Platinum particles supported on titanium nitride: an efficient electrode material for the oxidation of methanol in alkaline media

Thotiyl, Muhammed Musthafa Ottakam; Ravikumar, T.; Sampath, S.

doi:10.1039/c0jm01600d

Cited by 83 publications

(42 citation statements)

References 65 publications

(105 reference statements)

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“…Methanol electrooxidation reaction has been widely studied in acidic media and less in alkaline solution [1][2][3][4][5][6][7][8][11][12][13][21][22][23]28,35 . It is well known that methanol electrooxidation undertakes parallel and by-side reactions.…”

Section: Figures 6 and 7 Depict The Voltammetric Profiles Of The Methmentioning

confidence: 99%

“…In this sense, theoretical calculations predict a strong interaction between TiC and Pt nanoclusters, with an important electron density transfer from the support to Pt, which leads to an enhancement of the adsorption strength of small molecules on Pt surface 26 27 . TiN-supported Pt electrodes have also been used for the methanol oxidation 28 and oxygen reduction reactions 29 in alkaline and acidic media, respectively. These studies reported high catalytic activity for both reactions.…”

Section: Introductionmentioning

confidence: 99%

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TiC, TiCN, and TiN Supported Pt Electrocatalysts for CO and Methanol Oxidation in Acidic and Alkaline Media

et al. 2013

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TiC, TiCN and TiN supported Pt nanoparticles have been investigated as anode electrocatalytic materials for direct methanol fuel cells (DMFCs). The catalysts were studied in acidic and alkaline media and compared with platinum supported on carbon black. CO and methanol oxidation were studied by voltammetry and chronoamperometry techniques. Transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS) and X-ray diffraction (XRD) analysis were employed to characterize the novel catalysts.Results show that carbon supported Pt catalyst is mainly formed by nanoparticles with long (111) domains and those catalysts with a titanium-based support present a huge amount of defect sites with diverse symmetries.Additionally to geometric factors, an electronic effect by the Ti-based support leads to a considerably enhance of CO electrooxidation with respect to carbon supported catalyst, which is of special relevance in alkaline media. However, no such improvement is observed during the methanol oxidation reaction on Tibased catalysts at high pH.

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Section: Figures 6 and 7 Depict The Voltammetric Profiles Of The Methmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

TiC, TiCN, and TiN Supported Pt Electrocatalysts for CO and Methanol Oxidation in Acidic and Alkaline Media

et al. 2013

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“…Recently, the activity of Pt electrocatalysts was improved by adding metal oxides, sulfides, carbides, and nitrides as promoters . Among them, metal‐oxide promoters are more efficient because they provide hydroxy sources for removal of carbonaceous species, such as adsorbed CO (CO ads ), at lower potentials .…”

Section: Introductionmentioning

confidence: 99%

“…Recently,t he activity of Pt electrocatalysts was improved by addingm etal oxides, sulfides, carbides, and nitrides as promoters. [3,4,[12][13][14][15][16][17][18][19] Among them, metal-oxide promoters are more efficient because they provide hydroxy sourcesf or removal of carbonaceouss pecies, such as adsorbed CO (CO ads ), at lower potentials. [12][13][14][15][16] Also, metal oxides stabilizeP tc rystallites and avoid their random growth and accumulation during device operation for longert imes.…”

Section: Introductionmentioning

confidence: 99%

A Vanadium(V) Oxide Nanorod Promoted Platinum/Reduced Graphene Oxide Electrocatalyst for Alcohol Oxidation under Acidic Conditions

Umeshbabu

Rao

2016

ChemPhysChem

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A Pt-V O /rGO ternary hybrid electrocatalyst was designed by using active vanadium(V) oxide (V O ) nanorods and reduced graphene oxide (rGO) components. The V O nanorods were synthesized by a simple polyol-assisted solvothermal method and were incorporated uniformly onto rGO sheets by intermittent microwave heating. Subsequently, Pt nanoparticles (2-3 nm in size) were deposited over the V O /rGO composite by the conventional polyol reflux method. The electrocatalytic performance of the Pt-V O /rGO ternary hybrid and bare Pt/rGO catalysts towards the oxidation of simple alcohols was evaluated in acidic media. The ternary hybrid catalyst exhibited higher electrocatalytic activity than bare Pt/rGO and also showed good stability. The higher electrocatalytic activity of the Pt-V O /rGO ternary hybrid was attributed to a synergistic effect among the Pt, V O , and rGO components. In addition, oxygen-containing species, such as OH groups, were generated on V O at lower potentials. These groups were able to scavenge intermediate species such as CO on the Pt surfaces and helped to regenerate the active sites on the Pt surface more effectively for the routine alcohol oxidation reaction.

