Catalysts For Methanol Oxidation Reaction Research Articles

Competitive coordination-induced assembling of Ni-mof/NiFe-ldh heterostructure for enhanced electrocatalytic methanol oxidation

Direct methanol fuel cells (DMFCs) can permit the utilization of noble-metal-free electrocatalysts, which certainly reduces the cost and accelerates their practical implementation. With the exploration of efficient and economical methanol oxidation reaction (MOR) catalysts, Ni-based nanostructures have been recognized as the most promising MOR catalysts in alkaline media. Herein, we construct a novel heterojunction MOR electrocatalyst composed of Ni-based metal-organic framework (Ni-MOF) and NiFe-based layered double hydroxides (LDHs) through a coordination-induced self-assembly strategy. Owing to the synergic effect between Ni and Fe sites, coupled with the effect of hetero-interface, the resultant Ni-MOF/NiFe-LDH composite exhibits remarkable MOR activity in 0.1 M KOH electrolyte with the oxidation current density (32.66 mA cm−2) is 2.65 and 2.44 times higher than that of the primitive NiFe-LDH and Ni-MOF. The excellent stability of the Ni-MOF/NiFe-LDH electrocatalyst has also been confirmed by long-term chronoamperometry (CA) analysis. Our work paves a facile controllable way for fabricating MOF/LDH heterostructure targets on MOR and underlines its potential to boost energy conversion efficiency through the manipulation of synergic components.

Pt1.8Pd0.2CuGa Intermetallic Nanocatalysts with Enhanced Methanol Oxidation Performance for Efficient Hybrid Seawater Electrolysis.

Seawater electrolysis is a potentially cost-effective approach to green hydrogen production, but it currently faces substantial challenges for its high energy consumption and the interference of chlorine evolution reaction (ClER). Replacing the energy-demanding oxygen evolution reaction (OER) with the methanol oxidation reaction (MOR) represents a promising alternative, as the MOR occurs at a significantly low anodic potential, which cannot only reduces the voltage needed for electrolysis but also completely circumvents the ClER. To this end, developing high-performance MOR catalysts is a key. Herein, we report a novel quaternary Pt1.8Pd0.2CuGa/C intermetallic nanoparticles (i-NPs) catalyst, which shows a high mass activity (11.13 A mgPGM -1), a large specific activity (18.13mA cmPGM -2), and outstanding stability toward alkaline MOR. Advanced in-situ surface-enhanced Raman spectroscopy (SERS), online differential mass spectrometry (DEMS) and density functional theory (DFT) calculations reveal that the introduction of atomically distributed Pd in Pt2CuGa intermetallic markedly promotes the oxidation of key reaction intermediates by enriching electron concentration around Pt sites, resulting in weak adsorption of carbon-containing intermediates and favorable adsorption of the synergistic OH- groups near Pd sites. Using Pt1.8Pd0.2CuGa/C i-NPs as anodic catalysts, we demonstrate MOR-assisted seawater electrolysis that continuously operates under 1.23V for 240h in simulated seawater and 120h in natural seawater without notable degradation, showing great potential for energy-saving and cost-competitive hydrogen production from seawater. This article is protected by copyright. All rights reserved.

Cascaded p-d Orbital Hybridization Interaction in Ultrathin High-Entropy Alloy Nanowires Boosts Complete Non-CO Pathway of Methanol Oxidation Reaction.

Designing high efficiency platinum (Pt)-based catalysts for methanol oxidation reaction (MOR) with high "non-CO" pathway selectivity is strongly desired and remains a grand challenge. Herein, PtRuNiCoFeGaPbW HEA ultrathin nanowires (HEA-8 UNWs) are synthesized, featuring unique cascaded p-d orbital hybridization interaction by inducing dual p-block metals (Ga and Pb). In comparison with Pt/C, HEA-8 UNWs exhibit 15.0- and 4.2-times promotion of specific and mass activity for MOR. More importantly, electrochemical in situ FITR spectroscopy reveals that the production/adsorption of CO (CO* ) intermediate is effectively avoided on HEA-8 UNWs, leading to the complete "non-CO" pathway for MOR. Theoretical calculations demonstrate the optimized electronic structure of HEA-8 UNWs can facilitates a lower energy barrier for the "non-CO" pathway in the MOR.

