In situ growth of ultrathin Ni–Fe LDH nanosheets for high performance oxygen evolution reaction

Abstract

The ultrathin Ni70Fe30LDH nanosheets were successfullyin situgrown on anodic polarized copper foil, denoted as u-Ni70Fe30LDHs/a-CF. Benefiting from the ultrathin nanosheet structure, the catalyst exhibits remarkable catalytic performance for OER in 1 M KOH solution.

Layered double hydroxide-based electrocatalysts for the oxygen evolution reaction: identification and tailoring of active sites, and superaerophobic nanoarray electrode assembly

“…Although significant efforts have been made in the fields of active site identification, OER mechanistic study and efficient catalyst preparation, the bottlenecks hindering the application of LDHs for industrial scale water splitting are the phase transformation 183,184 and dissolution 184 of LDHs at high working potentials. The decay and dissolution mechanisms have been studied by several groups and the progress achieved can be helpful in designing stable OER catalysts based on LDHs and overcoming the intrinsic weakness.…”

A review of anion-regulated multi-anion transition metal compounds for oxygen evolution electrocatalysis

“…LDH materials containing transition metal ions such as Fe, Co, Ni, and Mn have been identified as efficient OER catalysts. 38,47,48,[136][137][138][139][140][141][142][143][144][145][146][147][148] In addition to the morphological control and cation regulation of the LDHs, the intercalated anions are also an important part of LDHs, and their OER activity can be improved by regulating the intercalated anions.…”

Hierarchical Ni2P@NiFe LDH Heterostructural Nanosheet Arrays for Highly Efficient Oxygen Evolution Reaction

“…The Ni 2p spectrum in Figure 4a presents two prominent peaks at 855.1 and 873.1 eV accompanied with two shakeup satellite peaks, which correspond to Ni 2p 3/2 and Ni 2p 1/2 respectively. According to the fitting curves, the peaks centered at 871.4 and 853.5 eV are ascribed to the bond of Ni−P, [21] while the fitting peaks at 855.1 and 873.1 eV belong to the Ni 2+ signal of NiFe LDH [22] . For the XPS spectra of Fe 2p (Figure 4b), two main peaks located at 712.6 and 725.9 eV are assigned to Fe 2p 3/2 and Fe 2p 1/2 , respectively, which are the characteristic binding energies of Fe 3+ in NiFe LDH nanosheets [10] .…”