Facile synthesis of Pt3Ni alloy nanourchins by temperature modulation and their enhanced electrocatalytic properties

Chen, Meng; Du, Chunyu; Sun, Yanchun; Tan, Qiang; Du, Lei; Chen, Guangyu; Yin, Geping

doi:10.1016/j.jallcom.2015.05.102

Cited by 18 publications

(9 citation statements)

References 65 publications

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“…Pt‐based materials such as Pt/Cu nanoparticles, [8] Pt−Co alloys, [9] and Pt−Ni nanowires [10] have shown high catalytic activity for HER. Pt−Ni materials have attracted attention as electrocatalysts for alcohol oxidation, [11–13] oxygen evolution reaction (OER), [14,15] oxygen reduction reaction (ORR), [15–17] and peroxide sensors [18,19] …”

Section: Introductionmentioning

confidence: 99%

“…Pt-based materials such as Pt/Cu nanoparticles, [8] PtÀ Co alloys, [9] and PtÀ Ni nanowires [10] have shown high catalytic activity for HER. PtÀ Ni materials have attracted attention as electrocatalysts for alcohol oxidation, [11][12][13] oxygen evolution reaction (OER), [14,15] oxygen reduction reaction (ORR), [15][16][17] and peroxide sensors. [18,19] Materials that combine Pt and Ni in different compositions have exhibited an excellent catalytic activity for HER, such as PtÀ Ni nanowires, [10] Ni(OH) 2 -modified Pt electrodes, [20] PtNi nanoparticles, [14,21,22] PtNi nanodendrites, [23] and PtNiÀ O nanostructures.…”

Section: Introductionmentioning

confidence: 99%

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Galvanostatically Deposited PtNi Thin‐Films as Electrocatalysts for the Hydrogen Evolution Reaction

Medrano-Banda¹,

Crespo-Yapur²,

Velasco-Soto³

et al. 2022

ChemistryOpen

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The synthesis of hybrid platinum materials is fundamental to enable alkaline water electrolysis for cost-effective H 2 generation. In this work, we have used a galvanostatic method to codeposit PtNi films onto polycrystalline gold. The surface concentrations of Ni (Γ Ni ) and Pt (Γ Pt ) were calculated from electrochemical measurements; the Γ Pt /Γ Ni ratio and electrocatalytic activity of these materials towards hydrogen evolution reaction (HER) in 1 M KOH show a strong dependence on the current density pulse applied during the electrodeposition. Analysis of the Tafel parameters hints that, on these deposits, HER proceeds through a Volmer-Heyrovsky mechanism. The galvanostatically deposited PtNi layers present a high current output per Pt gram, 3199 A g Pt À 1 , which is significantly larger compared to other PtNi-based materials obtained by more extended and more complex synthesis methods.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Galvanostatically Deposited PtNi Thin‐Films as Electrocatalysts for the Hydrogen Evolution Reaction

Medrano-Banda¹,

Crespo-Yapur²,

Velasco-Soto³

et al. 2022

ChemistryOpen

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“…Shen and co-workers synthesize highyield and multibranched Pt 3 Ni alloy nanourchins by modulating the heating rates of the Pt and Ni acetylacetonates during the reduction process. 22 However, there are some disadvantages for this synthesis method, including the tedious operation progress, high experimental temperature, long reaction time, and difficulty in controlling the morphologies and growth kinetics of Pt-based nanocrystals. Therefore, a facile and efficient strategy is still urgent to obtain the Pt-based nanocatalysts with perfect structures.…”

Section: Introductionmentioning

confidence: 99%

“…Among them, urchin-like Pt-based nanocatalysts possessing a lot of branches and rough surface strongly promote the enhancement of their specific surface areas. Shen and co-workers synthesize high-yield and multibranched Pt 3 Ni alloy nanourchins by modulating the heating rates of the Pt and Ni acetylacetonates during the reduction process . However, there are some disadvantages for this synthesis method, including the tedious operation progress, high experimental temperature, long reaction time, and difficulty in controlling the morphologies and growth kinetics of Pt-based nanocrystals.…”

Section: Introductionmentioning

confidence: 99%

Facile Synthesis of Highly Active Three-Dimensional Urchin-like Pd@PtNi Nanostructures for Improved Methanol and Ethanol Electrochemical Oxidation

Ren

Liu

Wang

et al. 2018

ACS Appl. Nano Mater.

