The effect of functionalised multi-walled carbon nanotubes in the hydrogen electrooxidation reaction in reactive currents impurified with CO

Cid, Ricardo Escudero; Varela, Ana Sofía; Hernández-Fernández, P.; Fatás, Enrique; Ocón, P.

doi:10.1016/j.ijhydene.2014.01.083

Cited by 13 publications

(6 citation statements)

References 46 publications

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“…It can also be seen that, the current continues increasing sharply up to 0.1 V and 0.2 V for the Pd x Rh y /C, Rh/C and pure Pd/C, respectively. At more positive potentials, transition into the region of hydrogen mass transport controlled current densities starts at approximately 0.15 V. As it was expected, the limiting current increases with the increment of the rotational speed of the electrode [53]. Moreover, the electrochemical behavior of the as prepared Pd x Rh y electrocatalysts is similar to that of pure Rh.…”

Section: Hydrogen Oxidation Reaction Kineticssupporting

confidence: 68%

Electrocatalytic activity of Vulcan-XC-72 supported Pd, Rh and Pd Rh toward HOR and ORR

Tzorbatzoglou

Brouzgou

Tsiakaras

2015

Applied Catalysis B: Environmental

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Section: Hydrogen Oxidation Reaction Kineticssupporting

confidence: 68%

Electrocatalytic activity of Vulcan-XC-72 supported Pd, Rh and Pd Rh toward HOR and ORR

Tzorbatzoglou

Brouzgou

Tsiakaras

2015

Applied Catalysis B: Environmental

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“…Carbon black, carbon nanotubes (CNTs) and graphene nanosheets (GNs), which are three most widely used carbon-based nanomaterials, have been compared as catalysts upports;G Ns are proven to be superior. [28][29][30] Recently,X ing et al reported that the Pt activity for methanol and CO oxidation could be enhanced by increasing the degree of oxidation of CNT supports; [31] this verified the promising potentialo fm odifyingt he performance of catalysts through facile engineering of the support properties.…”

Section: Introductionmentioning

confidence: 89%

“…In addition to these strategies, it has been demonstrated that the properties of carbon supports, including functional groups (FGs), defects, and graphitic crystallinity, could modify the antipoisoning performances. Carbon black, carbon nanotubes (CNTs) and graphene nanosheets (GNs), which are three most widely used carbon‐based nanomaterials, have been compared as catalyst supports; GNs are proven to be superior . Recently, Xing et al.…”

Section: Introductionmentioning

confidence: 99%

Antipoisoning Performance of Platinum Catalysts with Varying Carbon Nanotube Properties: Electrochemically Revealing the Importance of Defects

et al. 2016

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To understand the role of functional groups (FGs) and defects in improving the antipoisoning performance of platinum catalysts for formate oxidation, four kinds of supports originating from carbon nanotubes (CNTs) with varying amounts of FGs and varying degrees of defects are discussed. Platinum particles with controlled similarity are deposited onto the four supports to precisely compare the differences between the four supports. The catalysts structures are characterized by XRD, high‐resolution TEM, Raman spectroscopy, and XPS. The electrochemical performances of the four catalysts are characterized by cyclic voltammetry and chronoamperometry methods. The results show that the use of fully unzipped CNTs, with a higher degree of defects and lower amount of FGs, as a support results in the greatest improvement in antipoisoning performance of platinum, relative to oxidized CNTs with a higher amount of FGs and lower degree of defects. These results indicate that CNT defects play a greater role in promoting the antipoisoning performance of supported catalysts than FGs. These results are helpful to guide the design of supports to improve the antipoisoning performance of formate oxidation catalysts.

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“…The authors suggested that the Pt-N bonds facilitate the formation and subsequent dissociation of oxygenated species on the catalyst surface; thus, CO oxidation is facilitated through the bifunctional mechanism. In their next study [122], where catalysts supported on N-doped and undoped GNPs were compared, they also presumed that strong binding between Pt and N causes an energy decrease in the d-state of Pt, resulting in a weakened CO adsorption. Furthermore, N-GNP supported anodes presented higher stability than PtRu/C after aging tests for 5000 cycles (Figure 9d).…”

Section: Advanced Carbonaceous Supportsmentioning

confidence: 99%

Carbon Monoxide Tolerant Pt-Based Electrocatalysts for H2-PEMFC Applications: Current Progress and Challenges

Molochas

Tsiakaras

2021

Catalysts

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The activity degradation of hydrogen-fed proton exchange membrane fuel cells (H2-PEMFCs) in the presence of even trace amounts of carbon monoxide (CO) in the H2 fuel is among the major drawbacks currently hindering their commercialization. Although significant progress has been made, the development of a practical anode electrocatalyst with both high CO tolerance and stability has still not occurred. Currently, efforts are being devoted to Pt-based electrocatalysts, including (i) alloys developed via novel synthesis methods, (ii) Pt combinations with metal oxides, (iii) core–shell structures, and (iv) surface-modified Pt/C catalysts. Additionally, the prospect of substituting the conventional carbon black support with advanced carbonaceous materials or metal oxides and carbides has been widely explored. In the present review, we provide a brief introduction to the fundamental aspects of CO tolerance, followed by a comprehensive presentation and thorough discussion of the recent strategies applied to enhance the CO tolerance and stability of anode electrocatalysts. The aim is to determine the progress made so far, highlight the most promising state-of-the-art CO-tolerant electrocatalysts, and identify the contributions of the novel strategies and the future challenges.

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The effect of functionalised multi-walled carbon nanotubes in the hydrogen electrooxidation reaction in reactive currents impurified with CO

Cited by 13 publications

References 46 publications

Electrocatalytic activity of Vulcan-XC-72 supported Pd, Rh and Pd Rh toward HOR and ORR

Electrocatalytic activity of Vulcan-XC-72 supported Pd, Rh and Pd Rh toward HOR and ORR

Antipoisoning Performance of Platinum Catalysts with Varying Carbon Nanotube Properties: Electrochemically Revealing the Importance of Defects

Carbon Monoxide Tolerant Pt-Based Electrocatalysts for H2-PEMFC Applications: Current Progress and Challenges

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