TY - JOUR
T1 - Hofmann-Type Metal-Organic Framework Nanosheets for Oxygen Evolution
AU - Wang, Tingting
AU - Wu, Yu
AU - Han, Ying
AU - Xu, Peiwen
AU - Pang, Yijun
AU - Feng, Xinzhen
AU - Yang, Hao
AU - Ji, Weijie
AU - Cheng, Tao
N1 - Publisher Copyright:
©
PY - 2021/12/24
Y1 - 2021/12/24
N2 - Developing an efficient and low-cost electrocatalyst is important in energy conversion and storage, while it is challenging especially in the oxygen evolution reaction (OER) owing to the sluggish kinetic process. Hofmann-type metal-organic frameworks (MOFs) are layer-structured materials, and if they are synthesized in the form of regular-shaped and slim nanosheets, a higher density of exposed active sites and easier electron and mass transport will be expected. In the current study, we prepared such a type of Hofmann MOFs plus Ni site tuning for the OER. The characterizations verified the successful material synthesis and characteristics. Density functional theory (DFT) simulations proved that the Ni site modified by Fe atom is more efficient for the critical OH∗ as well as O∗ intermediate formation. Taking advantage of the designed unique structure configuration, the as-obtained Fe-Ni Hofmann-type MOF showed the OER activity with an overpotential of 290 mV at the current density of 10 mA cm-2 and a Tafel slope of 44 mV dec-1, the very best performance plus outstanding durability among the Hofmann-type MOFs for the OER known to date.
AB - Developing an efficient and low-cost electrocatalyst is important in energy conversion and storage, while it is challenging especially in the oxygen evolution reaction (OER) owing to the sluggish kinetic process. Hofmann-type metal-organic frameworks (MOFs) are layer-structured materials, and if they are synthesized in the form of regular-shaped and slim nanosheets, a higher density of exposed active sites and easier electron and mass transport will be expected. In the current study, we prepared such a type of Hofmann MOFs plus Ni site tuning for the OER. The characterizations verified the successful material synthesis and characteristics. Density functional theory (DFT) simulations proved that the Ni site modified by Fe atom is more efficient for the critical OH∗ as well as O∗ intermediate formation. Taking advantage of the designed unique structure configuration, the as-obtained Fe-Ni Hofmann-type MOF showed the OER activity with an overpotential of 290 mV at the current density of 10 mA cm-2 and a Tafel slope of 44 mV dec-1, the very best performance plus outstanding durability among the Hofmann-type MOFs for the OER known to date.
KW - electrocatalyst
KW - Hofmann-type metal-organic framework
KW - oxygen evolution reaction
KW - two-dimensional (2D) nanosheets
UR - http://www.scopus.com/inward/record.url?scp=85119993570&partnerID=8YFLogxK
U2 - 10.1021/acsanm.1c03619
DO - 10.1021/acsanm.1c03619
M3 - Article
AN - SCOPUS:85119993570
SN - 2574-0970
VL - 4
SP - 14161
EP - 14168
JO - ACS Applied Nano Materials
JF - ACS Applied Nano Materials
IS - 12
ER -