Monte Carlo simulations of surface segregation to discover new hydrogen separation membranes

Jelmer I. Postma*, Alberto Ferrari, Amarante J. Böttger

*Corresponding author for this work

Research output: Contribution to journalArticleScientificpeer-review

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Surface compositions play a predominant role in the efficiency and lifetime of membranes and catalysts. The surface composition can change during operation due to segregation, thus controlling and predicting the surface composition is essential. Computational modelling can aid in predicting alloy stability, along with designing surface alloys and near-surface alloys that can outperform existing materials. In this work, a computational model to predict surface segregation in ternary alloys is developed. The model, based on Miedema's semi-empirical model and Monte Carlo simulations, enables to predict long- and short-range ordering in the surface and subsurface layers. It is used to screen a vast range of alloy compositions to design a novel ternary Pd-based material for H2 separation membranes. The addition of specific amounts of Cu and Zr to Pd is expected to reduce poisoning and enhance the permeability as compared to pure Pd.

Original languageEnglish
Pages (from-to)2221-2230
JournalInternational Journal of Hydrogen Energy
Issue number6
Publication statusPublished - 2023


  • High throughput
  • Hydrogen separation
  • Miedema's model
  • Monte Carlo
  • Palladium
  • Ternary alloys


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