Oxidation Peak Current Density Research Articles

Synthesis of shuttle‐shaped porous CuO in water microdroplets for increased hydrazine oxidation

Shuttle-shaped, porous copper oxide (CuO) microparticles were prepared from Cu(OH)2 in a water/cyclohexane interfacial reaction followed by heat treatments at different temperatures. The CuO catalysts produced high catalytic activity and good durability for hydrazine oxidation reaction (HOR). Among all catalysts, CuO catalyst heat treated at 200°C provided the highest HOR activity with an onset potential of −0.204 V and a high oxidation peak current density of 0.87 mA cm−2 of HOR. HOR performances of the CuO catalysts correlated to their porous structure and transition of different Cu species. These findings shed light on factors influencing HOR activity of CuO catalysts.

Influence of support material on the electrocatalytic activity of nickel oxide nanoparticles for urea electro-oxidation reaction

Nickel oxide nanoparticles were deposited on different carbon supports including activated Vulcan XC-72R carbon black (NiO/AC), multi-walled carbon nanotubes (NiO/MWCNTs), graphene (NiO/Gr) and graphite (NiO/Gt) through precipitation step followed by calcination at 400 °C. To determine the crystalline structure and morphology of prepared electrocatalysts, X-ray diffraction (XRD) and transmission electron microscopy (TEM) were employed. The electrocatalytic activity of NiO/carbon support electrocatalysts was investigated towards urea electro-oxidation reaction in NaOH solution using cyclic voltammetry, chronoamperometry and electrochemical impedance spectroscopy. Urea oxidation peak current density was increased in the following order: NiO/AC < NiO/MWCNTs < NiO/Gr < NiO/Gt. Chronoamperometry test also showed an increased steady state oxidation current density for NiO/Gt in comparison to other electrocatalysts. The increased activity and stability of NiO/Gt electrocatalyst encourage the application of graphite as an efficient and cost-saving support to carry metal nanoparticles for urea electro-oxidation reaction.

Enhanced electrocatalytic activity of NiO nanoparticles supported on graphite planes towards urea electro-oxidation in NaOH solution

Nickel oxide nanoparticles are fabricated onto graphite planes [NiO/Gt] by chemical precipitation of Ni(OH)2 particles with consecutive calcination at 400 °C. The formed electrocatalysts are characterized using X-ray diffraction (XRD) and Transmission electron microscopy (TEM). TEM images demonstrate the deposition of NiO nanoparticles on graphite surface through their crystallite lattice fringes with spacing values of 2.45 Å (111), 2.10 Å (200) and 1.48 Å (220). The electrocatalytic activity of NiO/Gt electrocatalyst is examined towards urea electro-oxidation in NaOH solution using cyclic voltammetry, chronoamperometry and electrochemical impedance spectroscopy. Urea oxidation peak current density is observed at NiO/Gt electrocatalyst containing 15 wt% NiO [NiO/Gt−15] at a potential value of +640 mV (Ag/AgCl) with a current density value of 17.63 mA cm−2. The loading amount of NiO in the prepared electrocatalyst significantly affects its electrocatalytic performance. NiO/Gt−15 exhibits the highest urea oxidation current density with the desired stability. The lower Tafel slope, charge transfer resistance and the higher exchange current density and diffusion coefficient values of urea molecules at NiO/Gt−15 surface elect its application as a promising electrocatalyst material during urea oxidation reaction in fuel cells.

Single Biosensor for Simultaneous Quantification of Glucose and pH in a Rat Brain of Diabetic Model Using Both Current and Potential Outputs.

Glucose and pH are two important indicators of diabetes mellitus. However, their dynamic changes at the same time in brain are still not clear, mainly due to a lack of a single biosensor capable of simultaneous quantification of two species in a live rat brain. In this work, a selective and sensitive ratiometric electrochemical biosensor was developed for simultaneously quantifying glucose and pH using both current and potential outputs in a rat brain of diabetic model. Here, glucose oxidase was first employed as a specific recognition element for both glucose and pH because the active center (FAD) could undergo a 2H+/2e- process. Moreover, an insensitive molecule toward pH and glucose was used as an inner-reference element to provide a built-in correction to improve the accuracy. The ratio between the oxidation peak current density of glucose and that of ABTS gradually increased with increasing concentration of glucose, and showed a good linearity in the range of 0.3-8.2 mM. Meanwhile, the midpotential difference between glucose oxidase and 2,2'-azino-bis (3-ethylbenzthiazoline-6-sulfonic acid) (ABTS) positively shifted with pH decreasing, leading to accurate determination of pH in the linear range of 5.67-7.65. Thus, combined with the unique properties of carbon fiber microelectrode, including easy to insert and good biocompatibility, the developed single biosensor was successfully applied to detect pH and glucose at the same time in hippocampus, striatum, and cortex in a live rat brain of diabetic model.

