磷烯
材料科学
剥脱关节
兴奋剂
电化学
掺杂剂
电催化剂
化学工程
金属
密度泛函理论
纳米技术
化学物理
无机化学
光电子学
电极
物理化学
化学
石墨烯
计算化学
冶金
工程类
作者
Danni Liu,Jiahong Wang,Ji-Qing Lu,Chao Ma,Hao Huang,Zhongzheng Wang,Lie Wu,Qian Liu,Shaowei Jin,Paul K. Chu,Xue‐Feng Yu
标识
DOI:10.1002/smtd.201900083
摘要
Abstract 2D materials with large specific surface area and robust mechanical properties are appropriate for electrocatalysis. However, the unsatisfactory adsorption energy and limited active sites restrict their commercial application. Herein, a facile and rapid electrochemical strategy enabling synchronous exfoliation and doping is designed to directly synthesize metal‐doped 2D materials from the bulk crystals. By using black phosphorus as a model, various metal doped phosphorene such as BP (Co) , BP (Mo) , and BP (Ni) is obtained, and a synergistic synthesis mechanism is proposed. Notably, the dopant introduces electronic band transformation, charge redistribution, and state occupation confirmed by density functional theory calculations. Owing to the enhanced electro‐conductivity, abundant metal‐P active sites, and optimized adsorption energy by doping, the BP (metal) exhibits enhanced hydrogen evolution reaction activities and stability in comparison to the bare phosphorene. Particularly, BP (Co) presents highest activity with a potential of 0.294 V at 10 mA cm −2 (the current density is normalized with electrochemical surface area by using a double‐layer capacitance method). This study provides new access to synthesize highly efficient electrocatalysts, and also enriches the structure modulation means for layered 2D materials.
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