Effect of Different Carbon Supports on the Activity of PtNi Bimetallic Catalysts toward the Oxygen Reduction

Ortiz-Herrera, J.C.; Tellez-Cruz, M.M.; Solorza‐Feria, O.; Medina, Dora I.

doi:10.3390/catal12050477

Cited by 10 publications

(4 citation statements)

References 52 publications

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“…The corrosion of the carbon supports becomes especially obvious when the cathode potential is as high as 1.5 V (vs. NHE) during the event of start/stop or H 2 starvation. Therefore, the porous structure of the carbon supports will collapse, weakening the interaction with the Pt particles and accelerating the shedding and degradation of particle catalysts [81,82]. Compared with pure Pt, binary or ternary Pt-based alloy catalysts tend to display an enhanced electrocatalytic performance.…”

Section: Limitation Of Traditional Pt-based Orr Catalystsmentioning

confidence: 99%

Ultradurable Pt-Based Catalysts for Oxygen Reduction Electrocatalysis

Li,

Zhou,

Zhao

et al. 2024

Catalysts

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An oxygen reduction reaction (ORR) is the key half reaction of proton exchange membrane fuel cells (PEMFCs), and is highly dependent on Pt-based nanocrystals as core electrocatalysts. Despite the exceptional ORR activity from adjusting the electronic structures of surface or near-surface atoms, several serious issues, including the corrosion of carbon supports, the preferential leaching of active metal elements, the instability of surface low-coordinated atoms and the sintering/agglomeration of nanocrystals, still exist, challenging the ORR durability of developed Pt-based ORR catalysts. From the point of view of the catalyst structure design, in this review, we summarized the state-of-the-art structural regulation strategies for improving the ORR durability of Pt-based catalysts. The current limitation of Pt-based binary catalysts for ORR electrocatalysis is firstly discussed, and the detailed strategies are further classified into the optimization of supports, metal-doped alloys, core/shell structures, intermetallics and high-entropy alloys, etc. The structure–performance relationship is detailedly explained, especially emphasizing the elimination of the above restrictions. Finally, the existing challenges and future research direction are further presented, aiming at practicing the PEMFC devices of the ultradurable Pt-based catalysts.

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Section: Limitation Of Traditional Pt-based Orr Catalystsmentioning

confidence: 99%

Ultradurable Pt-Based Catalysts for Oxygen Reduction Electrocatalysis

Li,

Zhou,

Zhao

et al. 2024

Catalysts

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“…Its value is twice as high as the mass activity of the PtNi/C and PtCo/C samples and 3 times higher than the mass activity of Pt/C (Table S1, Figure 6a). It is noteworthy that nickel [21][22][23][24][25] and cobalt [21,26,27,29,30] are most commonly used in the literature as the most promising alloying components when comparing the ORR activities of different PtM/C catalysts, with only a few publications mentioning copper [61,62]. Therefore, the question of choosing an optimal alloying component for the most active catalyst in the ORR is still relevant, presumably depending on both the nature of the alloying component and the microstructure of the catalyst used.…”

Section: The Electrochemical Behavior Of the Catalystsmentioning

confidence: 99%

“…The search for optimal compositions and microstructures is still ongoing, which in turn causes the development of different methods to obtain PtM/C catalysts [1,8,19,20]. When obtaining high-performance ORR catalysts, Ni [21][22][23][24][25], Co [26][27][28][29][30], and Cu [31][32][33][34][35][36][37] are the most commonly used alloying components for platinum among other metals [38,39]. The use of ruthenium as the alloying component for platinum is connected to another type of influence that is different from that for nickel, cobalt, and copper.…”

Section: Introductionmentioning

confidence: 99%

The PtM/C (M = Co, Ni, Cu, Ru) Electrocatalysts: Their Synthesis, Structure, Activity in the Oxygen Reduction and Methanol Oxidation Reactions, and Durability

et al. 2023

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PtM/C (M = Co, Ni, Cu, Ru) catalysts were prepared by wet-synthesis methods. The composition and structure of the synthesized materials were estimated by TXRF, XRD, TEM, HAADF-STEM, EDX, and TGA/DSC methods. According to the CV and LSV methods, the PtCu/C material is characterized by the highest activity in the ORR compared to the other materials studied. The PtRu/C catalysts also exhibit the highest activity in the MOR. Studying the durability of the obtained bimetallic catalysts using accelerated stress testing has allowed for the detection of the most promising materials, whose characteristics would be superior to those of the commercial Pt/C analog. This study has shown that wet-synthesis methods allow obtaining bimetallic catalysts characterized by higher activity and enhanced durability. This research also indicates that special attention should be given to the possibility of scaling these synthesis techniques, which makes the aforementioned catalysts promising for commercial applications.

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“…Among these technologies, the polymer exchange membrane fuel cell (PEMFC) is one of the most promising technologies available. The PEMFC has significant advantages such as a high energy density and low temperature [ 2 , 3 , 4 , 5 , 6 , 7 , 8 ], which makes it an ideal candidate for portable, stationary, residential, and transport applications.…”

Section: Introductionmentioning

confidence: 99%

One-Pot Graphene Supported Pt3Cu Nanoparticles—From Theory towards an Effective Molecular Oxygen Reduction Reaction Catalyst

et al. 2023

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In this work, recent research progresses in the formation of Pt3Cu nanoparticles onto the surface of graphene are described, and the obtained results are contrasted with previously published theoretical studies. To form these nanoparticles, tetrabutylammonium hexachloroplatinate, and copper acetylacetonate are used as platinum and copper precursors, respectively. Oleylamine is used as a reductor and a solvent. The obtained catalyst is characterized via X-ray diffraction (XRD), transmission electron microscopy (TEM), scanning electron microscopy (SEM), and energy dispersive spectroscopy X-ray (EDS). To assess the catalytic activity, the graphene-supported Pt3Cu material is tested with cyclic voltammetry, “CO stripping”, and oxygen reduction reaction potentiodynamic curves to find the nature and the intrinsic electrochemical activity of the material. It can be observed that the tetrabutylammonium cation plays a critical role in anchoring and supporting nanoparticles over graphene, from which a broad discussion about the true nature of the anchoring mechanism was derived. The growth mechanism of the nanoparticles on the surface of graphene was observed, supporting the conducted theoretical models. With this study, a reliable, versatile, and efficient synthesis of nanocatalysts is presented, demonstrating the potentiality of Pt3Cu/graphene as an effective cathode catalyst. This study demonstrates the importance of reliable ab inito theoretical results as a useful source of information for the synthesis of the Pt3Cu alloy system.

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Effect of Different Carbon Supports on the Activity of PtNi Bimetallic Catalysts toward the Oxygen Reduction

Cited by 10 publications

References 52 publications

Ultradurable Pt-Based Catalysts for Oxygen Reduction Electrocatalysis

Ultradurable Pt-Based Catalysts for Oxygen Reduction Electrocatalysis

The PtM/C (M = Co, Ni, Cu, Ru) Electrocatalysts: Their Synthesis, Structure, Activity in the Oxygen Reduction and Methanol Oxidation Reactions, and Durability

One-Pot Graphene Supported Pt3Cu Nanoparticles—From Theory towards an Effective Molecular Oxygen Reduction Reaction Catalyst

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