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Detail publikace
Fichtner, J. Garlyyev, B. Watzele, S. El-Sayed, HA. Schwammlein, JN. Li, WJ. Maillard, FM. Dubau, L. Michalicka, J. Macak, JM. Holleitner, A. Bandarenka, AS
Originální název
Top-Down Synthesis of Nanostructured Platinum−Lanthanide Alloy Oxygen Reduction Reaction Catalysts: PtxPr/C as an Example
Typ
článek v časopise ve Web of Science, Jimp
Jazyk
angličtina
Originální abstrakt
The oxygen reduction reaction (ORR) is of great interest for future sustainable energy conversion and storage, especially concerning fuel cell applications. The preparation of active, affordable, and scalable electrocatalysts and their application in fuel cell engines of hydrogen cars is a prominent step toward the reduction of air pollution, especially in urban areas. Alloying nanostructured Pt with lanthanides is a promising approach to enhance its catalytic ORR activity, whereby the development of a simple synthetic route turned out to be a nontrivial endeavor. Herein, for the first time, we present a successful single-step, scalable top-down synthetic route for Pt− lanthanide alloy nanoparticles, as witnessed by the example of Pr-alloyed Pt nanoparticles. The catalyst was characterized by high-resolution transmission electron microscopy, energy-dispersive X-ray spectroscopy, X-ray diffraction, and photoelectron spectroscopy, and its electrocatalytic oxygen reduction activity was investigated using a rotating disk electrode technique. PtxPr/C showed ∼3.5 times higher [1.96 mA/cm2 Pt, 0.9 V vs reversible hydrogen electrode (RHE)] specific activity and ∼1.7 times higher (0.7 A/mgPt, 0.9 V vs RHE) mass activity compared to commercial Pt/C catalysts. On the basis of previous findings and characterization of the PtxPr/C catalyst, the activity improvement over commercial Pt/C originates from a lattice strain introduced by the alloying process.
Klíčová slova
electrocatalysis, cathodic corrosion, fuel cell, oxygen reduction, lanthanides, platinum alloys, top-down synthesis
Autoři
Fichtner, J.; Garlyyev, B.; Watzele, S.; El-Sayed, HA.; Schwammlein, JN.; Li, WJ.; Maillard, FM.; Dubau, L.; Michalicka, J. ; Macak, JM. ; Holleitner, A.; Bandarenka, AS
Vydáno
6. 2. 2019
ISSN
1944-8252
Periodikum
ACS applied materials & interfaces
Ročník
11
Číslo
5
Stát
Spojené státy americké
Strany od
5129
Strany do
5135
Strany počet
7
URL
https://pubs.acs.org/doi/abs/10.1021/acsami.8b20174
BibTex
@article{BUT156493, author="Fichtner, J. and Garlyyev, B. and Watzele, S. and El-Sayed, HA. and Schwammlein, JN. and Li, WJ. and Maillard, FM. and Dubau, L. and Michalicka, J. and Macak, JM. and Holleitner, A. and Bandarenka, AS", title="Top-Down Synthesis of Nanostructured Platinum−Lanthanide Alloy Oxygen Reduction Reaction Catalysts: PtxPr/C as an Example", journal="ACS applied materials & interfaces", year="2019", volume="11", number="5", pages="5129--5135", doi="10.1021/acsami.8b20174", issn="1944-8252", url="https://pubs.acs.org/doi/abs/10.1021/acsami.8b20174" }