@article{He2024, 
author = {Danyang He and Tianyang Li and Luozhen Jiang and Fei Wang and Zihao Xing and Nan Wang and Zhiyu Jia and Guo-Yu Yang},
title = {Polyoxometalate as the assembly material to self-assembled Ni(OH)2 nanosheets with electrocatalytic performance},
year = {2024},
journal = {Nano Research},
volume = {17},
number = {8},
pages = {7061-7067},
keywords = {polyoxometalate, Ni(OH)2, assembly, hydrogen evolution reaction, oxygen evolution reaction},
url = {https://www.sciopen.com/article/10.1007/s12274-024-6772-5},
doi = {10.1007/s12274-024-6772-5},
abstract = {Developing non-noble metal-based electrocatalyst with high catalytic activity is essential for advancing hydrogen energy technologies. This study introduces a hydrothermal method for synthesizing order Ni(OH)2 nanosheets, with H3O40PW12 (denoted as PW12) loaded onto reduced graphene oxide (rGO) coated on nickel foam (referred to as PW12-Ni(OH)2/rGO). This method contrasts with the electrodeposition of Ni(OH)2, where PW12 is added to the synthetic system to direct the assembly and morphology of the Ni(OH)2 through a hydrothermal reaction. In this work, the nickel foam acts dual roles as both the substrate and the source of nickel for the formation of Ni(OH)2. The PW12-Ni(OH)2/rGO nanosheets, when successfully prepared and loaded onto the nickel foam (NF), exhibited superior electrocatalytic activity for the hydrogen evolution reaction (HER) in an alkaline electrolyte, achieving a current density of 10 mA·cm−² at an overpotential of 69 mV. Furthermore, we endeavored to expand the application of this material towards the oxygen evolution reaction (OER) by preparing PW12-(Fe/Co)Ni(OH)2/rGO through the addition of metal cations. This nanocomposite displayed outstanding electrocatalytic activity in alkaline electrolytes, with a current density of 10 mA·cm−² at an overpotential of 211 mV, and demonstrated excellent stability over a 50 h period in a 1 M KOH solution. The results presented in this paper offer an effective strategy for the preparation of polyoxometalate-based inorganic materials with diverse functionalities, applicable to both HER and OER.}
}