Prudent electrochemical pretreatment to promote the OER by catalytically inert “Iron incorporated metallic Ni nanowires” synthesized via the “non-classical” growth mechanism

Abstract

This study provides new insight towards the non-classical “amorphous to crystalline” growth mechanism for metal nanowire synthesis and reports an electrochemical strategy to activate inactive materials into efficient electrocatalysts for the OER.

Exploring the electrocatalytic prowess of a synergistic 1T-MoS2-metallic Ni composite towards alkaline hydrogen evolution

“…Similar textural patterns were also observed in our earlier report. 35 The HRTEM analysis additionally supports the formation of metallic Ni (Fig. S6, ESI †).…”

Ligand-Tuned Energetics for the Selective Synthesis of Ni2P and Ni12P5 Possessing Bifunctional Electrocatalytic Activity toward Hydrogen Evolution and Hydrazine Oxidation Reactions

“…Despite its wide adoption in electrocatalyst performance evaluation, the current density per unit geometric area of the electrode does not represent the true intrinsic electrocatalytic activity of nanoparticulate catalysts due to differences in the actual electrochemically active surface area (ECSA) and electrode geometric area. This topic has been discussed in the recent past by several research groups, including ours. − To date, there is no experimental method to accurately determine ECSA. The double-layer capacitance ( C dl ) of materials obtained from scan-rate-dependent cyclic voltammograms in the non-Faradaic region provides a qualitative comparison of the ECSA of different nanoparticulate catalysts. , The C dl values of Ni 2 P-Cys (100 μF/cm 2 ) and Ni 2 P-MPA (93.12 μF/cm 2 ) were higher than those of Ni 12 P 5 -Ser (18.4 μF/cm 2 ) and Ni 12 P 5 -CA (13.37 μF/cm 2 ) (Figures c and S7).…”

Engineering Active Sites Enriched 2D-on-1D NiFe and NiCo Layered Double Hydroxide-Decorated Ni Nanowire Networks for Oxygen Evolution Reaction

“…In contrast, our system exhibits features that are approximately 2 orders of magnitude smaller. This outstanding catalytic activity of NiFe LDH@Ni-NWN could be attributed to the presence of more potent catalytic sites with higher reaction efficiency, and the lower Tafel slope also implies that the rapid OER kinetics originate from the inclusion of Fe with its high intrinsic catalytic potency. , In detail, the significantly enhanced activity introduced upon the inclusion of Fe in the NiFe LDH/Ni-NWN electrocatalyst could be attributed to the following reasons: (i) The inclusion of Fe enhances the electrical conductivity of the Ni matrix. However, this outstanding OER performance can not only be assigned to this effect which highlights the previous findings that Fe represents the active site in the structure .…”