Unraveling the electro-oxidation steps of methanol on a single nanoparticle by in situ nanoplasmonic scattering spectroscopy

Understanding the mechanism of methanol oxidation reaction (MOR) remains a challenge in the development of direct methanol fuel cells. Large-scale investigations of the MOR encounter issues related to mass transfer and averaging effects. To address these limitations, exploring the MOR on the surfaces of individual nanocatalyst and precisely identifying the reaction steps can yield valuable insights into the underlying pathways. In this study, we employed in situ nanoplasmonic resonance scattering spectroscopy to dynamically monitor the MOR process on single gold nanorod particles (GNPs) and Pt-coated gold nanoparticles (Pt-GNPs). We observed the evolution of metal hydroxides, which was assumed as the active species. Notably, the dynamic behavior of the surface atomic layers revealed the rate-determining steps for both the GNPs and Pt-GNPs, indicating competitive adsorption of intermediates on the nanocatalyst surface. The resulting inherent reaction mechanism highlights the thermodynamics-dependent catalysts’ redox processes and their surface adsorptions, which holds significance for advancing highly active MOR catalysts.

Platinum Alloys for Methanol Oxidation Electrocatalysis: Reaction Mechanism and Rational Design of Catalysts with Exceptional Activity and Stability

Direct methanol fuel cells have emerged as highly promising energy conversion devices in the past few decades. However, some challenges, such as carbon monoxide (CO) poisoning and unsatisfactory long-term stability, remain for platinum (Pt) as a methanol oxidation reaction (MOR) catalyst. This review covers recent advances in Pt alloy MOR catalysts and provides some insights. This review presents MOR catalytic mechanisms based on CO or non-CO pathways. Typical dimension-based designs of MOR catalysts, such as anisotropic nanowires, metallene, nanoframes, and corresponding rationales for performance enhancements, are introduced. More importantly, some key tuning strategies are elaborated, including intermetallic compound synthesis, interface engineering, and surface facet engineering. High-entropy alloys as an intriguing class of MOR catalysts with favorable prospects are also discussed. Finally, future directions and opportunities are outlined.

Strontium doped Fe-based porous carbon for highly efficient electrocatalytic ORR and MOR reactions

The catalytic activity improvement of Fe-based active sites derived from metal organic frameworks toward oxygen reduction reaction (ORR) and methanol oxidation reaction (MOR) remains a major challenge. In this study, the growth of strontium decorated 2-methylimidazole zinc salt (Sr/ZIF-8) is prepared as a carrier to vapor deposited iron formation Sr doped Fe-based nitrogen-doped carbon framework (named as Sr/FeNC). After high-temperature pyrolysis and vapor deposition, strontium carbonate nanocrystals are evenly dispersed on the shrunk dodecahedron carbon frame and multitudinous Fe-based active catalytic sites are embedded in carbon skeleton. The optimal Sr/FeNC-2 catalyst demonstrates the outstanding ORR performance in terms of a half-wave potential of 0.851 V and an onset potential of 0.90 V, while Sr/FeNC-2 exhibits a high current density of 18.2 mA cm−2 and a lower Tafel slope of 21 mV dec-1 in MOR. The exceptional catalytic activity could be ascribed to the synergistic coupling effect of strontium compounds with Fe-based catalytic sites (Fe-Nx, Fe, and iron oxide). In particular, the formation of SrCO3 affects the bonding configuration of the iron species sites, leading to an optimization of the electronic structure within the multihole carbon matrix. The synthetic approach presents a prospective strategy for future endeavors in developing innovative and advanced bifunctional catalysts for ORR and MOR.

In-situ synthesis of Cr2O3-enhanced bifunctionality in walnut-like Pt/CrN for methanol-assisted high-efficiency hydrogen generation

Methanol-assisted water electrolysis offers a promising alternative for low-voltage green hydrogen generation. Herein, we report the design and in-situ synthesis of Cr2O3, achieved by pyrolyzing a coordination polymer, to serve as cocatalysts. The Cr2O3 cocatalyst enhances the bifunctionality of the walnut-like Pt/CrN catalyst, leading to remarkable electrocatalytic activity in the methanol oxidation reaction (MOR) and hydrogen evolution reaction (HER) compared to Pt/CrN catalyst. Experimental data confirmed that Cr2O3 as a promoter accelerates the water dissociation, resulting in the formation of OHad. Additionally, it reduces the d-band center of Pt, favoring the optimization of the Gibbs free energy of intermediates. Moreover, the walnut-like Cr2O3–CrN facilitates mass diffusion and electron transfer. The synergistic effect between Cr2O3 and CrN, along with the presence of a hetero-interface, contributes to the enhancement of MOR/HER electrocatalytic activity. Thanks to these advantageous characteristics, the as-prepared Pt/Cr2O3–CrN catalysts exhibit superior MOR/HER performance, achieving a mass activity of 1.425 A mgPt−1 for MOR and an overpotential of 42 mV at a current density of 10 mA cm−2. Furthermore, with the Pt/Cr2O3–CrN as a bifunctional catalyst for both MOR and HER, the methanol-assisted electrolyzer only requires a cell voltage of 0.628 V to deliver a current density of 10 mA cm−2 for 10 h.

