Electrocatalytic Oxidation Of Methanol Research Articles

Preparation of Nd2o3-Nise-Nc Nanosheets and its Electrocatalytic Oxidation of Methanol and Urea

Preparation of Nd2o3-Nise-Nc Nanosheets and its Electrocatalytic Oxidation of Methanol and Urea

Highly dispersed Cr oxygenated species on Pt nanowire assemblies for enhanced electrocatalytic methanol oxidation.

In this paper, Cr oxygenated species dispersed on Pt nanowire assemblies (PtCrOX NWs) were successfully prepared for the methanol oxidation reaction by a metal precursor dilution strategy. Notably, the PtCrOX NWs catalyst exhibits excellent performance for electrocatalytic methanol oxidation. Density functional theory results revealed that the doped Cr oxygenated species, which moderated the electronic structure of the Pt atoms, can significantly decrease the free energy of COOH* formation, thus leading to superior methanol oxidation performance.

Cos Mediated Ni(Oh)2 Nanoflakes for Robust Supercapacitor and Methanol Electrocatalytic Oxidation

Cos Mediated Ni(Oh)2 Nanoflakes for Robust Supercapacitor and Methanol Electrocatalytic Oxidation

Ultrahigh stable covalent organic framework-derived carbon–nitrogen-supported palladium nanoparticles for highly efficient electrocatalytic methanol and ethanol oxidation reactions

COF-derived nitrogen-doped-carbon structure supported palladium catalysts exhibited excellent EOR and MOR activities, much higher than those of commercial Pd/C, with good catalytic stability.

Spatial Decoupling of Dehydrogenation and Co Oxidation by Ni-Co-Ti Hierarchical Trimetallic Catalyst for Electrocatalytic Oxidation of Methanol

Spatial Decoupling of Dehydrogenation and Co Oxidation by Ni-Co-Ti Hierarchical Trimetallic Catalyst for Electrocatalytic Oxidation of Methanol

Renovating Phase Constitution and Construction of Pt Nanocubes for Electrocatalysis of Methanol Oxidation Via a Solvothermal-Induced Strong Metal-Support Interaction

Renovating Phase Constitution and Construction of Pt Nanocubes for Electrocatalysis of Methanol Oxidation Via a Solvothermal-Induced Strong Metal-Support Interaction

Constructing Amorphous/Amorphous Heterojunction Structure in Nickel Borate/Boride Hybrid Nanosheets for Efficient Electrocatalytic Methanol Oxidation

Constructing Amorphous/Amorphous Heterojunction Structure in Nickel Borate/Boride Hybrid Nanosheets for Efficient Electrocatalytic Methanol Oxidation

Minutely Surficial Functionalization of Ce-O-Pt Linkages on Pt/C for Enhanced Electrocatalytic Methanol Oxidation

Minutely Surficial Functionalization of Ce-O-Pt Linkages on Pt/C for Enhanced Electrocatalytic Methanol Oxidation

Highly Efficient Ptfe Alloy Catalyst for Electrocatalytic Methanol Oxidation with High Resistance to Co

Highly Efficient Ptfe Alloy Catalyst for Electrocatalytic Methanol Oxidation with High Resistance to Co

Minutely Surficial Functionalization of Ce-O-Pt Linkages on Pt/C for Enhanced Electrocatalytic Methanol Oxidation

Minutely Surficial Functionalization of Ce-O-Pt Linkages on Pt/C for Enhanced Electrocatalytic Methanol Oxidation

Minutely Surficial Functionalization of Ce-O-Pt Linkages on Pt/C for Enhanced Electrocatalytic Methanol Oxidation

Minutely Surficial Functionalization of Ce-O-Pt Linkages on Pt/C for Enhanced Electrocatalytic Methanol Oxidation

Physicochemical properties and antibacterial activity of Pt nanoparticles on TiO2 nanotubes as electrocatalyst for methanol oxidation reaction

TiO2 nanotubes were prepared electrochemically as pure Ti sheet in 0.5% HF anodized and annealed under nitrogen acquiring the TiO2 NTs-N2 support. By chemical deposition method using NaBH4 as reducing agent, platinum was deposited on TiO2 NTs-N2 support to gain the Pt NPs/TiO2 NTs-N2 electrocatalyst.Scanning electron microscopy (SEM) and X-ray diffraction (XRD) were applied for the physicochemical characterization of TiO2 NTs-N2 and Pt NPs/TiO2 NTs-N2. The XRD exhibited the an existence of platinum nanoparticles with an average crystallite size of 12 nm, which was regularly combined with TiO2 nanotubes. The Pt NPs/TiO2 NTs-N2 catalyst indicated considerably high electrocatalytic activity and stability for methanol electrocatalytic oxidation reaction in basic medium of KOH. The catalyst Pt NPs/TiO2 NTs-N2 was electrochemically characterized in a basic solution of methanol using cyclic voltammetry (CV) measurement in the absence and an existence of light. The higher poison tolerance and higher methanol oxidation current density observed for the Pt NPs/TiO2 NTs-N2 catalyst suggest that this catalyst supported on TiO2 NTs-N2 has a promising potential applications in the electro catalyst reactions. In addition, the synthesized platinum nanoparticles deposited on TiO2 nanotubes revealed a tremendous antibacterial effects against pathogenic microorganismm.

