Fig. 4: Helicene SAM and effect on the OER activity. | Nature Communications

Fig. 4: Helicene SAM and effect on the OER activity.

From: Enhancement of electrocatalytic oxygen evolution by chiral molecular functionalization of hybrid 2D electrodes

Fig. 4

a An STM image of SAM of (P)-thiadiazole-[7]helicene (image size: 30 nm × 30 nm, tunneling current: 25 pA, sample bias: −5 mV). The dashed square marks three trimers of the molecules. A high-resolution image (image size: 4 nm × 4 nm, tunneling current: 20 pA, sample bias: 20 mV) showing three trimers is in the inset. b An STM image of SAM of (M)-bis(thiadiazole)-[8]helicene on Au(111) (image size: 30 nm × 30 nm, tunneling current: 20 pA, sample bias: 25 mV). The dashed rectangle marks two dimers of the molecules. The inset shows a high-resolution image (image size: 3 nm × 4 nm, tunneling current: 20 pA, sample bias: −25 mV) of two dimers. The 3D models of the molecules show the locations of the molecules. c Chiral molecule effect on the OER activity of NiOx islands dependent on the catalyst-chiral molecule-Au substrate configuration and illustration of the chiral molecular spin polarization effect on the OER.

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