Nanoporous PdNi alloys as highly active and methanol-tolerant electrocatalysts towards oxygen reduction reaction

Xu, Caixia; Liu, Yunqing; Qin, Hao; Duan, Huimei

doi:10.1039/c3ta12765f

Cited by 102 publications

(51 citation statements)

References 41 publications

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“…In contrast, facile dealloying has shown its advantage in preparing nanoporous metals/alloys. Thus, materials with unique nanoporous structure possess intriguing physical and chemical properties to generate promising potentials for various important applications such as sensors [23], mechanical actuators [24] and catalysis [25,26].…”

Section: Introductionmentioning

confidence: 99%

Synthesis and Electrocatalytic Performance of Multi-Component Nanoporous PtRuCuW Alloy for Direct Methanol Fuel Cells

Chen

Wang

et al. 2015

Catalysts

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Abstract:We have prepared a multi-component nanoporous PtRuCuW (np-PtRuCuW) electrocatalyst via a combined chemical dealloying and mechanical alloying process. The X-ray diffraction (XRD), transmission electron microscopy (TEM) and electrochemical measurements have been applied to characterize the microstructure and electrocatalytic activities of the np-PtRuCuW. The np-PtRuCuW catalyst has a unique three-dimensional bi-continuous ligament structure and the length scale is 2.0 ± 0.3 nm. The np-PtRuCuW catalyst shows a relatively high level of activity normalized to mass (467.1 mA mgPt) and electrochemically active surface area (1.8 mA cm −2 ) compared to the state-of-the-art commercial PtC and PtRu catalyst at anode. Although the CO stripping peak of np-PtRuCuW 0.47 V (vs. saturated calomel electrode, SCE) is more positive than PtRu, there is a 200 mV negative shift compared to PtC (0.67 V vs. SCE). In addition, the half-wave potential and specific activity towards oxygen reduction of np-PtRuCuW are 0.877 V (vs. reversible hydrogen electrode, RHE) and 0.26 mA cm −2 , indicating a great enhancement towards oxygen reduction than the commercial PtC. OPEN ACCESSCatalysts 2015, 5 1004

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Section: Introductionmentioning

confidence: 99%

Synthesis and Electrocatalytic Performance of Multi-Component Nanoporous PtRuCuW Alloy for Direct Methanol Fuel Cells

Chen

Wang

et al. 2015

Catalysts

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“…Due to alloying, ligament and grain size decreases, the surface strain of Pd lattice increases and the standard sharp peak at 2h & 40°was broad [20]. The single fcc phase which appeared at 2h = 33°correspond to a PdNi alloy, completely removed at 700°C (Fig.…”

Section: Resultsmentioning

confidence: 99%

“…Among various non-platinum cathode catalysts, palladium has attracted considerable attention due to its promising application potential as cathode electrocatalysts in proton exchange membrane fuel cells (PEMFCs) [10][11][12]. The interest in Pd is not only for the purpose to lower the cost of catalysts but pursuits an improved catalytic activity [13][14][15]. The catalytic activity of Pd can be modified by alloying with metals having smaller atomic size such as V, Cr, Fe, Co and Ni is particularly effective in enhancing the catalytic activity [16][17][18][19][20][21][22].…”

Section: Introductionmentioning

confidence: 99%

“…The interest in Pd is not only for the purpose to lower the cost of catalysts but pursuits an improved catalytic activity [13][14][15]. The catalytic activity of Pd can be modified by alloying with metals having smaller atomic size such as V, Cr, Fe, Co and Ni is particularly effective in enhancing the catalytic activity [16][17][18][19][20][21][22]. Due to the higher electronic density of nickel compared with the other metals in the first transition series, the metallic bond with palladium is stronger which results in increasing and improving the process of catalytic activity [23][24][25][26][27][28][29][30][31].…”

Section: Introductionmentioning

confidence: 99%

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Preparation, characterization and electrocatalytic activity for oxygen reduction reaction in PEMFCs of bimetallic PdNi nanoalloy

Zeid

Ibrahem

2017

Mater Renew Sustain Energy

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The modified polyol reduction method was used to prepare a carbon-supported bimetallic PdNi nanoalloys (BMNAs). The prepared catalyst was characterized using X-ray diffraction and transmission electron microscopy. The obtained data indicated that, the average particle size of the alloys in the range & 20-50 nm. The morphology structure shows uniformly distributed particles on the supported carbon surface. The catalytic activity of the compounds for oxygen reduction reaction was investigated by cyclic voltammetry and electrochemical polarization measurements in rotating disk electrodes. As a function of time and calcination temperature, the improved activity and stability were obtained at 300°C for 3 h.

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“…Xu et al [86] dealloyed a PdNiAl precursor alloy to make a rich-nanoporous PdNi alloy. The as-synthesized electrode displayed a uniform structure with an interconnected network of hollow channels with a 5 nm-diameter approximately.…”

Section: Non Carbon-supported Pd-alloysmentioning

confidence: 99%

Palladium-Based Catalysts as Electrodes for Direct Methanol Fuel Cells: A Last Ten Years Review

2016

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Platinum-based materials are accepted as the suitable electrocatalysts for anodes and cathodes in direct methanol fuel cells (DMFCs). Nonetheless, the increased demand and scarce world reserves of Pt, as well as some technical problems associated with its use, have motivated a wide research focused to design Pd-based catalysts, considering the similar properties between this metal and Pt. In this review, we present the most recent advancements about Pd-based catalysts, considering Pd, Pd alloys with different transition metals and non-carbon supported nanoparticles, as possible electrodes in DMFCs. In the case of the anode, different reported works have highlighted the capacity of these new materials for overcoming the CO poisoning and promote the oxidation of other intermediates generated during the methanol oxidation. Regarding the cathode, the studies have showed more positive onset potentials, as fundamental parameter for determining the mechanism of the oxygen reduction reaction (ORR) and thus, making them able for achieving high efficiencies, with less production of hydrogen peroxide as collateral product. This revision suggests that it is possible to replace the conventional Pt catalysts by Pd-based materials, although several efforts must be made in order to improve their performance in DMFCs.

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Nanoporous PdNi alloys as highly active and methanol-tolerant electrocatalysts towards oxygen reduction reaction

Cited by 102 publications

References 41 publications

Synthesis and Electrocatalytic Performance of Multi-Component Nanoporous PtRuCuW Alloy for Direct Methanol Fuel Cells

Synthesis and Electrocatalytic Performance of Multi-Component Nanoporous PtRuCuW Alloy for Direct Methanol Fuel Cells

Preparation, characterization and electrocatalytic activity for oxygen reduction reaction in PEMFCs of bimetallic PdNi nanoalloy

Palladium-Based Catalysts as Electrodes for Direct Methanol Fuel Cells: A Last Ten Years Review

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