Design and catalytic performance of Cu/γ-Al2O3 for electrocatalytic methanol oxidation reaction by using density functional theory and molecular dynamics

The electrocatalytic activity of methanol oxidation reaction (MOR) on Cu/γ-Al2O3 and the growth behavior of Cu on γ-Al2O3 are investigated by using density functional theory and molecular dynamics. It is found that the interaction between the Cu3 cluster and γ-Al2O3(110) is stronger than that between the Cu4 cluster and γ-Al2O3(110). Consequently, the d-band center of the Cu3 cluster locates close to the Fermi level compared to the d-band center of the Cu4 cluster, resulting in high electrocatalytic MOR activity on Cu3/γ-Al2O3(110). The electrocatalytic MOR pathway is non-CO pathway on Cu3/γ-Al2O3(110). The highest Gibbs free energy pathway is CH3O* → CH2O*, which the Gibbs free energy is 0.53 eV. To achieve a high proportion of 2D Cu cluster on γ-Al2O3, it is recommended to prepare the catalyst at temperatures below 500 K with Cu loading below 21.78 wt%. These findings provide valuable insights into the design of MOR catalysts.

NiFe2O4/Ti3C2 nanocomposite as an efficient catalyst for methanol electro-oxidation reaction: Investigating annealing temperature and synergetic effect

In the present work, NiO/Ti3C2, γ-Fe2O3/Ti3C2, and NiFe2O4/Ti3C2 nanocomposites were prepared via hydrothermal method. The influence of annealing temperature on the crystalline structure and subsequently, on the electrocatalytic performance was investigated by characterization and electrochemical processes. The presence of Ti3C2 Mxene substrate improved the electron transfer kinetics of NiFe2O4 spinel nanoparticles. In addition, due to the synergistic effect of nickel and iron elements in the structure of NiFe2O4, the NiFe2O4/Ti3C2 nanocomposite showed better electrochemical activity and stability compared to the single metal oxides (NiO and γ-Fe2O3). Based on the results, NiFe2O4/Ti3C2 nanocomposite annealed at 200 °C, showed the highest current density (24 mA cm−2) and the most stable catalytic performance (90.6%) compared to other temperatures. This nanocatalyst can be proposed as a promising catalyst for methanol oxidation reactions in direct alcohol fuel cells.

Co Ion‐, NiS2‐ and CNT‐Co‐Doped Nanoflower/Hollow Spherical NiO Nanocomposites for Efficient Electrocatalytic Oxidation of Methanol

AbstractNowadays, the development and utilization of clean energy are becoming increasingly urgent. Among them, methanol is a new, clean, and efficient energy source. Therefore, more and more studies are focusing on methanol anodic oxidation (MOR). In this work, nanoflower and hollow spherical NiO was synthesized by a simply hydrothermal method and then modified by Co ion, NiS2 and carbon nanotubes (CNTs). The optimal Co/NiO(f)/NiS2−CNT exhibits flower‐like morphology with a larger specific surface area, enlarged electrochemically active surface area and higher conductivity, which improve the electron transfer ability and electrocatalytic activity compared with pure NiO(f), NiO(f)/NiS2, NiO(f)/NiS2−CNT and hollow spherical Co/NiO(hs)/NiS2−CNT. The current density is ultrahigh of 203.46 mA ⋅ cm−2 at 0.8 V, which is 36 times higher than pure NiO(f) and almost 2 times higher than Co/NiO(hs)/NiS2−CNT. Therefore, this work offers a highly efficient and stable NiO based catalyst for methanol oxidation reaction.

Defect Rich Structure Activated 3D Palladium Catalyst for Methanol Oxidation Reaction.

