Ti₃AlC₂ MAX phase conversion to a novel 2D titanium carbo-oxide by an eco-friendly and low-cost method: highly selective gas sensing and supercapacitor evaluations

Abstract

Energy shortage and environmental pollution issues are two of the biggest challenges of our century. Therefore, research for innovative new materials to sort out such issues are urgent. In this...

Enhancing the Electrocatalytic Properties of a One-Pot Synthesis of Defect-Rich 2D/2D Nanoheterointerface of Titanium Carbo-Oxide and Molybdenum Disulfide for Hydrogen Evolution Reaction in Acidic Medium

“…The image in Figure b,c revealed discontinuous lattice fringes along the curled edges, indicating the presence of defects that may improve water electrolysis. Additionally, Figure d displays a selected area electron diffraction (SAED) pattern acquired from the structure, where the observed rings can be attributed to TCO, as previously shown, and the bright dots result from the crystalline nature of MoS 2 , as indexed. The residual presence of Al, which was detected by EDX elemental mapping (Figure e), is a result of the hexagonal crystal system of its precursor Ti 3 AlC 2 that is similar to MoS 2 and cannot be ignored in this analysis.…”

“…The C 1s in Figure b spectrum only showed one oxidation state associated with TCO. The position of the peak is in good agreement with previous results in the literature . O 1s, Al 2p, and S 2p spectra in Figure c–f, respectively, also only showed the presence of one oxidation state in agreement with previous reports on this material.…”

“…To summarize, although the HER results obtained from the combination of MoS 2 and MXene were promising, the preparation methods involved several steps were time-consuming and were not environmentally friendly, making them unsuitable for large-scale application. , Moreover, practical research is needed to design efficient 2D/2D lateral or vertical heterostructures with intimate contact and effective interfacial coupling. 2D carbo-titanium oxide is a new class of MXene-like structure that can be prepared by simple and environmentally friendly methods at relatively low temperatures . Recent reports on titanium carbo-oxide (TCO) indicate its good electrical conductivity, which can be very interesting for catalytic activity in HER .…”

“…2D carbo-titanium oxide is a new class of MXene-like structure that can be prepared by simple and environmentally friendly methods at relatively low temperatures. 26 Recent reports on titanium carbo-oxide (TCO) indicate its good electrical conductivity, which can be very interesting for catalytic activity in HER. 27 To date, there are no reports on the electrocatalytic activity of TCO.…”

“…The synthesis of TCO was done following the procedure published in our recent paper. 26 In a typical synthesis, 3.67 g of TMAOH and 0.97 g of Ti 3 AlC 2 (TMAOH:Ti 3 AlC 2 is 2:1) were mixed and stirred for 30 min. The resulting solution was transferred to a 50 mL Teflon-lined stainless steel autoclave and kept in an electric oven at 170 °C for 12 h. The obtained black sediment was collected and rinsed four times with ethanol until a clear supernatant was obtained with a pH value of 7.…”