Efficient electro-oxidation of methanol using PtCo nanocatalysts supported reduced graphene oxide matrix as anode for DMFC

Baronia, Richa; Goel, Jyoti; Tiwari, Shraddha; Singh, Priti; Singh, Dinesh; Singh, Surinder P.; Singhal, Sunil

doi:10.1016/j.ijhydene.2017.03.011

Cited by 93 publications

(41 citation statements)

References 35 publications

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“…3,4 However, low kinetic constants for the methanol oxidation reaction (MOR), scarcity of noble metals and noble catalysts being poisoned by intermediate products have hampered the large-scale commercial application of DMFCs. 5,6 The invention of a new electrocatalyst is an effective strategy to solve this issue. Besides, Pt-based catalysts are widely used as MOR electrocatalysts.…”

Section: Introductionmentioning

confidence: 99%

One-step synthesis of Pt based electrocatalysts encapsulated by polyoxometalate for methanol oxidation

et al. 2018

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Section: Introductionmentioning

confidence: 99%

One-step synthesis of Pt based electrocatalysts encapsulated by polyoxometalate for methanol oxidation

et al. 2018

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“…23 Although bimetallic PtRu exhibits much higher catalytic activity in the MOR compared with pure Pt, the high cost of Pt and Ru remains a disadvantage. Thus, research is focused on alloying with other transition metals that are more inexpensive, such as PtCo, 24 PtMo, 25 PtNi 26 and PtFe. 27 In 2018, Eshghi et al 28 showed that PtFe alloys on a graphene support showed extremely high current density, tolerance for CO poisoning and high durability for methanol electro-oxidation compared with that of commercial Pt/C.…”

Section: Introductionmentioning

confidence: 99%

The potential of novel carbon nanocages as a carbon support for an enhanced methanol electro‐oxidation reaction in a direct methanol fuel cell

et al. 2020

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In this study, we introduce the potential for a new catalyst support, namely, carbon nanocages (CNCs) for anodic direct methanol fuel cell (DMFC). The synthesis, characterization and catalytic activities of four electrocatalysts, PtRu/CNC, PtNi/CNC, PtFe/CNC and PtCo/CNC, have been investigated. These electrocatalysts are synthesized using pyrolysis, followed by a microwave-assisted ethylene glycol reduction method. From X-ray diffraction analysis, PtNi/CNC and PtRu/CNC showed the smallest crystallite particle size of Pt-alloy, which corresponded to the (111) plane. The Raman spectra confirmed the presence of the carbon support material in all prepared electrocatalysts. The ratio value of the D band and G band (I D /I G) of all prepared samples was not much different within the electrocatalyst and CNC. The I D /I G values calculated for the CNC, PtNi/CNC, PtRu/CNC, PtCo/CNC and PtFe/ CNC electrocatalysts were 0.90, 0.89, 0.83, 0.78 and 0.77, respectively. Therefore, the number of defects of graphitization in increasing order (I D /I G) was PtFe/CNC < PtCo/CNC < PtRu/CNC < PtNi/CNC < CNC. Brunauer-Emmett-Teller analysis revealed that the CNC support has a mesoporous-type structure with a high surface area of 416 m 2 g −1 , which indicates that this support has a high potential to act as an excellent catalyst support. From the cyclic voltammetry curve, PtRu/CNC showed the highest catalytic activity in methanol electro-oxidation and reached a value of 427 mA mg −1 , followed by PtNi/ CNC (384.11 mA mg −1), PtCo/CNC (150.53 mA mg −1) and PtFe/CNC (144.11 mA mg −1). PtFe/CNC exhibited a higher ratio value of I f /I b (3.24) compared with PtRu/CNC (2.34), PtNi/CNC (1.43) and PtCo/CNC (1.62). These values show that the combination of Pt and Fe catalysts in PtFe/CNC had better CO tolerance than PtRu/CNC, PtNi/CNC and PtCo/CNC electrocatalysts. The higher performance of PtRu/CNC was attributed to the fact that it had the smallest bimetallic-Pt crystallite; there was a smooth distribution of bimetallic-Pt on its CNC support, as shown by field emission scanning electron microscopy; it had the highest electrochemical surface area value (16.23 m 2 g −1); and

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“…Pt catalysts have been extensively studied due to their superior performance as heterogeneous catalysts in numerous processes. For instance, Pt-based nanostructures exhibit high catalytic activity toward methanol oxidation [19,20]. Especially, Qin and co-workers [21] have recently identified that Pt is considerably more active and stable during the catalytic decomposition of H 2 O 2 than catalase.…”

Section: Introductionmentioning

confidence: 99%

Catalase-like nanosystem for interlocking trimodal cancer therapy with hypoxia relief

Luo

Cong

et al. 2020

Sci. China Mater.

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Efficient electro-oxidation of methanol using PtCo nanocatalysts supported reduced graphene oxide matrix as anode for DMFC

Cited by 93 publications

References 35 publications

One-step synthesis of Pt based electrocatalysts encapsulated by polyoxometalate for methanol oxidation

One-step synthesis of Pt based electrocatalysts encapsulated by polyoxometalate for methanol oxidation

The potential of novel carbon nanocages as a carbon support for an enhanced methanol electro‐oxidation reaction in a direct methanol fuel cell

Catalase-like nanosystem for interlocking trimodal cancer therapy with hypoxia relief

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