Design of NiFe‐based nanostructures for efficient oxygen evolution electrocatalysis

Abstract

The excessive using of fossil energy has caused serious environmental pollution, and the development and utilization of new energy sources have been a continuing research direction of concern. The synergistic effect of Ni and Fe is beneficial to reduce the reaction energy barrier of oxygen evolution reaction (OER), therefore NiFe based catalyst represents a very promising non-precious metal OER catalyst. This minireview focuses on the optimization strategies for NiFe based catalysts, summarizes the research progress made in recent years, and discusses the mechanisms involved in these strategies. After composition and structure optimization, the catalytic activity and stability of NiFe based catalysts have been improved, which is beneficial to OER. Finally, the development direction and research prospect of NiFe based catalysts are provided with a reasonable outlook.

Elevated temperature-driven coordinative reconstruction of an unsaturated single-Ni-atom structure with low valency on a polymer-derived matrix for the electrolytic oxygen evolution reaction

“…30 Efficient OER involves several features including cationic promotion, anion adjustment, defect sites, and ultrathin structures. 31 Extraordinarily activating OER with maximized electrocatalytic activity, individual NiSACs bond to oxygen sites on graphene-like carbon with superior activity and OER stability in Ni atom coordinating to oxygen as active sites. 32 Single Ni sites are favorable for promoting structural reconstruction into either dual metal sites or bridging with O atoms such as Ni–O–Fe bonds which creates spin channels for electron transfer.…”