Morphology-dependent electrocatalytic performance of Fe2(MoO4)3 for electro-oxidation of methanol in alkaline medium

Electrochemically synthesized nanosphere, nanorod and nanotube Fe2(MoO4)3 at optimized temperature and current density are characterized with XRD, SEM, TEM, XPS. Crystal lattices of the three types Fe2(MoO4)3 detected by HRTEM are well matched with the simulation analysis results from Materials Studio 6.0 based on the inorganic crystal structure database (ICSD) data and the modified XRD lattice parameters. The ratios of Fe/Mo on the surface resulted from XPS analysis are 1.47, 1.63 and 2.22 respectively for nanosphere, nanorod and nanotube. The mixture of Fe2(MoO4)3 with polytetrafluoroethylene dispersion are coated on glass carbon substrate as electrode for electrocatalytic performance test by cyclic voltammetries in 0.1 mol/L KOH and 1 mol/L methanol electrolyte. Methanol oxidation peak current density of the Nanotube- Fe2(MoO4)3/GCEs electrode is 3.27 mA/cm2 higher than 2.8 mA/cm2 of platinum foil electrode, which shows enhanced catalytic activity of Nanotube-Fe2(MoO4)3/GCEs. The cyclic stability in terms of peak current retention are 91%, 92% and 88% respectively for Nanosphere-Fe2(MoO4)3/GCE, Nanorod-Fe2(MoO4)3/GCE and Nanotube-Fe2(MoO4)3/GCE electrode after 220 cycles. It is concluded that nanosized Fe2(MoO4)3 could be promising alternative non-noble electro-catalysts for electro-oxidation of methanol in alkaline medium.

A Robust Molecular Catalyst Generated In Situ for Photo- and Electrochemical Water Oxidation.

Water splitting is the key step towards artificial photosystems for solar energy conversion and storage in the form of chemical bonding. The oxidation of water is the bottle-neck of this process that hampers its practical utility; hence, efficient, robust, and easy to make catalytic systems based on cheap and earth-abundant materials are of exceptional importance. Herein, an in situ generated cobalt catalyst, [CoII (TCA)2 (H2 O)2 ] (TCA=1-mesityl-1,2,3-1H-triazole-4-carboxylate), that efficiently conducts photochemical water oxidation under near-neutral conditions is presented. The catalyst showed high stability under photolytic conditions for more than 3 h of photoirradiation. During electrochemical water oxidation, the catalytic system assembled a catalyst film, which proved not to be cobalt oxide/hydroxide as normally expected, but instead, and for the first time, generated a molecular cobalt complex that incorporated the organic ligand bound to cobalt ions. The catalyst film exhibited a low overpotential for electrocatalytic water oxidation (360 mV) and high oxygen evolution peak current densities of 9 and 2.7 mA cm-2 on glassy carbon and indium-doped tin oxide electrodes, respectively, at only 1.49 and 1.39 V (versus a normal hydrogen electrode), respectively, under neutral conditions. This finding, exemplified on the in situ generated cobalt complex, might be applicable to other molecular systems and suggests that the formation of a catalytic film in electrochemical water oxidation experiments is not always an indication of catalyst decomposition and the formation of nanoparticles.

NiCo2O4 hexagonal nanoplates anchored on reduced graphene oxide sheets with enhanced electrocatalytic activity and stability for methanol and water oxidation

