Wu Jun-Xi, Bag Partha Pratim, Xu Yan-Tong, Gong Li, He Chun-Ting, Chen Xiao-Ming, Zhang Jie-Peng
MOE Key Laboratory of Bioinorganic and Synthetic Chemistry, School of Chemistry, Sun Yat-Sen University, Guangzhou, 510275, P. R. China.
Instrumental Analysis and Research Center, Sun Yat-Sen University, Guangzhou, 510275, P. R. China.
Adv Mater. 2021 Jun;33(22):e2007368. doi: 10.1002/adma.202007368. Epub 2021 Apr 24.
Behaving as structural protectors and electronic modulators, catalyst supports such as graphene derivatives are generally constructed by covalent bonds. Here, hydrogen-bonded ultrathin nanosheets are reported as a new type of catalyst support. Melamine (M) and cyanuric acid (CA) molecules self-assemble to form the graphite-like hydrogen-bonded co-crystal M-CA, which can be easily exfoliated by ultrasonic treatment to yield ultrathin nanosheets with thickness of ≈1.6 nm and high stability at pH = 0. The dynamic nanosheets form adaptive defects/pores in the synthetic process of CoP nanoparticles, giving embedded composite with high hydrogen evolution activity (overpotential of 66 mV at 10 mA cm ) and stability. Computational calculations, X-ray photoelectron spectroscopy, and X-ray absorption spectroscopy unveil the electron modulation effects of the nanosheets. This pseudo-porous catalyst support also can be applied to other metal phosphides.
作为结构保护剂和电子调节剂，诸如石墨烯衍生物之类的催化剂载体通常通过共价键构建。在此，据报道氢键连接的超薄纳米片是一种新型的催化剂载体。三聚氰胺（M）和氰尿酸（CA）分子自组装形成类石墨的氢键共晶体M-CA，通过超声处理可轻松剥离该共晶体，从而得到厚度约为1.6 nm且在pH = 0时具有高稳定性的超薄纳米片。动态纳米片在CoP纳米颗粒的合成过程中形成适应性缺陷/孔隙，从而得到具有高析氢活性（在10 mA cm时过电位为66 mV）和稳定性的嵌入式复合材料。计算计算、X射线光电子能谱和X射线吸收光谱揭示了纳米片的电子调制效应。这种伪多孔催化剂载体也可应用于其他金属磷化物。
