Hi All:
I have been experimenting on using "organic deposition method (OD)" and "aqueous deposition method (AD)" to deposit Cu onto Carbon nanotube sheet, the details of these two methods can be found in publication "the influence of Cu electrodeposition parameters on fabricating structurally uniform CNT-Cu composite wires", and the link of this publication is listed below:
https://www.sciencedirect.com/science/article/pii/S2352492817301678
OD is a very slow process and can deposit Cu particles with few microns in size, however, after the vacuum annealing process, Cu/CNT sample showed negligible/almost zero contribution to CO2 reduction, judging from the SEM images (attached in the file), I believed that prefect spherical shape provides very few active sites thus hindering the CO2 reduction, please correct me if this statement is not scientifically accurate.
Regarding the AD process, itself is very fast and difficult to control, most of the time we will end up with huge chunk of Cu platelets without any nanomorphologies, theoretically it will not be beneficial for the CO2 reduction.
Therefore I am seeking advices on the improvement of these two deposition methods as well as any suggestion on new deposition approaches, the end goal should be CNT with uniformly distributed nano/micron sized Cu particles with many active sites.
Thanks in advance
Dear Daniel,
The procedure that we normally use for the deposition of metallic nanoparticles is the reduction, in an aqueous medium, of a metal precursor, using sodium borohydride. This method (for metals such as Ag, Au, Pd, and others) works very well and generates quite homogeneous nanoparticles of few nanometers (depending on the experimental conditions). In my profile you can find some papers on hydrogen production or catalytic photodegradation, which have been based on this methodology to deposit metal nanoparticles.
Dear Daniel,
The procedure that we normally use for the deposition of metallic nanoparticles is the reduction, in an aqueous medium, of a metal precursor, using sodium borohydride. This method (for metals such as Ag, Au, Pd, and others) works very well and generates quite homogeneous nanoparticles of few nanometers (depending on the experimental conditions). In my profile you can find some papers on hydrogen production or catalytic photodegradation, which have been based on this methodology to deposit metal nanoparticles.
Dear Daniel Chen many thanks for sharing this very interesting technical question with the RG community. Our only experience in this field was the deposition of gold nanoparticles on graphene sheets many years ago. In the present issue it will be very helpful having a look at the following interesting review article:
Fabrication of Metal/Carbon Nanotube Composites by Electrochemical Deposition
This review has been published Open Access so that it is freely available as public full text on the internet (please see attached pdf file). It is also very recent (published October 2021) and contains 178 references to original research papers. I'm confident that this paper will provide you with a good overview of this field of research.
Good luck with your work and best wishes, Frank Edelmann
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