Support Shape Effect on the Catalytic Performance of Pt/CeO2 Nanostructures for Methanol Electrooxidation

Zhang, Dafeng; Zhang, Cuisong; Chen, Yumei; Wang, Qiufen; Bian, Linyan; Jiang, Miao

doi:10.1016/j.electacta.2014.06.140

Cited by 31 publications

(10 citation statements)

References 28 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…[33] This has been pursued, for example, by synthesizing shape-controlled carbon surfaces such as sheets, tubes, and horns, [34] by doping carbon with heteroatoms, [35][36][37] and by the addition of metal oxides in the carbon supports, including TiO 2 , CeO 2 , WO 3 . [38][39][40][41] Interestingly, metal oxides can also act as sources of oxygen, which is involved in promoting the carbon monoxide removal from the Pt NPs surface during the electrooxidation reactions as well as promoting changes in the metal-support interactions. Inspired by these guidelines, we report on the effect of the control over the shape of the metal oxide added to the carbon support in Pt-based electrocatalytic materials.…”

Section: Introductionmentioning

confidence: 99%

Improving the Electrocatalytic Activities and CO Tolerance of Pt NPs by Incorporating TiO₂ Nanocubes onto Carbon Supports

et al. 2021

View full text Add to dashboard Cite

Designing efficient anode CO-tolerant electrocatalysts is critical in low-temperature fuel cell catalysts fueled either by H 2 /CO or alcohol. We demonstrate that the incorporation of TiO 2 nanocubes (TiO 2 NCs) on Carbon Vulcan supports, followed by the synthesis of Pt NPs at their surface (Pt/TiO 2 NCs-C material), led to improvements in performance towards the electrooxidation of carbon monoxide, ethanol, methanol, ethylene glycol, and glycerol in acidic media relative to the commercial Pt/C and Pt/ TiO 2 -C counterparts employing commercial TiO 2 . The nanocubes enabled changes in the electronic properties of Pt NPs while contributing to the bifunctional mechanism as compared to Pt/ C and Pt/TiO 2 -C with commercial TiO 2 . Fuel cell experiments fed with H 2 /CO steam showed that Pt/TiO 2 NCs-C employing nanocubes was resistant to CO-poisoning, yielding superior performance in operational conditions. The results reported herein have important implications for developing electrocatalysts with superior performances in PEMFCs.

show abstract

Section: Introductionmentioning

confidence: 99%

Improving the Electrocatalytic Activities and CO Tolerance of Pt NPs by Incorporating TiO₂ Nanocubes onto Carbon Supports

et al. 2021

View full text Add to dashboard Cite

show abstract

“…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. 24,25 Formic acid, a very promising carbon-neutral fuel in the fuel cells, comes into our interest as it can be generated by direct reduction of CO 2 or obtained from the byproduct of levulinic acid production. 26 Different from the alcohol fuels like methanol and ethanol, formic acid electrooxidation follows a parallel path mechanism, known as the direct (via CO 2 path) and indirect (via CO path ) pathway.…”

Section: Introductionmentioning

confidence: 99%

“…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 . 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%

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

Zhou

Liu

Zong

et al. 2020

ACS Appl. Mater. Interfaces

View full text Add to dashboard Cite

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.

show abstract

“…Cerium oxide (CeO 2 ), due to its unique features (e.g., high oxygen storage capacity (OSC), rich oxygen vacancies, strong interaction with active metals, and ease of change between Ce 3+ and Ce 4+ ), has been regarded and extensively used as a versatile and excellent support for transition metal [4,5] and noble metal [6,7] catalysts in many catalytic processes [8]. Among these CeO 2 support catalysts, Figure 1 shows the XRD patterns of the CeO 2 supports and the corresponding Cu/CeO 2 catalysts.…”

Section: Introductionmentioning

confidence: 99%

Morphology-Dependent Properties of Cu/CeO2 Catalysts for the Water-Gas Shift Reaction

Ren

Peng

et al. 2017

Catalysts

View full text Add to dashboard Cite

CeO 2 nanooctahedrons, nanorods, and nanocubes were prepared by the hydrothermal method and were then used as supports of Cu-based catalysts for the water-gas shift (WGS) reaction. The chemical and physical properties of these catalysts were characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM), N 2 adsorption/desorption, UV-Vis spectroscopy, X-ray photoelectron spectroscopy (XPS), hydrogen temperature-programmed reduction (H 2 -TPR) and in situ diffuse reflectance infra-red fourier transform spectroscopy (DRIFTS) techniques. Characterization results indicate that the morphology of the CeO 2 supports, originating from the selective exposure of different crystal planes, has a distinct impact on the dispersion of Cu and the catalytic properties. The nanooctahedron CeO 2 catalyst (Cu-CeO 2 -O) showed the best dispersion of Cu, the largest amount of moderate copper oxide, and the strongest Cu-support interaction. Consequently, the Cu-CeO 2 -O catalyst exhibited the highest CO conversion at the temperature range of 150-250 • C when compared with the nanocube and nanorod Cu-CeO 2 catalysts. The optimized Cu content of the Cu-CeO 2 -O catalysts is 10 wt % and the CO conversion reaches 91.3% at 300 • C. A distinctive profile assigned to the evolution of different types of carbonate species was observed in the 1000-1800 cm −1 region of the in situ DRIFTS spectra and a particular type of carbonate species was identified as a potential key reaction intermediate at low temperature.

show abstract

Support Shape Effect on the Catalytic Performance of Pt/CeO2 Nanostructures for Methanol Electrooxidation

Cited by 31 publications

References 28 publications

Improving the Electrocatalytic Activities and CO Tolerance of Pt NPs by Incorporating TiO₂ Nanocubes onto Carbon Supports

Improving the Electrocatalytic Activities and CO Tolerance of Pt NPs by Incorporating TiO₂ Nanocubes onto Carbon Supports

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

Morphology-Dependent Properties of Cu/CeO2 Catalysts for the Water-Gas Shift Reaction

Contact Info

Product

Resources

About

Support Shape Effect on the Catalytic Performance of Pt/CeO2 Nanostructures for Methanol Electrooxidation

Cited by 31 publications

References 28 publications

Improving the Electrocatalytic Activities and CO Tolerance of Pt NPs by Incorporating TiO2 Nanocubes onto Carbon Supports

Improving the Electrocatalytic Activities and CO Tolerance of Pt NPs by Incorporating TiO2 Nanocubes onto Carbon Supports

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

Morphology-Dependent Properties of Cu/CeO2 Catalysts for the Water-Gas Shift Reaction

Contact Info

Product

Resources

About

Improving the Electrocatalytic Activities and CO Tolerance of Pt NPs by Incorporating TiO₂ Nanocubes onto Carbon Supports

Improving the Electrocatalytic Activities and CO Tolerance of Pt NPs by Incorporating TiO₂ Nanocubes onto Carbon Supports