The catalyst demonstrated hydrogen production several times higher than that of conventional photocatalysts.

Photocatalysis, in which sunlight breaks down water molecules to produce hydrogen, offers a sustainable route to clean energy. 

Janus structures are an emerging class of nanomaterials that can potentially boost photocatalysis. Named after the Roman two-faced god Janus, these nanomaterials have opposing sides with distinct physical and chemical properties.

Interactions between the two faces facilitate the movement of light-generated charges, a critical step in splitting water to produce hydrogen.

A research team headed by Asst Prof Edison Ang of the National Institute of Education at NTU has designed a novel Janus photocatalyst with enhanced photocatalytic activity.

The new catalyst has contrasting sides: a nitrogen-rich rough side that resembles a honeycomb and a carbon-rich smooth side made up of ultrathin nanosheets.

This dual-faced design demonstrates superior hydrogen generation – around five to fourteen times higher than that of conventional photocatalysts.

Source:  Fuel Cells Works