Fig. 5: 13C CP MAS NMR spectra of ZnOZn-H-Zn samples ((ZnO-300-vac)-SW−200-vac) after exposing to CO2 (1000 mbar) at different temperatures.
From: Active bridging hydride species in ZnO nanorods originated from hydroxyl and oxygen vacancy

Recycle delays of 5 s were used, and 2000 acquisitions were accumulated for all the spectra.