We have synthesized highly active NiCo2O4-reduced graphene oxide (NiCo2O4- rGO) hybrid material as non-precious bi-functional electrocatalyst for effective oxidation of methanol and water. The hexagonal nanoplates of NiCo2O4 are grown on rGO sheets by two-step solution phase method. The physiochemical properties of NiCo2O4-rGO hybrid composite have been evaluated by powder X-ray diffraction, Raman spectroscopy, transmission electron microscopy, X-ray photoelectron spectroscopy and nitrogen sorption measurements. The electrocatalytic activity for methanol and water oxidation on NiCo2O4-rGO, NiCo2O4 and rGO electrodes is tested under alkaline conditions. Results show that the NiCo2O4-rGO hybrid shows higher methanol oxidation peak current density of 16.6mAcm−2 and lower onset potential (∼256mV) in methanol oxidation. Likewise, in water oxidation it shows earlier onset overpotential (∼300mV) and high current density (∼75mAcm−2) as well as smaller overpotential of ∼390mV is required to reach a current density of 10mAcm−2. In addition, the hybrid NiCo2O4-rGO electrode shows excellent catalytic stability in both methanol and water oxidation reactions. The improved electrocatalytic activity of NiCo2O4-rGO is attributed to resilient synergistic effects between NiCo2O4 and rGO sheets.

Formation of nanoporous NiCuP amorphous alloy electrode by potentiostatic etching and its application for hydrazine oxidation

Nanoporous NiCuP amorphous alloy (NPANiCuP) and nanoporous NiCu crystalline alloy (NPNiCu) have been prepared by potentiostatic etching of copper from the electroless NiCuP and NiCu alloy platings, respectively. The results of X-ray Diffraction (XRD), Energy Dispersion Spectrum (EDS) and Scanning Electron Microscopy (SEM) indicate that the NPA–NiCuP alloy is amorphous structure and shows a porous network structure with the pore size of 100–300 nm. The electrocatalytic oxidation of hydrazine in alkaline media is investigated by cyclic voltammetry (CV) and double potential step chronoamperometry (DPSCA). The results suggest that the proton diffusion coefficient of redox species and the reaction rate constant of the NPA–NiCuP alloy electrode in KOH solution are higher than those of the smooth electroless NiCuP amorphous (SA–NiCuP) and NP–NiCu alloy electrodes. In addition, the NPA–NiCuP electrode has higher anodic oxidation peak current density and lower onset oxidation potential of hydrazine in KOH solution than the SA–NiCuP and NP–NiCu electrodes. Finally, the CV measurement suggests that the NPA–NiCuP electrode has a relatively stable redox behavior.

A ternary nanocatalyst of Ni/Cr/Co oxides with high activity and stability for alkaline glucose electrooxidation

A novel ternary nanocatalyst of Ni-Cr-Co oxides is synthesized as anode electro-catalysts for glucose oxidation. The nanostructure is characterized by X-ray diffraction (XRD) and scanning electron microscope (SEM), which indicates that the catalyst particles are well dispersed with average size of 30nm when the calcination temperature is 500°C. The electrochemical performance is evaluated via cyclic voltammetry (CV). Compared with the bimetallic Ni-Cr and Ni-Co nanocatalysts, Ni-Cr-Co electrocatalysts exhibites more negative onset potential (0.4V) and high oxidation peak current density (23.8mAcm−2) in alkaline media towards glucose oxidation. Meanwhile, the results also show that the Ni-Cr-Co nanomaterial possesses good performance of anti-poisoning capability, reproducibility and long-time stability, which make it an excellent candidate for fuel cell electrocatalyst.

Novel graphitic carbon nitride/graphite carbon/palladium nanocomposite as a high-performance electrocatalyst for the ethanol oxidation reaction

Graphitic carbon nitride (g-C3N4) possesses high nitrogen content with excellent chemical and thermal stability, which also shows inherent electrochemical properties. Due to the extremely low electronic conductivity, pure g-C3N4 is usually restricted to electrocatalytic applications. In this study, we report the synthesis of graphite carbon (GC) supported g-C3N4 and palladium (Pd) electrocatalyst with excellent electronic conductivity for the ethanol oxidation reaction. In virtue of the ultra-thin structure of g-C3N4 deposited on the surface of GC, the crucial three-phase boundary from GC, g-C3N4 and Pd component are successfully formed in Pd@g-C3N4/GC electrocatalyst. The electrocatalytic performances on ethanol electrooxidation of Pd@g-C3N4/GC, Pd@g-C3N4, Pd@GC and Pd@amorphous carbon (AC) have been systematically investigated by the techniques of cyclic voltammetry and electrochemical impedance spectroscopy. The Pd@g-C3N4/GC displays the best electrocatalytic performances with a high oxidation peak current density of 2156A/g Pd and low on-set potential of 0.32V for the ethanol oxidation. The peak current density of Pd@g-C3N4/GC maintains at 1904A/g Pd after 200 continuous cyclic voltammetry cycles. The Pd@g-C3N4/GC composite material might be one of candidate electrocatalysts for the ethanol oxidation reaction in direct ethanol fuel cells.

