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

Hydrogen evolution by a photoelectrochemical cell based on a Cu2O-ZnO-[FeFe] hydrogenase electrode
Tian, Lei et al. (2018), Journal of Photochemistry and Photobiology A: Chemistry, vol. 366, 27-33
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Oriented Films of Conjugated 2D Covalent Organic Frameworks as Photocathodes for Water Splitting
Sick, Torben et al. (2018), Journal of the American Chemical Society, vol. 140, 2085-2092
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Photoelectrochemical hydrogen production from water splitting using heterostructured nanowire arrays of B⁠…
Salomão, Pedro E.A. et al. (2019), Solar Energy Materials and Solar Cells, vol. 194, 276-284
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Heteroepitaxy of GaP on silicon for efficient and cost-effective photoelectrochemical water splitting
Alqahtani, Mahdi et al. (2019), Journal of Materials Chemistry A, vol. 7, 8550-8558
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A molecular tandem cell for efficient solar water splitting
Wang, Degao et al. (2020), Proceedings of the National Academy of Sciences of the United States of America, vol. 117, 13256-13260
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Ru nanoparticles supported on alginate-derived graphene as hybrid electrodes for the hydrogen evolution reaction
Mallón, Laura et al. (2022), New Journal of Chemistry, vol. 46, 49-56
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