Enhanced electrocatalytic performance for methanol oxidation of Pt nanoparticles on Mn3O4-modified multi-walled carbon nanotubes

Yang, Yuting; Wang, Xueyun; Zhang, Guoqiang; Zheng, Junpeng; Liu, Xianzong; Shu, Chunying; Li, Jiang; Wang, Chunru

doi:10.1016/j.ijhydene.2012.04.153

Cited by 61 publications

(31 citation statements)

References 50 publications

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“…%, respectively, according to ICP-MS analysis, whereas the measured Pt content of PtRu/C was almost double compared to the other two catalysts. Moreover, the presence of a high amount of manganese oxides on the surface of Pt/C-MnxO1+x (see previous discussion on XPS and μRS) could result in a low electrical conductivity of the electrode [13,33,34]. CO stripping voltammetries are shown in Figure 6.…”

Section: Electro-chemical Characterizationmentioning

confidence: 96%

“…It enhances the catalytic behavior of Pt for the ORR by substituting for oxygen as an electron-acceptor in the case of oxygen starvation [40]. Furthermore, based on studies on Pt/Mn3O4-MWCNT [33], the Mn3O4 leads to uniform and small Pt nanoparticle deposition, with enhanced CO-tolerance and excellent stability in methanol oxidation. In fact, Mn3O4 nanoparticles promote the dissociation of coordinated water and further oxidize COads to release more Pt active sites [33].…”

Section: Electro-chemical Characterizationmentioning

confidence: 99%

“…Furthermore, based on studies on Pt/Mn3O4-MWCNT [33], the Mn3O4 leads to uniform and small Pt nanoparticle deposition, with enhanced CO-tolerance and excellent stability in methanol oxidation. In fact, Mn3O4 nanoparticles promote the dissociation of coordinated water and further oxidize COads to release more Pt active sites [33]. The hydrous Mn3O4 would use its inherent Mn3O4-OH bonds to directly donate the hydroxide species to the Pt sites and oxidize the adsorbed CO species [41].…”

Section: Electro-chemical Characterizationmentioning

confidence: 99%

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The Use of C-MnO2 as Hybrid Precursor Support for a Pt/C-MnxO1+x Catalyst with Enhanced Activity for the Methanol Oxidation Reaction (MOR)

et al. 2015

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Platinum (Pt) nanoparticles are deposited on a hybrid support (C-MnO2) according to a polyol method. The home-made catalyst, resulted as Pt/C-MnxO1+x, is compared with two different commercial platinum based materials (Pt/C and PtRu/C). The synthesized catalyst is characterized by means of FESEM, XRD, ICP-MS, XPS and μRS analyses. MnO2 is synthesized and deposited over a commercial grade of carbon (Vulcan XC72) by facile reduction of potassium permanganate in acidic solution. Pt nanoparticles are synthesized on the hybrid support by a polyol thermal assisted method (microwave irradiation), followed by an annealing at 600 °C. The obtained catalyst displays a support constituted by a mixture of manganese oxides (Mn2O3 and Mn3O4) with a Pt loading of 19 wt. %. The electro-catalytic activity towards MOR is assessed by RDE in acid conditions (0.5 M H2SO4), evaluating the ability to oxidize methanol in 1 M concentration. The synthesized Pt/C-MnxO1+x catalyst shows good activity as well as good stability compared to the commercial Pt/C based catalyst.

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Section: Electro-chemical Characterizationmentioning

confidence: 96%

Section: Electro-chemical Characterizationmentioning

confidence: 99%

Section: Electro-chemical Characterizationmentioning

confidence: 99%

See 1 more Smart Citation

The Use of C-MnO2 as Hybrid Precursor Support for a Pt/C-MnxO1+x Catalyst with Enhanced Activity for the Methanol Oxidation Reaction (MOR)

et al. 2015

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“…The ratio of the forward anodic peak current density to the reverse anodic peak current density (I f /I b ) can be used to describe the catalyst tolerance to carbonaceous species accumulation [16,[22][23]. We assigned the ratio of I f /I b as k. The current density at the peak potential was taken as one main parameter of the activity of the electrocatalysts for MOR [24].…”

