(31) J. Chen, G. Liu, Y.-Z. Zhu, M. Su, P. Yin, X.-J. Wu, Q. Lu, C. Tan, M. Zhao, Z. Liu, W. Yang, H. Li, G.-H. Nam, L. Zhang, Z. Chen, X. Huang, P. M. Radjenovic, W. Huang, Z.-Q. Tian, J.-F. Li, Hua Zhang, Ag@MoS2 Core–Shell Heterostructure as SERS Platform to Reveal the Hydrogen Evolution Active Sites of Single-Layer MoS2, J. Am. Chem. Soc. 2020, 142, 7161−7167.