making the MDR catalytic cycle possible. A comparison of the benefits gained by the use of an effective metal-oxide interface and those obtained by plain bimetallic bonding indicates that the former is much more important when optimizing the C1 chemistry associated with CO2 and CH4 conversion. The presence of elements with a different chemical nature at the metal-oxide interface opens the possibility for truly cooperative interactions in the activation of C-O and C-H bonds.

scholarly journals Metal-Support Interactions and C1 Chemistry: Transforming Pt-CeO2 into a Highly Active and Stable Catalyst for the Conversion of Carbon Dioxide and Methane

2020 ◽  
Author(s):  
Feng Zhang ◽  
Ramón A. Gutiérrez ◽  
Pablo Lustemberg ◽  
Zongyuan Liu ◽  
Ning Rui ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
Metal Oxide ◽  
Elevated Temperatures ◽  
Chemical Properties ◽  
Oxide Interface ◽  
Highly Active ◽  
Metal Support ◽  
Metal Support Interactions ◽  
Methane Dissociation

There is an ongoing search for materials which can accomplish the activation of two dangerous greenhouse gases like carbon dioxide and methane. In the area of C1 chemistry, the reaction between CO2 and CH4 to produce syngas, known as methane dry reforming (MDR), is attracting a lot of interest due to its green nature. On Pt(111), elevated temperatures are necessary to activate the reactants and massive deposition of carbon makes this metal surface ineffective for the MDR process. In this study, we show that strong metal-support interactions present in Pt/CeO2(111) and Pt/CeO2 powders lead to systems which can bind well CO2 and CH4 at room temperature and are excellent and stable catalysts for the MDR process at moderate temperature (500 ºC). The behaviour of these systems was studied using a combination of in-situ/operando methods which pointed to an active Pt-CeO2-x interface. In this interface, the oxide is far from being a passive spectator. It modifies the chemical properties of Pt, facilitating improved methane dissociation, and is directly involved in the adsorption and dissociation of CO2 making the MDR catalytic cycle possible. A comparison of the benefits gained by the use of an effective metal-oxide interface and those obtained by plain bimetallic bonding indicates that the former is much more important when optimizing the C1 chemistry associated with CO2 and CH4 conversion. The presence of elements with a different chemical nature at the metal-oxide interface opens the possibility for truly cooperative interactions in the activation of C-O and C-H bonds.

Improved stability and activity of Fe-based catalysts through strong metal support interactions due to extrinsic oxygen vacancies in Ce0.8Sm0.2O2−δ for the efficient synthesis of ammonia

2020 ◽  
Vol 8 (32) ◽  
pp. 16676-16689 ◽  
Author(s):  
John Humphreys ◽  
Rong Lan ◽  
Shigang Chen ◽  
Shanwen Tao
Keyword(s):  
Catalytic Activity ◽  
Oxygen Vacancies ◽  
Ammonia Synthesis ◽  
Efficient Synthesis ◽  
Anion Vacancies ◽  
Metal Support ◽  
Improved Stability ◽  
Synthesis Catalysts ◽  
Metal Support Interactions

The SMSI between Fe and oxygen vacancies in Ce0.8Sm0.2O2−δ helps to weaken and break the strong NN bonds in N2, increasing the catalytic activity. Materials with anion vacancies improve oxygenate tolerance property of ammonia synthesis catalysts.

Enhancing metal–support interaction by in situ ion-exchanging strategy for high performance Pt catalysts in hydrogen evolution reaction

2020 ◽  
Vol 8 (32) ◽  
pp. 16582-16589 ◽  
Author(s):  
Xulei Sui ◽  
Lei Zhang ◽  
Junjie Li ◽  
Kieran Doyle-Davis ◽  
Ruying Li ◽  
...  
Keyword(s):  
Hydrogen Evolution ◽  
Hydrogen Evolution Reaction ◽  
High Performance ◽  
Pt Catalysts ◽  
Acidic Media ◽  
Support Interaction ◽  
Metal Support Interaction ◽  
Metal Support ◽  
Metal Support Interactions

A facile in situ ion-exchanging strategy directly enhances metal–support interactions between Pt and support and promotes HER electrocatalytic performance in acidic media.

A facile construction of Au nanoparticles on a copolymer ligand brushes modified graphene oxide nanoplatform with excellent catalytic properties

RSC Advances ◽  
2016 ◽  
Vol 6 (69) ◽  
pp. 64937-64945 ◽  
Author(s):  
Yajiao Song ◽  
Jianhua Lü ◽  
Bingxin Liu ◽  
Changli Lü
Keyword(s):  
Graphene Oxide ◽  
Catalytic Activity ◽  
Au Nanoparticles ◽  
Catalytic Properties ◽  
High Catalytic Activity ◽  
Au Nps ◽  
Modified Graphene Oxide ◽  
Modified Graphene ◽  
Copolymer Brush

Au NPs were generated via in situ reduction on copolymer brush P(OEGMA-co-MQ) functionalized GO. MQ units in the brushes as capping agents could stabilize the Au NPs. The Au NPs–GO hybrid exhibited high catalytic activity for the reduction of 4-NP.

Fabrication, characterization, and stability of supported single-atom catalysts

2017 ◽  
Vol 7 (19) ◽  
pp. 4250-4258 ◽  
Author(s):  
Yaxin Chen ◽  
Zhiwei Huang ◽  
Zhen Ma ◽  
Jianmin Chen ◽  
Xingfu Tang
Keyword(s):  
Catalytic Activity ◽  
Single Atom ◽  
Metal Support ◽  
Metal Support Interactions

Strong metal–support interactions are key requirements for development of stable single-atom catalysts with pronounced catalytic activity.

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