You will have nanoamount of H2 from a nanoelectrode, which is not quantifiable.

Thanks, Yurli. Any suggestions to improve the H2 yielding rate?

Increase the electrode surface area, make your reactor head-space as small as possible and then you can use GC with TCD and Ar as a carrier gas.

Hi Yuril,

Thanks. could you recommend a latest review for this topic, i.e., semiconductors for water splitting? 

Anming,

It's not clear what do you mean: "splitting water with semiconducting photocatalysis"

Photoelectrochemical? With a sacrificial reagent? What is your system?  Semiconductors are not  the catalysts. They are mostly used for charge separation.

yes. photoelectrochemical reaction with a sacrificial reagent, like solar water splitting.

We are working on water oxidation in photoelectrochemical systems. In these systems you do not need a sacrificial reagent because you apply a bias potential and form both H2 and O2. The detection of H2 and O2 are extremely difficult, especially H2.

I have some basic ideas how to detect H2.

For O2 detection, see DOI: 10.1021/jp500589n 

One of the recent review; DOI: 10.1039/C3CS60425J

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