A novel structural design of hybrid nanotube with CNTs and CeO2 supported Pt nanoparticles with improved performance for methanol electro-oxidation

Long, Li; Qian, Yu; Yang, Jingjing; Tan, Xiaoyao; Zhao, Donglin; Jin, Yongxiang; Wang, Haitao; Qu, Wei-Li; Chu, Yuanyuan

doi:10.1016/j.ijhydene.2016.04.069

Cited by 29 publications

(13 citation statements)

References 34 publications

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“…All the electrochemical results are presented as normalized current density (j mg Pt −1 ). 27 Furthermore, the diffraction peaks of Pt in Pt 1 (CeO 2 ) 0.5 /MWCNTs-D are much wider than that of Pt/MWCNTs-W and Pt/MWCNTs-D, and the average crystallite sizes for the obtained catalysts were calculated using the Debye−Scherrer's equation. 39 The average crystallite sizes for Pt/MWCNTs-W, Pt/MWCNTs-D, and Pt 1 (CeO 2 ) 0.5 /MWCNTs-D were calculated to be 7.1, 5.7, and 4.3 nm, respectively.…”

Section: ■ Experimental Sectionmentioning

confidence: 99%

“…Similarly, Feng et al indicated that the morphologies of nanocrystalline CeO 2 had a significant effect on promoting the performance of the Pt catalyst toward MOR . Furthermore, the enhanced interaction between the CeO 2 substrate and Pt nanoparticles in promoting methanol oxidation has been well-demonstrated by Li et al Moreover, it has been indicated that CeO 2 can be used to effectively modify several carbon materials (reduced graphene oxide, graphene oxide, carbon nanotubes, etc.) for loading Pt nanoparticles .…”

Section: Introductionmentioning

confidence: 95%

“…28 However, it has been found that these chemical reduction methods are based on the use of aqueous solutions 28 or toxic organic solvents. 27 Thus, it will either accelerate the difficulties in adjusting the shape and dispersion of the obtained nanomaterials synthesized in water 29,30 or dispense more harmful/poisonous chemicals to the environment during the synthesis of nanomaterials in organic solvents. 31 Hence, an urge to develop eco-friendly methods for the fabrication of Pt-based catalysts exists.…”

Section: ■ Introductionmentioning

confidence: 99%

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Pt₁(CeO₂)_0.5 Nanoparticles Supported on Multiwalled Carbon Nanotubes for Methanol Electro-oxidation

Yang

Devasenathipathy

et al. 2021

ACS Appl. Nano Mater.

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Deep eutectic solvents (DESs), regarded as an analogue of ionic liquids, consist of Brønsted or Lewis acids mixed with certain bases. These solvents are ideal around room temperature and possess a considerably low melting point relative to the involved single components. The important features of DESs including conductivity, high viscosity, biodegradability, and surface tension make them promising green sustainable media for the synthesis of various nanomaterials, which have been used in the field of energy and environment in the recent 5 years. Herein, synthesis of ultrafine Pt 1 (CeO 2 ) 0.5 -decorated multiwalled carbon nanotube nanoelectrocatalysts (Pt 1 (CeO 2 ) 0.5 /MWCNTs-D) was performed using the DESs. We found that DESs play a vital role in the synthesis of uniform dispersion and ultrafine nanoparticles to strengthen the interaction of CeO 2 and Pt, as well as the controllable synthesis of CeO 2 . Furthermore, the addition of CeO 2 not only slightly promotes Pt(II) content but also can obviously enhance the electrochemical performance of Pt 1 (CeO 2 ) 0.5 /MWCNTs-D. The catalyst exhibits better CO antipoisoning capability and greater catalytic performance (onset potential: 0.44 V and peak current: 641.6 mA mg Pt −1) toward methanol oxidation than that of Pt/MWCNTs-W synthesized in water (0.58 V and 229.9 mA mg Pt −1 ) and Pt/MWCNTs-D synthesized in DESs (0.55 V and 459.2 mA mg Pt −1). The main features of Pt 1 (CeO 2 ) 0.5 /MWCNTs-D such as higher peak current, lower oxidation potential, CO antipoisoning capability, and larger electrochemical active surface area toward oxidation of methanol can benefit the construction of highly electroactive Pt-based nanomaterials for the direct methanol fuel cell applications.

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Section: ■ Experimental Sectionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 95%

Section: ■ Introductionmentioning

confidence: 99%

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Pt₁(CeO₂)_0.5 Nanoparticles Supported on Multiwalled Carbon Nanotubes for Methanol Electro-oxidation

Yang

Devasenathipathy

et al. 2021

ACS Appl. Nano Mater.

