Self-supporting catalysts beat powder electrodes for the electrocatalytic oxygen evolution reaction: a cobalt-based catalyst as an example

Abstract

The residuals have received little attention during the preparation process of catalysts without binders via the hydrothermal method. Employing Ni foam-supported Co₃O₄ and CuCo₂O₄ materials for water oxidation reactions as two examples, it is noteworthy that the electrocatalytic performance of Co₃O₄ and CuCo₂O₄ from residuals is lower than that of Ni foam-supported Co₃O₄ and CuCo₂O₄, and supported catalysts have a higher specific performance and turnover frequency compared to corresponding residuals. Considering the large-scale application, the catalysts without binders should be given more attention during the preparation process of the catalysts via the hydrothermal method.