Detail publikace

Top-Down Synthesis of Nanostructured Platinum−Lanthanide Alloy Oxygen Reduction Reaction Catalysts: PtxPr/C as an Example

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"
}