Journal
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
Volume 120, Issue 12, Pages -Publisher
NATL ACAD SCIENCES
DOI: 10.1073/pnas.2300481120
Keywords
graphene; 2D materials; catalysis; hydrogen dissociation; proton transport
Categories
Funding
- European Research Council
- Graphene Flagship Core3 Project
- Engineering and Physical Sciences Research Council
- Lloyd's Register Foundation
- [786532]
- [EP/S030719]
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Defect-free monolayer graphene shows unexpected catalytic activity in splitting molecular hydrogen, attributed to surface nanoripples. This finding may have implications for other chemical reactions involving graphene and is important for two-dimensional materials in general.
Graphite is one of the most chemically inert materials. Its elementary constituent, monolayer graphene, is generally expected to inherit most of the parent material's properties including chemical inertness. Here, we show that, unlike graphite, defect-free monolayer graphene exhibits a strong activity with respect to splitting molecular hydrogen, which is comparable to that of metallic and other known catalysts for this reaction. We attribute the unexpected catalytic activity to surface corrugations (nanoscale ripples), a conclusion supported by theory. Nanoripples are likely to play a role in other chemical reactions involving graphene and, because nanorippling is inherent to atomically thin crystals, can be important for two-dimensional (2D) materials in general.
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