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Exploitation of highly active catalysts for alcohol electrooxidation is urgent for direct alcohol fuel cells (DAFCs). In this research, a facile and mild synthetic approach is utilized to control and tailor the morphology of the three-dimensional (3D) urchin-like Pd@PtNi nanostructures (NSs), and the formation mechanism of the as-prepared nanostructures is expounded in detail. The Pd@PtNi NSs exhibit outstanding electrochemical properties and remarkable durability toward both methanol and ethanol oxidation reaction (MOR and EOR) in alkaline solution. The electrochemically active surface area (ECSA) of the Pd@PtNi NSs is 59.5 m 2 g −1 , and their mass activities for MOR and EOR are 1614.3 and 1502.3 mA mg −1 , respectively, which are much higher than those of their ternary or binary alloy counterparts as well as commercial Pt black catalysts. Moreover, it still retains high current densities after catalyzing 10 000 s, while the current densities of other nanocatalysts reduce to nearly zero. The outstanding electrochemical activities and durability are owing to the specific 3D urchin-like nanostructures providing enormous active sites for catalytic reaction and the synergy effects between Pt, Pd, and Ni atoms. The 3D urchin-like Pd@PtNi NSs will enrich the electrocatalysts for DAFCs.

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“…The design of more open structures in Pt-based nanoalloys has accordingly emerged as a promising platform for attaining improved catalytic performance [ 8 ]. There have been significant achievements in the design and preparation of more cost-effective Pt alloys than pure Pt, which exhibit excellent catalytic activity in the ORR: for instance, nanoalloys of Pt with Fe, Co or Ni [ 9 , 10 , 11 , 12 ]. Typically, however, these have been synthesized using seed-activated/-mediated growth followed by annealing; a synthesis protocol that poses scale-up challenges and requires prolonged annealing time [ 5 , 13 , 14 , 15 , 16 ].…”

Section: Introductionmentioning

confidence: 99%

Solution-Grown Dendritic Pt-Based Ternary Nanostructures for Enhanced Oxygen Reduction Reaction Functionality

et al. 2018

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Nanoalloys with anisotropic morphologies of branched and porous internal structures show great promise in many applications as high performance materials. Reported synthetic approaches for branched alloy nanostructures are, however, limited by the synthesis using a seed-growth process. Here, we demonstrate a conveniently fast and one-pot solution-phase thermal reduction strategy yielding nanoalloys of Pt with various solute feed ratios, exhibiting hyperbranched morphologies and good dispersity. When Pt was alloyed with transition metals (Ni, Co, Fe), we observed well-defined dendritic nanostructures in PtNi, PtCo and Pt(NiCo), but not in PtFe, Pt(FeNi) or Pt(FeCo) due to the steric hindrance of the trivalent Fe(acac)3 precursor used during synthesis. In the case of Pt-based nanoalloys containing Ni and Co, the dendritic morphological evolution observed was insensitive to large variations in solute concentration. The functionality of these nanoalloys towards the oxygen reduction reaction (ORR); however, was observed to be dependent on the composition, increasing with increasing solute content. Pt3(NiCo)2 exhibited superior catalytic activity, affording about a five- and 10-fold enhancement in area-specific and mass-specific catalytic activities, respectively, compared to the standard Pt/C nanocatalyst. This solution-based synthetic route offers a new approach for constructing dendritic Pt-based nanostructures with excellent product yield, monodispersity and high crystallinity.

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Facile synthesis of Pt3Ni alloy nanourchins by temperature modulation and their enhanced electrocatalytic properties

Cited by 18 publications

References 65 publications

Galvanostatically Deposited PtNi Thin‐Films as Electrocatalysts for the Hydrogen Evolution Reaction

Galvanostatically Deposited PtNi Thin‐Films as Electrocatalysts for the Hydrogen Evolution Reaction

Facile Synthesis of Highly Active Three-Dimensional Urchin-like Pd@PtNi Nanostructures for Improved Methanol and Ethanol Electrochemical Oxidation

Solution-Grown Dendritic Pt-Based Ternary Nanostructures for Enhanced Oxygen Reduction Reaction Functionality

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