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H2 Water splitting_1400x600
Hydrogen and oxygen microsensors for direct and real-time detection of dissolved gas in photocatalytic/electrochemical studies

Water splitting studies

Hydrogen evolved from light-driven water splitting at the surface of a semiconductor material

Jonathan Kampmann and coworkers from the University of Munich have used a Unisense H2-NP low range microsensor to detect the nanomolar concentrations of hydrogen evolved from light-driven water splitting at the surface of a semiconductor material. They used a covalent organic framework (COF) as photoelectrode and the material was held at a potential of 0.4 V versus a reversible hydrogen electrode.  During light illumination, the generated charge reduced water in the cuvette and hydrogen was produced and detected continuously with the H2 microsensor (Figure 1).

H2 Water splitting fig. 1_1400x800

Hydrogen production upon illumination of a polymer dot catalyst

Dr. Haining Tian and his research group from Uppsala University have been investigating the potential of organic semiconducting polymer dots (Pdots) to serve as a photocatalyst in light-driven hydrogen production from water splitting. In the experiment the researchers used a H2-NP low range sensor with a detection limit of 50 nM to pierce through the lid of a cuvette and then measure the hydrogen evolution in an aqueous solution containing Pdots (Figure 2). The researchers showed that the Pdots worked very well as photocatalysts for light-driven water splitting.

H2 Water splitting fig. 2a+b_1400x800

Related publications

02
Oriented Films of Conjugated 2D Covalent Organic Frameworks as Photocathodes for Water Splitting
Sick, Torben et all (2018), Journal of the American Chemical Society, vol. 140, 2085-2092
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02
A Dye-Sensitized Photoelectrochemical Tandem Cell for Light Driven Hydrogen Production from Water
Sherman, Benjamin D. et all (2016), Journal of the American Chemical Society, vol. 138, 16745-16753
Read more

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