Journal ArticleDOI
Optimizing Active Sites for High CO Selectivity during CO2 Hydrogenation over Supported Nickel Catalysts
Thalita S. Galhardo,Adriano H. Braga,Bruno H. Arpini,János Szanyi,Renato V. Gonçalves,Bruno F. Zornio,Caetano R. Miranda,Liane M. Rossi +7 more
TLDR
In this paper, the selectivity of supported Ni catalysts prepared by the traditional impregnation method was investigated and it was shown that the selected Ni catalyst has a high selectivity.Abstract:
Controlling the selectivity of CO2 hydrogenation catalysts is a fundamental challenge. In this study, the selectivity of supported Ni catalysts prepared by the traditional impregnation method was f...read more
Citations
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Journal ArticleDOI
Unlocking the Catalytic Potential of TiO2-Supported Pt Single Atoms for the Reverse Water-Gas Shift Reaction by Altering Their Chemical Environment.
Linxiao Chen,Raymond R. Unocic,Adam S. Hoffman,Jiyun Hong,Adriano H. Braga,Zhenghong Bao,Simon R. Bare,János Szanyi +7 more
TL;DR: A reduction–oxidation cycle that induces nearly 5-fold activity enhancement on Pt/TiO2 SACs for the reverse water–gas shift (rWGS) reaction is reported, offering desired understanding on the rarely explored dynamic chemical environment of supported single metal atoms and its catalytic consequences.
Journal ArticleDOI
Ni–Zn Dual Sites Switch the CO2 Hydrogenation Selectivity via Tuning of the d-Band Center
Shu Lin,Maoshuai Li,Ziwen Hao,Yutong Pan,Xiaoyu Han,Xiaoqian Chang,Shou-Jun Huang,Zhenhua Li,Xinbin Ma +8 more
TL;DR: In this article , the authors examined the interrelation between active sites and reaction pathways in Ni-catalyzed CO2 hydrogenation and identified the crucial intermediates that impacted the product selectivity.
Journal ArticleDOI
Graphene Aerogel Supported Ni for CO2 Hydrogenation to Methane
Posted ContentDOI
Quantifying the Impact of Parametric Uncertainty on Automatic Mechanism Generation for CO2 Hydrogenation on Ni(111).
Bjarne Kreitz,Bjarne Kreitz,Khachik Sargsyan,Katrin Blondal,Emily Mazeau,Richard H. West,Gregor D. Wehinger,Thomas Turek,C. Franklin Goldsmith +8 more
TL;DR: Comparison of the model predictions with experimental data on a Ni/SiO2 catalyst find a feasible set of microkinetic mechanisms that are in quantitative agreement with the measured data, without relying on explicit parameter optimization.
Journal ArticleDOI
Formation and influence of surface hydroxyls on product selectivity during CO2 hydrogenation by Ni/SiO2 catalysts
Tiancheng Pu,Tiancheng Pu,Liang Shen,Xianglin Liu,Xinyu Cao,Jing Xu,Israel E. Wachs,Minghui Zhu +7 more
TL;DR: In this paper, the authors characterized surface hydroxyl formation on metallic Ni sites and Ni-SiO2 interfacial region of Ni/SiO 2 during CO2 hydrogenation with the aid of H2-TPR, CO-Tpr, quasi in situ XPS and in situ DRIFTS of adsorbed CO.
References
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Journal ArticleDOI
Hydrogenation of CO2 into hydrocarbons: Enhanced catalytic activity over Fe-based Fischer-Tropsch catalysts
TL;DR: In this article, a K or/and Co (Ru) component is introduced onto precipitated Fe catalysts to promote the conversion of the CO intermediate in the FTS stage.
Journal ArticleDOI
Silica accelerates the selective hydrogenation of CO 2 to methanol on cobalt catalysts
Lingxiang Wang,Erjia Guan,Yeqing Wang,Liang Wang,Zhongmiao Gong,Yi Cui,Xiangju Meng,Bruce C. Gates,Feng-Shou Xiao,Feng-Shou Xiao +9 more
TL;DR: As a support and ligand, silica boosts cobalt catalysts to selectively hydrogenate CO2 into the desired methanol product, providing support for rationally controlling these reaction pathways.
Journal ArticleDOI
Reverse Water-Gas Shift or Sabatier Methanation on Ni(110)? Stable Surface Species at Near-Ambient Pressure.
Matteo Roiaz,Enrico Monachino,Carlo Dri,Carlo Dri,Mark T. Greiner,Axel Knop-Gericke,Robert Schlögl,Giovanni Comelli,Giovanni Comelli,Erik Vesselli,Erik Vesselli +10 more
TL;DR: The stability of ethylidyne is deduced on the basis of the spectroscopic observations of CO, which stems from the dissociation of CO2 into CO + O in the reverse water-gas shift mechanism and a reactive species that undergoes direct conversion in the Sabatier methanation process.
Journal ArticleDOI
Thermodynamics of hydrogen production by the steam reforming of butanol: Analysis of inorganic gases and light hydrocarbons
G.A. Nahar,S.S. Madhani +1 more
TL;DR: In this article, the Gibbs free-energy minimization method was used to simulate the thermodynamics of butanol steam reformation for the production of hydrogen and carbon monoxide using a Gibbs free energy minimisation method with water-butanol molar feed ratios (WBFR) between 1 and 18, a pressure range of 1-50 bar and reaction temperatures from 300 to 900 °C.
Journal ArticleDOI
Size-tunable Ni nanoparticles supported on surface-modified, cage-type mesoporous silica as highly active catalysts for CO2 hydrogenation
Ching-Shiun Chen,Ching-Shiun Chen,Canggih Setya Budi,Hung Chi Wu,Diganta Saikia,Hsien Ming Kao +5 more
TL;DR: In this article, ultrasmall Ni nanoparticles (Ni NPs) were controllably supported in the cage-type mesopores of −COOH-functionalized mesoporous silica SBA-16 (denoted as Ni(x)@S16C, where x is the Ni loading) via wet impregnation under alkaline conditions, followed by thermal reduction.