A bimetallic Ni–Ti nanoparticle modified indium tin oxide electrode fabricated by the ion implantation method for studying the direct electrocatalytic oxidation of methanol

Yu, Yanan; Yang, Qinlan; Li, Xiansheng; Guo, Meisong; Hu, Jingbo

doi:10.1039/c5gc02551f

Cited by 21 publications

(14 citation statements)

References 47 publications

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“…Ni [7][8][9][10] and Nibased alloys reported to date, such as NiCu [11][12][13][14], NiFe [15], NiCo [16], NiMn [17] and NiTi [18,19] show excellent catalytic activities, but even in alkaline electrolytes, they lack of a satisfactory durability.…”

Section: Nimentioning

confidence: 99%

NiSn bimetallic nanoparticles as stable electrocatalysts for methanol oxidation reaction

Luo

Zuo

et al. 2018

Applied Catalysis B: Environmental

150

103

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Graphical abstract Scheme 1. NiSn nanoparticles towards methanol oxidation reactions Highlights A new colloidal synthesis route for 3-5 nm NiSn bimetallic nanoparticles with tuned Ni/Sn ratio was developed. The first study of the performance of NiSn as electrocatalysis of methanol oxidation reaction (MOR) is presented. NiSn electrodes showed excellent performance towards MOR, with the most Ni-rich alloy exhibiting mass current densities of 820 mA mg -1 at 0.70 V vs. Hg/HgO, comparable to state of the art Ni electrocatalysts. Stability of NiSn electrodes was clearly superior to that of Ni-based electrodes. NiNi 2+ CH 3 OH Ni 3+Products e e e e e e e e e e e e e e e e e e e e e e e e e e AbstractNickel is an excellent alternative catalyst to high cost Pt and Pt-group metals as anode material in direct methanol fuel cells. However, nickel presents a relatively low stability under operation conditions, even in alkaline media. In this work, a synthetic route to produce bimetallic NiSn nanoparticles (NPs) with tuned composition is presented. Through co-reduction of the two metals in the presence of appropriate surfactants, 3-5 nm NiSn NPs with tuned Ni/Sn ratios were produced. Such NPs were subsequently supported on carbon black and tested for methanol electro-oxidation in alkaline media. Among the different stoichiometries tested, the most Ni-rich alloy exhibited the highest electrocatalytic activity, with mass current density of 820 mA mg -1 at 0.70 V (vs. Hg/HgO). While this activity was comparable to that of pure nickel NPs, NiSn alloys showed highly improved stabilities over periods of 10000 s at 0.70 V. We hypothesize this experimental fact to be associated to the collaborative oxidation of the byproducts of methanol which poison the Ni surface or to the prevention of the tight adsorption of these species on the Ni surface by modifying its surface chemistry or electronic density of states.

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Section: Nimentioning

confidence: 99%

NiSn bimetallic nanoparticles as stable electrocatalysts for methanol oxidation reaction

Luo

Zuo

et al. 2018

Applied Catalysis B: Environmental

150

103

View full text Add to dashboard Cite

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“…[13][14][15][16] Additionally, Ni particles with sizes in the nanometer range have been produced to maximize the catalyst surface area and thus the density of surface site. [17][18][19][20] Besides composition and size, another fundamental parameter that strongly influence electrocatalytic activity is the catalyst exposed surface facets. [21][22][23] In related Pt catalyst, which has been more thoroughly studied, single crystal Pt (110) electrodes with more open atomic structures generally exhibit higher electrocatalytic activities than other facets.…”

Section: Introductionmentioning

confidence: 99%

Superior methanol electrooxidation performance of (110)-faceted nickel polyhedral nanocrystals

Zuo

Liu

et al. 2019

J. Mater. Chem. A

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“…The electrodes had scanned 50 cycles at a scan rate of 50 mV s −1 ranging from +0.3 V to +0.7 V. Low value of upper potential is applied to avoid over‐oxidization of the electrodes . Bare ITO shows no peak in NaOH electrolyte . In contrast, PEDOT : PSS/ITO and rGO/PEDOT : PSS/ITO electrodes exhibit increment in current in absence of methanol.…”

Section: Resultsmentioning

confidence: 93%

Electrocatalytic Acitivity of rGO/PEDOT : PSS Nanocomposite towards Methanol Oxidation in Alkaline Media

Baruah

Kumar

2018

Electroanalysis

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Increasing demand of alternative energy sources leads to the development of new electrocatalytic materials for fuel cells. In present work, we report the synthesis of rGO/PEDOT : PSS (reduced graphene oxide/ Poly (3,4‐ethylenedioxythiophene) : Polystyrene sulfonate) nanocomposite by in‐situ polymerization method using EDOT as precursor and the nanocomposite is used as anode catalyst for methanol oxidation. Structural and chemical characterizations such as XRD, FTIR and Micro‐Raman confirm the formation of the nanocomposite. From TEM image, growth of nanofibrous PEDOT : PSS on rGO nanosheets is observed. Electrochemical characterizations of rGO/PEDOT : PSS/ITO electrode are performed by Cyclic Voltammetry (CV), Electrochemical Impedance Spectroscopy (EIS) and Chronoamperometry (CA) measurements. Methanol oxidation reactions are performed in 0.5 M NaOH solution. The anodic current of the nanocomposite coated ITO is found be 37.5 mA at 0.59 V due to methanol electro‐oxidation and retentivity of the electrode is 92 % of initial scan after 800 cycles. The chronoamperometric results reveal that the nanocomposite modified electrode exhibits better stability with retention factor of 42.4 % up to 3000 seconds. The rGO/PEDOT : PSS/ITO electrode exhibits enhanced electrocatalytic activity towards methanol oxidation reaction due to larger surface area and excellent conductivity of rGO nanosheet.

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A bimetallic Ni–Ti nanoparticle modified indium tin oxide electrode fabricated by the ion implantation method for studying the direct electrocatalytic oxidation of methanol

Abstract: This study has investigated the oxidation of methanol (CH3OH) on a novel bimetallic Ni–Ti nanoparticle-modified indium tin oxide electrode (Ni–Ti NP/ITO) fabricated by the ion implantation method.

Cited by 21 publications

References 47 publications

NiSn bimetallic nanoparticles as stable electrocatalysts for methanol oxidation reaction

NiSn bimetallic nanoparticles as stable electrocatalysts for methanol oxidation reaction

Superior methanol electrooxidation performance of (110)-faceted nickel polyhedral nanocrystals

Electrocatalytic Acitivity of rGO/PEDOT : PSS Nanocomposite towards Methanol Oxidation in Alkaline Media

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