scholarly journals Oxygen-deficient metal oxides supported nano-intermetallic InNi3C0.5 toward efficient CO2 hydrogenation to methanol

2021 ◽  
Vol 7 (32) ◽  
pp. eabi6012
Author(s):  
Chao Meng ◽  
Guofeng Zhao ◽  
Xue-Rong Shi ◽  
Pengjing Chen ◽  
Ye Liu ◽  
...  
Keyword(s):  
Metal Oxides ◽  
Oxygen Deficiency ◽  
Sulfur Poisoning ◽  
Intrinsic Activity ◽  
Grand Challenge ◽  
High Electron ◽  
Support Interaction ◽  
Highly Active ◽  
Metal Support Interaction ◽  
Metal Support

Direct CO2 hydrogenation to methanol using renewable energy–generated hydrogen is attracting intensive attention, but qualifying catalysts represents a grand challenge. Pure-/multi-metallic systems used for this task usually have low catalytic activity. Here, we tailored a highly active and selective InNi3C0.5/ZrO2 catalyst by tuning the performance-relevant electronic metal-support interaction (EMSI), which is tightly linked with the ZrO2 type–dependent oxygen deficiency. Highly oxygen-deficient monoclinic-ZrO2 support imparts high electron density to InNi3C0.5 because of the considerably enhanced EMSI, thereby enabling InNi3C0.5/monoclinic-ZrO2 with an intrinsic activity three or two times as high as that of InNi3C0.5/amorphous-ZrO2 or InNi3C0.5/tetragonal-ZrO2. The EMSI-governed catalysis observed in the InNi3C0.5/ZrO2 system is extendable to other oxygen-deficient metal oxides, in particular InNi3C0.5/Fe3O4, achieving 25.7% CO2 conversion with 90.2% methanol selectivity at 325°C, 6.0 MPa, 36,000 ml gcat−1 hour−1, and H2/CO2 = 10:1. This affordable catalyst is stable for at least 500 hours and is also highly resistant to sulfur poisoning.

Co-processing of hydrodeoxygenation and hydrodesulfurization of phenol and dibenzothiophene with NiMo/Al2O3–ZrO2 and NiMo/TiO2–ZrO2 catalysts

2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Jesús Andrés Tavizón Pozos ◽  
Gerardo Chávez Esquivel ◽  
Ignacio Cervantes Arista ◽  
José Antonio de los Reyes Heredia ◽  
Víctor Alejandro Suárez Toriello
Keyword(s):  
Active Sites ◽  
Reaction Rate ◽  
Supported Catalysts ◽  
Initial Reaction Rate ◽  
Initial Reaction ◽  
Competition Effect ◽  
Support Interaction ◽  
Highly Active ◽  
Metal Support Interaction ◽  
Metal Support

Abstract The influence of Al2O3–ZrO2 and TiO2–ZrO2 supports on NiMo-supported catalysts at a different sulfur concentration in a model hydrodeoxygenation (HDO)-hydrodesulfurization (HDS) co-processing reaction has been studied in this work. A competition effect between phenol and dibenzothiophene (DBT) for active sites was evidenced. The competence for the active sites between phenol and DBT was measured by comparison of the initial reaction rate and selectivity at two sulfur concentrations (200 and 500 ppm S). NiMo/TiO2–ZrO2 was almost four-fold more active in phenol HDO co-processed with DBT than NiMo/Al2O3–ZrO2 catalyst. Consequently, more labile active sites are present on NiMo/TiO2–ZrO2 than in NiMo/Al2O3–ZrO2 confirmed by the decrease in co-processing competition for the active sites between phenol and DBT. DBT molecules react at hydrogenolysis sites (edge and rim) preferentially so that phenol reacts at hydrogenation sites (edge and edge). However, the hydrogenated capacity would be lost when the sulfur content was increased. In general, both catalysts showed similar functionalities but different degrees of competition according to the highly active NiMoS phase availability. TiO2–ZrO2 as the support provided weaker metal-support interaction than Al2O3–ZrO2, generating a larger fraction of easily reducible octahedrally coordinated Mo- and Ni-oxide species, causing that NiMo/TiO2–ZrO2 generated precursors of MoS2 crystallites with a longer length and stacking but with a higher degree of Ni-promotion than NiMo/Al2O3–ZrO2 catalyst.

Ultrafine AuPd nanoparticles supported on amine functionalized monochlorotriazinyl β-cyclodextrin as highly active catalysts for hydrogen evolution from formic acid dehydrogenation

2020 ◽  
Vol 10 (15) ◽  
pp. 5281-5287 ◽  
Author(s):  
Xue Liu ◽  
Dawei Gao ◽  
Yue Chi ◽  
Hongli Wang ◽  
Zhili Wang ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Formic Acid ◽  
Hydrogen Evolution ◽  
Support Interaction ◽  
Highly Active ◽  
Amine Functionalized ◽  
Metal Support Interaction ◽  
Metal Support ◽  
Formic Acid Dehydrogenation ◽  
Strong Metal Support Interaction

Au0.3Pd0.7/A-M-β-CD exhibits remarkable catalytic activity for hydrogen evolution from formic acid, which is attributed to strong metal–support interaction.

