Ni-TiO2 catalysts derived from metal-organic framework for efficient photo-thermal CO2 methanation

Li, Peng; Zhang, Senlin; Xiao, Zhourong; Zhang, Hui; Ye, Fei; Gu, Jianmin; Wang, Jidong; Li, Guozhu; Wang, Desong

doi:10.1016/j.fuel.2023.129817

Cited by 10 publications

(2 citation statements)

References 64 publications

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“…The huge absorbance difference between P25 and 3.5%Ni/P25 in the visible range can be explained distinctly by the color change of both samples, which contributed to the superior catalytic performance to that of the thermal and photo-catalysis (Figure S8). 54 In addition, the Tauc's band gap plots were obtained from the UV−vis DRS spectra of P25 and Ni/P25 (Figure 11b), and the band gaps were estimated to be 3.0 2.9, 2.9, and 2.9 eV for P25, 2%Ni/P25, 3.5%Ni/P25, and 5%Ni/P25, respectively.…”

Section: ■ Results and Discussionmentioning

confidence: 99%

Photo-thermal Catalytic Hydrogenation of Halogenated Nitrobenzenes over Ni/P25 Catalyst

Bai,

Xu,

et al. 2024

Langmuir

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As haloanilines (HANs) are important organic intermediates and fine chemicals, their preparation over non-noble-metal-based catalysts by catalytic hydrogenation has attracted wide attention. However, the reaction suffers from relatively harsh conditions. Herein, we found that a 3.5%Ni/P25 catalyst exhibited superior photo-thermal catalytic activity with a TOF s of 5207 h −1 for hydrogenation of p-chloronitrobenzene (p-CNB) to p-chloroaniline under a 300 W full spectrum, which was much higher than that of photo-and thermal catalysis alone. Moreover, the 3.5% Ni/P25 catalyst could be recycled 4 times and was effective for the hydrogenation of various halonitrobenzenes (HNBs) with superior selectivity. Furthermore, the kinetic research showed that the excellent catalytic performance could be attributed to the better activation and dissociation of H 2 by photo-thermal catalysis and the hydrogenation of p-CNB obeyed the condensation routine by ionic hydrogenation over 3.5%Ni/P25.

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Section: ■ Results and Discussionmentioning

confidence: 99%

Photo-thermal Catalytic Hydrogenation of Halogenated Nitrobenzenes over Ni/P25 Catalyst

Bai,

Xu,

et al. 2024

Langmuir

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“…But, the biggest drawback of Ni-based catalysts currently is their relatively low selectivity for reforming, which can easily be accompanied by side reactions such as carbon deposition. In addition, due to the relatively low Taman temperature of Ni metal (591 • C), and that the temperature of the reforming reaction is generally higher than its Taman temperature, the active component Ni is prone to sintering and agglomeration, greatly reducing the service life of the catalyst [23][24][25].…”

Section: Introductionmentioning

confidence: 99%

Perovskite-Derivative Ni-Based Catalysts for Hydrogen Production via Steam Reforming of Long-Chain Hydrocarbon Fuel

Guo,

Zhang,

Zhang

et al. 2024

Catalysts

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Large-scale hydrogen production by the steam reforming of long-chain hydrocarbon fuel is highly desirable for fuel-cell application. In this work, LaNiO3 perovskite materials doped with different rare earth elements (Ce, Pr, Tb and Sm) were prepared by a sol-gel method, and the derivatives supported Ni-based catalysts which were successfully synthesized by hydrogen reduction. The physicochemical properties of the as-prepared catalysts were characterized by powder X-ray diffraction, high-resolution transmission electron microscopy, N2 adsorption–desorption isotherms, H2 temperature-programmed reduction, and X-ray photoelectron spectroscopy. The catalytic performance of the as-prepared catalysts for hydrogen production was investigated via the steam reforming of n-dodecane. The results showed that the catalyst forms perovskite oxides after calcination with abundant mesopores and macropores. After reduction, Ni particles were uniformly distributed on perovskite derivatives, and can effectively reduce the particles’ sizes by doping with rare earth elements (Ce, Pr, Tb and Sm). Compared with the un-doped catalyst, the activity and hydrogen-production rate of the catalysts are greatly improved with rare earth element (Ce, Pr, Tb and Sm)-doped catalysts, as well as the anti-carbon deposition performance. This is due to the strong interaction between the uniformly distributed Ni particles and the support, as well as the abundant oxygen defects on the catalyst surface.

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Modulation of Selectivity and Activity of Ni/TiO₂ Catalysts by Metal Dispersion in Photothermal CO₂ Hydrogenation

Alfonso‐González,

Iglesias‐Juez,

Fresno

et al. 2024

ChemCatChem

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Ni/TiO2 catalysts are efficient and cost‐effective for photothermal CO2 hydrogenation. However, the achieved CO/CH4 ratio strongly depends on the specific characteristics of these catalysts. To further ascertain the role of metal dispersion and photoactivation on selectivity, in this work we investigate the impact of Ni loading over high surface area anatase on the photothermal performance. Catalysts with 3 and 10 wt. % of Ni prepared by incipient wetness impregnation show initial good dispersion of the metal, although after activation in H2 metallic Ni nanoparticles are observed for 10%Ni/TiO2. This last catalyst demonstrates superior CO2 hydrogenation activity at high temperature, but below 200 ºC it is overpassed by the catalyst with 3 wt % Ni/TiO2. The selectivity varies remarkably with Ni loadings. Thus, at 350 °C about 93 % of methane is obtained over 10 wt.% Ni/TiO2, while 3%Ni/TiO2 yields about 97 % of CO. Low‐intensity UV irradiation enhances performance, particularly at temperatures below 200 ºC, where an increment in the production of methane of up to 75 % is observed for 3 wt.% Ni/TiO2 at 200 ºC. These results highlight the influence of metal dispersion, along with irradiation on modulating the selectivity of the photothermal CO2 hydrogenation

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Ni-TiO2 catalysts derived from metal-organic framework for efficient photo-thermal CO2 methanation

Cited by 10 publications

References 64 publications

Photo-thermal Catalytic Hydrogenation of Halogenated Nitrobenzenes over Ni/P25 Catalyst

Photo-thermal Catalytic Hydrogenation of Halogenated Nitrobenzenes over Ni/P25 Catalyst

Perovskite-Derivative Ni-Based Catalysts for Hydrogen Production via Steam Reforming of Long-Chain Hydrocarbon Fuel

Modulation of Selectivity and Activity of Ni/TiO₂ Catalysts by Metal Dispersion in Photothermal CO₂ Hydrogenation

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Ni-TiO2 catalysts derived from metal-organic framework for efficient photo-thermal CO2 methanation

Cited by 10 publications

References 64 publications

Photo-thermal Catalytic Hydrogenation of Halogenated Nitrobenzenes over Ni/P25 Catalyst

Photo-thermal Catalytic Hydrogenation of Halogenated Nitrobenzenes over Ni/P25 Catalyst

Perovskite-Derivative Ni-Based Catalysts for Hydrogen Production via Steam Reforming of Long-Chain Hydrocarbon Fuel

Modulation of Selectivity and Activity of Ni/TiO2 Catalysts by Metal Dispersion in Photothermal CO2 Hydrogenation

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Modulation of Selectivity and Activity of Ni/TiO₂ Catalysts by Metal Dispersion in Photothermal CO₂ Hydrogenation