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“…X-ray diffraction (XRD) demonstrates reflection from (111), (200), (220), (311) and (420) suggesting the crystallization of TiN in face centered cubic lattice, Figure 1c. [41][42][43] X-ray photo electron spectrum (XPS) shows features of oxynitride and oxide phases along with nitride phase which are characteristics of TiN surface, Figure 1d. [42,43] TiN was functionalized with Tetra amino Fe phthalocyanine (TAFePc) by diazotization technique, Scheme 1.…”

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confidence: 99%

An All Solid‐State Zinc−Air Battery with a Corrosion‐Resistant Air Electrode

et al. 2018

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We illustrate an all solid-state ZnÀair battery by utilizing the ability of a titanium-nitride-functionalized molecular catalyst to mediate the oxygen reduction reaction by avoiding the parasitic corrosion chemistry and the hydroxide-holding capacity of the Zirfon membrane. The efficient ionic communication between the half-cell electrodes provided by the Zirfon membrane in combination with the chemical/electrochemical stability of the TiN-based air electrode ultimately led to an all solid-state and air-breathing battery possessing high durability and stability.Electrochemical energy storage and conversion devices such as batteries, fuel cells and supercapacitors have the potential to address global warming and alarming pollution due to their near zero emission power output. [1][2][3][4][5][6][7] MetalÀair batteries are new generation batteries which are anticipated to contribute to long driving range per charge compared to conventional metal ion batteries. [8][9][10][11][12] The air electrode architecture is expected to increase gravimetric energy storage capability of the device since oxygen in principle can be accessed from atmosphere circumventing the storage of oxidant on board the device. [13][14][15] Though non aqueous Li air batteries are being pursued intensely across the world, aqueous ZnÀair batteries are much evolved and even used in commercial hearing aid devices. [16][17][18][19][20][21][22][23][24] However, oxygen reduction reaction (ORR), the cathodic halfcell reaction in air batteries often require precious metal based electrocatalyst to catalyze the 4 electron scission of molecular oxygen. [25][26][27][28][29] Usually Pt is supported on carbon which is known to undergo extensive corrosion in presence of oxygen and especially peroxide, the 2 electron product of ORR. [30][31][32] Pt is also known to catalyze carbon corrosion resulting in sintering and agglomeration of Pt nanoparticles and ultimately to the loss of precious metals. [33,34] We demonstrate that by replacing carbon with conducting titanium nitride (TiN), an extremely corrosion resistant as well as chemically stable material used in aberration industry, [35][36][37] carbon corrosion and its negative consequences can be addressed at the air electrode of metalair batteries. Further, we show a strategy for tuning the catalytic activity of this promising corrosion resistant catalytic support by simple diazotization reaction. [38] We have exploited the base reservoir capability of Zirfon PERL UTP 500 membrane for ionic communication between the half-cells. [39,40] To develop an all solid-state metalÀair battery. The results demonstrate that TiN based catalytic system outperforms carbon based catalysts in terms of long-term stability and durability ultimately leading to an all solid-state ZnÀair battery possessing a corrosion resistant air electrode.TiN particles were flake like with irregular morphology, scanning electron microscopic image, Figure 1a. Energy dispersive X-ray (EDX), Figure 1b, clearly indicates the constituent elements are m...

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Platinum particles supported on titanium nitride: an efficient electrode material for the oxidation of methanol in alkaline media

Cited by 83 publications

References 65 publications

TiC, TiCN, and TiN Supported Pt Electrocatalysts for CO and Methanol Oxidation in Acidic and Alkaline Media

TiC, TiCN, and TiN Supported Pt Electrocatalysts for CO and Methanol Oxidation in Acidic and Alkaline Media

A Vanadium(V) Oxide Nanorod Promoted Platinum/Reduced Graphene Oxide Electrocatalyst for Alcohol Oxidation under Acidic Conditions

An All Solid‐State Zinc−Air Battery with a Corrosion‐Resistant Air Electrode

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