Controlling the structure and properties of catalysts through atomic arrangement is the source of producing a new generation of advanced catalysts. A highly active and stable catalyst in catalytic reactions strongly depends on an ideal arrangement structure of metal atoms. We demonstrated that the introduction of the defect-rich structures, low coordination number (CN), and tensile strain in three-dimensional (3D) urchin-like palladium nanoparticles through chlorine bonded with sp-C in graphdiyne (Pd-UNs/Cl-GDY) can regulate the arrangement of metal atoms in the palladium nanoparticles to form a special structure. In situ Fourier infrared spectroscopy (FTIR) and theoretical calculation results show that Pd-UNs/Cl-GDY catalyst is beneficial to the oxidation and removal of CO intermediates. The Pd-UNs/Cl-GDY for methanol oxidation reaction (MOR) that display high current density (363.6 mA cm-2) and mass activity (3.6 A mgPd-1), 12.0 and 10.9 times higher than Pd nanoparticles, respectively. The Pd-UNs/Cl-GDY catalyst also exhibited robust stability with still retained 95% activity after 2000 cycles. A defects libraries of the face-centered cubic and hexagonal close-packed crystal catalysts (FH-NPs) were synthesized by introducing chlorine in graphdiyne. Such defect-rich structures, low CN, and tensile strain tailoring methods have opened up a new way for the catalytic reaction of MOR.

Defect Rich Structure Activated 3D Palladium Catalyst for Methanol Oxidation Reaction

AbstractControlling the structure and properties of catalysts through atomic arrangement is the source of producing a new generation of advanced catalysts. A highly active and stable catalyst in catalytic reactions strongly depends on an ideal arrangement structure of metal atoms. We demonstrated that the introduction of the defect‐rich structures, low coordination number (CN), and tensile strain in three‐dimensional (3D) urchin‐like palladium nanoparticles through chlorine bonded with sp‐C in graphdiyne (Pd‐UNs/Cl‐GDY) can regulate the arrangement of metal atoms in the palladium nanoparticles to form a special structure. In situ Fourier infrared spectroscopy (FTIR) and theoretical calculation results show that Pd‐UNs/Cl‐GDY catalyst is beneficial to the oxidation and removal of CO intermediates. The Pd‐UNs/Cl‐GDY for methanol oxidation reaction (MOR) that display high current density (363.6 mA cm−2) and mass activity (3.6 A mgPd−1), 12.0 and 10.9 times higher than Pd nanoparticles, respectively. The Pd‐UNs/Cl‐GDY catalyst also exhibited robust stability with still retained 95 % activity after 2000 cycles. A defects libraries of the face‐centered cubic and hexagonal close‐packed crystal catalysts (FH‐NPs) were synthesized by introducing chlorine in graphdiyne. Such defect‐rich structures, low CN, and tensile strain tailoring methods have opened up a new way for the catalytic reaction of MOR.

Lattice distortion of PtCo nanoparticles encapsulated in TiO2 nanotubes boosts methanol oxidation

Exploring highly efficient, CO-tolerant and stability catalyst, such as Pt-based bimetallic catalyst for methanol oxidation reaction (MOR) is pressingly demanded towards commercialization of direct methanol fuel cells (DMFCs). Herein, the PtCo nanoparticles are encapsulated in bamboo-like highly ordered TiO2 nanotubes (PtCo/TNTs/Ti) by a facile electrochemical method. The obtained PtCo/TNTs/Ti electrode exhibits a large electrochemical active area of 1220.4 cm2/mgpt. Its mass activity reaches to 1148 mA/mgPt, which is 3.6 times and 7.5 times than that of Pt/TNTs/Ti and PtC, respectively. The lattice spacing of (111) and (200) faces are respectively reduced by 3.5% and 7.1%, caused by Co incorporated into Pt lattice. The lattice strain is an important reason for improving catalytic performance. In addition, an insight into growth mechanism is proposed according to the first-principle calculations. Co atoms that alloyed with Pt on the surface provide active sites for the following reduction of Pt, promoting the deposition efficiency. The obtained PtCo/TNTs/Ti is expected as the candidate electrode to output high power density in DMFCs.

