三维Ni_(3)S_(2)@NiCo-LDH纳米复合材料合成及其电氧化尿素制氢性能研究

Synthesis of three-dimensional Ni_(3)S_(2)@NiCo-LDH nanocomposite and study on its properties in hydrogen production from electro-oxidation of urea

为设计高效、廉价和耐用的催化裂解水制氢电催化剂,合成了Ni_(3)S_(2)纳米线@NiCo-LDH纳米复合材料(Ni_(3)S_(2)@NiCo-LDH)。结果表明,该复合材料具有大量的活性位点,表现出很好的电催化制氢性能。在含有尿素的KOH电解液中,Ni_(3)S_(2)@NiCo-LDH电极材料仅需1.373 V就能达到10 mA/cm~2的电流密度。在双电极体系Ni_(3)S_(2)@NiCo-LDH//Pt中,电流密度为10 mA/cm~2时电压仅为1.463 V。因此,Ni_(3)S_(2)@NiCo-LDH纳米复合材料是一种优良的新型催化水解产氢电催化剂。

Aiming to design fficient,inexpensive,and durable electrocatalyst for hydrogen production via catalytic cracking of water,Ni_(3)S_(2)nanowire@NiCo-LDH nanocomposite(Ni_(3)S_(2)@NiCo-LDH)is synthesized.The results show that the prepared composite has a large number of active sites and exhibits excellent electrocatalytic hydrogen production performance.Ni_(3)S_(2)@NiCo-LDH electrode material achieves a current density of 10 mA·cm^(-2) at only 1.373 V in a KOH electrolyte containing urea.In Ni_(3)S_(2)@NiCo-LDH//Pt,a two-electrode system,the voltage is only 1.463 V at a current density of 10 mA·cm^(-2).It is verified that Ni_(3)S_(2)@NiCo-LDH nanocomposite is an excellent new catalytic hydrolysis hydrogen production electrocatalyst.