Outcome：

2023
The frictional properties of conductive reduced graphene oxide were studied at an nano level. We found that the reduction decreases the oxygen functional groups, which in turn decreases the frictional force.

2022
In this research article, we report a method to fabricate conducting reduced graphene oxide (rGO) monolayer films reduced by methane plasma treatment within few minutes and the nanoscale characterization of local conductivity via conductive atomic force microscopy (C-AFM), realizing their applicability in highly transparent conducting electrodes.

An electrochemical cell for infrared spectroscopy is desined and combined with a commercial infrared spectrometer to directly observe adsorbates on an electrode catalysts under various potential during the reaction.

Outcome：

2023
Graphite electrodes loaded with Ag nanoparticles were characterized for the electrolytic reduction reaction of carbon dioxide. Electrochemical AFM analysis revealed that the adsorption force between the graphite substrate and Ag particles is weakened by the hydrogen evolution reaction, with a side reaction of the carbon dioxide reduction reaction, resulting in desorption and aggregation of the Ag nanoparticles supported on the electrode.

2022
An electrochemical infrared spectroscopy cell was fabricated and combined with an infrared spectrometer to measure the adsorption behavior of water molecules on a water electrolysis catalyst using an attenuated total reflection setup. The adsorption behavior of water molecules is depended on the support materials of catalysts.

To develop Ag-modified electrocatalysts for the production of carbon monoxide by the electrochemical reduction of carbon dioxide, we elucidate the effects of Ag particle size and support conditions on the catalytic activity and durability to establish a synthesis method for highly active electrocatalysts.

Outcome：

2022
Ag nanoparticles deposited on graphite electrodes were characterized for the electrochemical reduction reaction of carbon dioxide. The hydrogen evolution reaction, a side reaction of the carbon dioxide reduction reaction, causes desorption and aggregation of the Ag nanoparticles on the electrode.

A novel electrode material for Li-ion capacitors (LICs) with high capacity and fast charge-discharge response is fabricated by using vertically aligned carbon nanotubes (CNTs) grown directly on a substrate electrode (carbon, Al or Cu) and its performance is evaluated. The CNTs-modified electrodes are synthesized by alcohol catalyzed chemical vapor deposition (AC-CVD). The performance of the CNT-modified electrodes are evaluated in aqueous solution or organic solvent.

Outcome：

2022
To improve the charge-discharge capacity of vertically aligned carbon nanotube-modified electrodes, a multi-step synthesis method was developed to increase CNT growth length. The multi-step synthesis method provided 3 times longer CNTs, and the capacity was improved on the electrode modified with these CNTs.

For the development of polymer electrolyte water electrolyzer (PEWE), the synthesis of an anode catalyst with low overvoltage and high stability are important. We aim to develop iridium oxide and its alloy nanoparticle catalysts uniformly dispersed and supported on a highly conductive nanocarbon material.

Outcome：

2022
Catalyts performance of IrO2 supported on B- and N-doped graphene was evaluated in a polymer electrolyte water electrolyzer. We clarified that IrO2/BN-doped graphene has high activity and durablity for the oxygen evolution reaction (OER).

To develop new anode electrocatalysts with highly active and selectivefor direct-type fuel cells using hydrogen carrier molecules (quinones, and glucose), the control of the elements of the nanoparticles, the size and surface structure of the catalyst, and the support material are important. We will develop and evaluate non-metallic catalysts suitable for hydrogen carrier molecules with aromatic ring structure.

Outcome：

2022
The oxidation behavior of quinones used in direct-type fuel cells were evaluated on heteroatom-doped graphene catalysts. Boron-doped graphene has enhanced the catalytic activity for quinon-ased fuels