The visible-light-assisted thermocatalytic methanation of CO2 over Ru/TiO(2-x)Nx

Lin, Liuliu; Wang, Ke; Yang, Kai; Chen, Xun; Fu, Xianzhi; Dai, Wenxin

doi:10.1016/j.apcatb.2016.11.054

Cited by 117 publications

(76 citation statements)

References 76 publications

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“…Meanwhile, the apparent activation energy ( E a ) without significant difference (Figure S8) suggests that Ni/MCM‐41 samples show similar reaction pathway for CO 2 reduction. It should be emphasized that the exceptional activity of Ni/MCM‐41‐NH 3 ⋅ H 2 O catalyst for CO 2 methanation is close to the equilibrium value and is higher than that of the previously reported Ni‐based catalysts on the indicated conditions, especially under the high GHSV (Table S3) ,. Furthermore, the low activity (48.1 % of CO 2 conversion) obtained for the reference sample of NaOH‐treated Ni/MCM‐41‐NH 3 ⋅ H 2 O confirms the negative effect of Na on Ni 0 generation and the cooperative catalysis of Ni and NiO species.…”

Section: Resultssupporting

confidence: 62%

“…As depicted in that the exceptional activity of Ni/MCM-41-NH 3 · H 2 O catalyst for CO 2 methanation is close to the equilibrium value and is higher than that of the previously reported Ni-based catalysts on the indicated conditions, especially under the high GHSV (Table S3). [14][15][16][17][18][19][20][33][34][35][36][37] Furthermore, the low activity (48.1 % of CO 2 conversion) obtained for the reference sample of NaOH-treated Ni/MCM-41-NH 3 · H 2 O confirms the negative effect of Na on Ni 0 generation and the cooperative catalysis of Ni and NiO species.…”

Section: Resultsmentioning

confidence: 77%

“…However, the major challenge is the high thermodynamic stability of CO 2 molecules and the activation energy barriers of the reaction involved CO 2 are always very high. Hydrogenation of CO 2 toward methane (CO 2 +4H 2 →CH 4 +2H 2 O), the well‐known Sabatier reaction or methanation reaction, has been extensively studied using many kinds of active supported Ru, Pd, Fe, Co, and Ni catalysts . Amongst them, Ni‐based materials are the most commonly investigated for industrial purposes because of their high catalytic performance and low cost …”

Section: Introductionmentioning

confidence: 99%

“…In spite of the great research efforts in the field of CO 2 hydrogenation for methane formation, the understanding of the active sites and surface chemical state of real catalyst on practical reaction conditions as well as the potential key intermediates for CO 2 methanation is still limited. Many in situ techniques can be employed to probe these significant and air‐sensitive species.…”

Section: Introductionmentioning

confidence: 99%

“…Hydrogenation of CO 2 toward methane (CO 2 + 4H 2 !CH 4 + 2H 2 O), the wellknown Sabatier reaction or methanation reaction, has been extensively studied using many kinds of active supported Ru, Pd, Fe, Co, and Ni catalysts. [14][15][16][17][18] Amongst them, Ni-based materials are the most commonly investigated for industrial purposes because of their high catalytic performance and low cost. [17][18][19][20] In spite of the great research efforts in the field of CO 2 hydrogenation for methane formation, [14][15][16][17][18][19][20] the understanding of the active sites and surface chemical state of real catalyst on practical reaction conditions as well as the potential key intermediates for CO 2 methanation is still limited.…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Cooperative Catalysis of Nickel and Nickel Oxide for Efficient Reduction of CO₂ to CH₄

Huang

Yin

et al. 2019

ChemCatChem

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The use of CO2 to produce value‐added energy chemicals is a promising means for renewable CO2 transformation in low‐carbon energy system, and CO2 methanation has attracted ever‐increasing interest. Herein, we report that the Ni/MCM‐41 catalyst with prominent cooperative effect of Ni and NiO is efficient for CH4 generation with CO2 conversion of 73.2 % and CH4 selectivity of 91.6 % at 400 °C and high gas hourly space velocity (GHSV) of 90000 mL gcat−1 h−1. Combined methodologies of in situ X‐ray diffraction, diffuse reflectance infrared Fourier transform spectroscopy, and ambient‐pressure X‐ray photoelectron spectroscopy reflect the structural evolvements of Ni/MCM‐41 catalyst, the presence of carbonyl intermediates, the co‐existence of metallic and oxidized Ni species with sufficient molar ratio of Ni0/Ni2+ under working conditions. H2 and CO2 molecules are preferentially adsorbed and chemically activated over Ni0 and Ni2+ species, respectively. The possible four‐step reaction mechanism involved carbonyl pathway and the cleavage of C=O bond from CO2 as the rate‐determining step over the engineered Ni/MCM‐41 catalyst was demonstrated.

