Citation: Hirakawa, T.; Tokuzumi, .W; Shimokawa, Y.; Sato, T.; Yoshida, H.; Ohyama, J.; Machida, M. (2020). Comparative study of structure-catalytic activity relationship for Ni-Cr-Al-O and Cu-Ni-Cr-Al-O spinel oxide soloid solutions. Journal of the Ceramic Society of Japan, 128, pp. 906-911.