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![image of a portion of an intensity chart](/sites/default/files/styles/person_thumbnail/public/2022-06/pipoxs_crop.jpg?itok=_CUyFpvO)
Intermediate Valence State in YbB4 Revealed by Resonant X-ray Emission Spectroscopy
CHEXS users have directly observed an electronic configuration that is quantum mechanically mixed between the Yb2+ and Yb3+ valence states in the material YbB4. These observations confirm an “intermediate valence” conjecture for this material, which was first hypothesized 50 years ago.
![image of the PIPOXS beamline](/sites/default/files/styles/person_thumbnail/public/2022-03/picture1.png?itok=K75zpZEt)
Nonprecious transition metal nitrides as efficient oxygen reduction electrocatalysts for alkaline fuel cells
CHEXS users have discovered a class of nonprecious metal derivatives that can catalyze fuel cell reactions about as well as platinum, at a fraction of the cost.