Experimental study of characteristics of bimetallic Pt–Fe nano-particle fuel cell electrocatalyst

Yao, Jun; Yao, Yufeng

doi:10.1016/j.renene.2015.03.031

Cited by 17 publications

(19 citation statements)

References 30 publications

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“…[13]. The present measurement data supports that Pt has metallic characteristics, which is agreed well with published results by Koningsberger et al [19,20].…”

Section: En-situ Exafs Measurement For 5 Wt% Pt Loading On Zeolite Casupporting

confidence: 93%

“…15Ptancr4, 5Ptancr4 and 5Ptandr4. Pt particle size of catalyst 15Ptanxcr4 estimated at 0.5 -0.65 nm [13,14] is the smallest, compared to catalysts 15Ptancr4 and 5Ptanxcr4 for which particle sizes were predicted at 0.8 -1.0 nm [13,14]. This finding demonstrates that the presence of H + ions can facilitate to achieve a high Pt distribution by anchoring Pt on zeolite specific active sites.…”

Section: En-situ Exafs Measurement For 5 Wt% Pt Loading On Zeolite Camentioning

confidence: 73%

“…Y zeolite was used as a support for the deposition of 1.5 wt% or 5 wt% Pt loadings, followed by a procedure reported previously [13,14]. The electrodes were prepared by dispersing a known amount of 1.…”

Section: Methodsmentioning

confidence: 99%

“…The electrodes were prepared by dispersing a known amount of 1. Pt particles were characterized by the en-situ extended X-ray adsorption fine structure (EXAFS) using a Synchrotron Radiation Source (SRS) at STFC Daresbury National Laboratory [13]. EXAFS data was collected using a pellet placed in a gas cell, purged with Argon (Ar).…”

Section: Methodsmentioning

confidence: 99%

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En-situ EXAFS investigation of zeolite supported Pt electrocatalyst structure

Yao

2017

Materials Technology

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Experimental investigation was carried out for Pt electrochemical performance and Pt particle size using 1.5 wt% and 5 wt% Pt loading on zeolite electrocatalysts made by Pt(NH 3 ) 4 (NO 3 ) 2 or Pt(NH 3 ) 4 (NO 3 ) 2 /NH 4 NO 3 salt with ion exchanged method and calcined at 350 o C and reduced at 400 o C or direct reduced at 400 o C, respectively. Cycle voltammetry measurement indicated that the hydrogen energy binding level on Pt surfaces is higher for electrocatalyst under direct reduction process than those made by calcination and reduction process. Extended X-ray adsorption fine structure measurement also revealed that Pt size for electrocatalyst made by calcination and reduction method is smaller than those made by direct reduced method. Furthermore, Pt size for electrocatalysts with 1.5wt% Pt loading on zeolite is smaller compared to those with 5 wt% Pt loading electrocatalysts.Aforementioned electrochemical performance of Pt zeolite electrocatalysts has depicted by a hypothesis of hydrogen spillover and surface conductance pathway.

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“…[13]. The present measurement data supports that Pt has metallic characteristics, which is agreed well with published results by Koningsberger et al [19,20].…”

Section: En-situ Exafs Measurement For 5 Wt% Pt Loading On Zeolite Casupporting

confidence: 93%

Section: En-situ Exafs Measurement For 5 Wt% Pt Loading On Zeolite Camentioning

confidence: 73%

Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

See 2 more Smart Citations

En-situ EXAFS investigation of zeolite supported Pt electrocatalyst structure

Yao

2017

Materials Technology

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“…Recently, a lot of efforts have been made to focus on the development of carbon and graphene based Pd-nano electrocatalysts [5] using approaches such as surface modification, composition control [6], alloying [7] and spontaneous methods [8] for hydrogen fuel production in PEFCs. In addition, the 'support promotion' method is another approach employed to improve catalyst nanoparticle distribution for hydrogen fuel cell efficiency enhancement [2].…”

Section: Introductionmentioning

confidence: 99%

Zeolite supported Pd electrocatalyst nanoparticle characterization

Yao

2019

International Journal of Hydrogen Energy

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Highlights:• Detail Pd cluster structure by the ex-situ Extended X-ray Adsorption Fine Structure (EXAFS) method.• Evaluate Pd/Y-zeolite nanoparticle size under calcinations and reduction temperature.• Measure Pd nanoparticle electrochemical activity in electrolyte solution.• Discuss electrochemical reaction behaviour with respect to Pd particle size.• Explore Pd particle location and Pd particle migration and electrochemical behaviour. AbstractA laboratory made 1.5 wt% Palladium (Pd) zeolite electrocatalyst is investigated using the Extended X-ray Adsorption Fine Structure (EXAFS) and Cyclic Voltammetry (CV) techniques to reveal Pd structure and resultant electrochemical performance. It was found that the Abstract ID 23 -International Journal of Hydrogen Energy 2 electrochemical activity of hydrogen charger transfer in the hydride region increased for electrocatalyst with large-size particles made at high temperature of 400 o C, compared to those with small-size particles calcined and reduced at temperature below 360 o C, at which no major discrepancies were observed between catalysts of different sizes. Furthermore, Pd particle location has played an important role to enhance electrocatalyst performance. The Pd atom tends to remain at small cages, i.e. zeolite sodalite cages or hexagonal prisms at calcinations and reduction temperatures below 360 o C. When temperature increases to about 400 o C, the majority Pd atoms tend to migrate from zeolite small cages to supercages and zeolite external structures with enhanced electrochemical performance.

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Recent progress in development of efficient electrocatalyst for methanol oxidation reaction in direct methanol fuel cell

2020

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The human craving for energy is continually mounting and becoming progressively difficult to Gratify. At present, the world's massive energy demands are chiefly encountered by nonrenewable and benign fossil fuels. However, the development of dynamic energy cradles for a gradually thriving world to lessen fossil fuel reserve depletion and environmental concerns are persistent issues for society at present. The discovery of copious nonconventional resources to fill the gap between energy petition and supply is the extreme obligation of the modern era. A new emergent, clean, and robust alternate of fossil fuels are the fuel cells. Among the different types of fuel cells, direct methanol fuel cells are an outstanding option for light-duty vehicles and portable devices. A critical tactic for striving and sustainable energy sources is the production of highly proficient, economical, and green catalysts for energy storage and conversion devices. Up till now a broad range of research work is available to use Pt and modify Ptbased electrocatalysts to augment the CH 3 OH oxidation process. Platinum-based nanocubes, nanorods, nanoflower, hybrids of Pt with metal-oxides such as Fe 2 O 3 , TiO 2 , SnO 2 , MnO, Cu 2 O, ZnO, and with conducting polymers are extensively utilized in both acidic and basic media. Moreover, Pd-based materials, transition metal-based materials as well as MOF and MOF-derived materials are also the point of interest for researchers nowadays. However, the problem associated with their practical applications is that they can be effectively employed in basic media due to comparative less stability in acidic medium. This review article will deliver a broad vision of the current progress of the MOR process concerning noble metals, transition metals, and MOF-based materials.

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Experimental study of characteristics of bimetallic Pt–Fe nano-particle fuel cell electrocatalyst

Cited by 17 publications

References 30 publications

En-situ EXAFS investigation of zeolite supported Pt electrocatalyst structure

En-situ EXAFS investigation of zeolite supported Pt electrocatalyst structure

Zeolite supported Pd electrocatalyst nanoparticle characterization

Recent progress in development of efficient electrocatalyst for methanol oxidation reaction in direct methanol fuel cell

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