Proton-Coupled Electron Transfer in the Catalytic Hydrogenation of Hydroxyacetone: A pH-Induced Switch from Potential Pinning to Kinetic Coupling - Yaxin Shi; Xiaomin Wang; Menglong Sun; Zhijian Li; Yu Sun; Shihe Lin; Yijun Yang; Xi Wang; Zhiqin Liang (Journal of the American Chemical Society, 2026)