CO Oxidation NEB Help - Jobs won't converge
Posted: Tue Feb 20, 2018 3:39 am
Hi all,
I'm really desperate because my hours expire in March.
I am trying to test out the CO oxidation reaction, which is enhanced by a single atom catalyst - Pt adsorbed on single-vacancy graphene. Basically, I want to emulate the results in the following paper: http://pubs.rsc.org/-/content/articlepd ... c2cp41441d (see Figure 5b)
However, about after a month, I'm still struggling to get this reaction to occur.
- One issue is that the job still hasn't finished even though it's been running for multiple days.
- Another issue is that despite starting with inputs such that the transition state should be one of the middle images, it keeps getting pushed to either the first/second image or the last/second-to-last one. I actually turned off LCLIMB with the latest attempt because I read that I can turn this parameter on when I am closer to reaching convergence, but I've had this set to .TRUE. for the first 48 hrs of the job...
- Sometimes an atom will move in a wacky way and the energy of one image will suddenly jump 10 eV... I keep having to stop it when one of the images goes wrong, and restart the job entirely.
I tried to simplify this reaction and just look CO + O2 --> CO2 + O. This reaction was also taking forever, so I coarsened the job by using Selective Dynamics and fixing the XYZ of both oxygen atoms int he O2 molecule, but this has still been running for 25 hrs, and the end doesn't seem to be in sight. I'm just so frustrated...
If it makes a difference, I'm running on XSEDE Stampede 2. I am also a little bit confused about the job submission (I submit with the file 'test.job') because it seems different to me than the original Stampede...
I'm attaching all relevant files. I'd really appreciate any help I can get on the matter.
Thanks,
CSW
I'm really desperate because my hours expire in March.
I am trying to test out the CO oxidation reaction, which is enhanced by a single atom catalyst - Pt adsorbed on single-vacancy graphene. Basically, I want to emulate the results in the following paper: http://pubs.rsc.org/-/content/articlepd ... c2cp41441d (see Figure 5b)
However, about after a month, I'm still struggling to get this reaction to occur.
- One issue is that the job still hasn't finished even though it's been running for multiple days.
- Another issue is that despite starting with inputs such that the transition state should be one of the middle images, it keeps getting pushed to either the first/second image or the last/second-to-last one. I actually turned off LCLIMB with the latest attempt because I read that I can turn this parameter on when I am closer to reaching convergence, but I've had this set to .TRUE. for the first 48 hrs of the job...
- Sometimes an atom will move in a wacky way and the energy of one image will suddenly jump 10 eV... I keep having to stop it when one of the images goes wrong, and restart the job entirely.
I tried to simplify this reaction and just look CO + O2 --> CO2 + O. This reaction was also taking forever, so I coarsened the job by using Selective Dynamics and fixing the XYZ of both oxygen atoms int he O2 molecule, but this has still been running for 25 hrs, and the end doesn't seem to be in sight. I'm just so frustrated...
If it makes a difference, I'm running on XSEDE Stampede 2. I am also a little bit confused about the job submission (I submit with the file 'test.job') because it seems different to me than the original Stampede...
I'm attaching all relevant files. I'd really appreciate any help I can get on the matter.
Thanks,
CSW