Cobalt oxide is a very promising material for supercapacitor with high theoretical specific capacitance. However, its poor cyclability resulting from the faradaic pseudocapacitive characteristics ...restricts its application. In this study, we employ an efficient strategy by introducing in-situ reduced graphene oxide to establish a porous conductive network for electron and ion transporting. A series composites of cobalt oxide nanowires supported on reduced graphene oxide are successfully synthesized with the assistance of cetyltrimethylammonium bromide by a facile hydrothermal method. The as-prepared composites are investigated by X-ray diffraction, Raman spectroscopy, X-ray photoelectron spectroscopy, Nitrogen physisorption, Scanning electron microscopy and Transmission electron microscopy, as well as electrochemical analysis in a three-electrode system. Remarkably, the composite exhibits a maximum specific capacitance of 531 F g−1 at a 0.1 A g−1 current density accompanying a 64% capacitance retention after 2000 cycles at a high current density of 10 A g−1.
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•A novel idea of using CTAB and in-situ reduced GO to fabricate nanowires is proposed.•CTAB played a critical role in controlling the size and the aggregation of Co3O4.•The crystal seeds grew into needle due to the oxygen groups and confined space of GO.•The electrochemical properties of Co3O4 are highly improved after deposition on RGO.•(Co3O4/RGO)3 exhibits a maximum specific capacitance up to 531 F g−1 at 0.1 A g−1.
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•A facile green chemical reduction approach was used to prepare Pd-graphene catalyst.•Raman, XPS and TEM analysis confirmed the synthesis of graphene decorated with ...Pd.•Pd/RGO-salicylic acid shows superior catalytic activity towards nitrobenzene reduction.•Pd-graphene catalyst has a remarkable turnover frequency for nitrobenzene reduction.
A facile green chemical reduction approach is developed to synthesize palladium (Pd) nanoparticles (NPs) supported on reduced graphene oxide (RGO) using exfoliated graphite oxide as a precursor with various reducing agents, including salicylic acid, oxalic acid, ascorbic acid, NaOH and hydrazine hydrate. The as-prepared catalysts were characterized by X-ray diffraction (XRD), Raman spectroscopy, Fourier transfer infrared (FT-IR), X-ray photoelectron spectroscopy (XPS) and transmission electron microscopy (TEM). The catalytic performance has been examined for the reduction of nitrobenzene using sodium borohydride as a reducing agent under mild conditions. Our findings indicated that most of oxygen functionalities are removed using green chemical reduction approach associated with the good catalytic performance. The catalytic activity depends particularly on target concentration, catalyst loading and reaction time. The results of this research would develop a new one-pot synthesis avenue for the preparation of Pd/RGO nanocomposite materials and provides the application of Pd/RGO into the heterogeneous catalysis.
We propose herein initial results to develop optimum redox mediators by the combination of computational simulation and catalytic functionalization of the core structure of vitamin K3. We aim to ...correlate the calculated energy value of the LUMO of different vitamin K3 derivatives with their actual redox potential. For this, we optimized the catalytic alkylation of 1,4-naphthoquinones with a designed Ag(i)/GO catalyst and synthesized a series of molecules.
We propose herein initial results to develop optimum redox mediators by the combination of computational simulation and catalytic functionalization of the core structure of vitamin K
. We aim to ...correlate the calculated energy value of the LUMO of different vitamin K
derivatives with their actual redox potential. For this, we optimized the catalytic alkylation of 1,4-naphthoquinones with a designed Ag(i)/GO catalyst and synthesized a series of molecules.
We propose herein initial results to develop optimum redox mediators by the combination of computational simulation and catalytic functionalization of the core structure of vitamin K
3
. We aim to ...correlate the calculated energy value of the LUMO of different vitamin K
3
derivatives with their actual redox potential. For this, we optimized the catalytic alkylation of 1,4-naphthoquinones with a designed Ag(
i
)/GO catalyst and synthesized a series of molecules.
We propose herein initial results to develop optimum redox mediators by the combination of computational simulation and catalytic functionalization of the core structure of vitamin K
3
.