Ammonia Oxidation at Electrochemically Platinum-Modified Microcrystalline and Polycrystalline Boron-Doped Diamond Electrodes

The electrochemical oxidation of ammonia was done at electrochemically Pt-modified microcrystalline and polycrystalline boron-doped diamond (BDD) thin films from sp3 Diamond Technologies and Element Six. The Pt electrodepositions were done by chronoamperometry and cyclic voltammetry using a 1 mM K2PtCl6 solution in 0.5 M H2SO4. The Pt-BDD electrodes were characterized by X-ray photoelectron spectroscopy, Raman spectroscopy, X-ray diffraction, and cyclic voltammetry. The Pt-BDD electrodes were compared by SEM and ammonia oxidation. At BDD electrodes, cyclic voltammetry depositions favors the formation of cubic and cauliflower Pt nanostructures at microcrystalline and polycrystalline BDD electrodes, respectively. On the other hand, chronoamperometry electrodeposition favors dendrite formation structures in both BDD electrodes. Platinum electrodeposited by chronoamperometry favors the formation of platinum (100) facets, which enhances ammonia oxidation. Pt-microcrystalline BDD showed the highest ammonia oxidation peak current densities when compared to Pt-polycrystalline BDD.

Control of CuO nanocrystal morphology from ultrathin “willow-leaf” to “flower-shaped” for increased hydrazine oxidation activity

Three CuO nanocrystal morphologies (willow-leaf, spiny, and flower-shaped) with different exposed crystal facets are prepared through a two-step liquid-phase procedure. The CuO crystals have high hydrazine oxidation reaction (HOR) activity and good stability. Flower-shaped CuO has the highest HOR activity and stability of the three forms, with a positive onset-potential of −0.14 V and a high oxidation peak current density of 5.23 mA cm−2. HOR activity of the CuO crystals correlates to the type of exposed crystalline facet.

Amperometric glucose sensor based on boron doped microcrystalline diamond film electrode with different boron doping levels

Boron doped microcrystalline diamond (BDMD) films with different boron concentrations were deposited on Si (100) by microwave plasma chemical vapor deposition in a gas mixture of CH4/H-2/TMB. The influence of boron concentration on the surface morphology, microstructure, and electrochemical properties of BDMD film electrodes was studied. It was found that boron dopants play an important role in the structural quality and electrochemical properties of BDMD film electrodes. The increase of doped boron concentration results in the reduction of diamond grain size and the domination of two peaks located at approximately 500 and 1220 cm(-1) in the Raman spectra. Marked differences are observed for BDMD film electrodes with various boron concentrations in impedance characteristics. The electron transfer reaction on BDMD film electrodes becomes faster and reversibility is improved with the increase of boron concentration. Meanwhile, the electrochemical reactions on the BDMD film electrodes become a diffusion controlled process. The non-enzymatic glucose sensors based on as-prepared BDMD film electrodes were developed. The glucose oxidation peak position and current density are dependent on the B/C ratio for the BDMD film electrodes. The results show that appropriate boron doping concentration can improve the conductivity and electrocatalytic activity of BDMD film electrodes. The BDMD film electrode with B/C ratio of 10 000 ppm exhibits the highest sensitivity of 96.88 mu A mM(-1) cm(-2), lowest detection limit of 0.018 mM and widest linear range of 0.1 to 5 mM. The developed nonenzymatic glucose sensors based on as-prepared BDMD film electrodes demonstrate selective detection of glucose in alkaline solution containing interfering species of ascorbic acid and uric acid.

Electrocatalytic Activity of Graphene-supported Pt-Cu Catalysts Prepared by an Impregnation Method for Methanol and Ethanol Oxidations

In this study, platinum (Pt) and Pt-copper (Cu) nanoparticles were synthesized on graphene sheets by an impregnation method, and their electrocatalytic activity for methanol and ethanol oxidations was investigated by cyclic voltammetry and electrochemical impedance spectroscopy. Experimental results demonstrate that, in comparison to graphene-supported Pt, graphene-supported Pt-Cu catalyst possesses enhanced efficiency for both methanol and ethanol electro-oxidations, which is reflected by a higher forward oxidation peak current density and a lower transfer resistance. This study indicates that Pt-Cu catalyst could be desirable catalyst candidates for both direct methanol and ethanol fuel cells.

