Is CoSi2 Sensitive to Hydrogen?

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SUMMARY

The discussion centers on the sensitivity of cobalt disilicide (CoSi2) to hydrogen, particularly in comparison to palladium (Pd), which is known for its high sensitivity. A paper referenced (Appl. Phys. Lett. 91, 181910 (2007)) highlights the use of a Pd-based sensor for hydrogen detection. Participants in the forum express curiosity about CoSi2's potential as a hydrogen sensor, noting that the diffusion rates of hydrogen through materials depend on their crystal structure and atomic radii. The consensus suggests that the smaller atomic sizes of cobalt and silicon may influence hydrogen diffusion rates through CoSi2.

PREREQUISITES
  • Understanding of hydrogen diffusion mechanisms in solid materials
  • Familiarity with crystal structures and atomic radii
  • Knowledge of sensor technology, particularly in relation to hydrogen detection
  • Basic principles of material science, specifically regarding CoSi2
NEXT STEPS
  • Research the hydrogen diffusion rates in CoSi2 and compare them to Pd and Pt
  • Investigate the properties and applications of CoSi2 in sensor technology
  • Explore the crystal structure of CoSi2 and its implications for gas sensing
  • Review literature on the use of Pd-based sensors for hydrogen detection
USEFUL FOR

Material scientists, sensor technology developers, and researchers interested in hydrogen detection methods will benefit from this discussion.

shinobi20
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TL;DR
I would like to know if cobalt disilicide (CoSi2) is sensitive to hydrogen in the context of CoSi2 acting as a sensor. In addition, I would like to know if there are any resources that I can look into to get more information about this.
I was reading a paper [Appl. Phys. Lett. 91, 181910 (2007)] that has fabricated a Palladium (Pd) based sensor for hydrogen. One of the key points is that it is known that Pd is quite sensitive to hydrogen which is why the paper utilized a Pd array that may act as a sensor for detecting hydrogen concentrations.

I'm not an expert, so I would like to ask the community if anyone knows if cobalt disilicide (CoSi2) is also sensitive to hydrogen. I have searched the web for some resources or any claim about this but I have no luck as of now. In addition, can anyone point me to anything that might be of help? Thanks!
 
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Why have you chosen CoSi2 as a candidate?

Pd (137 pm), and Pt (139 pm), are large atoms. H2 can diffuse through the solid material. Diffusion rates will depend on crystal structure.

Co (125 pm), is smaller, with Si (111 pm), being smaller again. The mix of different radii elements in a crystal, tends to reduce the gaps, so I would expect Si to reduce the flow. What diffusion rate would you expect for H2 through a CoSi2 lattice?
 
Baluncore said:
Why have you chosen CoSi2 as a candidate?

Pd (137 pm), and Pt (139 pm), are large atoms. H2 can diffuse through the solid material. Diffusion rates will depend on crystal structure.

Co (125 pm), is smaller, with Si (111 pm), being smaller again. The mix of different radii elements in a crystal, tends to reduce the gaps, so I would expect Si to reduce the flow. What diffusion rate would you expect for H2 through a CoSi2 lattice?
It is currently the material that I'm studying, and I got curious whether it can act as a hydrogen sensor. As for the diffusion rate, I'm not yet sure, that is why I'm gathering resources in order to investigate further.
 

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