The Pt/g-C3N4-CNS catalyst via in situ synthesis process with excellent performance for methanol electrocatalytic oxidation reaction

g-C3N4-CNS prepared by the in situ synthetic method has a larger specific surface area and more anchoring sites for Pt, which promotes the dispersion of Pt and enhances the electrocatalytic performance.

Cobalt nanoparticles introduced to activated carbon, CoNP/AC, as an effective electrocatalyst for oxidation and determination of methanol and ethanol

Addressed herein, a glassy carbon electrode was modified by cobalt nanoparticles stuck to the activated carbon (CoNP/AC/GCE). The electrocatalytic oxidation of methanol and ethanol on the surface of the modified electrode in acidic setting was investigated using cyclic voltammetry (CV), linear sweep voltammetry (LSV) and chronoamperometry as the first report. The effect of some parameters such as the potential scan rate, type of electrolyte solution and concentration effect of methanol and ethanol on the modified electrode was investigated. The kinetic parameters such as I0 (exchange current) and k0 (intrinsic heterogeneous rate constant) for methanol and ethanol were obtained through Tafel plots. By comparing the values obtained for I0 and K0, it would be clear that the effect of electrode modification on the electro-oxidation kinetics of ethanol and methanol is very significant. Finally, the response trends for electrooxidation of the alcohols by the CoNP/AC/GCE confirmed the quantitative application of the modified electrode.

In Situ Synthesis of Surface-Mounted Novel Nickel(II) Trimer-Based MOF on Nickel Oxide Hydroxide Heterostructures for Enhanced Methanol Electro-Oxidation.

Engineering the heterogeneous interface fusing MOFs and inorganic active component is an effective strategy to improve the electrochemical performance. Herein, we report a new Ni3-based MOF (denoted as CTGU-24) with an infrequent two-fold interpenetrating 3D (3,8)-connected network constructed from Ni(II) trimer and mixed tripodal tectonics for the electrocatalytic methanol oxidation reaction (MOR). In order to improve its stability and activities, the heterogeneous hybrid CTGU-24@NiOOH has been fabricated successfully via the first preparation of the NiOOH nanosphere and then in situ formation of CTGU-24 decorated on the NiOOH surface. Moreover, the integration of CTGU-24@NiOOH and different additives [acetylene black (AB) and ketjen black (KB)], resulting in the optimized hybrid sample AB&CTGU-24@NiOOH (4:4). It attains better MOR performance with an area-specific peak current density of 34.53 mA·cm−2 than pure CTGU-24 (14.99 mA·cm−2) and improved durability in an alkali medium. The new findings indicate that the CTGU-24@NiOOH heterostructure formed in situ and the integration of moderate additives are critical to optimizing and improving electrocatalytic activity of pure MOF crystalline material.

Thermally driven interfacial diffusion synthesis of composition-controllable Pt-Pb bimetallic nanoparticles boosts oxygen reduction and methanol oxidation electrocatalysis

The exploration of fresh electrocatalysts with excellent performance for oxygen reduction and methanol oxidation is an emerging need for direct methanol fuel cells (DMFCs). However, the generally applied PtM catalysts also possess drawbacks which include limited catalytic activity, leaching of M, and insufficient long-term durability. In this work, we have successfully prepared a group of PtPb nanoparticle with excellent oxygen reduction activity and methanol oxidation activity. We focus the insights into the synergistic effect result from different composition on the electrocatalytic oxygen reduction and methanol oxidation. As a result of their controllable surface composition and favorable electronic interaction, the Pt1Pb1.5 NPs show enhanced electrocatalytic performance for oxygen reduction reaction (ORR) and methanol oxidation reaction (MOR). Facilitated by the introduction of properly composition of Pb, the Pt1Pb1.5 demonstrate mass activity of 1.39 mA mg−1 for ORR and exhibit specific activity of 1.32 mA cm−2 for MOR, which are 4.96 and 8.25 times higher than commercial Pt/C catalyst. This high-performance bifunctional catalyst indeed provides a guidance for future design of functional materials in the field of catalyst and energy conversion.

