Publication detail

Palladium Nanocubes with {100} Facets for Hydrogen Evolution Reaction: Synthesis, Experiment and Theory

Saldan, I. Moumaneix, L. Umer, M. Pavlinak, D. Rihova, M. Kolibalova, E. Petrus, J. Kallio, T. Vandichel, M. Macak, JM.

Original Title

Palladium Nanocubes with {100} Facets for Hydrogen Evolution Reaction: Synthesis, Experiment and Theory

Type

journal article in Web of Science

Language

English

Original Abstract

Spatially separated palladium nanocubes (Pd NCs) terminated by {100} facets are synthesized using direct micelles approach. The stepwise seed-mediated growth of Pd NCs is applied for the first time. The resulting Pd NCs are thoroughly characterized by HR-TEM, XPS, Raman, ATR-FTIR, TGA, and STEM-EDX spectroscopies. Some traces of residual stabilizer (polyvinylpyrrolidone, PVP) attached to the vertices of Pd NCs are identified after the necessary separation-washing procedure, however, it is vital to avoid aggregation of the NCs. Pd NCs are subsequently and uniformly loaded on Vulcan carbon (approximate to 20 wt.%) for the electrochemical hydrogen cycling. By post-mortem characterizations, it is revealed that their shape and size remained very stable after all electrochemical experiments. However, a strong effect of the NCs size on their hydrogen interaction is revealed. Hydrogen absorption capacity, measured as the H:Pd ratio, ranges from 0.28 to 0.48, while hydrogen evolution and oxidation reactions (HER and HOR) kinetics decrease from 15.5 to 4.6 mA.mg Pd-1 between approximate to 15 and 34 nm of Pd NCs, respectively. Theoretical calculations further reveal that adsorption of H atoms and their penetration into the Pd lattice tailors the NCs electronic structure, which in turn controls the kinetics of HER, experimentally observed by the electrochemical tests. This work may pave the way to the design of highly active electrocatalysts for efficient HER stable for a long reactive time. In particular, obtained results might be transferred to active Pd-alloy-based NCs terminated by {100} facets.

Keywords

colloidal synthesis; hydrogen adsorption; nanocubes; palladium; reaction mechanism; surface analysis

Authors

Saldan, I.; Moumaneix, L.; Umer, M.; Pavlinak, D.; Rihova, M.; Kolibalova, E.; Petrus, J.; Kallio, T.; Vandichel, M.; Macak, JM.

Released

1. 3. 2025

Publisher

WILEY-V C H VERLAG GMBH

Location

WEINHEIM

ISBN

1613-6829

Periodical

Small

Year of study

21

Number

11

State

Federal Republic of Germany

Pages count

12

URL

https://onlinelibrary.wiley.com/doi/10.1002/smll.202408788

BibTex

@article{BUT197905,
  author="Ivan {Saldan} and David {Pavliňák} and Eva {Kolíbalová} and Josef {Petruš} and Jan {Macák} and Martina {Říhová} and Lilian {Moumaneix} and Muhammad {Umer} and Tanja {Kallio} and Matthias {Vandichel}",
  title="Palladium Nanocubes with {100} Facets for Hydrogen Evolution Reaction: Synthesis, Experiment and Theory",
  journal="Small",
  year="2025",
  volume="21",
  number="11",
  pages="12",
  doi="10.1002/smll.202408788",
  issn="1613-6829",
  url="https://onlinelibrary.wiley.com/doi/10.1002/smll.202408788"
}