Synthesis and Structure of a Two-Dimensional Palladium Oxide Network on Reduced Graphene Oxide

Zhiyong Zheng, Huili Cao, Jie Meng, Yong Xiao, Jens Ulstrup, Jingdong Zhang, Feng Zhao*, Christian Engelbrekt*, Xinxin Xiao*

*Corresponding author for this work

Research output: Contribution to journalLetterpeer-review

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Abstract

New nanostructures often reflect new and exciting properties. Here, we present an two-dimensional, hitherto unreported PdO square network with lateral dimensions up to hundreds of nanometers growing on reduced graphene oxide (rGO), forming a hybrid nanofilm. An intermediate state of dissolved Pd(0) in the bacterium S. oneidensis MR-1 is pivotal in the biosynthesis and inspires an abiotic synthesis. The PdO network shows a lattice spacing of 0.5 nm and a thickness of 1.8 nm on both sides of an rGO layer and is proposed to be cubic or tetragonal crystal, as confirmed by structural simulations. A 2D silver oxide analog with a similar structure is also obtained using an analogous abiotic synthesis. Our study thus opens a simple route to a whole new class of 2D metal oxides on rGO as promising candidates for graphene superlattices with unexplored properties and potential applications for example in electronics, sensing, and energy conversion.
Original languageEnglish
JournalNano Letters
Volume22
Issue number12
Pages (from-to)4854-4860
Number of pages7
ISSN1530-6984
DOIs
Publication statusPublished - 2022

Keywords

  • Superlattice
  • S. oneidensis MR-1
  • Biosynthesis
  • Palladium oxide
  • Graphene

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