Synthesis and characterization of Pt-H MoO3 catalysts for CO-tolerant PEMFCs

Kurdin, Kirill A.; Kuznetsov, V. V.; Синицын, В. В.; Galitskaya, Elena; Филатова, Е. В.; Belina, Charles A.; Stevenson, Keith J.

doi:10.1016/j.cattod.2020.07.079

Cited by 9 publications

(4 citation statements)

References 53 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Analyzing the results of Pt-based electrocatalysts supported on alternative materials in a similar way (Figure 11b), it can be seen that the most negative CO oxidation potentials are exhibited by electrocatalysts, including Ru, either in the deposited metal NPs [143,147] or in the supporting material [141]. Most of the other electrocatalysts deal with Pt NPs supported on Mo or W oxides and carbides [130,142,145]. In this case, the CO oxidation potentials are considerably shifted to more negative values compared to Pt/C, although are still more positive than PtRu/C.…”

Section: Discussionmentioning

confidence: 83%

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

Molochas

Tsiakaras

2021

Catalysts

View full text Add to dashboard Cite

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.

show abstract

Section: Discussionmentioning

confidence: 83%

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

Molochas

Tsiakaras

2021

Catalysts

View full text Add to dashboard Cite

show abstract

“…• MoOx (Kurdin et al, 2022;Ioroi et al, 2002;Wang et al, 2001;Zhang et al, 1999), • WO3 (Tian et al, 2021;Brkovic et al, 2020;Antolini, 2007;Shen et al, 1995), • NbOx (Ueda et al, 2003), • TaOx (Gao et al, 2019;Ueda et al, 2003), • SnOx (Dubau et al, 2020;Spasov et al, 2019;Jiménez-Morales et al, 2019;Matsui et al, 2006), • PbOx (Suffredini et al, 2007), • RuO2 (Lee et al, 2021a;Eguiluz et al, 2010), • RhO2 (Eguiluz et al, 2010), • IrO2 (Ahn et al, 2022;Moore et al, 2019).…”

Section: Binary Alloys Of Pt and Metals Other Than Ruunclassified

Carbon Monoxide-Resistant Anode Catalysts for Single-Cell Direct Carbon Monoxide Fuel Cells: Binary, Ternary, And Quaternary Platinum Alloys as Anode Electrocatalysts

Zabihian,

Davari,

Osei-Prempeh

2023

IJRER

View full text Add to dashboard Cite

The objective of this paper is to present the results of experimentations on the custom-made anode electrocatalysts for direct carbon monoxide fuel cells (DCMFCs) inspired by catalysts commonly used for direct alcohol fuel cells. Seven different catalysts were fabricated and tested. The uniform and consistent manufacturing process and the test procedure allowed a meaningful comparison of the developed fuel cells. The results indicated that homemade Pt-Ru membrane-electrode assembly (MEA) could not compete with the Pt-Sn MEA. While the performance of the MEAs with Pt-Ru-Ni, Pt-Ru-Sn-Ni, and Pt-Ru-Sn-Co was not satisfactory, the Pt-Ru-Sn-Co-W MEA achieved the best performance among all MEAs with Nafion® 117 membrane. The last MEA was made of the Pt-Sn anode catalyst and Nafion® 212 membrane and outperformed all other MEAs by a wide margin. The experiments demonstrated that the performance of the best-developed MEA was three times better than the performance of the commercial Pt-Ru MEA. This means the performance of DCMFCs can be significantly improved by developing a suitable anode electrocatalyst, using a thinner membrane, and operating at optimum conditions. These results are not only applicable for DCMFCs but also are very useful for other proton exchange membrane fuel cells (PEMFCs) operating with CO-containing fuels.

show abstract

“…Transition metal polyoxometalates are used as catalytically active materials in synthetic processes and are promising in the field of hydrogen energy. , The polyoxorhenate discovered is likely to find application in the field of organic catalysis in olefin metathesis reactions or other similar processes. The fact of the formation of complex rhenium polyoxometalates and the absence of such for technetium under the specified conditions can be used for a highly specialized process for separating rhenium and technetium from each other.…”

Section: Introductionmentioning

confidence: 99%

Intramolecular Re···O Nonvalent Interactions as a Stabilizer of the Polyoxorhenate(VII)

Volkov,

Novikov,

Borisova

et al. 2023

Inorg. Chem.

View full text Add to dashboard Cite

The first polyoxorhenate(VII) compound, pyrazolium polyoxorhenate ((C4N2H5)2Re4O15), and two new rhenium(VII) and technetium(VII) salts have been synthesized and studied. The structure of Tc2O7 has been reinvestigated. The [Re4O15]2– polyoxoanion contains four Re(VII) atoms: one with an octahedral environment and three with a tetrahedral environment. Polyoxorhenate is formed in the presence of a buffering agent, pyrazole, the latter maintaining pH = 2.5 during the formation of crystals. The [Re4O15]2– polyoxoanion has novel stoichiometry and the cis-conformation, likely due to the stabilizing intramolecular nonvalence interactions. For the first time, intramolecular interactions of the Re···O, Re···μ-O, and O···O are described (previously known were only intermolecular ones). In all of the compounds, intermolecular Re···O interactions are observed, which, however, in other compounds, do not lead to the formation of polyoxometalates. The Hirshfeld surface analysis showed that the main contribution to intermolecular interactions is made by the O···H/H···O contacts, van der Waals interactions of the H···H for cations, and the O···O for anions. DFT calculations of the [Re4O15]2– geometry, compared with the crystallographic data, revealed a deviation in the angles. Mass spectroscopy of the red polyoxometalate [Tc20O68]4– was carried out for the first time. Comparison of the results of MALDI and LI for the first known polyoxometalates of the manganese subgroup made it possible to find general patterns of oligomerization for rhenium and technetium compounds. The ESI-MS and LI-MS methods applied to solution and crystals Re compounds made it possible to prove rhenium being able to form not only [Re4O15]2– but also heavier polyoxoanions.

show abstract

Synthesis and characterization of Pt-H MoO3 catalysts for CO-tolerant PEMFCs

Cited by 9 publications

References 53 publications

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

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

Carbon Monoxide-Resistant Anode Catalysts for Single-Cell Direct Carbon Monoxide Fuel Cells: Binary, Ternary, And Quaternary Platinum Alloys as Anode Electrocatalysts

Intramolecular Re···O Nonvalent Interactions as a Stabilizer of the Polyoxorhenate(VII)

Contact Info

Product

Resources

About