One-Pot Hydrothermal Synthesis of Nickel Cobalt Telluride Nanorods for Hybrid Energy Storage Systems

Abstract

Herein, we delineate the one-pot preparation of nickel cobalt telluride nanorods (NiCoTe NRs) by the hydrothermal method using cetyltrimethylammonium bromide and ascorbic acid as reducing agents. The Ni0.7Co0.3Te NRs (NCT-1 NRs) were investigated with different characterization techniques, such as X-ray diffraction, field emission scanning electron microscopy, transmission electron microscopy, and X-ray photoelectron spectroscopy. Magnetic measurement shows the paramagnetic behavior of the prepared samples with the saturation magnetization. The NCT-1 NR-modified electrode is employed into the electrochemical hydrogen evolution reaction and hybrid supercapacitor applications. NCT-1 is demonstrated as a good electrocatalyst for the hydrogen evolution reaction at the onset potential of 244 mV versus reversible hydrogen electrode and delivered a high current density of 1 mA/cm2. NCT-1 displays a specific capacity of 433 C/g at 0.5 A/g current density and 100% capacity retention, even after 5000 cycles. Furthermore, a hybrid asymmetric supercapacitor device was fabricated on the basis of NCT-1 as a positive electrode and orange-peel-derived activated carbon (OPC-700) as a negative electrode. It delivered a high energy density of 43 Wh/kg and a power density of 905 W/kg with long cyclic stability of 91% after 25 000 cycles.

Nickel Cobalt Telluride Nanorods for Sensing the Hydrogen Peroxide in Living Cells

“…Structural and morphological studies, such as XRD, XPS, BET, and TEM, for the prepared samples have been analyzed and discussed in our previous report. 17 Figure S1(a,b) displays the FESEM images of NCT 1 and NCT W. The prepared materials show uniform morphology of nanorods. Figure S1c reveals the the XRD pattern for NCT-W corresponds to nickel telluride [International Centre for Diffraction Data (ICDD) number 00-065-3665] and cobalt telluride (ICDD number 00-089-7180).…”

“…Structural and morphological studies, such as XRD, XPS, BET, and TEM, for the prepared samples have been analyzed and discussed in our previous report. 17 where α o, I, I s , and β ef f are the linear absorption coefficient at 532 nm, input laser intensity, saturation intensity, and two photon absorption coefficient, respectively. The corresponding propagation equation is given as…”

“…Structural and morphological studies, such as XRD, XPS, BET, and TEM, for the prepared samples have been analyzed and discussed in our previous report Figure S1­(a,b) displays the FESEM images of NCT 1 and NCT W. The prepared materials show uniform morphology of nanorods.…”

A CoNi telluride heterostructure supported on Ni foam as an efficient electrocatalyst for the oxygen evolution reaction

“…10,11 In addition, compared with S and Se, Te possesses lower electronegativity, which makes metal tellurides have stronger metal character, endowing them with ferromagnetism behavior and properties. 12,13 When employed as electrocatalysts, metal tellurides outperform other chalcogenide-based catalysts. Wang et al 14 reported that a NiTe nanosheet film on nickel foam (NiTe/NF) exhibits remarkable oxygen evolution reaction activity requiring an overpotential as low as 262 mV to deliver an anodic current density of 10 mA cm −2 .…”

Controllable Preparation of Cu NPs/CNTs@PANI Composites as Electrode Materials for Electrochemical Double-Layer Capacitors

“…According to the energy storage theory, pseudocapacitors with fast reversible Faradic reactions on the electrode surface can effectively enhance the specific capacitance of electrode materials . Therefore, some pseudocapacitive materials have been designed, such as metallic and nonmetallic heteroatoms (nickel, silver, copper, iron, nitrogen, boron, phosphorus, etc. − ).…”