X射线光电子能谱
材料科学
电化学
催化作用
兴奋剂
化学工程
吸附
相(物质)
密度泛函理论
吸收光谱法
吸收(声学)
X射线吸收光谱法
氧烷
纳米技术
光谱学
物理化学
化学
电极
计算化学
光电子学
复合材料
有机化学
物理
工程类
量子力学
作者
Yongteng Qian,Jianmin Yu,Zhiyi Lyu,Qianwen Zhang,Tae Hyeong Lee,Huan Pang,Dae Joon Kang
摘要
Abstract Phase engineering is an efficient strategy for enhancing the kinetics of electrocatalytic reactions. Herein, phase engineering was employed to prepare high‐performance phosphorous‐doped biphase (1T/2H) MoS 2 (P‐BMS) nanoflakes for hydrogen evolution reaction (HER). The doping of MoS 2 with P atoms modifies its electronic structure and optimizes its electrocatalytic reaction kinetics, which significantly enhances its electrical conductivity and structural stability, which are verified by various characterization tools, including X‐ray photoelectron spectroscopy, high‐resolution transmission electron microscopy, X‐ray absorption near‐edge spectroscopy, and extended X‐ray absorption fine structure. Moreover, the hierarchically formed flakes of P‐BMS provide numerous catalytic surface‐active sites, which remarkably enhance its HER activity. The optimized P‐BMS electrocatalysts exhibit low overpotentials (60 and 72 mV at 10 mA cm −2 ) in H 2 SO 4 (0.5 M) and KOH (1.0 M), respectively. The mechanism of improving the HER activity of the material was systematically studied using density functional theory calculations and various electrochemical characterization techniques. This study has shown that phase engineering is a promising strategy for enhancing the H* adsorption of metal sulfides.
科研通智能强力驱动
Strongly Powered by AbleSci AI