Enhanced CH<sub>4</sub> Selectivity in CO<sub>2</sub> Hydrogenation on Bimetallic Pt–Ni Catalysts with Pt Nanoparticles Modified by Isolated Ni Atoms

Chen, Min; Li, Bolang; Wang, Fei; Fang, Jinhou; Li, Kai; Zhang, Changbin

doi:10.1021/acsanm.3c00230

Cited by 8 publications

(3 citation statements)

References 49 publications

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“…Combining noble metals with other metals can change the electronic structure of their surfaces, which will affect the adsorption of the reaction substrate by the catalyst, resulting in different selectivity in the hydrogenation reaction. cated a Pt-Ni/γ-Al2O3 catalyst, which is composed of Pt NPs with surrounding Ni atoms and supported on γ-Al2O3 [91]. Different from the hydrogenation of CO2 by Pt/γ-Al2O3 and Ni/γ-Al2O3, the Pt-Ni/γ-Al2O3 catalyst can hydrogenate CO2 to formate and further hydrogenate to CH4.…”

Section: Selective Hydrogenation Reactionmentioning

confidence: 99%

Dimension Engineering in Noble-Metal-Based Nanocatalysts

Liu,

Yang,

et al. 2023

Catalysts

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Catalysts play a pivotal role in modern industries, such as energy, pharmaceuticals, and petrochemicals, serving as cornerstone of high-tech production. Noble metals, such as gold, silver, and platinum group elements, possess the superb catalytic characteristics of high-temperature oxidation resistance, corrosion resistance, stable electrochemical performance, high catalytic activity, and so on. These characteristics offer excellent prospects for applications in catalysis. In this review, we summarize innovative approaches to regulating the size and morphology of nano-noble metal catalysts with different dimensions. We also showcase typical prominent examples of their applications in exhaust gas purification, battery manufacturing, water splitting, and selective hydrogenation. Finally, perspectives are discussed in terms of future research opportunities in the realm of noble metal nanocatalysts.

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Section: Selective Hydrogenation Reactionmentioning

confidence: 99%

Dimension Engineering in Noble-Metal-Based Nanocatalysts

Liu,

Yang,

et al. 2023

Catalysts

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“…Pt-based catalysts have been widely explored for the RWGS reaction due to their excellent hydrogenation ability. ,− However, the relatively weak binding of CO 2 on Pt and high activation energy of C–O bond cleavage due to the low oxophilicity of Pt render low activity for RWGS reaction. , Alloying Pt with transition metals, such as Ni, Co, and W, can alter the electronic property of Pt and has been reported to be able to enhance the activity of RWGS reaction. At the same time, CH 4 is usually observed as a side product. − On the other hand, a combination of Pt with an oxophilic metal oxide (such as TiO 2 , CeO 2 , ReO x , and MoO 3 ) as a support or promoter has also been widely explored. ,,,,, In this case, Pt provides the functionality of hydrogenation, and the oxophilic (reducible) metal oxide facilitates the activation of CO 2 at the oxygen vacancies.…”

Section: Introductionmentioning

confidence: 99%

Tuning Interfacial Sites of WO_x/Pt for Enhancing Reverse Water Gas Shift Reaction

Bi,

Wang,

Zhang

et al. 2024

ACS Catal.

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Catalytic reverse water gas shift (RWGS) reaction has been regarded as an attractive route for the conversion of waste CO 2 to valuable CO. Despite Pt being facile for hydrogenation, the low oxophilicity of Pt renders it less active for RWGS at low temperatures. Herein, Pt/SiO 2 catalysts modified by WO x have been prepared to tune the WO x /Pt interfacial site for enhancing the RWGS reaction. Characterizations revealed the coverage of Pt particles by WO x clusters (polytungstate with a low polymerization degree) with an electron transfer from Pt to WO x . As a result, new WO x /Pt interfacial sites are created at the expense of surface-accessible Pt sites, which weaken CO adsorption while enhancing CO 2 adsorption and activation at the interface. The intrinsic reaction rate and turnover frequency on Pt−W/SiO 2 with an optimal W loading (0.5 wt %) are ∼8 and ∼12 times higher than those on Pt/SiO 2 at 400 °C, with a 100% CO selectivity, pointing to an optimal WO x /Pt interfacial sites resulting from optimal coverage of Pt by WO x . Reaction kinetics, infrared spectroscopy, and density functional theory calculations collectively revealed that the RWGS shifted from the association mechanism via the carboxyl intermediate on bare Pt to the redox mechanism at the interfacial perimeter site of WO x /Pt. The interfacial sites of WO x /Pt enable both C−O breakage and H−O formation, which synergistically enhance the activity. This work demonstrated a simple strategy to tune the metal/oxide interfacial sites, which can apply to other reactions that require multiple functionalities and take place at the metal/oxide interface.

