High-Activity Mesoporous Pt/Ru Catalysts for Methanol Oxidation

Franceschini, Esteban A.; Bruno, Mariano M.; Williams, Federico J.; Viva, Federico A.; Corti, Horacio R.

doi:10.1021/am403471c

Cited by 76 publications

(38 citation statements)

References 63 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…As shown in Figure S12c, Supporting Information, in proportion to the scan rate, the forward oxidation peak current densities of mesoporous PdPt spheres and dendritic Pt spheres are increased linearly with the square root of the scan rate, suggesting that the oxidation of methanol at electrodes is a diffusion‐controlled process. The slope of mesoporous PdPt spheres is significantly larger than that of dendritic Pt spheres, revealing that the diffusion efficiency of methanol molecules inside large‐sized pores is higher than that inside small‐sized and dendritic pores 26. As an effective catalyst, the stability is a very important factor for MOR.…”

mentioning

confidence: 99%

Multimetallic Mesoporous Spheres Through Surfactant‐Directed Synthesis

et al. 2015

View full text Add to dashboard Cite

show abstract

mentioning

confidence: 99%

Multimetallic Mesoporous Spheres Through Surfactant‐Directed Synthesis

et al. 2015

View full text Add to dashboard Cite

show abstract

“…Direct methanol fuel cells (DMFCs), a green low-temperature power source, have wide applications in portable electronic devices, residence and automobiles because of their low pollution level, high energy efficiency, convenient storage and transportation, and clean utilization12345678. However, the realization and commercialization of DMFCs have been challanging because of low activity and weak long-term stability of anodic Pt electrocatalysts, as well as the high cost of precious metal Pt.…”

mentioning

confidence: 99%

“…However, the realization and commercialization of DMFCs have been challanging because of low activity and weak long-term stability of anodic Pt electrocatalysts, as well as the high cost of precious metal Pt. Therefore, improving catalytic activity, stability and efficiency of anodic Pt electrocatalysts has currently been a pressing research topic in electrocatalysts development2456910.…”

mentioning

confidence: 99%

A Strategy for Fabricating Porous PdNi@Pt Core-shell Nanostructures and Their Enhanced Activity and Durability for the Methanol Electrooxidation

Liu

Chen

et al. 2015

Sci Rep

View full text Add to dashboard Cite

Three-dimensionally (3D) porous morphology of nanostructures can effectively improve their electrocatalytic activity and durability for various electrochemical reactions owing to big surface area and interconnected structure. Cyanogel, a jelly-like inorganic polymer, can be used to synthesize various three-dimensionally (3D) porous alloy nanomaterials owing to its double-metal property and particular 3D backbone. Here, 3D porous PdNi@Pt core-shell nanostructures (CSNSs) are facilely synthesized by first preparing the Pd-Ni alloy networks (Pd-Ni ANWs) core via cyanogel-reduction method followed by a galvanic displacement reaction to generate the Pt-rich shell. The as-synthesized PdNi@Pt CSNSs exhibit a much improved catalytic activity and durability for the methanol oxidation reaction (MOR) in the acidic media compared to the commercial used Pt black because of their specific structural characteristics. The facile and mild method described herein is highly attractive for the synthisis of 3D porous core-shell nanostructures.

show abstract

“…In addition, the measured activation energies were found to consistently decrease with increasing ruthenium content. 156 Pt-Ru with an atomic% ratio of 97:3 exhibited around 100 mV lower onset potential compared to Pt (445 mV), as well as, a 2.5 times higher mass activity for methanol oxidation (19.3 Ag ¡1 ) than Pt (7.9 Ag ¡1 ). 157 A summary of the CV analyses using various anode nanocatalysts, discussed in this section, has been presented in Table 10.…”

Section: Anode Nanocatalystsmentioning

confidence: 93%

Progress in Developments of Inorganic Nanocatalysts for Application in Direct Methanol Fuel Cells

Das

Dutta

Shul

et al. 2015

Critical Reviews in Solid State and Materials Sciences

View full text Add to dashboard Cite

Significant progress has been made in the last few years toward synthesizing highly dispersible inorganic catalysts for application in the electrodes of direct methanol fuel cells. In addition, research toward achieving an efficient catalyst supporting matrix has also attracted much attention in recent years. Carbon black-(Vulcan XC-72) supported Platinum and PlatinumRuthenium catalysts have for long served as the conventional choice as the cathode and the anode catalyst materials, respectively. Oxygen reduction reaction at the cathode and methanol oxidation reaction at the anode occur simultaneously during the operation of a direct methanol fuel cell. However, inefficiencies in these reactions result in a generation of mixed potential. This, in turn, gives rise to reduced cell voltage, increased oxygen stoichiometric ratio, and generation of additional water that is responsible for water flooding in the cathode chamber. In addition, the lack of long-term stability of Pt-Ru anode catalyst, coupled with the tendency of Ru to cross through the polymer electrolyte membrane and eventually get deposited on the cathode, is also a serious drawback. Another source of potential concern is the fact that the natural resource of Pt and the rare earth metal Ru is very limited, and has been predicted to become exhausted very soon. To overcome these problems, new catalyst systems with high methanol tolerance and higher catalytic activity than Pt need to be developed. In addition, the catalyst-supporting matrix is also witnessing a change from traditionally used carbon powder to transition metal carbides and other highperformance materials. This article surveys the recent literature based on the advancements made in the field of highly dispersible inorganic catalysts for application in direct methanol fuel cells, as well as the progress made in the area of catalyst-supporting matrices.

show abstract

High-Activity Mesoporous Pt/Ru Catalysts for Methanol Oxidation

Cited by 76 publications

References 63 publications

Multimetallic Mesoporous Spheres Through Surfactant‐Directed Synthesis

Multimetallic Mesoporous Spheres Through Surfactant‐Directed Synthesis

A Strategy for Fabricating Porous PdNi@Pt Core-shell Nanostructures and Their Enhanced Activity and Durability for the Methanol Electrooxidation

Progress in Developments of Inorganic Nanocatalysts for Application in Direct Methanol Fuel Cells

Contact Info

Product

Resources

About