Stability of carbon with atomic hydrogen?

This isn't strictly a LENR-related discussion. You might have read that Rossi now apparently uses graphene in his QuarkX. Whether true or not, I somehow suspected that in an atmosphere of hot atomic hydrogen, which would be quite reactive, this would lead to the formation of various hydrocarbons (CH4, C2H2, etc), so I started researching the subject. According to some sources (not many so far) while this is definitely the case at low to medium temperatures (at least with graphite) it seems that above roughly 1000-1200°K hydrocarbon formation is strongly slowed or inhibited.

Some sources:

http://www.sciencedirect.com/s…22311582903026?via%3Dihub

http://pubs.acs.org/doi/abs/10.1021/j100725a028

http://aip.scitation.org/doi/abs/10.1063/1.431559

So my question is: does anybody have information or other sources contradicting what I seem to understand here?

I have other reasons for thinking that it could be used inside, not necessarily focusing on Rossi's case. The question wasn't really about him, but more about how the material behaves in general in a hydrogen atmosphere - possibly in atomic form - at high temperature.

I also found this. Perhaps it was just a matter of temperature range, which the initial paper didn't fully explore:

http://dx.doi.org/10.1063/1.431274

By the way, one of the reasons why I asked this question is that apparently when metals are supported on high surface area carbon like activated carbon (usually deposited from a metal salt solution) hydrogen uptake can exceed that of the carbon support and the metal by several times in a sort of synergistic effect. This is apparently due to hydrogen atoms migrating easily on the carbon support and it's known in the literature as hydrogen spillover - although the actual mechanism is disputed as far as I know (example). As the effect occurs with atomic hydrogen dissociated at the metal sites and activated carbon can withstand rather high temperatures at least in inert atmospheres without significantly getting altered, I thought it could have some uses in typical "dry" LENR experiments. There doesn't seem to be much information available on the high temperature exposure to hydrogen of so-prepared catalysts however.

http://www.iaea.org/inis/colle…ublic/37/064/37064827.pdf

http://www.spq.pt/magazines/RPQ/290/article/896/pdf

etc.

Do you think your carbon grains are getting loaded with Pb in your electrolytic experiments while also getting activated? I'm not sure how Pb and Pd are close cousins except maybe for their chemical symbol, though.

Alan, I checked more than twice on different websites and I keep seeing them in different columns and rows:

https://en.wikipedia.org/wiki/Periodic_table

http://www.ptable.com/

http://periodic.lanl.gov/index.shtml

I'll add more on the subject of Catalytic Carbon on the dedicated thread.

From some of the very recently released documents from Rossi-IH's case (e.g. 207-02 and 207-14) Rossi claims that at some point he moved from platinum sponge-based catalyst onto a graphene-based catalyst, so the underlying idea of this thread might have not been totally off track.

Interestingly, from a long list of unpublished patent applications (presumably from Rossi's IP package) featured in document 207-29 one called "Nickel graphite catalizer" appears to exist.