A novel Ni-Schiff base complex derived electrocatalyst for oxygen evolution reaction

Abstract

Efficient electrocatalysts for the oxygen evolution reaction (OER) are critical for various energy conversion devices such as metal-air batteries, rechargeable fuel cell, and water splitting for hydrogen production. In this work, a novel non-precious-metal OER catalyst was prepared from the pyrolysis of a Ni-Schiff base complex with thiourea. The derived catalyst is composed of nickel oxide coupled with nickel sulfide loaded on nitrogen-doped carbon matrix (NiO-NiS/N-C), which manifested excellent OER electrocatalytic activity, and an onset potential of 1.54 V vs reversible hydrogen electrode was achieved in alkaline electrolyte. The high performance of as-obtained electrocatalyst was illustrated by fully dispersed active components of NiO coupled with NiS nanoparticles, as well as the strong interaction between NiS, NiO particles, and N-doped carbon substrate. Our findings supply an easier path to fabricate the active catalyst through one-step metal organic framework transformation way and are promising for use in energy conversion systems and also yield new impetus for exploring other non-noble metal catalysts.

Rational Design of Metallic NiTex (x = 1 or 2) as Bifunctional Electrocatalysts for Efficient Urea Conversion

“…32 The peak at 854.4 can be ascribed to metal oxides. 33 NF provides the characteristic peaks of metallic Ni at 853.0 and 870.3 eV. 34,35 Typical Te 3d 5/2 and Te 3d 3/2 located at 573.3 and 583.7 eV can be identified from the high-resolution Te 3d XPS in Figure 3d.…”

Boosting the Bifunctional Oxygen Electrode Activity of Nitrogen-decorated Carbon Networks via Ni/NiO Addition for Li-Air and Zn-Air Batteries

“…The formation and structural confirmation of the Schiff base and the nickel Schiff-base complex were reported elsewhere. 24 Then, the formed complex precipitate was filtered and dried in ambient conditions. The resultant nickel complex was pyrolyzed at 750 °C for 5 h in Ar atmosphere to get the Ni/NiO/Nitrogen-doped carbon (NNONC) nanocomposite.…”