A bifunctional nanoporous Ni–Co–Se electrocatalyst with a superaerophobic surface for water and hydrazine oxidation

Abstract

The superaerophobic nature induced by the porous structure of Ni0.6Co0.4Se results in its superior electrocatalytic performance towards both HzOR and OER.

Co0.85Se magnetic nanoparticles supported on carbon nanotubes as catalyst for hydrogen evolution reaction

“…The peaks at 54.2 and 55.4 eV are assigned to Se 3d5/2 and Se 3d3/2, respectively, and the additional peak at around 60 eV deconvoluted into peaks corresponding to Se-O bonding structures and Co 3p [34,35]. The presence of SeOx in the samples could be ascribed to surface oxidation, which is in good agreement with previous reports [36]. The high-resolution C 1s peak of MWCNTMWCNTs/Co0.85Se (Fig.…”

Ultrathin NiSe Nanosheets on Ni Foam for Efficient and Durable Hydrazine-Assisted Electrolytic Hydrogen Production

“…Electrochemical water splitting is regarded as a convenient and promising pathway for hydrogen production due to the inexhaustibility of the raw materials and being free of pollution to the environment . The electrochemical splitting process of water includes two half reactions: the hydrogen evolution reaction (HER, 2H 2 O + 2e – → H 2 + 2OH – , 0 V vs RHE) and the oxygen evolution reaction (OER, 4OH – → O 2 + 2H 2 O + 4e – , 1.23 V vs RHE). − Due to the complex four-electron transfer process, , OER features sluggish reaction kinetics, which poses a major obstacle to high-efficiency water electrolysis. Consequently, strategies for replacing the OER with other oxidation reactions with superior kinetic characteristics are necessary to realize the incredible potential of water electrolysis.…”

Ultrasound-assisted fabrication of Ti3C2Tx MXene toward enhanced energy storage performance

“…The GCD curve of the 8 h sonicated sample retains a superior rate capability of ca 50% at 5 A/g, indicating an outstanding quick charge–discharge performance of the electrode prepared by the 8 h sonicated sample. Electrochemical impedance spectroscopy (EIS) was further performed to study the charge transfer resistance (Rct) and ion transport in the tested electrode [27] , [28] , Nyquist plots of all samples showed negligible semicircles and a relatively low Rct, suggesting that removal of Al did not significantly affect the electronic conductivity of Ti 3 C 2 Tx. In the low-frequency range, interpretation of Nyquist plots for all the four tested electrodes suggests a good ionic conductivity of the electrodes, i.e., at low frequencies, the slope of the plot for 8 h-unsonicated sample shows lower diffusion resistance compared to the sonicated samples.…”