Gold-Supported Nanostructured NiFeCoPr Hydroxide as a High-Performance Supercapacitor Electrode and Electrocatalyst toward the Oxygen Evolution Reaction

Abstract

Facile and high-performance electrode materials are crucial for the conversion and storage of clean energy. A gold-supported nanostructured NiFeCoPr hydroxide is synthesized by directly electrodepositing praseodymium-doped nickel–cobalt–iron hydroxide onto a gold-deposited nickel foam (NF) substrate. The resultant monolithic NiFeCoPrO-Au/NF electrode exhibits a high specific capacitance (1792 F g–1 at a current density of 10 A g–1), excellent rate capability (1445 F g–1 at a current density of 70 A g–1), and eminent capacitance retention (99.5% after 30 000 cycles) in 3 M KOH electrolyte. When used as an oxygen evolution electrocatalyst, NiFeCoPrO-Au/NF shows high catalytic activity for the oxygen evolution reaction with a small Tafel slope of 28 mV dec–1 in 1 M KOH electrolyte and excellent stability over 10 h. These characteristics demonstrate the enormous potential of the NiFeCoPrO-Au/NF electrode for applications in electrocatalysis and supercapacitors.

MOF-based ionic sieve interphase for regulated Zn2+ flux toward dendrite-free aqueous zinc-ion batteries

“…11 Besides, water-insalt electrolytes and some electrolyte additives have also been adopted to inhibit the side reactions and dendrites. 12,13 Introducing a protective layer on the zinc anode has also drawn growing attention because of its good operability. For example, Xia et al recently reported the construction of a ZrO 2 -coated zinc anode.…”

Construction of honeycomb-like Te-doped NiCo-LDHs for aqueous supercapacitors and as oxygen evolution reaction electrocatalysts

“…Open demonstrated the coexistence of Co 3+ (780.8 eV) and Co 2+ (783.7 eV) and the main ingredient was Co 3+ . 44 As displayed in Figure 3e, the deconvolution of O 1s spectrum gave a hint for the presence of the adsorbed water (532.1 eV), hydroxide or oxyhydroxide group (-OOH or -OH, 531.2 eV), and lattice oxygen bonds (O-M, 529.6 eV), 25,45 where -OH/-OOH groups were found to be the major oxygen component. According to the XPS analysis (Table S1 Field-emission scanning electron microscopy (FE-SEM) analysis was implemented to identify the structural feature and morphology of the title electrode HS-Te-NiCo-LDH/NiO/NF (Figure 4).…”

“…For the efficient doping of metal or non-metal elements into heteromultimetallic hydroxides, electrochemical deposition has proven to be a rapid and practical method. 25 Besides, electrode materials with macro/micro/mesoporous hierarchical structures are highly favorable for the superior electrochemical performance in view of the more active sites, shorter paths for charge transfer, and improved charge-discharge efficiency. 26,27 On the one hand, the three-dimensional (3D) nickel foam (NF) can be used as the substrate to provide macropores, as well as the high specific surface area and electrical conductivity.…”

“…26,27 On the one hand, the three-dimensional (3D) nickel foam (NF) can be used as the substrate to provide macropores, as well as the high specific surface area and electrical conductivity. 25 On the other hand, for the generation of micro-or mesopores, the dynamic oxygen bubble template method (DOBT) 28,29 was taken into account, which made use of anodic oxygen (O 2 ) bubbles as gaseous templates via the controlled OER during the anodic electrodeposition process. Due to the sluggish four-electron transfer kinetics and large overpotential, the sizes of O 2 bubbles by OER are tinier and the process is more controllable when compared to the opposite H 2 bubble template technique occurring on the cathodic electrode.…”

Recent Progress in the Development of Advanced Functionalized Electrodes for Oxygen Evolution Reaction: An Overview

“…A monolithic electrocatalyst was designed for OER activity based on the electrodeposition of a rare-earth praseodymium-doped nickel−cobalt−iron hydroxide (NiFeCoPrO) onto a gold-deposited nickel foam (NF) substrate [ 63 ]. NiFeCoPrOAu/NF appeared in a size range between 2 and 80 nm, with a peak volume of ~3.5 nm.…”