Nickel-Cerium Alloys for Borohydride Oxidation

Nickel and nickel-cerium (Ni-Ce) alloys with different amounts of Ce (5 and 10 at.% Ce) have been prepared by arc melting and characterized by scanning electron microscopy and electron probe microanalysis based on energy dispersive X-ray spectroscopy, to investigate microstructure and to determine phase composition. Subsequently, Ni and Ni alloy-based electrodes were fabricated and studied for borohydride (BH4 -) oxidation in alkaline media by cyclic voltammetry and chronoamperometry in the temperature range 25 – 45 ºC. Preliminary results showed comparable BH4 - oxidation peak current densities obtained at three electrodes, with Ni95Ce5 electrode giving the highest current densities. Electrochemical data are modelled to obtain relevant kinetic parameters of BH4 - oxidation at these electrodes. Effect of electrolyte temperature on the evaluated parameters has been investigated as well.

Layer‐by‐Layer Assembly of Ferrocene‐Modified Linear Polyethylenimine Redox Polymer Films

Herein, both electrostatic and covalent layer-by-layer assembly were used for the construction of multicomposite thin films using a ferrocene-modified linear poly(ethylenimine) redox polymer (Fc-C6-LPEI) as the cationic polyelectrolye, and poly(acrylic acid) (PAA), poly(glutamic acid) (PGA), or glucose oxidase (GOX) as the negative polyelectrolyte. The assembly of the multilayer films was characterized by cyclic voltammetry (CV), UV/Vis spectroscopy, and ellipsometry with the enzymatic response of the films containing GOX being characterized via constant potential amperometry. CV measurements suggested that the successful buildup of multilayer films was dependent upon the nature of the anionic polyelectrolyte used. Electrostatic assembly of films composed of Fc-C6-LPEI and either PAA or PGA produced large oxidation peak current densities of 630 and 670 μA cm(-2), respectively, during cyclic voltammetry. Increased measured absorbance by UV/Vis spectroscopy and increased measured film thicknesses (400-600 nm) by ellipsometry provided additional evidence of successful film formation. In contrast, the films incorporating GOX that were electrostatically assembled surprisingly produced significantly lower electrochemical responses (12 μA cm(-2)), low absorbance values, and reduced film thicknesses (~15 nm), and glucose electro-oxidation current densities less than 1 μA cm(-2), which all suggested unstable or minimal film formation. Subsequently, we developed a covalent layer-by-layer approach to fabricate films of Fc-C6-LPEI/GOX by covalently linking the amine groups of Fc-C6-LPEI to the aldehyde groups of periodate-oxidized glucose oxidase. Covalent assembly of the Fc-C6-LPEI/GOX films produced oxidation peak current densities during cyclic voltammetry of 40 μA cm(-2) and glucose electro-oxidation current densities of 220 μA cm(-2). These films also showed an increase in their thicknesses (~140 nm) relative to the electrostatic GOX films. For the films containing either PAA or PGA, the pH of the polymer solutions used for construction was found to have a significant effect on the response of the multilayer films, and the electrochemical response of the Fc-C6-LPEI/PAA, Fc-C6-LPEI/PGA, or covalently assembled Fc-C6-LPEI/GOX films could be tuned by varying the number of bilayers (n=1-16) in the film. These results are important because this is the first report of the use of the novel Fc-C6-LPEI redox polymer in the successful development of multicomposite layer-by-layer films. The electrochemical response achieved with the covalently assembled Fc-C6-LPEI/GOX films demonstrates that this redox polymer and layer-by-layer assembly technique can be used for possible biosensor and biofuel applications, and the success of multiple anionic polyelectrolytes could lead to additional applications with other enzyme systems.

The electrocatalytic behavior of electrodeposited Ni-Mo-P alloy films towards ethanol electrooxidation

