Nature of the Active Sites and Reaction Mechanism during Methanol Steam Reforming over Cu/ZnO: An Isotopic Modulated Excitation Diffuse Reflectance Infrared Fourier Transform Spectroscopy Study - Didi Li; Runfa Qiu; Benjamin M. Moskowitz; Zhaocong Jiang; Haoyuan Gu; Qihang Wen; Israel E. Wachs; Minghui Zhu (Journal of the American Chemical Society, 2025)