Enhanced stability and ultrahigh activity of amorphous ripple nanostructured Ni-doped Fe oxyhydroxide electrode toward synergetic electrocatalytic water splitting

Abstract

The development of high-performance catalysts for oxygen-evolution reaction (OER) is paramount for cost-effective conversion of renewable electricity to fuels and chemicals.

Ultra‐Durability and Enhanced Activity of Amorphous Cobalt Anchored Polyaniline Synergistic towards Electrocatalytic Water Oxidation

“…The overpotential of Co@PANI‐600 (341 mV) was found to be 40 mV smaller than IrO 2 (381 mV) (Figure S3). The current density of Co@PANI‐600 was also higher than the reference electrocatalyst under alkaline condition (Figure 7a) [45] . The 341 mV overpotential with current density 10 mA cm −2 was enough for matric apt solar synthesis [46–48] .…”

“…The amorphous Co@PANI‐600 electrocatalyst (0.5 mg cm −2 ) was evenly coated an active material NF (Co@PANI‐600/NF) to enhance the active surface area and minimised the stress thus providing route for oxygen evolution. The current density of 10 mA cm −2 have been generated by Co@PANI‐600/NF electrocatalyst at overpotential of 251 mV which was found to be 110 and 170 mV lower than IrO 2 /NF (361 mV) and bare NF (421 mV), respectively (Figure 9a) [45] . The Tafel slope of Co@PANI‐600/NF electrode was 153 mV dec −1 which was drastically smaller than IrO 2 /NF (182 mV dec −1 ) and bare NF (234 mV dec −1 ) (Figure 9b).…”

Ferrocene Decorated N‐doped Carbon Modified Electrode with Enhanced Electrocatalytic Activity towards Non‐enzymatic Glucose Detection

“…The de-convoluted Fe 2p, S 2p, C 1s and O 1s spectra of FC-S-NDCN was obtained by Gaussian-fitting. The peaks at 709.8 and 718.6 eV was ascribed to Fe 2p3/2 and Fe 2p1/2, respectively [33] and de-convoluted C 1s spectrum exhibit peaks at 283.6 eV (CÀ C), 285.1 eV (CÀ O, & CÀ N), 287.32 eV (C=O) and 288.09 eV (OÀ C=O & C=N) are confirms that N-doped carbon (NDCN) which are typical composition of carbon lattice (Figure 4) [34]. The de-convoluted S 2p spectrum display peaks at 161.49, 162.18, 162.97, 163.99 and 168.54 eV for CÀ SÀ C, C=S, CÀ S=O and S À respectively.…”

“…The S 2p results gives the information about Fc-SH in NDCN. The deconvoluted O 1s spectrum reveal two peaks at 527.9, 531.8 and 532.5 eV attributed to lattice oxygen species (O 2À ) and hydroxyl group or surface adsorbed oxygen or oxidized nitrogen atoms, respectively (Figure 4) [33].…”

Inexpensive Amorphous FeIII Oxo‐/Hydroxide as Highly Active and Ultradurable Electrocatalyst for Water Electrolysis

“…), nonprecious transition metals based catalyst have been exploited as promising alternative to Ir‐ and Ru‐ based catalysts, specific role of each element in enhancing the activity is still unclear [32–34] . The reactivity order of Ni(Fe)−OxHy>Co(Fe)OxHy> FeOxHy−AuOx>FeOxHy>CoOxHy>NiOxHy>MnOxHy shows that Fe in (oxy)hydroxides has been shown as efficient catalyst with more active sites, [34–41] however, role of Fe in these catalysts are not summarized [38,39] . Therefore, efforts have been made to enhance OER activity and stability of Fe‐containing electrocatalysts.…”