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“…While Cu-based catalysts have shown encouraging selectivity towards CO and CH 3 OH, their CO 2 conversion rates leave much to be desired [12,13]. On the other hand, Ni-based catalysts have demonstrated considerable catalytic conversion under mild conditions, favoring the production of CH 4 over CO and CH 3 OH [14,15]. However, CO, a crucial building block for synthetic fuels and oxygenates via Fischer-Tropsch or methanol synthesis reactions, is the more desirable product [16].…”

Section: Introductionmentioning

confidence: 99%

CO2 to Value-Added Chemicals: Synthesis and Performance of Mono- and Bimetallic Nickel–Cobalt Nanofiber Catalysts

Schossig,

Gandotra,

Arizapana

et al. 2023

Catalysts

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In an epoch dominated by escalating concerns over climate change and looming energy crises, the imperative to design highly efficient catalysts that can facilitate the sequestration and transformation of carbon dioxide (CO2) into beneficial chemicals is paramount. This research presents the successful synthesis of nanofiber catalysts, incorporating monometallic nickel (Ni) and cobalt (Co) and their bimetallic blend, NiCo, via a facile electrospinning technique, with precise control over the Ni/Co molar ratios. Application of an array of advanced analytical methods, including SEM, TGA–DSC, FTIR-ATR, XRD, Raman, XRF, and ICP-MS, validated the effective integration and homogeneous distribution of active Ni/Co catalysts within the nanofibers. The catalytic performance of these mono- and bimetallic Ni/Co nanofiber catalysts was systematically examined under ambient pressure conditions for CO2 hydrogenation reactions. The bimetallic NiCo nanofiber catalysts, specifically with a Ni/Co molar ratio of 1:2, and thermally treated at 1050 °C, demonstrated a high CO selectivity (98.5%) and a marked increase in CO2 conversion rate—up to 16.7 times that of monometallic Ni nanofiber catalyst and 10.8 times that of the monometallic Co nanofiber catalyst. This significant enhancement in catalytic performance is attributed to the improved accessibility of active sites, minimized particle size, and the strong Ni–Co–C interactions within these nanofiber structures. These nanofiber catalysts offer a unique model system that illuminates the fundamental aspects of supported catalysis and accentuates its crucial role in addressing pressing environmental challenges.

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Enhanced CH₄ Selectivity in CO₂ Hydrogenation on Bimetallic Pt–Ni Catalysts with Pt Nanoparticles Modified by Isolated Ni Atoms

Cited by 8 publications

References 49 publications

Dimension Engineering in Noble-Metal-Based Nanocatalysts

Dimension Engineering in Noble-Metal-Based Nanocatalysts

Tuning Interfacial Sites of WO_x/Pt for Enhancing Reverse Water Gas Shift Reaction

CO2 to Value-Added Chemicals: Synthesis and Performance of Mono- and Bimetallic Nickel–Cobalt Nanofiber Catalysts

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Enhanced CH4 Selectivity in CO2 Hydrogenation on Bimetallic Pt–Ni Catalysts with Pt Nanoparticles Modified by Isolated Ni Atoms

Cited by 8 publications

References 49 publications

Dimension Engineering in Noble-Metal-Based Nanocatalysts

Dimension Engineering in Noble-Metal-Based Nanocatalysts

Tuning Interfacial Sites of WOx/Pt for Enhancing Reverse Water Gas Shift Reaction

CO2 to Value-Added Chemicals: Synthesis and Performance of Mono- and Bimetallic Nickel–Cobalt Nanofiber Catalysts

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Product

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Enhanced CH₄ Selectivity in CO₂ Hydrogenation on Bimetallic Pt–Ni Catalysts with Pt Nanoparticles Modified by Isolated Ni Atoms

Tuning Interfacial Sites of WO_x/Pt for Enhancing Reverse Water Gas Shift Reaction