文献类型：期刊文献

英文题名：Heterointerface Engineering of Ni2P-Co2P Nanoframes for Efficient Water Splitting

作者：Ji, Lvlv[1];Wei, Yujie[1];Wu, Pingru[2];Xu, Mingze[3];Wang, Tao[1];Wang, Sheng[1];Liang, Qifeng[2];Meyer, Thomas J.[4];Chen, Zuofeng[3]

机构：[1]Zhejiang Sci Tech Univ, Sch Mat Sci & Engn, Hangzhou 310018, Peoples R China;[2]Shaoxing Univ, Dept Phys, Shaoxing 312000, Peoples R China;[3]Tongji Univ, Sch Chem Sci & Engn, Shanghai 200092, Peoples R China;[4]Univ N Carolina, Dept Chem, Chapel Hill, NC 27599 USA

年份：2021

卷号：33

期号：23

起止页码：9165

外文期刊名：CHEMISTRY OF MATERIALS

收录：SCI-EXPANDED(收录号：WOS:000753956100013)、、WOS

基金：This work was financially supported by the National Natural Science Foundation of China (21872105 and 22072107), Natural Science Foundation of Zhejiang Province (LQ20B030001 and LY20E020002) and China Postdoctoral Science Foundation (2021M702305).

语种：英文

外文关键词：Binary alloys - Density functional theory - Doping (additives) - Electrocatalysis - Electrocatalysts - Electrodes - Etching - Gas adsorption - Hydrogen - Hydrogen evolution reaction - Mass transfer - Nanocatalysts - Precious metals - Precipitation (chemical)

外文摘要：Designing highly active, stable, bifunctional, noble-metal-free electrocatalysts for hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) is a major challenge in water splitting. We report here a novel, frame-like nanostructured catalyst (Ni,Co)(2)P nanoframe (NF), which consists of heterostructured Ni2P-Co2P nanoparticles embedded in the N-doped carbon matrix. Its synthesis involves precipitation, chemical etching, and a final phosphidation step to give an optimized electronic structure that contains multiple catalytic active sites and facilitates mass transfer. The catalyst is a bifunctional catalyst for both HER and OER and is superior to the individual components Ni2P and Co2P samples and (Ni,Co)(2)P solid nanocubes. When the (Ni,Co)(2)P NF catalyst was employed as both the cathode and anode for overall water splitting, a remarkably low cell voltage of 1.54 V was required to achieve a current density of 10 mA cm(-2). Density functional theory calculations verify the strong electronic interaction between Ni2P and Co2P at the heterointerfaces, resulting in an optimized hydrogen adsorption strength for enhanced HER electrocatalysis. Moreover, the synthetic strategy has been generalized for the synthesis of Ni-Co dichalcogenide NFs, thereby holding a great promise for a variety of potential applications.