The oxygen reduction reaction of ordered porous carbon-supported PtSn catalysts

Shen, Chin Tien; Wang, Kuan Wen; Tseng, Chung Jen; Lee, Kan Rong; Hsueh, Yu Jui

doi:10.1039/c5ra27439g

Cited by 17 publications

(15 citation statements)

References 35 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The detailed discussion about XPS analysis is given in the SI, Figures S6 and S7. In the Pt 60 Mn 1.7 Co 38.3 catalyst, the Pt spectra after deconvolution shows four peaks at 71.20, 72.44, 74.48, and 75.46 eV, of which the peaks at 71.20 and 74.48 eV correspond to the Pt 0 state and those at 72.44 and 75.46 eV correspond to the Pt +2 state . XPS spectra of the Pt 60 Mn 1.7 Co 38.3 catalyst mainly show the presence of metallic Pt 0 (Figure S6a).…”

Section: Resultsmentioning

confidence: 99%

Alloying with Mn Enhances the Activity and Durability of the CoPt Catalyst toward the Methanol Oxidation Reaction

Deshpande

Prasad

2023

ACS Appl. Mater. Interfaces

View full text Add to dashboard Cite

To improve the catalytic performance and durability of Pt catalysts used for the methanol oxidation reaction (MOR) in direct methanol fuel cells (DMFCs), alloying of Pt with other transition metals such as Ru, Co, Ni, and Fe is considered an effective approach. Despite the significant progress made in the preparation of bimetallic alloys and their utilization for MOR, improving the activity and durability of the catalysts to make them commercially viable remains a stiff challenge. In this work, trimetallic Pt100–x (MnCo) x (16 < x < 41) catalysts were successfully synthesized via borohydride reduction followed by hydrothermal treatment at 150 °C. The electrocatalytic performance of the synthesized trimetallic Pt100–x (MnCo) x (16 < x < 41) catalysts toward MOR was studied using cyclic voltammetry and chronoamperometry. The results affirm that all Pt100–x (MnCo) x (16 < x < 41) alloys have superior MOR activity and durability as compared to bimetallic PtCo alloys and commercially available Pt/C (comm. Pt/C) catalysts. Among all the compositions studied, the Pt60Mn1.7Co38.3/C catalyst exhibited superior mass activity (1.3 and 1.9 times higher than those of Pt81Co19/C and comm. Pt/C, respectively) toward MOR. Furthermore, all the newly synthesized Pt100–x (MnCo) x /C (16 < x < 41) catalysts showed better CO tolerance when compared with comm. Pt/C. This improved performance of the Pt100–x (MnCo) x /C (16 < x < 41) catalyst can be attributed to the synergistic effect of Co and Mn on the Pt lattice.

show abstract

Section: Resultsmentioning

confidence: 99%

Alloying with Mn Enhances the Activity and Durability of the CoPt Catalyst toward the Methanol Oxidation Reaction

Deshpande

Prasad

2023

ACS Appl. Mater. Interfaces

View full text Add to dashboard Cite

show abstract

“…In the view of the relative intensities, Ni(OH) 2 was the predominate component in the Ni sites. Regarding the Pt sites, the binding energies of Pt 4f were 74.78 eV and 71.50 eV because of Pt 4f 5/2 and Pt 4f 7/2 , respectively [32,33]. After deconvolution, the spectrum of Pt 4f showed the peaks at 74.20 eV, 71.69 eV, and 70.80 eV corresponding to Pt(0), while 76.34 eV, 75.38 eV, 73.12 eV, and 72.50 eV were associated with PtO or Pt(OH) 2 (Figure 4F) [31,34].…”

Section: Resultsmentioning

confidence: 99%

Highly Efficient Polydopamine-coated Poly(methyl methacrylate) Nanofiber Supported Platinum–Nickel Bimetallic Catalyst for Formaldehyde Oxidation at Room Temperature

Sharma

et al. 2019

Polymers

View full text Add to dashboard Cite

We fabricated one fibrous-membrane type of flexible and lightweight supported catalyst via loading platinum–nickel nanoparticles (PtNi NPs) directly on the polydopamine-coated polymethylmethacrylate electrospun-fibers (PMMA@PDA). The polymer support with the PDA layer provided numerous active sites, leading to well-monodispersed and sized PtNi NPs on the nanofibers. Through the rational design of PtNi NPs, the resultant catalyst system exhibited 90% conversion for decomposing HCHO (10 ppm) at room temperature with only a low dosage (0.02 g), retaining the high activity for 100 hours. This superior catalytic performance stems from the formate oxidation, which was the key intermediate during HCHO decomposition, and was promoted by the existence of a sufficient Pt–OH–Ni interface in the PtNi NPs with an appropriate Pt/Ni ratio of 1:5. Such tailored Pt-based nanoparticles ideally work together with the polymer nanofibers as a support for catalytic reaction. Compared with classical catalysts, our system can handle a comparable efficiency with much lower air resistance and remarkably lower dosage. Furthermore, the membrane-like morphology provides easy handling and minimizes the leaching of catalyst nanoparticles.

show abstract

“…Figure 8 shows the XPS Sn 3d peak deconvolution peaks of the P 20 R 0 S y /C3 (Sn wt% = 10, 15, 20, 30) catalysts. The Sn 3d spectra clearly exhibit intense doublets attributable to 3d 3/2 (494.7 eV) and 3d 5/2 (486.4 eV), indicating the presence of Sn 4+ in SnO 2 [32][33][34]. It is clear that the metal state of tin (Sn 0 ) only appears in P 20 R 0 S 10 /C3.…”

Section: Effect Of Sn Ratio On Catalyst Chemical Statesmentioning

confidence: 97%

Pt–RuO u –SnO v /CMK-3 composite electrocatalysts for the methanol oxidation reaction

Saravanan¹,

Chang²,

Chung³

et al. 2020

Comptes Rendus. Chimie

View full text Add to dashboard Cite

A composite of highly dispersed Pt-RuO u-SnO v nanoparticles (NPs) on a mesoporous carbon CMK-3 framework was synthesized. The resulting composites of Pt, RuO u , SnO v , and CMK-3 were designated P w R x S y /C3, and their microstructures and compositions were systematically characterized using a variety of techniques. The Pt-based NPs have average particle sizes of 2-8 nm and were well dispersed in the pore channels of the CMK-3 host. The methanol oxidation reaction (MOR) activity of the catalysts was investigated as a function of the Sn mass fraction. The electrochemical activity for the MOR improved with increasing Sn content in the Pt-Ru-Sn/CMK-3 composite. In short, MOR activity, CO tolerance, long-term stability, cyclic durability, and cost performance of our proposed composition were significantly improved, which renders efficient routes to developing catalysts for direct methanol fuel cells.

show abstract

The oxygen reduction reaction of ordered porous carbon-supported PtSn catalysts

Abstract: Before and after ADT, the stabilization stems from electronic modification effect of synergistic Sn and OPC addition.

Cited by 17 publications

References 35 publications

Alloying with Mn Enhances the Activity and Durability of the CoPt Catalyst toward the Methanol Oxidation Reaction

Alloying with Mn Enhances the Activity and Durability of the CoPt Catalyst toward the Methanol Oxidation Reaction

Highly Efficient Polydopamine-coated Poly(methyl methacrylate) Nanofiber Supported Platinum–Nickel Bimetallic Catalyst for Formaldehyde Oxidation at Room Temperature

Pt–RuO u –SnO v /CMK-3 composite electrocatalysts for the methanol oxidation reaction

Contact Info

Product

Resources

About