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Section: Resultssupporting

confidence: 62%

Section: Resultsmentioning

confidence: 77%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Cooperative Catalysis of Nickel and Nickel Oxide for Efficient Reduction of CO₂ to CH₄

Huang

Yin

et al. 2019

ChemCatChem

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Schottky Junction and D–A₁–A₂ System Dual Regulation of Covalent Triazine Frameworks for Highly Efficient CO₂ Photoreduction

Wang,

et al. 2023

Advanced Materials

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Covalent triazine frameworks (CTFs) are emerging as a promising molecular platform for photocatalysis. Nevertheless, the construction of highly effective charge transfer pathways in CTFs for oriented delivery of photoexcited electrons to enhance the photocatalytic performance remains highly challenging. Herein, we presented a molecular engineering strategy to achieve highly efficient charge separation and transport in both the lateral and vertical directions for solar‐to‐formate conversion. Specifically, a large π‐delocalized and π‐stacked Schottky junction (Ru‐Th‐CTF/RGO) that synergistically knitted a rebuilt extended π‐delocalized network of the D–A1–A2 system (multiple donor or acceptor units, Ru‐Th‐CTF) with reduced graphene oxide (RGO) was developed. We have verified that the single‐site Ru units in Ru‐Th‐CTF/RGO acted as effective secondary electron acceptors in the lateral direction for multistage charge separation/transport. Simultaneously, the π‐stacked and covalently bonded graphene was regarded as a hole extraction layer, accelerating the separation/transport of the photogenerated charges in the vertical direction over the Ru‐Th‐CTF/RGO Schottky junction with full use of photogenerated electrons for the reduction reaction. Thus, the obtained photocatalyst had an excellent CO2‐to‐formate conversion rate (∼11050 μmol g−1 h−1) and selectivity (∼99%), producing a state‐of‐the‐art catalyst for the heterogeneous conversion of CO2 to formate without an extra photosensitizer.This article is protected by copyright. All rights reserved

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Von Sonnenlicht zu Brennstoffen: aktuelle Fortschritte der C₁‐Solarchemie

et al. 2019

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Die katalytische C1‐Chemie auf der Grundlage der Aktivierung/Umwandlung von Synthesegas (CO+H2), Methan, Kohlendioxid und Methanol verfügt über enormes Potential für die Entwicklung nachhaltiger Kohlenwasserstoffbrennstoffe als Ersatz für Öl, Kohle und Erdgas. Herkömmliche thermisch‐katalytische Verfahren zur C1‐Umsetzung benötigen hohe Temperaturen und Drücke und sind daher mit einem großen CO2‐Fußabdruck verbunden. Dagegen bietet die solargetriebene C1‐Katalyse einen umweltfreundlichen und nachhaltigen Weg für die Herstellung von Brennstoffen und anderen chemischen Grundstoffen, wenn auch die Umwandlungseffizienzen noch zu niedrig für industrielle Wirtschaftlichkeit sind. In unserem Aufsatz beleuchten wir aktuelle Fortschritte und Meilensteine der C1‐Solarchemie, einschließlich der solaren Fischer‐Tropsch‐Synthese, Wassergas‐Shift‐Reaktion, CO2‐Hydrierung, Methan‐ und Methanolumwandlung. Ein besonderer Schwerpunkt liegt auf der rationalen Entwicklung von Katalysatoren, Struktur‐Reaktivitäts‐Beziehungen und Reaktionsmechanismen. Strategien für die Hochskalierung solargetriebener C1‐Verfahren werden ebenfalls diskutiert.

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The visible-light-assisted thermocatalytic methanation of CO2 over Ru/TiO(2-x)Nx

Cited by 117 publications

References 76 publications

Cooperative Catalysis of Nickel and Nickel Oxide for Efficient Reduction of CO₂ to CH₄

Cooperative Catalysis of Nickel and Nickel Oxide for Efficient Reduction of CO₂ to CH₄

Schottky Junction and D–A₁–A₂ System Dual Regulation of Covalent Triazine Frameworks for Highly Efficient CO₂ Photoreduction

Von Sonnenlicht zu Brennstoffen: aktuelle Fortschritte der C₁‐Solarchemie

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The visible-light-assisted thermocatalytic methanation of CO2 over Ru/TiO(2-x)Nx

Cited by 117 publications

References 76 publications

Cooperative Catalysis of Nickel and Nickel Oxide for Efficient Reduction of CO2 to CH4

Cooperative Catalysis of Nickel and Nickel Oxide for Efficient Reduction of CO2 to CH4

Schottky Junction and D–A1–A2 System Dual Regulation of Covalent Triazine Frameworks for Highly Efficient CO2 Photoreduction

Von Sonnenlicht zu Brennstoffen: aktuelle Fortschritte der C1‐Solarchemie

Contact Info

Product

Resources

About

Cooperative Catalysis of Nickel and Nickel Oxide for Efficient Reduction of CO₂ to CH₄

Cooperative Catalysis of Nickel and Nickel Oxide for Efficient Reduction of CO₂ to CH₄

Schottky Junction and D–A₁–A₂ System Dual Regulation of Covalent Triazine Frameworks for Highly Efficient CO₂ Photoreduction

Von Sonnenlicht zu Brennstoffen: aktuelle Fortschritte der C₁‐Solarchemie