Pt-content-controlled synthesis of Pd nanohollows/Pt nanorods core/shell composites with enhanced electrocatalytic activities for the methanol oxidation reaction

Lai, Shiqin; Fu, Chenglin; Chen, Yong-Xiang; Yu, Xiang; Lai, Xuandi; Cui, Ye; Hu, Jianqiang

doi:10.1016/j.jpowsour.2014.10.063

Cited by 41 publications

(23 citation statements)

References 42 publications

(23 reference statements)

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“…As illustrated in Fig. 7a 31 NPs retain a higher methanol oxidation current than the rest of the catalysts tested as well as that of Pt/C catalyst due to the well-developed synergistic effect under this composition in this paper. In detail, on the basis of the previous work [28], Pd is more easily dissolved compared with Pt.…”

Section: Resultssupporting

confidence: 54%

“…Thus, it is expected that the Pd 52 Pt 48 catalyst exhibits the highest activity among all the samples due to the optimized composition in this study. Furthermore, unlike the reported bimetallic catalysts listed in Table S4, the MOR activity of the dendritic Pd 52 Pt 48 nanoparticle is comparable to that of several state-of-the-art electrocatalysts, such as the nanoporous twinned Pd 75 Pt 25 [46] and PtRu nanodendrites [22], but higher than those of many reported electrocatalysts [6][7][8]11,14,24,25,20,31,34].…”

Section: Resultsmentioning

confidence: 61%

“…For the Pd 82 Pt 18 catalyst, the larger peak potential may be due to the inapparent dendritic structure. Interestingly, although the Pd 52 Pt 48 catalyst shows lower onset potential for CO removal than those of the Pd 69 Pt 31 and Pd 36 Pt 64 catalysts, it shows a slightly larger peak potential than those of the latter.…”

Section: Resultsmentioning

confidence: 88%

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One-step synthesis of the PdPt bimetallic nanodendrites with controllable composition for methanol oxidation reaction

Zhang

Chen

et al. 2018

Sci. China Mater.

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This paper demonstrates a one-pot approach to produce highly dispersed dendritic palladium-platinum bimetallic nanoparticles (NPs) with small particle size, tunable composition and high catalytic activity. Herein, the PdPt bimetallic NPs have been obtained using bayberry tannin (BT) as both the reducing agent and surfactant. Additionally, the PdPt bimetallic NPs with different Pd/Pt atomic ratios can be prepared by just varying the amounts of the Pd and Pt precursors. Most importantly, the as-prepared Pd 52 Pt 48 catalyst exhibits the optimal catalytic activities compared with the other compositional PdPt NPs (Pd 82 Pt 18 , Pd 69 Pt 31 , and Pd 36 Pt 64 ) and commercial Pt/C (20 wt.%) catalyst for the methanol oxidation reaction (MOR). Meanwhile, Pd 52 Pt 48 also shows better CO tolerance, which can be attributed to the unique dendritic structure and the synergistic effect between Pd and Pt. With evident advantages of the facile preparation and enhanced catalytic performance, it holds great promise as a high-performance catalyst for electrochemical energy conversion.

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Section: Resultssupporting

confidence: 54%

Section: Resultsmentioning

confidence: 61%

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One-step synthesis of the PdPt bimetallic nanodendrites with controllable composition for methanol oxidation reaction

Zhang

Chen

et al. 2018

Sci. China Mater.

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“…For example, Lai et al [173] prepare a core-shellstructured electrocatalyst by using a three-step process in which Co spheres were first prepared through a reduction reaction. The resulting Co spheres were subsequently used as a hard template for the deposition of Pd atoms by using the galvanic replacement reaction between [PdCl 4 ] 2− and Co to form hollow spheres.…”

Section: Principles and Development Of Wet Chemical Depositionmentioning

confidence: 99%

Core–Shell-Structured Low-Platinum Electrocatalysts for Fuel Cell Applications

Wang

Luo

et al. 2018

Electrochem. Energ. Rev.

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Pt-based catalysts are the most efficient catalysts for low-temperature fuel cells. However, commercialization is impeded by prohibitively high costs and scarcity. One of the most effective strategies to reduce Pt loading is to deposit a monolayer or a few layers of Pt over other metal cores to form core-shell-structured electrocatalysts. In core-shell-structured electrocatalysts, the compositions of the core can be divided into five classes: single-precious metallic cores represented by Pd, Ru, and Au; singlenon-precious metallic cores represented by Cu, Ni, Co, and Fe; alloy cores containing 3d, 4d or 5d metals; and carbide and nitride cores. Of these, researchers have found that carbide and nitride cores can yield tremendous advantages over alloy cores in terms of cost and promotional activities of Pt shells. In addition, desirable shells with reasonable thicknesses and compositions have been recognized to play a dominant role in electrocatalytic performances. And recently, researchers have also found that the catalytic activity of core-shell-structured catalysts is dependent on the binding energy of the adsorbents, which is determined by the d-band center of Pt. The shifting of this d-band center in turn is mainly affected by strain and electronic effects, which can be adjusted by adjusting core compositions and shell thicknesses of catalysts. In the development of these core-shell structures, optimal synthesis methods are of primary concern because they directly determine the practical application potential of the resulting electrocatalysts. And in this article, the principles behind core-shell-structured low-Pt electrocatalysts and the developmental progresses of various synthesis methods along with the traits of each type of core and its effects on Pt shell catalytic activities are discussed. In addition, perspectives on this type of catalyst are discussed and future research directions are proposed.

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“…3c), the corresponding oxidation potential on the CoPt ANPs (0.51 V) and Pt/C (0.61 V) are larger than that on CoPt TONPs (0.47 V). This relatively low trigger oxidation potential means that the MOR is much easier to carry out on CoPt TONPs [43].…”

Section: Magnetic Measurementsmentioning

confidence: 99%

Nanomagnetic CoPt truncated octahedrons: facile synthesis, superior electrocatalytic activity and stability for methanol oxidation

et al. 2016

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Nanomagnetic CoPt truncated octahedral nanoparticles (TONPs) were successfully synthesised through a facile one-pot strategy. These single crystal CoPt TONPs with an average size of about 8 nm exhibit excellent electrocatalytic performance of both activity and stability for methanol oxidation reaction (MOR). The mass and specific activities of CoPt TONPs is 8 and 6 times higher than that of standard commercial Pt/C, respectively. After accelerated durability test (ADT), the loss of electrochemical surface area (ECSA) for CoPt TONPs is only 18.5%, which is significantly less than that of commercial Pt/C (68.2%), indicating that CoPt TONPs possess much better stability than commercial Pt/C in the prolonged operation. The Curie temperature of CoPt TONPs down to 8 nm is as high as 350 K with weak ferromagntism at room temperature (RT), which is greatly valuable for recycling in the eletrocatalytic applications.

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Pt-content-controlled synthesis of Pd nanohollows/Pt nanorods core/shell composites with enhanced electrocatalytic activities for the methanol oxidation reaction

Cited by 41 publications

References 42 publications

One-step synthesis of the PdPt bimetallic nanodendrites with controllable composition for methanol oxidation reaction

One-step synthesis of the PdPt bimetallic nanodendrites with controllable composition for methanol oxidation reaction

Core–Shell-Structured Low-Platinum Electrocatalysts for Fuel Cell Applications

Nanomagnetic CoPt truncated octahedrons: facile synthesis, superior electrocatalytic activity and stability for methanol oxidation

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