Electrocatalytic activity sites for the oxygen evolution reaction on binary cobalt and nickel phosphides.

ABSTRACT: Binary cobalt and nickel phosphides have been widely developed owing to their remarkable activities for the oxygen reduction reaction (OER) as well as their low cost. However, the OER active sites of binary cobalt and nickel phosphides are still controversial. Here, we use a CoNiP nanocage as a model catalyst and systematically investigate the correlation between the composition and the OER activity, clarifying how the ratio of CoOOH/NiOOH affects the OER activity. With the increase of the atomic ratio of Ni/Co (y/x, 0 < y/x < 3.5), the amount of NiOOH generated during the OER always increases; and the CoOOH initially increases and subsequently decreases, showing a similar changing tendency to the OER activity of CoNiP. When y/x = 1.5, CoNiP has th

SUBMITTER: Zhou LN 

PROVIDER: S-EPMC9057415 | biostudies-literature | 2020 Oct

REPOSITORIES: biostudies-literature