Wuhan National Laboratory for Optoelectronics and School of Optical and Electronic Information, Huazhong University of Science and Technology, Wuhan 430074, China.
Nanoscale. 2018 Apr 19;10(15):6844-6849. doi: 10.1039/c8nr01556b.
Transition-metal phosphides (TMPs) are considered as promising non-noble electrochemical catalysts for hydrogen evolution reaction (HER). Their highly active sites are located on certain facets, and single crystalline two-dimensional (2D) structures enable them to expose the most active facets for HER. However, the synthesis of single crystalline 2D TMPs is still a challenge owing to their intrinsically non-layered structures. Herein, we demonstrate the synthesis of various single crystalline 2D TMPs (Co2P, MoP2, Ni12P5 and WP2) by a salt-templating method. The as-synthesized 2D Co2P exhibited efficient electrocatalytic ability for HER with an overpotential of 41 mV at 10 mA cm-2 and a Tafel slope of 35 mV dec-1 in 0.5 M H2SO4 solution. We expect that the synthesis of 2D TMPs reported here will open the way to expand the family of 2D materials for electrocatalysis and beyond.
过渡金属磷化物（TMPs）被认为是很有前途的非贵金属电催化剂，可用于析氢反应（HER）。它们的高活性位点位于某些晶面上，而单晶二维（2D）结构则使它们能够暴露最活跃的晶面用于 HER。然而，由于其内在的非层状结构，单晶 2D TMPs 的合成仍然是一个挑战。在此，我们通过盐模板法合成了各种单晶 2D TMPs（Co2P、MoP2、Ni12P5 和 WP2）。所合成的 2D Co2P 在 0.5 M H2SO4 溶液中具有高效的电催化 HER 能力，在 10 mA cm-2 时的过电势为 41 mV，塔菲尔斜率为 35 mV dec-1。我们期望这里报道的 2D TMPs 的合成将为扩展二维材料在电催化等领域的应用开辟道路。
