Design and Synthesis of Cobalt ‐based Electrocatalysts for Oxygen Reduction Reaction

Abstract Oxygen reduction reaction (ORR) is the crucial step of various renewable energy conversion and storage technologies such as fuel cells and air‐batteries. Cobalt–based electrocatalysts including oxides/chalcogenides and Co−Nx/C, one kind of non‐precious metal electrocatalysts with competitive activity, enhanced durability, and acceptable cost, have been proposed as the potentially interesting alternatives to Pt‐based electrocatalysts. In this account, we summarized the synthesis methods and the corresponding main impact factors including ligand effect, particle size effect, crystal structure, nanostructure, defects and active centers related to the ORR performance on both of oxides/chalcogenides and Co−Nx/C. Some special points have been discussed on design and synthesis of low‐cost and high–performance cobalt‐based electrocatalysts with enhanced electrocatalytic activity. Also, the current challenges and future trends are proposed for improving the performance of Co‐involving electrocatalysts. Among non‐precious metal electrocatalysts for oxygen reduction reaction, Co−Nx‐C and chalcogenides have been paid more attention with fast increase in the published items in recent 5 years. In fact, Co−Nx−C and Co‐based oxide/chalcogenides have been recognized as the promising ORR alternatives to Pt‐based catalysts in the future.
Source: Contrast Media and Molecular Imaging - Category: Radiology Authors: Tags: Personal Account Source Type: research