Nitrogen-Tuned Cationic Au Sites on TiO 2 Enable Selective Methane Oxidation to Methanol - Quanguo Hao; Yueying Chu; Guodong Qi; Xu Li; Jingxian Cao; Ruochen Cao; Nan Zhang; Zhendong Wang; Yongfeng Hu; Qiang Wang; Jun Xu; Feng Deng (Journal of the American Chemical Society, 2026)