Section: For Methanol Electro-oxidationmentioning

confidence: 99%

“…For example, Takahashi et al [15] found that the electrocatalytic activity of Pt-CeO 2 /carbon black (CB) for MOR and its performance as anodo was superior to commercially available Pt-Ru/C materials. Yang et al [16] found that Pt nanoparticles on Mn 3 O 4 -modified MWCNTs showed excellent electrocatalytic properties and excellent stability toward to MOR, implying that metal oxides can play a key role in enhancing MOR.…”

Section: Introductionmentioning

confidence: 99%

Substitute of Expensive Pt with Improved Electrocatalytic Performance and Higher Resistance to CO Poisoning for Methanol Oxidation: the Case of Synergistic Pt-Co3O4 Nanocomposite

Zhao

Zheng

et al. 2013

Nano-Micro Lett.

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Abstract:In this paper, Pt-Co3O4 nanocomposite was synthesized by a sol-gel process combined with electrodeposition method. Its electrocatalytic activity towards methanol oxidation was investigated at room temperature using cyclic voltammetry (CV), electrochemical impedance spectroscopy (EIS) and current densitytime curve. It is found that the resultant Pt-Co3O4 catalysts with minute amount of Pt exhibite attractive electrocatalytic activity for methanol oxidation reaction (MOR) but with a high resistance CO poisoning due to the synergistic effects from Pt and Co3O4. Together with the low manufacturing cost of Co3O4, the reported nanostructured Pt-Co3O4 catalyst is expected to be a promising electrode material for direct methanol fuel cells (DMFC).

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Asymmetrical Promotional Effect in the Disorder‐to‐Order Transition of Au‐Pt‐Cu Ternary Alloy Electrocatalysts

Zhao,

Hu,

et al. 2024

Adv Funct Materials

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Binary alloys of platinum (Pt) are well‐studied to address the poor poisoning resistance of Pt. Among them, the ordered alloys, also known as intermetallics, tend to show exceptional advantages in activity and durability. In contrast, the medium and high‐entropy Pt alloy systems, with three or more elements, have been reported with better performance but not fully understood, due to the complex relationship of elemental miscibility. Herein a unique asymmetric synergistic effect in the ordering process of a series of ternary alloy AuxPt1‐xCu3 (x = 0‐1) is reported. The volcano plot of ordering degree (OD) in AuxPt1‐xCu3 (x = 0‐1) shows its peak in the Au‐rich samples but gradually shifts to Au/Pt equal molar ratio with the increasing temperature. Based on formation energy calculation and molecular dynamics analysis, the unique ordering trend of ternary alloys and the shift of OD peak position are rationalized. Among the studied samples, Au0.4Pt0.6Cu3‐350 sample exhibits the highest mass activity in electrocatalytic ethanol oxidation (3.58 A·mgAu+Pt−1), 4.4 times higher than that of commercial Pt/C. This work not only explores the unique asymmetrical effect in the OD of ternary intermetallics, but also helps to understand the complex inter‐metallic relationship in the medium‐entropy and high‐entropy alloys.

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Enhanced electrocatalytic performance for methanol oxidation of Pt nanoparticles on Mn3O4-modified multi-walled carbon nanotubes

Cited by 61 publications

References 50 publications

The Use of C-MnO2 as Hybrid Precursor Support for a Pt/C-MnxO1+x Catalyst with Enhanced Activity for the Methanol Oxidation Reaction (MOR)

The Use of C-MnO2 as Hybrid Precursor Support for a Pt/C-MnxO1+x Catalyst with Enhanced Activity for the Methanol Oxidation Reaction (MOR)

Substitute of Expensive Pt with Improved Electrocatalytic Performance and Higher Resistance to CO Poisoning for Methanol Oxidation: the Case of Synergistic Pt-Co3O4 Nanocomposite

Asymmetrical Promotional Effect in the Disorder‐to‐Order Transition of Au‐Pt‐Cu Ternary Alloy Electrocatalysts

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