10.1021/acsami.9b04471.s002 Bihang Zhou Bihang Zhou Jia-jia Zheng Jia-jia Zheng Jingui Duan Jingui Duan Chunchao Hou Chunchao Hou Yang Wang Yang Wang Wanqin Jin Wanqin Jin Qiang Xu Qiang Xu Chemically Robust, Cu-based Porous Coordination Polymer Nanosheets for Efficient Hydrogen Evolution: Experimental and Theoretical Studies American Chemical Society 2019 PCP nanosheets Efficient Hydrogen Evolution electrocatalytic hydrogen evolution top-down integral strategy site Cu-based Porous Coordination Polymer Nanosheets 2019-05-15 00:00:00 Dataset https://acs.figshare.com/articles/dataset/Chemically_Robust_Cu-based_Porous_Coordination_Polymer_Nanosheets_for_Efficient_Hydrogen_Evolution_Experimental_and_Theoretical_Studies/8193392 Due to the extremely high number of accessible active sites and short diffusion path, porous coordination polymer (PCP) nanosheets have demonstrated a variety of promising applications, especially for energy conversion and mass transfer. However, the development of chemically stable PCP nanosheets with dense active sites and large lateral size is a great challenge in terms of feasible considerations. Herein, we first designed and prepared a kind of chemically stable PCP nanosheets via a bottom-up and a top-down integral strategy. Featuring densely exposed and periodic Cu<sup>2+</sup> active sites (2.1 × 10<sup>6</sup> per μm<sup>2</sup>), as well as ultrathin nature (5 nm) and significant pores (18 Å), this nanosheet demonstrated remarkable performance of electrocatalytic hydrogen evolution. Furthermore, one plausible process and the effect of Cu<sup>2+</sup> active sites were proposed and validated by density functional theory calculations.