Strong metal–support interaction improves activity and stability of Pt electrocatalysts on doped metal oxides

2018 ◽  
Vol 20 (13) ◽  
pp. 8765-8772 ◽  
Author(s):  
Ignacio Jiménez-Morales ◽  
Sara Cavaliere ◽  
Deborah Jones ◽  
Jacques Rozière
Keyword(s):  
Metal Oxides ◽  
Tin Oxide ◽  
Pt Nanoparticles ◽  
Support Interaction ◽  
Metal Support Interaction ◽  
Metal Support ◽  
Mass Activity ◽  
Pt Electrocatalysts ◽  
Carbon Based ◽  
Strong Metal Support Interaction

Niobium and antimony doped tin oxide loose-tubes decorated with Pt nanoparticles present outstanding mass activity and stability, exceeding those of a reference carbon-based electrocatalyst.

Metal–support interaction in Pd/CeO2 model catalysts for CO oxidation: from pulsed laser-ablated nanoparticles to highly active state of the catalyst

2016 ◽  
Vol 6 (17) ◽  
pp. 6650-6666 ◽  
Author(s):  
E. M. Slavinskaya ◽  
T. Yu. Kardash ◽  
O. A. Stonkus ◽  
R. V. Gulyaev ◽  
I. N. Lapin ◽  
...  
Keyword(s):  
Co Oxidation ◽  
Pulsed Laser ◽  
Active State ◽  
Model Catalysts ◽  
Support Interaction ◽  
Highly Active ◽  
Metal Support Interaction ◽  
Metal Support

Highly active Pd/CeO2 catalysts were synthesized from nanosized Pd and ceria obtained by PLA.

Highly active and stable Pd/MgAl2O4@MgO catalyst with electronic metal-support interaction for selective hydrogenation of isoprene

Fuel ◽  
2021 ◽  
Vol 289 ◽  
pp. 119920
Author(s):  
Zhou Yang ◽  
Shunqin Liang ◽  
Limin Sun ◽  
Xiaoli Hu ◽  
Weiping Fang ◽  
...  
Keyword(s):  
Selective Hydrogenation ◽  
Support Interaction ◽  
Highly Active ◽  
Metal Support Interaction ◽  
Metal Support

Ni-based catalysts supported on Mg–Al hydrotalcites with different morphologies for CO2 methanation: exploring the effect of metal–support interaction

2020 ◽  
Vol 10 (6) ◽  
pp. 1902-1913 ◽  
Author(s):  
Jie Ren ◽  
Chalachew Mebrahtu ◽  
Regina Palkovits
Keyword(s):  
Co2 Methanation ◽  
Support Interaction ◽  
Highly Active ◽  
Metal Support Interaction ◽  
Metal Support

Ni-based Mg–Al hydrotalcite catalysts with perfect morphologies were proven to be highly active and stable during CO2 methanation.

scholarly journals Recent In Situ/Operando Spectroscopy Studies of Heterogeneous Catalysis with Reducible Metal Oxides as Supports

Catalysts ◽  
2019 ◽  
Vol 9 (5) ◽  
pp. 477 ◽  
Author(s):  
Fei Wang ◽  
Jianzhun Jiang ◽  
Bin Wang
Keyword(s):  
Heterogeneous Catalysis ◽  
Metal Oxides ◽  
Metal Catalysts ◽  
Catalytic Reactions ◽  
Operando Spectroscopy ◽  
Support Interaction ◽  
Metal Support Interaction ◽  
Metal Support ◽  
Spectroscopy Studies

For heterogeneous catalysis, the metal catalysts supported on reducible metal oxides, especially CeO2 and TiO2, have long been a research focus because of their excellent catalytic performance in a variety of catalytic reactions. Detailed understanding of the promotion effect of reducible metal oxides on catalytic reactions is beneficial to the rational design of new catalysts. The important catalytic roles of reducible metal oxides are attributed to their intimate interactions with the supported metals (e.g., strong metal-support interaction, electronic metal-support interaction) and unique support structures (e.g., oxygen vacancy, reversible valence change, surface hydroxyl). However, the structures of the catalysts and reaction mechanisms are strongly affected by environmental conditions. For this reason, in situ/operando spectroscopy studies under working conditions are necessary to obtain accurate information about the structure-activity relationship. In this review, the recent applications of the in situ/operando spectroscopy methodology on metal catalysts with reducible metal oxides as supports are summarized.

Sign in / Sign up

Export Citation Format

Share Document