Open AccessInterface Effect of Ru‐MoS 2 Nanoflowers on Lignin Substrate for Enhanced Hydrogen Evolution Activity
Author(s) -
Xu Yeqing,
Jiang Xingxing,
Shao Gonglei,
Xiang Haiyan,
Si Sisi,
Li Xing,
Hu Travis Shihao,
Hong Guo,
Dong Shengyi,
Li Huimin,
Feng Yexin,
Liu Song
Publication year - 2021
Publication title -
energy and environmental materials
Language(s) - English
Resource type - Journals
ISSN - 2575-0356
DOI - 10.1002/eem2.12104
Subject(s) - tafel equation , overpotential , catalysis , substrate (aquarium) , molybdenum disulfide , materials science , electron transfer , chemical engineering , density functional theory , active site , hydrogen , exchange current density , doping , nanotechnology , chemistry , computational chemistry , optoelectronics , electrochemistry , electrode , organic chemistry , metallurgy , oceanography , engineering , geology
The catalytic performance of Molybdenum disulfide (MoS 2 ) has been still far from that of Pt‐based catalysts for inadequate active sites and sluggish electron transfer kinetics. Through engineering the interface between MoS 2 ‐based materials and supported substrates, hybrid Ru‐doped MoS 2 on carbonized lignin (CL) is designed and prepared as efficient catalyst for hydrogen evolution reaction (HER). The CL substrate not only facilitates the growth of MoS 2 nanoflowers, but also promotes the electron transfer. Ru doping increases active sites greatly for HER. The hybrid catalyst achieves a low onset overpotential of 25 mV and a low Tafel slope of 46 mV dec −1 . The favorable HER activity ascribes to the interfacial interaction between MoS 2 and CL. Density functional theory calculations further confirm the improved HER performance with doped Ru atoms. This study presents a prototype application to design electrocatalysts with enhanced carrier mobility and high‐density active sites based on interface effect.