Constructing a CrCoNi medium entropy alloy coordinated Pt ultrathin film as durable electrocatalysts for methanol oxidation reaction

As high-efficiency anode methanol oxidation catalysts, platinum-based materials have always occupied a dominant place since the inception of direct methanol fuel cells (DMFCs). However, because of the strong adsorption of intermediates, Pt-active centers are easily poisoned and induce serious activity loss. Here, we investigate the same commonality of the oxygen evolution reaction (OER) and methanol oxidation reaction (MOR) mechanism in Pt/CrCoNi complex catalysts and establish a relationship between them to help screen appropriate synergistic materials and reduce activity loss. With this strategy, the OER activity of Pt/CrCoNi is modified via temperature and oxygen pressure control, and the OER overpotential and MOR durability show a positive correlation. The MOR performance of the final optimized Pt/CrCoNi (7.5–225 Torr oxygen pressure and 400 °C annealing, OA) film reaches an advanced level in the Pt-based MOR catalysts and shows a mass activity of 3785 A gPt-1, as well as a good durability of 50000 s in the alkaline solution.

In-situ Raman unveiled Nb-O-bond-dependency selectivity for methanol electro-oxidation at high current density

Selective methanol oxidation reaction (MOR) to value-added formate can maximize the energy utilization by replacing the high onset-potential and sluggish oxygen evolution reaction. However, to date, only first-row 3d transition metal oxides exhibit the capacity of selective MOR, motivating the design of new kinds of electrocatalysts to further enhance the performance. Here we develop amorphous Nb2O5 as an efficient electrocatalyst, for the first time, for selective MOR to formate, with a low operating potential of 1.47 V vs. RHE to achieve the industry-relevant current densities (>100 mA cm−2) with a formate Faradaic efficiency of ∼100 %. We demonstrate, via operando Raman measurements, that this superior electrochemical MOR capacity originates from the in-situ induced short Nb-O bonds from the amorphous structure. Besides, the interface between amorphous Nb2O5 and nickel foam could also faciltate the MOR. This work may provide insights for designing novel transition metal oxides as efficient catalysts for selective MOR.

Facile synthesis of RuCoOx/N-CNT@PEDOT-SH/Pt for high catalytic performance of the methanol electro-oxidation

The exploration of direct methanol fuel cell (DMFC) catalysts has always been a great challenge. We present a facile method to prepare RuCoOx/N-CNT, composited with PEDOT-SH and supported Pt nanoparticles (Pt NPs) as catalyst for methanol oxidation reaction (MOR). Bimetallic oxide carbon nanotubes (RuCoOx/N-CNT) serve as a carrier and a cocatalyst, especially the introduction of RuOx into CoOx can also generate a large number of oxygen vacancies, which can be used as highly active centers as reactants to provide adsorption (or coordination) sites, facilitating electron transfer between reactants and improving the hydrophilicity of catalysts, thereby promoting redox reaction kinetics. A series of structural characterizations show that alloying and charge redistribution exist in RuCoOx/[email protected]/Pt, and oxygen vacancies can effectively change the electronic structure and improve the exposure of active sites density, thereby enhancing MOR activity. Performance tests such as CV、i-t、stability test show that the electrocatalytic activity of RuCoOx/[email protected]/Pt (2003.3 mA mg-1Pt) is far superior to that of RuCoOx/N-CNT/Pt (1324.8 mA mg-1Pt) and commercial Pt/C (279.6 mA mg-1Pt) catalysts. This strategy can provide a scheme for high-performance, low-cost anode catalyst design in MOR.

Ni/NiO heterojunction anchored on N-doped carbon for the enhanced methanol oxidation

The reasonable construction of an economical catalyst with excellent performance for methanol oxidation reaction (MOR) is one of the key problems to be solved to enhance the efficiency of direct methanol fuel cells (DMFC). Herein, Ni/NiO heterojunction loaded on N-doped carbon substrates (Ni/NiO@NC-T) have been constructed by pyrolyzing metal-organic polymer hydrogel formed by the reaction of Ni2+ and sodium alginate (SA), in which the strong interaction between Ni2+ and SA ensures the nickel content of the as-synthesized samples. The optimum Ni/NiO@NC-300 sample has an excellent activity for MOR with the current density (j) of 225 mA∙cm−2 at 1.6 V under an alkaline medium, which is higher than those of some MOR catalysts previously reported. In addition, the stability and anti-CO poisoning ability of Ni/NiO@NC-300 catalysts are superior to that of Pt/C, which indicates that Ni/NiO@NC-300 has potential application prospect as an MOR catalyst. By density functional theory (DFT) calculation, the superior performance of Ni/NiO@NC-300 is mainly ascribed to the Ni/NiO heterojunction, which can effectively reduce the energy barrier of the rate-determining step (CO* → COOH*) in the MOR process. The work opens a new route for the synthesis of transition metal-based materials as MOR catalysts.

