@article{Dong2018, 
author = {Qiuchun Dong and Yizhou Zhang and Ziyang Dai and Peng Wang and Min Zhao and Jinjun Shao and Wei Huang and Xiaochen Dong},
title = {Graphene as an intermediary for enhancing the electron transfer rate: A free-standing Ni3S2@graphene@Co9S8 electrocatalytic electrode for oxygen evolution reaction},
year = {2018},
journal = {Nano Research},
volume = {11},
number = {3},
pages = {1389-1398},
keywords = {three-dimensional, graphene, Ni3S2@G@Co9S8, oxygen evolution reaction},
url = {https://www.sciopen.com/article/10.1007/s12274-017-1754-5},
doi = {10.1007/s12274-017-1754-5},
abstract = {A highly active and stable oxygen evolution reaction (OER) electrocatalyst is critical for hydrogen production from water splitting. Herein, three-dimensional Ni3S2@graphene@Co92S8 (Ni3S2@G@Co9S8), a sandwich-structured OER electrocatalyst, was grown in situ on nickel foam; it afforded an enhanced catalytic performance when highly conductive graphene is introduced as an intermediary for enhancing the electron transfer rate and stability. Serving as a free-standing electrocatalytic electrode, Ni3S2@G@Co9S8 presents excellent electrocatalytic activities for OER: A low onset overpotential (2 mA·cm-2 at 174 mV), large anode current density (10 mA·cm-2 at an overpotential of 210 mV), low Tafel slope (66 mV·dec-1), and predominant durability of over 96 h (releasing a current density of ~14 mA·cm-2 with a low and constant overpotential of 215 mV) in a 1 M KOH solution. This work provides a promising, cost-efficient electrocatalyst and sheds new light on improving the electrochemical performance of composites through enhancing the electron transfer rate and stability by introducing graphene as an intermediary.}
}