• Corpus ID: 250626533

Observation of Structure Evolution and Reaction Intermediates at the Gate-tunable Suspended Graphene/Electrolyte Interface

  title={Observation of Structure Evolution and Reaction Intermediates at the Gate-tunable Suspended Graphene/Electrolyte Interface},
  author={Ying Xu and Youhe Ma and Feng Gu and Shanshan Yang and Chuan-Shan Tian Department of Physics and State Key Laboratory of Nuclear Physics and KeyLaboratoryfor Micro and Nano Photonic Structures and Fudan University and Collaborative Innovation Center of Advanced Microstructures},
: Graphene serves as an ideal platform to investigate the microscopic structure and reaction kinetics at the graphitic electrode interfaces. However, graphene is susceptible to various extrinsic factors, e.g. substrate, causing much confusion and controversy. Hereby we have obtained cm-sized substrate-free monolayer graphene suspended on electrolyte surface with gate tunability. Using sum-frequency spectroscopy, we have observed the structural evolution versus the gate voltage at the graphene… 
1 Citations

Figures from this paper

Surface-specific vibrational spectroscopy of interfacial water reveals large pH change near graphene electrode at low current densities

Molecular-level insight into interfacial water at buried electrode interfaces is essential in elucidating many phenomena of electrochemistry, but spectroscopic probing of the buried interfaces



Surface-Specific Spectroscopy of Water at a Potentiostatically Controlled Supported Graphene Monolayer

  • L. DreierZ. Liu M. Bonn
  • Chemistry, Physics
    The journal of physical chemistry. C, Nanomaterials and interfaces
  • 2019
This work uses sum-frequency generation spectroscopy to investigate the pH- and potential-dependence of the interfacial water structure in contact with a chemical vapor deposited (CVD) grown graphene surface and shows that there are water molecules between the graphene and the (hydrophilic) supporting substrate.

Vibrational spectroscopy at electrolyte/electrode interfaces with graphene gratings

It is shown that transparent graphene gratings electrode provide an attractive platform for vibrational spectroscopy at the electrolyte/electrode interfaces: infrared diffraction from graphene gratINGS offers enhanced detection sensitivity and interface specificity.

Insight on Structure of Water and Ice Next to Graphene Using Surface-Sensitive Spectroscopy.

Light is shed on water-graphene interactions relevant in optimizing the performance of graphene in various applications by using surface-sensitive infrared-visible sum frequency generation (SFG) spectroscopy to probe the interfacial water structure next to graphene supported on a sapphire substrate.

Origin of the Overpotential for the Oxygen Evolution Reaction on a Well-Defined Graphene Electrode Probed by in Situ Sum Frequency Generation Vibrational Spectroscopy.

The OER tends to reduce the electric conductivity between the Li2O2 and graphene by decreasing their contact area before a large part of the deposited Li2 O2 was oxidized, which elucidates the origin of the high overpotential for the OER.

Tunable angle-dependent electrochemistry at twisted bilayer graphene with moiré flat bands

Tailoring electron transfer dynamics across solid–liquid interfaces is fundamental to the interconversion of electrical and chemical energy. Stacking atomically thin layers with a small azimuthal

Aqueous proton transfer across single-layer graphene

Graphene supported on fused silica is subject to cycles of high and low pH, and it is shown that protons transfer reversibly from the aqueous phase through the graphene to the other side where they undergo acid–base chemistry with the silica hydroxyl groups.

Water Structure, Dynamics and Sum-frequency Generation Spectra at Electrified Graphene Interfaces.

It is shown that the value of the applied electrode potential has dramatic effects on the structure and dynamics of interfacial water molecules, and electrified graphene interfaces provide promising paradigm systems for comprehending both short- and long-range neighboring aqueous system impacts.

Asymmetric response of interfacial water to applied electric fields.

The observed deviation from the linear response for electric fields of about ±3 × 108 volts per metre calls into question the validity of treating interfacial water as a simple dielectric medium.

Graphene, related two-dimensional crystals, and hybrid systems for energy conversion and storage

Graphene and related two-dimensional crystals and hybrid systems showcase several key properties that can address emerging energy needs, in particular for the ever growing market of portable and wearable energy conversion and storage devices.

Electrochemical gate-controlled charge transport in graphene in ionic liquid and aqueous solution.

The electron transport behavior of electrochemically gated graphene transistors in different solutions is studied and the minimum conductivity displays an exponential decrease with the density of charged impurities, attributed to the impurity scattering of the carriers.