趙學(xué)波教授研究團(tuán)隊(duì)的一項(xiàng)最新研究成果在ACS Applied Materials & Interfaces期刊上正式發(fā)表
趙學(xué)波教授研究團(tuán)隊(duì)的一項(xiàng)最新研究成果在美國化學(xué)會旗下的ACS Applied Materials & Interfaces期刊上正式發(fā)表。題目是：
In Situ Synthesis Strategy for Hierarchically Porous Ni2P Polyhedrons from MOFs Templates with Enhanced Electrochemical Properties for Hydrogen Evolution；
http://pubs.acs.org/doi/abs/10.1021/acsami.7b01037；
DOI: 10.1021/acsami.7b01037。
該論文的第一作者是趙學(xué)波教授的博二研究生閆理停，其他作者包括代鵬程副教授、王穎（博三）、顧鑫副教授、李良軍副教授、曹磊（博一），趙學(xué)波教授為該論文的通訊作者。該工作以鎳基MOF-74為前驅(qū)體，采用原位磷化方法制備出具有梯級孔結(jié)構(gòu)的純相Ni2P多面體。這種多面體很好地保留了母體MOF的形貌，比表面積高，活性組分分散性能好，顯示出非常好的析氫活性，為電解水制氫提供了具有工業(yè)應(yīng)用前景的電極材料選項(xiàng)。
ABSTRACT: The development of highly active and stable noble metal-free electrocatalysts of hydrogen evolution reaction (HER) under both acidic and basic conditions for renewable energy conversion techniques is of great significance. Herein, a practical in situ synthesis strategy for a three-dimensional Ni2P polyhedron with a hierarchically porous structure was presented, which was efficiently obtained from a nickel centered metal-organic frameworks (MOF-74-Ni) by direct low-temperature phosphorization. The as-prepared Ni2P polyhedron showed a high BET
surface area (175.0 m2·g-1), hierarchically porous property, and outstanding metal dispersion, which well inherited the morphology and porosity of its MOF precursor. Compared with Ni2P particles obtained from a nonporous precursor, the as-prepared Ni2P polyhedron used as electrocatalyst exhibited excellent electrocatalytic performance toward the HER, with a low
overpotential of 158 mV to produce the cathodic current density of 10 mA cm-2. A small Tafel slope of 73 mV per decade is obtained for Ni2P polyhedron, which revealed a Volmer-Heyrovsky mechanism during the HER. In addition, benefiting from the structural stability, the porous Ni2P polyhedron used as a electrocatalyst showed satisfactory long-term durability for the HER in acidic
media.
