Extended Data Fig. 4: FTIR spectrum of LiBH4@30Ni sample with different solvothermal time.
From: Room-temperature hydrogen storage of boron nanoclusters

To investigate the solvothermal synthesis process, the products after heating 1, 2, 4, 6 and 12 h were collected and characterized. The B-H vibrations in FTIR spectrum appeared after 4 h indicating the appearance of LiBH4.