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Zinc-Coordination Polymer-Derived Porous Carbon-Supported Stable PtM Electrocatalysts for Methanol Oxidation Reaction
Luleå tekniska universitet, Institutionen för samhällsbyggnad och naturresurser, Kemiteknik. Catalysis and Nanomaterials Lab 27, Department of Chemistry, Quaid-i-Azam University, Islamabad 45320, Pakistan.ORCID-id: 0000-0002-7940-7297
Catalysis and Nanomaterials Lab 27, Department of Chemistry, Quaid-i-Azam University, Islamabad 45320, Pakistan.
Luleå tekniska universitet, Institutionen för samhällsbyggnad och naturresurser, Kemiteknik.ORCID-id: 0000-0003-3652-7798
Department of Chemistry, Faculty of Science, King Khalid University, P.O. Box 9004, Abha 61413, Saudi Arabia.
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2021 (Engelska)Ingår i: ACS Omega, E-ISSN 2470-1343, Vol. 6, nr 10, s. 6780-6790Artikel i tidskrift (Refereegranskat) Published
Abstract [en]

Porous carbon (PC) is obtained by carbonizing a zinc-coordination polymer (MOF-5) at 950 °C and PtM (M = Fe, Co, Ni, Cu, Zn) nanoparticles (NPs), which are deposited on PC using the polyol method. Structural and morphological characterizations of the synthesized materials are carried out by powder X-ray diffraction (PXRD), X-ray photoelectron spectroscopy (XPS), and high-resolution transmission electron microscopy (HRTEM), and the porosity was determined using a N2 adsorption/desorption technique. The results revealed that PtM NPs are alloyed in the fcc phase and are well dispersed on the surface of PC. The electrochemical results show that PtM/PC 950 catalysts have higher methanol oxidation reaction (MOR) performances than commercial Pt/C (20%) catalysts. After 3000 s of chronoamperometry (CA) test, the MOR performances decreased in the order of Pt1Cu1/PC 950 > Pt1Ni1/PC 950 > Pt1Fe1/PC 950 > Pt1Zn1/PC 950 > Pt1Co1/PC 950. The high MOR activities of the synthesized catalysts are attributed to the effect of M on methanol dissociative chemisorption and improved tolerance of Pt against CO poisoning. The high specific surface area and porosity of the carbon support have an additional effect in boosting the MOR activities. Screening of the first row transition metals (d5+n, n = 1, 2, 3, 4, 5) alloyed with Pt binary catalysts for MOR shows that Pt with d8 (Ni) and d9 (Cu) transition metals, in equivalent atomic ratios, are good anode catalysts for alcohol fuel cells.

 

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American Chemical Society (ACS), 2021. Vol. 6, nr 10, s. 6780-6790
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URN: urn:nbn:se:ltu:diva-83437DOI: 10.1021/acsomega.0c05843ISI: 000631101200029PubMedID: 33748591Scopus ID: 2-s2.0-85103384378OAI: oai:DiVA.org:ltu-83437DiVA, id: diva2:1540409
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Validerad;2021;Nivå 2;2021-03-29 (johcin);

Finansiär: Higher Education Commission (HEC) of Pakistan (8400/Federal/NRPU/R&D/HEC/2017), (21-2009/SRGP/R&D/HEC/2018). Research center of advanced materials, King Khalid University, Saudi Arabia, (RCAMS/KKU/0020/20)

Tillgänglig från: 2021-03-29 Skapad: 2021-03-29 Senast uppdaterad: 2021-12-13Bibliografiskt granskad

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Khan, InayatShah, Faiz Ullah

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