Unveiling the sensitivity and significance of the Ni oxidation state for alkaline hydrogen oxidation electrocatalysis - Qihao Li; Zixiao Shi; Colin R. Bundschu; Christopher J. Pollock; Andrés Molina Villarino; Mihail R. Krumov; Rui Zeng; David A. Muller; Héctor D. Abruña (Proceedings of the National Academy of Sciences, 2026)