Transition metal ions regulated oxygen evolution reaction performance of Ni-based hydroxides hierarchical nanoarrays.

ABSTRACT: Nickel-based hydroxide hierarchical nanoarrays (Ni_yM(OH)_x HNAs M = Fe or Zn) are doped with non-noble transition metals to create nanostructures and regulate their activities for the oxygen evolution reaction. Catalytic performance in these materials depends on their chemical composition and the presence of nanostructures. These novel hierarchical nanostructures contain small secondary nanosheets that are grown on the primary nanowire arrays, providing a higher surface area and more efficient mass transport for electrochemical reactions. The activities of the Ni_yM(OH)_x HNAs for the oxygen evolution reaction (OER) followed the order of Ni_2.2Fe(OH)_x > Ni(OH)₂ > Ni_2.1Zn(OH)_x, and these trends ar

SUBMITTER: Zhou T 

PROVIDER: S-EPMC5382681 | biostudies-literature | 2017 Apr

REPOSITORIES: biostudies-literature