Simultaneous formation of trimetallic Pt-Ni-Cu excavated rhombic dodecahedrons with enhanced catalytic performance for the methanol oxidation reaction

Tang, Min; Luo, Shuiping; Wang, Kai; Du, Hao; Sriphathoorat, Rinrada; Shen, Pei Kang

doi:10.1007/s12274-018-2063-3

Cited by 57 publications

(27 citation statements)

References 60 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…As a result, the unstable Ni atoms can be partially dissolved by the Br − /O 2 pairs, leading to the activated {100} facets. Then, the newly formed atoms prefer to deposit on these sites, and keep growing along the <100> directions (Wang et al, 2016 ; Tang et al, 2018 ). At the same time, the adsorption of CO on the {111} facets is stronger than the adsorption of Br − on the {100} facets, hindering the growth along <111> directions (Huang et al, 2010 ).…”

Section: Resultsmentioning

confidence: 99%

Controlled Synthesis of PtNi Hexapods for Enhanced Oxygen Reduction Reaction

et al. 2018

Self Cite

View full text Add to dashboard Cite

Well-defined PtNi nanocrystals represent one of the most efficient electrocatalysts to boost the oxygen reduction reaction (ORR), especially in the shape of octahedrons, nanoframes, and nanowires. However, the synthesis of complex PtNi nanostructure is still a great challenge. Herein, we report a new class of PtNi hexapods with high activity and stability toward ORR. The hexapods are prepared by selective capping and simultaneous corrosion. By controlling the oxidative etching, PtNi polyhedrons and nanoparticles are obtained, respectively. The intriguing hexapods are composed of six nanopods with an average length of 12.5 nm. Due to their sharp tips and three-dimensional (3D) accessible surfaces, the PtNi hexapods show a high mass activity of 0.85 A mgPt-1 at 0.9 V vs. RHE, which are 5.4-fold higher than commercial Pt/C, also outperforming PtNi polyhedrons and PtNi nanoparticles. In addition, the mass activity of PtNi hexapods maintains 92.3% even after 10,000 potential cycles.

show abstract

Section: Resultsmentioning

confidence: 99%

Controlled Synthesis of PtNi Hexapods for Enhanced Oxygen Reduction Reaction

et al. 2018

Self Cite

View full text Add to dashboard Cite

show abstract

“…Of them, introducing a second metal (e.g., Pd, Cu, Ru and Ni) alloyed with Pt is the one of the most widely used method. [16][17][18][19][20][21] The enhancement in the catalytic properties for MOR can be understood by bifunctional mechanism and/or ligand effect through improving the tolerance of Pt toward CO poisoning. 22 For example, Sun and co-workers reported the synthesis of single-crystalline dendritic Pt 3 Cu nanocubes with the mass activity being 5.2 times higher than that of commercial Pt/C for MOR.…”

Section: Introductionmentioning

confidence: 99%

Facile synthesis of ternary PtPdCu alloy hexapods as highly efficient electrocatalysts for methanol oxidation

Gao

et al. 2020

RSC Adv.

View full text Add to dashboard Cite

show abstract

“…[15] Thus the incorporation of functional non-noble 3d transition metalss uch as Co, Fe, Ni, and Cu is an effective strategy to improve the electrocatalytic activity. [16] At present, Pt-based binary alloys (PtNi-Ni, [17] PtNi, [18] PtNi nanocages, [19] PtCo, [20] Pt 3 Co, [21] PtPd) [22] and ternary alloys (Pt-Ni-Co, [23] carbon nanotubes-PdAu/Pt, [24] Pt-Cu-Ni, [25] Pt-Ni-Cu [26] )h ave been designed for electrochemical research. These electrocatalysts have high HER performance, such as lowo verpotential, small Ta fel slope, and long-term stability.A mong such efficient catalysts, the 3d transition metal Ni is commonly utilized and especially prominent due to its low price, high abundance,g ood corrosion resistance, and excellent electrical conductivity.T hese resultsa re encouraging, but most of them are not satisfactory as ar esult of the complex processes for catalystp reparation, extremely low yield, and lavish Pt loading.…”

Section: Introductionmentioning

confidence: 99%

Facile and Large‐Scale Fabrication of Sub‐3 nm PtNi Nanoparticles Supported on Porous Carbon Sheet: A Bifunctional Material for the Hydrogen Evolution Reaction and Hydrogenation

Liu

et al. 2019

Chemistry A European J

View full text Add to dashboard Cite

Facile and large‐scale preparation of materials with uniform distributions of ultrafine particles for catalysis is a challenging task, and it is even more difficult to obtain catalysts that excel in both the hydrogen evolution reaction (HER) and hydrogenation, which are the corresponding merging and splitting procedures of hydrogen, respectively. Herein, the fabrication of ultrafine bimetallic PtNi nanoparticles embedded in carbon nanosheets (CNS) by means of in situ self‐polymerization and annealing is reported. This bifunctional catalyst shows excellent performance in the hydrogen evolution reaction (HER) and the hydrogenation of p‐nitrophenol. Remarkably PtNi bimetallic catalyst with low metal loading (PtNi2@CNS‐600, 0.074 wt % Pt) exhibited outstanding HER activity with an overpotential as low as 68 mV at a current density of 10 mA cm−2 with a platinum loading of only 0.612 μgPt cm−2 and Tafel slope of 35.27 mV dec−1 in a 0.5 m aqueous solution of H2SO4, which is comparable to that of the 20 % Pt/C catalyst (31 mV dec−1). Moreover, it also shows superior long‐term electrochemical durability for at least 30 h with negligible degradation compared with 20 % Pt/C. In addition, the material with increased loading (mPtNi2@CNS‐600, 2.88 % Pt) showed robust catalytic activity for hydrogenation of p‐nitrophenol at ambient pressure and temperature. The catalytic activity towards hydrogen splitting is a circumstantial evidence that agrees with the Volmer–Tafel reaction path in the HER.

show abstract

Simultaneous formation of trimetallic Pt-Ni-Cu excavated rhombic dodecahedrons with enhanced catalytic performance for the methanol oxidation reaction

Cited by 57 publications

References 60 publications

Controlled Synthesis of PtNi Hexapods for Enhanced Oxygen Reduction Reaction

Controlled Synthesis of PtNi Hexapods for Enhanced Oxygen Reduction Reaction

Facile synthesis of ternary PtPdCu alloy hexapods as highly efficient electrocatalysts for methanol oxidation

Facile and Large‐Scale Fabrication of Sub‐3 nm PtNi Nanoparticles Supported on Porous Carbon Sheet: A Bifunctional Material for the Hydrogen Evolution Reaction and Hydrogenation

Contact Info

Product

Resources

About