Synergistic effects of mixing and strain in high entropy spinel oxides for oxygen evolution reaction oleh Jihyun Baek, Md Delowar Hossain, Pinaki Mukherjee, Junghwa Lee, Kirsten T. Winther, Juyoung Leem, Yue Jiang, William C. Chueh, Michal Bajdich, Xiaolin Zheng