Oxygen vacancies in Ru/TiO2 - drivers of low-temperature CO2 methanation assessed by multimodal operando spectroscopy

Cisneros, Sebastián; Abdel‐Mageed, Ali M.; Mosrati, Jawaher; Bartling, Stephan; Rockstroh, Nils; Atia, Hanan; Abed, Hayder; Rabeah, Jabor; Brückner, Angelika

doi:10.1016/j.isci.2022.103886

Cited by 17 publications

(2 citation statements)

References 78 publications

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“… 38 , 39 Recent studies have also verified that TiO 2 , which has the merits of being non-toxic, chemically stable, and structurally stable, is commonly applied to disperse highly reactive metal-based materials. 40 , 41 , 42 , 43 TiO2 is active toward the NO 2 − RR, and its catalytic efficiency can be further improved by P or V doping. 19 , 44 , 45 We thus believe that CoP@TiO 2 composite can effectively catalyze the NO 2 − -to-NH 3 conversion, which however has not been addressed so far.…”

Section: Introductionmentioning

confidence: 99%

High-efficiency electrocatalytic nitrite reduction toward ammonia synthesis on CoP@TiO2 nanoribbon array

Yao

et al. 2023

iScience

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Section: Introductionmentioning

confidence: 99%

High-efficiency electrocatalytic nitrite reduction toward ammonia synthesis on CoP@TiO2 nanoribbon array

Yao

et al. 2023

iScience

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“…Cu/CeO 2 -TiO 2 catalysts with different Ce/Ti molar ratios were prepared by a supercritical fluid-assisted sol-gel method which is reported in detail in previous publications. [14,30] In all catalysts the Cu loading was kept well below 0.1 wt. % to ensure atomic dispersion of Cu species (see more information in Ref.…”

Section: Catalyst Preparationmentioning

confidence: 99%

Controlling Activity of Heterogeneous Cu Single‐Atom Catalysts by Fine‐Tuning the Redox Properties of CeO₂‐TiO₂ Supports

et al. 2023

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Understanding and enhancing the activity of heterogeneous single-atom catalysts (SACs) are indispensable aspects to use them in industrial applications. Among these, low-temperature CO oxidation is considered as a model reaction for testing a wide-range of oxidation catalysts, and as an essential process for the exhaust aftertreatment in modern combustion engines. This study demonstrates that the activity of heterogeneous Cu/ CeO 2 À TiO 2 SAC catalysts can be fine-tuned by controlling the Ce/Ti ratio in CeO 2 À TiO 2 supports, with the highest catalytic activity achieved for a Ce/Ti molar ratio of 0.18. Based on DRIFT, EEL, and EPR spectroscopies, together with high-resolution electron microscopy and H 2 -TPR measurements, it is inferred that the optimized Ce/Ti ratio correlates with i) highest dispersion of separate CeO 2 particles on TiO 2 surface, ii) more facile reduction of Ce 4 + to Ce 3 + , and iii) enhanced formation of À Cu 2 + À OÀ Ce 4 + À .À Cu + À &À Ce 3 + À redox shuttles, which play a dual role for CO adsorption and O 2 -activation. These results extend the understanding of heterogeneous metal single-atom catalysts and constitute a robust approach for the rational control of their catalytic performance in technically relevant applications.

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Low Temperature Sabatier CO₂ Methanation

Molinet‐Chinaglia,

Shafiq,

Serp

2024

ChemCatChem

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The CO2 methanation reaction, or Sabatier reaction, is experiencing renewed interest in the context of large‐scale recycling of point CO2 emissions, leading to the power‐to‐gas technology. The reaction represents a flexible route to transform CO2 into methane by hydrogenation with (green) dihydrogen. This exothermic transformation takes place at a reasonable rate at temperatures above 200 °C and is directed to the targeted product at low temperatures. The CO2 methanation nevertheless remains kinetically limited due to the chemical stability of CO2 and the high bond dissociation energy for C=O in CO2. Therefore, the current urgent demand is for the development of catalysts and associated processes with superior activity for CO2 activation at low temperatures. This critical review aims to overview the state of the art of this low‐temperature technology using thermal, plasma and photo‐assisted catalysis. We summarize research advances around low‐temperature CO2 methanation, focusing on catalyst formulations (metal, supports and promoters), reaction mechanisms and suitable activation processes. We discuss each of these critical aspects of the technology and identify the main challenges and opportunities for low temperature (≤ 200 °C) CO2 methanation.

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Oxygen vacancies in Ru/TiO2 - drivers of low-temperature CO2 methanation assessed by multimodal operando spectroscopy

Cited by 17 publications

References 78 publications

High-efficiency electrocatalytic nitrite reduction toward ammonia synthesis on CoP@TiO2 nanoribbon array

High-efficiency electrocatalytic nitrite reduction toward ammonia synthesis on CoP@TiO2 nanoribbon array

Controlling Activity of Heterogeneous Cu Single‐Atom Catalysts by Fine‐Tuning the Redox Properties of CeO₂‐TiO₂ Supports

Low Temperature Sabatier CO₂ Methanation

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Oxygen vacancies in Ru/TiO2 - drivers of low-temperature CO2 methanation assessed by multimodal operando spectroscopy

Cited by 17 publications

References 78 publications

High-efficiency electrocatalytic nitrite reduction toward ammonia synthesis on CoP@TiO2 nanoribbon array

High-efficiency electrocatalytic nitrite reduction toward ammonia synthesis on CoP@TiO2 nanoribbon array

Controlling Activity of Heterogeneous Cu Single‐Atom Catalysts by Fine‐Tuning the Redox Properties of CeO2‐TiO2 Supports

Low Temperature Sabatier CO2 Methanation

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Product

Resources

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Controlling Activity of Heterogeneous Cu Single‐Atom Catalysts by Fine‐Tuning the Redox Properties of CeO₂‐TiO₂ Supports

Low Temperature Sabatier CO₂ Methanation