Selective adsorption of atomic deuterium on BN thin film

Koswattage, K.; Shimoyama, Iwao   ; Baba, Yuji  ; Sekiguchi, Tetsuhiro  ; Nakagawa, Kazumichi*

Boron nitride (BN) nanotubes (BNNTs) have attracted much research attention as a promising candidate for hydrogen storage. One of the most basic arguments is the site dependence of atomic hydrogen adsorption. In this work, we investigated the site dependence of atomic deuterium adsorption on a thin film of BN as a representative system for BN nanomaterials, using NEXAFS and XPS. A BN thin. The XPS spectrum of B 1s showed a prominent shoulder on the low binding energy side of the main peak after deuteration, while the N 1s spectrum showed only peak broadening at the high binding energy side. In the PSID measurements, it was observed that there was a clear resonance peak at the B site but no resonance at the N site. The experimental results of NEXAFS and XPS were analyzed by the DV-X method with core-hole effect. Finally, we conclude that deuterium (hydrogen) atoms are preferentially adsorbed on the B sites of BN materials, via a single hydrogen adsorption model.