摘要
Oxygen evolution reaction(OER)plays a crucial role in developing energy conversion and adjusting electronic structure of the electrocatalysts can effectively improve the catalytic activity and stability.However,it is a challenge to adjust the electronic structure on two-dimensional iridium dioxide nanosheets(IrO_(2)NS),which have the advantages of high atom utilization.Here,we regulate the surface properties of IrO_(2)NS through sulfonated carbon dots(SCDs)to promote the OER catalytic process.The catalyst IrO_(2)NS/SCDs-2 exhibited excellent catalytic activity with a lower overpotential of 180 mV than IrO_(2)NS(230 mV)at the current density of 10 mA·cm^(-2)in a 0.5 M H_(2)SO_(4) solution.And after 160 h of stability testing,the overpotential of IrO_(2)NS/SCDs-2 only decreased by 4 mV.Moreover,transient potential scanning test can visually demonstrate that the addition of SCDs improves the conductivity of the catalyst and increases the electron transfer rate.
基金
supported by Natural Science Foundation of Jiangsu Province(No.BK20220028)
the National Key R&D Program of China(Nos.2020YFA0406104 and 2020YFA0406101)
the National Natural Science Foundation of China(Nos.52271223,52272043,52202107,52201269,22273063 and 52302296)
the Science and Technology Development Fund,Macao SAR(No.0009/2022/ITP)
Collaborative Innovation Center of Suzhou Nano Science and Technology,the 111 Project and Suzhou Key Laboratory of Functional Nano and Soft Materials.
