Formation of porous NiCoV-LTH nanosheet arrays by in situ etching of nickel foam for the hydrogen evolution reaction at large current density

Abstract

The in-situ growth of NiCoV–LTH on nickel foam was reported for electrocatalytic hydrogen evolution reaction at large current density.

Interconnected MoS2/FeCo2S4 nanosheet array bifunctional electrocatalysts grown on carbon cloth for efficient overall water splitting

“…The peak position at 234.7 eV belongs to Mo 6+ , while the peak position at 226.3 eV belongs to S 2s. 29 The Co 2p spectrum (Fig. 4b) shows two obvious satellite peaks (Sat.…”

“…The peaks at 779.3 and 794.5 eV correspond to Co 3+ , and the peaks at 781.6 and 797.1 eV correspond to Co 2+ . 29 The Fe 2p spectrum exhibits two spin-orbit doublets (the 2p 3/2 and 2p 1/2 ). The first doublet at 707.9 and 722.0 eV and the second doublet at 712.7 and 726.7 eV are assigned to Fe 2+ and Fe 3+ , respectively.…”

In situ construction of superhydrophilic crystalline Ni3S2@amorphous VOx heterostructure nanorod arrays for the hydrogen evolution reaction with industry-compatible current density

“…The NiV-LDH material is composed of nickel and vanadium hydroxides of the laminates, interlayer anions (CO 3 2− ) and H 2 O molecules, where the nickel ions and vanadium ions are highly uniformly dispersed. [25][26][27] TAA generates HS − and NH 3 in the hydrolysis process, which can not only provide sulfide ions in the reaction system, but also create an alkaline environment. Therefore, the choice of TAA as the sulfur source provides conditions for the subsequent formation of sulfide/oxide hybrids.…”

Engineering transition metal catalysts for large-current-density water splitting

“…Rapid catalytic reactions at large currents will result in fast consumption of the electrolyte and large production of oxygen and hydrogen bubbles. 72,73 At this moment, mass transfer becomes the rate-determining step, which requires an immediate supply of the electrolyte and rapid efflux of bubbles. 63,74 In this context, constructing a catalyst with a porous structure to facilitate the mass transfer and bubble release is of vital significance.…”