The significant promotion of g-C3N4 on Pt/CNS catalyst for the electrocatalytic oxidation of methanol

This article reported a series of g–C3N4–CNS (g-C3N4 and carbon nanosheets) composite carriers formed by the hydrothermal method, and then the ethylene glycol reduction method was used to anchor Pt nanoparticles on the g–C3N4–CNS carrier to form the Pt/g–C3N4–CNS catalysts. The electrochemical test for the electrocatalytic oxidation of methanol (MOR) shown that the Pt/20%g–C3N4–CNS catalyst has the best catalytic performance and stability. These Pt/g–C3N4–CNS catalysts were analyzed by TEM, XRD, XPS, and BET characterization. It is discovered that the amount of g-C3N4 greatly influenced the structure and chemical properties of Pt/CNS precursor. As the content of g-C3N4 increases, the content of pyridine nitrogen and pyrrole nitrogen also increases, and N species can enhance the interaction between Pt nanoparticles and CNS, promote Pt dispersion, and increase the specific surface area of the catalyst. Similarly, an excessive addition of g-C3N4 will cause a sharp decline in the conductivity of the catalyst, and then led to the decline of MOR activity.

Electrocatalytic Oxidation of Methanol over An Electrode with Ni‐MOF‐74 Catalyst

AbstractDeveloping non‐noble metal catalysts for methanol oxidation in fuel cells is of importance. In this work, Ni‐MOF‐74 was synthesized through a simple solvothermal method and fully characterized. The as‐made Ni‐MOF‐74 modified carbon paste electrode (Ni‐MOF‐74/CPE) was applied for methanol electrooxidation reaction in 0.1 M NaOH solution. Ni‐MOF‐74 had high electrochemical stability and exhibited good electrocatalytic property for methanol oxidation, a mechanism for the reaction was proposed, the current density increases impressively on Ni‐MOF‐74/CPE compared with carbon paste electrode, and a really high catalytic rate constant (kcat) of 8.1×105 cm3 ⋅ mol−1 ⋅ s−1 was obtained in this work. The given results indicate that Ni‐MOF‐74 can be a promising candidate of electrocatalysts for direct methanol fuel cells (DMFCs).

Rapid alloying of Au–Pd nanospheres by a facile pulsed laser technique: Insights into a molar-dependent electrocatalytic methanol oxidation reaction

Direct methanol fuel cells have attracted extensive research interest because of their relatively high energy density and portability. It is important to rationally design the composition and surface atomic structure by efficient synthesis protocols to boost cell efficiency. In this study, we employed cohesive pulsed laser irradiation and ultrasonochemical techniques to synthesize and tune the molar ratio of an Au–Pd alloy for the methanol oxidation reaction (MOR). The effective implementation of extremely rapid photoinduced reduction and reaction conditions resulted in the formation of well-dispersed and homogenous nanospheres of the Au–Pd alloy with uniform particle size. Moreover, the composition-tuned Au–Pd alloy exhibited an improved electrocatalytic activity, which might be due to its improved electrical conductivity and higher CO tolerance. The alloy achieved relatively high mass and specific activities of 0.50 A/mgPd and 1.36 mA/cmPd2, respectively. Additionally, we studied the effect of the Au–Pd composition on the MOR activity and analyzed the reaction kinetics in depth. This work provides the foundation for implementing a laser-based technique to synthesize Pd-based alloy electrocatalysts for MOR application.

Sub-Monolayer YOx /MoOx on Ultrathin Pt Nanowires Boosts Alcohol Oxidation Electrocatalysis.

A crucial issue restricting the application of direct alcohol fuel cells (DAFCs) is the low activity of Pt-based electrocatalysts for alcohol oxidation reaction caused by the reaction intermediate (CO*) poisoning. Herein, a new strategy is demonstrated for making a class of sub-monolayer YOx /MoOx -surface co-decorated ultrathin platinum nanowires (YOx /MoOx -Pt NWs) to effectively eliminate the CO poisoning for enhancing methanol oxidation electrocatalysis. By adjusting the amounts of YOx and MoOx decorated on the surface of ultrathin Pt NWs, the optimized 22% YOx /MoOx -Pt NWs achieve a high specific activity of 3.35mA cm-2 and a mass activity of 2.10 A mgPt -1 , as well as the enhanced stability. In situ Fourier transform infrared (FTIR) spectroscopy and CO stripping studies confirm the contribution of YOx and MoOx to anti-CO poisoning ability of the NWs. Density functional theory (DFT) calculations further reveal that the surface Y and Mo atoms with oxidation states allow COOH* to bind the surface through both the carbon and oxygen atoms, which can lower the free energy barriers for the oxidation of CO* into COOH*. The optimal NWs also show the superior activities toward the electro-oxidation of ethanol, ethylene glycol, and glycerol.