Bimetallic Iron–Cobalt Catalysts and Their Applications in Energy-Related Electrochemical Reactions

Abstract

Since the persistently increasing trend of energy consumption, technologies for renewable energy production and conversion have drawn great attention worldwide. The performance and the cost of electrocatalysts play two crucial roles in the globalization of advanced energy conversion devices. Among the developed technics involving metal catalysts, transition-metal catalysts (TMC) are recognized as the most promising materials due to the excellent properties and stability. Particularly, the iron–cobalt bimetal catalysts exhibit exciting electrochemical properties because of the interior cooperative effects. Herein, we summarize recent advances in iron–cobalt bimetal catalysts for electrochemical applications, especially hydrogen evolution reaction (HER), oxygen evolution reaction (OER), and oxygen reduction reaction (ORR). Moreover, the components and synergetic effects of the composites and catalytic mechanism during reaction processes are highlighted. On the basis of extant catalysts and mechanism, the current issues and prospective outlook of the field are also discussed.

Heterostructure from heteromixture: unusual OER activity of FeP and CoP nanostructures on physical mixing

“…S17 and Table T6†) with varying percentages of CoP in FeP confirms the interaction between the metal sites. 55 The stability of the FeP–CoP catalyst checked for 3000 cycles (accelerated degradability test) shows only a 5% loss in activity (Fig. 3f).…”

Nitrogen-Doped Carbon-Encapsulated FeCo Alloy Nanostructures with Surface-Dangling Fe(Co)-Nx Active Sites for Oxygen Reduction in Alkaline and Acid Media

“…The synergistic effect of M-N x -C and alloy nanoparticles (NPs) plays a robust promoter for efficient ORR catalysis. − For instance, Kong et al synthesized a Co 5.47 N–Co 3 Fe 7 coupled composite anchored on a tremella-like carbon framework. Due to the interaction between Co 5.47 N and Co 3 Fe 7 , the Co 5.47 N@Co 3 Fe 7 /N-C-900 catalyst exhibited excellent electrocatalytic performance.…”

Bimetallic ZIF-Derived Co/N-Codoped Porous Carbon Supported Ruthenium Catalysts for Highly Efficient Hydrogen Evolution Reaction

“…Finding a suitable material as the support for active centers is also crucial to ensure the effective interactions between the different phases involved in most electrocatalytic reaction processes [ 17 , 18 ]. Recently, the preparation of metal/carbon-based porous materials using metal organic frameworks (MOFs) as precursors has emerged as a hot research issue [ 4 , 19 , 20 ].…”