Ternary Ni–Mo–P thin films have been electrodeposited from citrate-based electrolyte onto graphite substrates for application as anode catalysts for ethanol electrooxidation. The operating deposition parameters were optimized to produce Ni–Mo–P alloy films of outstanding catalytic activity. The phase structure of the deposits was evaluated employing X-ray diffraction technique. Morphology and chemical composition of the deposited alloy films were studied using scanning electron microscopy and energy-dispersive X-ray analysis, respectively. The results demonstrated that the rate of Ni–Mo–P deposition increases with increasing the ammonium molybdate concentration in the plating electrolyte up to 10 g l−1. Also, the amount of Mo in the deposits increases with increasing the ammonium molybdate concentration up to 7.5 g l−1, and the maximum Mo content in the film was 9.1 at.%. The catalytic activity of Ni–Mo–P/C alloy films has been evaluated towards electrooxidation of ethanol in 1.0 M NaOH solution by using cyclic voltammetry and chronoamperometry. The catalytic performance of the prepared anodes as a function of the amount of Mo was studied. The results showed an increase in the oxidation peak current density of ethanol with increasing the Mo at.% in the deposited alloy films. Additionally, Ni–Mo–P/C electrodes displayed significantly improved catalytic activity and stability towards electrooxidation of ethanol compared with that of Ni–P/C electrode. Copyright © 2013 John Wiley & Sons, Ltd.

Nonionic surfactant-templated mesoporous carbon as an electrocatalyst support for methanol oxidation

Two carbons were synthesized for use as platinum electrocatalyst supports for methanol oxidation. For both materials, furfuryl alcohol was used as the carbon precursor; however, one (CPEG) was made using poly ethylene glycol as the pore former, while the other (CSRF) was produced using Pluronic® F127 as the soft template by organic–organic self-assembly. The CPEG and CSRF carbons were estimated from nitrogen physisorption experiments to be micro- and mesoporous, respectively. Platinum nanoparticles were deposited on each carbon as well as on Vulcan XC-72 carbon by the formic acid reduction method. The physicochemical properties of electrocatalysts were studied using X-ray diffraction (XRD), transmission electron microscopy (TEM), and energy dispersive X-ray analysis (EDX), and their electrochemical features were examined using cyclic voltammetry, chronoamperometry, and impedance spectroscopy. It was found that higher methanol oxidation peak current densities as well as lesser charge transfer resistance at electrode/electrolyte interface were obtained for Pt supported on CSRF as compared to those on Vulcan XC-72 carbon, owing to the higher specific surface area and larger total pore volume (696 m2 g−1 and 0.60 cm3 g−1, respectively) together with superior electrical conductivity of mesoporous CSRF. On the other hand, the lower surface area and pore volume of microporous CPEG substrate confined Pt nanoparticles deposition and thus made CPEG-supported Pt an inefficient methanol oxidation electrocatalyst.

Electrocatalytic Oxidation of Glucose on Highly Dispersed Ni-B/Nanoporous Cu Amorphous Alloy Electrode

通过酸腐蚀去合金法处理热扩散制备的铜基表面铜锌合金得到纳米多孔铜（NPC）材料．以NPC为载体，采用超声辅助化学镀制备Ni．B／NPC合金电极．x射线衍射（XRD）和扫描电镜（SEM）表明Ni—B／NPC电极呈现由高分散纳米颗粒组成的非晶态结构．计时电流法（cA）结果表明化学镀5min制备的Ni．B／NPC电极具有最大的电化学活性表面积（EASA）．循环伏安法（cv）结果表明，与块状镍电极相比，碱性介质中在Ni—B／NPC电极上葡萄糖起始氧化电位负移39mV，氧化峰电流提高了18．9倍．采用线性扫描伏安法（LSV）、CA和电化学阻抗谱（EIS）N定Ni—B／NPC电极对葡萄糖电催化氧化的电子转移系数㈣、电催化氧化反应速率常数（∞和葡萄糖的扩散系数（D）等动力学参数．结果表明高分散Ni．B／NPC非晶态合金电极对碱性介质中葡萄糖的氧化具有较高的电催化活性和稳定性．

Study on Pt-SnO&lt;sub&gt;2&lt;/sub&gt;/C Electrode Prepared by Different Content of Nafion for New Direct Ethanol Fuel Cells

A carbon supported Pt-SnO2/C catalyst was prepared by hydrothermal method .The Pt-SnO2/C electrode was prepared by electrostatic spinning. Factors of product in solution, different Nafion loading and different loading of Pt-SnO2/C catalyst were evaluated for their effects on ethanol oxidation reaction (EOR). Electrocatalyst was characterized by SEM,EDS and XRD. At the same time, Electrocatalyst was tested by cyclic voltammetry (CV) , Chronoamperometry, AC impedance at three-electrode under similar conditions to those of the DEFC. The results show that the Nafion loadings was 7.5wt.％, which the loading amount of Pt was 1.5mg•cm-2, the Pt-SnO2/C electrode has the highest activity for ethanol oxidation. Compared to the low potential, the oxidation peak current density was 2 times high obtained.