Highly Ordered Hierarchical Pt and PtNi Nanowire Arrays for Enhanced Electrocatalytic Activity toward Methanol Oxidation

Abstract

Highly ordered hierarchical Pt and PtNi nanowire arrays were prepared using CdS hierarchical nanowire arrays (HNWAs) as sacrificial templates and demonstrated high electrochemical active surface areas. For the resulting Pt HNWAs sample, the peak current for methanol oxidation at +0.74 V was almost 1 order of magnitude higher than that of Pt solid nanowire arrays prepared in a similar manner but without the use of CdS template, and the addition of a Ni cocatalyst effectively enhanced the tolerance against CO poisoning. The results demonstrated that highly ordered Pt and PtNi HNWAs may be exploited as promising anode catalysts in the application of direct methanol fuel cells.

Facile Synthesis Of Composition‐Controllable PtPdAuTe Nanowires As Superior Electrocatalysts For Direct Methanol Fuel Cells

“…forming binary or multielementn anostructures. [7][8][9] In recent years, am ass of binary or ternary Pt-based alloy nanomaterials have been reported. [1,[10][11][12] For example, Tang et al [1] synthesized binaryP tPd NWs with screwlike surfacethrough electrochemical deposition method, and different compositionsa nd morphologies PtPd alloys were obtained by regulating the upper potential limit.…”

“…To date, al arge number of excellent achievements on Ptbased NWs have been reported. [1,9,15,16] In addition, precise design and control the composition and size of Pt-based NWs could dramatically decrease the amount of Pt and increase the utilization of Pt reactive sites. Binary and ternary alloy nanomaterials generated by combining Pt with Pd and Au have been reporteda sa node catalysts for DAFCs.…”

Ultralong Ternary PtRuTe Mesoporous Nanotubes Fabricated by Micelle Assembly with a Self‐Sacrificial Template

“…Tailoring of the morphology and structure offers an important approach to enhance the catalytic performance of Pt‐based catalysts . Various Pt‐based nanomaterials with different morphology have been reported, such as nanoparticles, nanowires (NWs), nanofilms, and nanoflowers; these exhibit excellent performance in electrochemical applications . Benefiting from advantageous physical and chemical characteristics, 1D nanomaterials have attracted widespread attention .…”

“…[27][28][29][30][31] Various Pt-basedn anomaterials with differentm orphologyh aveb een reported, such as nanoparticles, nanowires (NWs), nanofilms, and nanoflowers; these exhibit excellentp erformance in electrochemical applications. [32][33][34][35] Benefiting from advantageous physical and chemical characteristics, 1D nanomaterials have attracted widespread attention. [36,37] The 1D Pt-basedn anomaterials show high efficiency of charge transportation, easy exposureo fa ctive sites,a nd anisotropy of morphology,w hich are conducive to improving the catalytic performance.…”

Bi‐Microporous Metal–Organic Frameworks with Cubane [M4(OH)4] (M=Ni, Co) Clusters and Pore‐Space Partition for Electrocatalytic Methanol Oxidation Reaction

“…[3] One key issue for DMFC technology is the fabrication of cost-effective and high-efficiencye lectrocatalysts for the anodic methanol oxidation reaction. [4] Therefore,t he search for efficient, durable,a nd inexpensive alternatives to Pt-based catalysts is of utmost importance.A lthough Ni-based nanomaterials [5] such as NiO, [6] Ni(OH) 2 , [7] nickel layered double hydroxide-(Ni-LDH), [8] and PtNi [9] and NiCu [10] alloy particles have been studied as promising candidates for electrochemical MOR, the tendencyf or nanoparticles to aggregate and the deactivation by harmful intermediates are factors limiting their applications.…”