High-performance Mo2C/MWCNT electrocatalyst for MOR: Comparison with MoO2/MWCNT and MoO3/MWCNT

Methanol oxidation reaction (MOR) in the direct methanol fuel cells involves six electron transfer processes, and noble metal based catalysts such as Pt and Pd are still recognized as efficient catalysts for MOR. It is generally accepted that the reaction is mainly related to the d states of precious metal-based catalysts. Transition metal carbides and noble metals exhibit similar d band structure and catalytic properties, among which molybdenum carbide is an effective catalyst. However, molybdenum carbide-based catalysts have not been used in methanol electrooxidation reactions until the present moment, and we tried to use Mo2C/MWCNT for the MOR reaction. Compared with MoO2/MWCNT and MoO3/MWCNT, it is found that Mo2C/MWCNT shows the highest electrocatalytic activity, and the current density of Mo2C/MWCNT is 185 mA cm−2 in 1 M KOH+1 M CH3OH at 0.70 V (vs. Hg/HgO). The current density is about 2.2 times and 1.4 times higher than those of MoO2/MWCNT and MoO3/MWCNT catalysts, respectively, and the electrochemical impedance also decreases markedly. The current density retains 76.19% of the initial catalytic activity after 10 h at the Mo2C/MWCNT electrode, indicating that the catalyst has superior stability for MOR. The reaction pathway of MOR on Mo2C/MWCNT is as follows: CH3OH∗ → CH3O∗→ CH2O∗ → CH2OOH∗ → CH2OO∗ → CHOO∗ → CO2∗. The result not only expands the Mo2C application area, but also provides a new idea for the design of the MOR catalyst.

Enhanced methanol oxidation activity of porous layered Ni/CeO2@CN nanocomposites in alkaline medium

The performance of direct methanol fuel cells (DMFC) partly depends on the development of economical and efficient methanol oxidation catalyst. Here, porous layered Ni/CeO2@CN-T composites were prepared by complexation and pyrolysis two-step methods. The optimal Ni/CeO2@CN-600 for methanol oxidation reaction (MOR) requires only 1.361 V at the current density (j) of 10 mA cm−2, and the j is as high as 229.56 mA cm−2 at 1.642 V, superior to those of the nickel-based catalysts reported. The excellent properties of Ni/CeO2@CN-600 are mainly attributed to the electronic interaction between Ni and CeO2, the uniform dispersion of Ni and CeO2 nanoparticles and its porous layered structure. Meanwhile, it has better stability after 12 h i-t tests. The CO poisoning experiments showed that the anti-CO poisoning ability of Ni/CeO2@CN-600 was obviously stronger than that of Pt/C catalyst in alkaline medium. Finally, the density functional theory (DFT) calculation shows the superior activity of Ni/CeO2 catalysts for MOR is mainly attributed to the higher adsorption energy of Ni/CeO2 for CH3OH and the lower energy barrier.

Production of Pt decorated poly(3,4‐ethylenedioxythiophene)/ERGO/GCEas an efficient catalyst for methanol oxidation reaction

AbstractIn this study, Pt‐decorated poly(3,4‐ethylenedioxythiophene) (PEDOT) electrocatalyst was uniformly coated electrochemically reduced graphene oxide (ERGO) layer on glassy carbon electrode (GCE) has been created using appropriate procedures to facilitate the implementation of the methanol oxidation reaction (MOR). This multi‐layer catalyst was characterized in each production step via Fourier transform infrared spectroscopy (FTIR), Raman spectroscopy, field‐emission scanning electron microscopy and energy‐dispersive x‐ray analysis (FESEM‐EDX) morphological analysis beside the electrochemical tests. The favorable structures of both ERGO and PEDOT increase conductivity and electrocatalytic activity toward methanol oxidation, which may create a suitable matrix for Pt loading thanks to the formation of much more active centers for methanol electrooxidation. The results demonstrate that the electrochemical surface area (ECSA) of Pt/PEDOT/ERGO/GCE was 39.1 m2 g−1, and it has a convenient mass activity (MA with 467 mA mg Pt−1) compared to that of commercial Pt/C. According to chronoamperometric analysis, the current density of Pt/PEDOT/ERGO/GCE was stable during the 1200 s of operation. It demonstrated remarkable stability with a final current density of 4.36 mA cm−2.