Production of intermediate carbon dioxide radials , hydrocarbons and so on.
Dear Jenaidullah Batur
Because, you didn't mention the CO2 reduction method type (heterogeneous or homogeneous), I will assume you are talking about thermal catalysis.
You can use FTIR spectroscopy, which will define intermediates as CO*, HCOO*, COOH*, HOCO* and others. Additionally, DRIFT spectroscopy can be used in the same way.
If you are using solid materials, you can apply In-situ X-Ray Absorption Spectroscopy and to measure CO2 adsorption and changes on metal surfaces.
Depending on your purpose, also there are other methods.
Yes, I am using heterogeneous catalysis. for now in situ X-Ray spectroscopy not available, can you please share other methods? thank you!
Steady-state isotopic transient kinetic analysis (SSITKA)
This allows you to clearly spot which species are mere spectators and which are actual intermediates
It depends on what kind of systems you're studying. For example, if you are working with heterogeneous catalysts and you're interested in studying the species formed on the surface of the catalyst, you can use Transmission FT-IR and DRIFT spectroscopy. If you are working with bifunctional catalyst, in case you can separate both the parts, you can also use SS-NMR, Raman, etc. These techniques cannot be used in operando conditions. Hydrocarbons can also be detected by GC during the reaction.
@opeyemi ojelade, I know DRIFT can answer the question regarding intermediates detection. But, I am Particularly interested in SSITKA that you mentioned. Comparing SSITKA and in-situ DRIFT, which of the two is more efficient or are there specific information that makes each of them superior? I am intrigued by your description of SSITKA (can detected inactive and active intermediate species). To ask further, is SSITKA performed using chemisorption equipment? You may want to share an article or two about this with me. Thank you. If you have the equipment in your lab, you could send me a picture please. My email address is [email protected]. Thank you.
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