查找使用阿拉丁产品的科研文献

Interface engineering of Mo-doped Ni9S8/Ni3S2 multiphase heterostructure nanoflowers by one step synthesis for efficient overall water splitting

Liyan Wang,Xiangdong Xue,Qingjie Luan,Junzhen Guo,Liang Chu,Zhaokun Wang,Baozhen Li,Mu Yang,Ge Wang

Accelerating charge transfer efficiency by constructing heterogeneous interfaces on metal-based substrates is an effective way to improve the electrocatalytic performance of materials. However, minimizing the substrate-catalyst interfacial resistance to maximize catalytic activity remains a challenge. This study reports a simple interface engineering strategy for constructing Mo-Ni 9 S 8 /Ni 3 S 2 heterostructured nanoflowers . Experimental and theoretical investigations reveal that the primary role assumed by Ni 3 S 2 in Mo-Ni 9 S 8 /Ni 3 S 2 heterostructure is to replace nickel foam (NF) substrate for electron conduction, and Ni 3 S 2 has a lower potential energy barrier (0.76 to 1.11 eV) than NF (1.87 eV), resulting in a more effortless electron transfer. The interface between Ni 3 S 2 and Mo-Ni 9 S 8 effectively regulates electron redistribution, and when the electrons from Ni 3 S 2 are transferred to Mo-Ni 9 S 8 , the potential energy barriers at the heterogeneous interface are 1.06 eV, lower than that between NF and Ni 3 S 2 (1.53 eV). Mo-Ni 9 S 8 /Ni 3 S 2 -0.1 exhibited excellent oxygen evolution reaction (OER)/hydrogen evolution reaction (HER) bifunctional catalytic activity in 1 M KOH, with overpotentials of only 223 mV@100 mA cm −2 for OER and 116 mV@10 mA cm −2 for HER . Moreover, when combined with an alkaline electrolytic cell, it required only an ultra-low cell voltage of 1.51 V to drive a current density of 10 mA cm −2 . This work provides new inspirations for rationally designing interface engineering for advanced catalytic materials.