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“…21 found on the Pt/Pd−CeO 2 catalyst system fabricated by different approaches. 22 Engineering the interface interaction between Pt and CeO 2 by the formation of rich oxygen vacancies and rough surfaces on the CeO 2 nanorod by plasma was reported as an effective way to increase the activity for electrooxidation of methanol. 23 Support-shape-dependent activity of Pt catalysts was found in methanol electrooxidation by loading Pt nanoparticles on CeO 2 with different shapes in the alkaline electrolyte.…”

Section: Introductionmentioning

confidence: 99%

“…A five-fold enhancement in anion exchange membrane fuel cells was reported using Pd/C–CeO 2 catalysts compared with Pd/C catalysts . Improved performance of electrooxidation of methanol and ethanol was found on the Pt/Pd–CeO 2 catalyst system fabricated by different approaches . Engineering the interface interaction between Pt and CeO 2 by the formation of rich oxygen vacancies and rough surfaces on the CeO 2 nanorod by plasma was reported as an effective way to increase the activity for electrooxidation of methanol .…”

Section: Introductionmentioning

confidence: 99%

Interfacial Pd–O–Ce Linkage Enhancement Boosting Formic Acid Electrooxidation

Zhou

Liu

Zong

et al. 2020

ACS Appl. Mater. Interfaces

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Metal−support interaction enhancement is critical in the fuel cell catalyst design and fabrication. Herein, taking the Pd@CeO 2 system as an example, we revealed the substrate morphology coupling effect and the thermal annealinginduced Pd−O−Ce linkage enhancement in the improved catalytic capability for formic acid electrooxidation. Three well-defined CeO 2 nanocrystals were employed to support Pd nanoparticles, and the best catalytic performance for formic acid oxidation and anti-CO poisoning ability was found on CeO 2 plates because of the high oxygen vacancy, Ce 3+ , and more Pd−O−Ce linkages resulting from the more edge/corner defects. This interaction of Pd−O−Ce linkages could be largely enhanced by thermal annealing in the N 2 atmosphere, as confirmed by a series of crystal structures, surface chemical state, and Raman analysis because the oxygen vacancies and lattice oxygen resulting from the oxygen atoms leaching from the CeO 2 lattice would trap the mobile Pd nanocrystals by forming strengthened Pd−O−Ce linkages. Due to the high oxygen vacancy and strong Pd−O−Ce linkages, largely increased catalytic activity and stability, catalytic kinetics, and rapid charge transfer were found for all the thermal annealed Pd@CeO 2 catalysts. A nearly 1.93-fold enhancement in the mass activity was achieved on the Pd@CeO 2 -plate catalysts demonstrating the significance of Pd−O−Ce linkage enhancement. The formation mechanism of Pd−O−Ce linkage was also probed, and a valid Pd−O−Ce linkage can only be formed in the inert atmosphere because of the reaction between metallic Pd and CeO 2 . This finding sheds some light on the more efficient catalyst interface construction and understanding for the fuel cell catalysis via metal−support interaction enhancement.

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New Perspectives of Pt−CeO₂ System: Stabilization on MWCNTs for Boosting Activity and Water‐Resistance in CO Oxidation at Ambient Temperatures

Slavinskaya,

Stonkus,

Kibis

et al. 2024

ChemCatChem

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The present study elucidates new perspectives regarding the Pt–CeO2 system for CO oxidation. The successful deposition of highly dispersed Pt–CeO2 species onto the surface of multiwalled carbon nanotubes (MWCNTs) led to the formation of abnormally active and water‐resistant catalysts. The catalysts were investigated by structural (XRD, TEM), spectral (XPS), and kinetic (TPR–CO+O2, TPR–CO, TPR–H2) methods. The application of TPR–CO+O2 revealed the remarkably high activity of all Pt–CeO2/MWCNTs catalysts at temperatures below 0 °C. The study of the catalysts at ambient temperature demonstrated high CO conversion in the presence of water vapor at a concentration of 100 ppm CO. The experimental findings suggest that active sites, comprising platinum structures stabilized directly on the surface of MWCNTs, play a pivotal role in the oxidation of CO under humid conditions. A dual–site approach was employed to develop a kinetic model that effectively describes the experimental data. This model provides valuable insights into the mechanism of wet CO oxidation.

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A novel structural design of hybrid nanotube with CNTs and CeO2 supported Pt nanoparticles with improved performance for methanol electro-oxidation

Cited by 29 publications

References 34 publications

Pt₁(CeO₂)_0.5 Nanoparticles Supported on Multiwalled Carbon Nanotubes for Methanol Electro-oxidation

Pt₁(CeO₂)_0.5 Nanoparticles Supported on Multiwalled Carbon Nanotubes for Methanol Electro-oxidation

Interfacial Pd–O–Ce Linkage Enhancement Boosting Formic Acid Electrooxidation

New Perspectives of Pt−CeO₂ System: Stabilization on MWCNTs for Boosting Activity and Water‐Resistance in CO Oxidation at Ambient Temperatures

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A novel structural design of hybrid nanotube with CNTs and CeO2 supported Pt nanoparticles with improved performance for methanol electro-oxidation

Cited by 29 publications

References 34 publications

Pt1(CeO2)0.5 Nanoparticles Supported on Multiwalled Carbon Nanotubes for Methanol Electro-oxidation

Pt1(CeO2)0.5 Nanoparticles Supported on Multiwalled Carbon Nanotubes for Methanol Electro-oxidation

Interfacial Pd–O–Ce Linkage Enhancement Boosting Formic Acid Electrooxidation

New Perspectives of Pt−CeO2 System: Stabilization on MWCNTs for Boosting Activity and Water‐Resistance in CO Oxidation at Ambient Temperatures

Contact Info

Product

Resources

About

Pt₁(CeO₂)_0.5 Nanoparticles Supported on Multiwalled Carbon Nanotubes for Methanol Electro-oxidation

Pt₁(CeO₂)_0.5 Nanoparticles Supported on Multiwalled Carbon Nanotubes for Methanol Electro-oxidation

New Perspectives of Pt−CeO₂ System: Stabilization on MWCNTs for Boosting Activity and Water‐Resistance in CO Oxidation at Ambient Temperatures