Description:
<p>Oxygen surface exchange and diffusion in Pr<sub>1.75</sub>Sr<sub>0.25</sub>Ni<sub>0.75</sub>Co<sub>0.25</sub>O<sub>4±δ</sub> have been investigated using two methods: pulsed isotope exchange (PIE) and oxygen isotope exchange with gas phase equilibration (IE GPE).</p>