Hydrothermal synthesis of nitrogen-doped graphene hydrogels using amino acids with different acidities as doping agents

Abstract

Nitrogen-doped graphene hydrogels were synthesized using amino acids as doping agents. The acidity of the amino acid affects the morphology and ultimately the electrochemical performance of the material.

Thermal gravity analysis for the study of stability of graphene oxide–glycine nanocomposites

“…5, the GO-G nanocomposites have less thermal stability than GO. Because nanocomposite GO-G, in addition to the withdrawal of CO 2 gas from the molecular structure, structure of nanocomposite with increasing temperature decomposed and nitrogen gas, carbon dioxide gas, etc., will be withdrawal from the molecule of nanocomposite GO-G [13][14][15].…”

Nitrogen and Sulfur Dual-Doped Reduced Graphene Oxide: Synergistic Effect of Dopants Towards Oxygen Reduction Reaction

“…The deconvoluted N1s spectrum (Figure 1d) of SN-rGO shows the presence of two types of N atoms. The characteristic peak for pyridinic and pyrrolic N appeared at the binding energy of 398.9 and 400.7 eV, respectively [45][46][47][48]. It is interesting to note that 66% of the total N in SN-rGO is of pyridinic in nature and is considered to be the most active site for the catalytic reduction of oxygen [19,25].…”

Optical Absorption of Small Palladium‐Doped Gold Clusters

“…[35,36] Using density functional theory (DFT) calculations, low energy structures of Pd doped gold clusters of different sizes and charge states have been predicted: Au n Pdq (n = 1-4, q = −1,0,1), [36] Au n Pd m (n + m ≤ 14), [37] Au n M (n = 1-7, M = Ni, Pd, Pt), [29] Au n Pd (n = 1-4), [38] and Au 32-m Pd m (m = 1, 2, 4, 6). [39] It has been shown that also the properties of larger Au nanoparticles (2-5 nm) can be significantly modified by introduction of other metals. In particular, in the Au-Pd alloy nanoparticles an increased d-electron density at the Au sites was observed by XANES experiments, giving rise to a Au "white" line intensity decrease and decreasing Au 4f binding energies in x-ray photoelectron spectroscopy studies, evidencing the charge transfer from Pd to Au 5d orbitals.…”