Synthesis of Pt3Ni-based functionalized MWCNTs to enhance electrocatalysis for PEM fuel cells

Qiao, Liang; Liao, Mingjia; Chen, Siguo; Wei, Zidong; Zhang, Shengtao

doi:10.1007/s10008-014-2389-z

Cited by 4 publications

(5 citation statements)

References 43 publications

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“…The ECSA (eq 2) is calculated by dividing the H-ad/desorption area and 210 μC cm −2 as the charge needed for adsorption of a monolayer of hydrogen on the Pt surface. 46 As seen in Table 1, the ECSA of PtCo/n-NCS is the largest and followed by PtCo/C, PtCo/r-NCS, and Pt/C. To understand more deeply, electron-transfer number and hydrogen peroxide produced during the LSV measurement were determined.…”

Section: Resultsmentioning

confidence: 99%

“…The electrochemical surface area (ECSA) of the Pt-based catalyst is measured by the H-ad/desorption area between 0.05 and 0.4 V (vs RHE) of the CV curve in N 2 -saturated 0.1 M HClO 4 (Figure S1). The ECSA (eq ) is calculated by dividing the H-ad/desorption area and 210 μC cm –2 as the charge needed for adsorption of a monolayer of hydrogen on the Pt surface . As seen in Table , the ECSA of PtCo/n-NCS is the largest and followed by PtCo/C, PtCo/r-NCS, and Pt/C.…”

Section: Resultsmentioning

confidence: 99%

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High Activity of Platinum-Cobalt Supported by Natto-like N-Doped Carbon Sphere as Durable Catalyst for Oxygen Reduction Reaction

et al. 2021

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This study demonstrates a platinum and cobalt alloy (PtCo) supported by natto-like N-doped carbon spheres (n-NCS), denoted as PtCo/n-NCS, showing excellent catalytic activity and high durability for the oxygen reduction reaction (ORR). PtCo/n-NCS demonstrate the electron-transfer number of 3.98 and only the decay of 53 mV on half-wave potential after 30 000 cycles. PtCo/n-NCS contribute a high Pt mass activity of 823.01 mA mg Pt −1 at 0.80 V, compared to Pt/C and PtCo/C with 105.46 and 235.20 mA mg Pt −1 , respectively. n-NCS provide a large surface area to increase NCS for the utilization of PtCo catalysts and a large amount of the graphitic-N structures to enhance the four-electron transfer. Therefore, PtCo/n-NCS have a superior ORR activity, making them the promising catalysts for the ORR.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

High Activity of Platinum-Cobalt Supported by Natto-like N-Doped Carbon Sphere as Durable Catalyst for Oxygen Reduction Reaction

et al. 2021

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“…Platinum nanoparticle (or platinum alloys [7][8][9][10]) supported on carbon (Pt/C) is currently accepted as the state-of-the-art commercial electrocatalyst used in PEMFCs, because of its high activity and high specific surface area [11,12]. Nevertheless, the electrocatalytic activity for the oxygen reduction reaction (ORR) on Pt-based electrocatalysts is insufficient to obtain the required efficiency.…”

Section: Introductionmentioning

confidence: 99%

Electrochemical and physicochemical properties of titanium Oxy-nitride electrocatalyst prepared by sol-gel methods for the oxygen reduction reaction purposes

Seifitokaldani

Oishi

Perrier

et al. 2015

J Solid State Electrochem

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In the present article, titanium oxy-nitride (TiON), as a potential electrocatalyst for the oxygen reduction reaction (ORR), is fabricated by four different sol-gel methods. Physicochemical properties (structure, chemical composition, BET surface area, surface morphology, chemical stability, and electrochemical stability) are determined. The ORR in acid medium on these TiON electrocatalysts is evaluated and compared to the ORR on commercial Pt/C. This evaluation is based on the onset potential, charge density, Tafel slope, exchange current density, and mass activity. Chemical and electrochemical stability of TiON electrocatalysts are compared to those of platinum electrocatalyst. It is shown that the preparation method affects the electrocatalytic activity and stability. The stability of the TiON electrocatalysts is correlated to their chemical composition and BET surface area. In addition, the effect of the heat treatment condition on the chemical composition, surface area, and performance of the electrocatalysts are investigated. The best TiON electrocatalyst with a high content of nitrogen exhibited the onset potential of 0.75 V vs. NHE, which is quite promising for a non-noble electrocatalyst for the ORR in acid medium.

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“…The electrocatalyst with the best catalytic activity exhibited a higher specific activity and a slightly lower mass activity for the ORR in acid medium. It is important to mention some of the precedents that serve as a starting point for this PtNi system and the carbon supports [24][25][26][27][28][29][30][31]. In this regard, Asset et al studied different properties that influence the catalytic activity of the catalysts due to the support material.…”

Section: Introductionmentioning

confidence: 99%

“…Although there are some studies on the effect of the structure of different carbon supports on the catalytic activity of the PtNi [24][25][26][27][28][29][30][31] alloy, as far as the authors' knowledge, there are no studies comparing the effect of materials, such as pristine carbon nanofibers, pristine carbon nanotubes, and commercial carbon black.…”

Section: Introductionmentioning

confidence: 99%

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

et al. 2022

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To evaluate supports’ effects on catalytic activity toward the oxygen reduction reaction (ORR), a simple and controlled chemical synthesis, involving the hot injection of metal precursors, was developed to produce bimetallic PtNi nanoparticles (75 wt.% Pt and 25 wt.% Ni), supported on carbon nanotubes (CNTs) and carbon nanofibers (CNFs). The synthesized electrocatalyst was characterized using X-ray diffraction (XRD), energy dispersive X-ray spectroscopy (EDS), and scanning transmission electron microscopy (STEM). To determine the catalytic activity, an electrochemical evaluation of the synthesized catalysts in an acidic medium was performed using cyclic voltammetry (CV), CO stripping, and rotating disk electrode (RDE) tests. The presence of Pt and Ni in the nanoparticles was confirmed by EDS and XRD. Based on the STEM micrographs, the average particle size was 30 nm. Compared to the commercial Pt/C catalyst, the PtNi/CNT catalyst exhibited higher specific activity and slightly lower mass activity toward ORR in a 0.1 M HClO4 electrolyte solution.

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Synthesis of Pt3Ni-based functionalized MWCNTs to enhance electrocatalysis for PEM fuel cells

Cited by 4 publications

References 43 publications

High Activity of Platinum-Cobalt Supported by Natto-like N-Doped Carbon Sphere as Durable Catalyst for Oxygen Reduction Reaction

High Activity of Platinum-Cobalt Supported by Natto-like N-Doped Carbon Sphere as Durable Catalyst for Oxygen Reduction Reaction

Electrochemical and physicochemical properties of titanium Oxy-nitride electrocatalyst prepared by sol-gel methods for the oxygen reduction reaction purposes

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

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