A comparative study of NiCo2O4 catalyst supported on Ni foam and from solution residuals fabricated by a hydrothermal approach for electrochemical oxygen evolution reaction

Abstract

Residuals have rarely been granted attention when employing a hydrothermal approach to prepare binder-free supported catalysts. Using Ni foam supported NiCo₂O₄ catalyst for oxygen evolution reaction as an example, it was found that the catalytic activity of NiCo₂O₄ from the residuals loaded on glass carbon is comparable to Ni foam supported NiCo₂O₄, while the specific activity and turnover frequency value of the former catalyst are many times higher than that of the supported catalyst. In view of sustainability and green development, residuals should be given more attention when catalyst is prepared using the hydrothermal fabrication approach.