M
Marc Heggen
Researcher at Ernst Ruska Centre
Publications - 207
Citations - 9500
Marc Heggen is an academic researcher from Ernst Ruska Centre. The author has contributed to research in topics: Catalysis & Nanoparticle. The author has an hindex of 40, co-authored 185 publications receiving 7075 citations. Previous affiliations of Marc Heggen include Forschungszentrum Jülich.
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Compositional segregation in shaped Pt alloy nanoparticles and their structural behaviour during electrocatalysis
TL;DR: The segregation and leaching mechanisms revealed here highlight the complexity with which shape-selective nanoalloys form and evolve under reactive conditions.
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Octahedral PtNi nanoparticle catalysts: exceptional oxygen reduction activity by tuning the alloy particle surface composition.
TL;DR: It is demonstrated how shape selectivity and optimized surface composition result in exceptional oxygen reduction activity of octahedral PtNi nanoparticles (NPs) by utilizing a facile, completely surfactant-free solvothermal synthesis.
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A unique oxygen ligand environment facilitates water oxidation in hole-doped IrNiOx core–shell electrocatalysts
Hong Nhan Nong,Hong Nhan Nong,Tobias Reier,Hyung Suk Oh,Manuel Gliech,Paul Paciok,Thu Ha Thi Vu,Detre Teschner,Detre Teschner,Marc Heggen,Valeri Petkov,Robert Schlögl,Travis E. Jones,Peter Strasser,Peter Strasser +14 more
TL;DR: In this paper, the local geometric ligand environment and electronic metal states of oxygen-coordinated iridium centres in nickel-leached IrNi@IrOx metal oxide core-shell nanoparticles under catalytic oxygen evolution conditions were investigated.
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Core-shell compositional fine structures of dealloyed Pt(x)Ni(1-x) nanoparticles and their impact on oxygen reduction catalysis.
TL;DR: It is discussed how these self-organized Ni-enriched inner shells play a key role in maintaining surface lattice strain and thus control the surface catalytic activity for oxygen reduction.
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Size-dependent morphology of dealloyed bimetallic catalysts: linking the nano to the macro scale
TL;DR: The size-morphology-composition relationships link the nano to the macro scale and provide an insight into the existing material gap of dealloyed nanoparticles and highly porous bulklike bimetallic particles in corrosion science.