Rapid one-step synthesis of conductive and porous MnO2/graphene nanocomposite for high performance supercapacitors

2016 ◽  
Vol 776 ◽  
pp. 134-138 ◽  
Author(s):  
MinHo Yang ◽  
Bong Gill Choi
Keyword(s):  
High Performance ◽  
One Step ◽  
Graphene Nanocomposite

scholarly journals One-step cathodic electrodeposition of a cobalt hydroxide–graphene nanocomposite and its use as a high performance supercapacitor electrode material

RSC Advances ◽  
2018 ◽  
Vol 8 (47) ◽  
pp. 26818-26827 ◽  
Author(s):  
Seyed Abbas Rahimi ◽  
Parviz Norouzi ◽  
Mohammad Reza Ganjali
Keyword(s):  
High Performance ◽  
Electrode System ◽  
Constant Current ◽  
Cobalt Hydroxide ◽  
Supercapacitor Electrode ◽  
Constant Current Density ◽  
Cathodic Electrodeposition ◽  
Reduced Graphene ◽  
One Step ◽  
Graphene Nanocomposite

In this study, Co(OH)2-reduced graphene oxide has been synthesized using a simple and rapid one-step cathodic electrodeposition method in a two electrode system at a constant current density on a stainless steel plate, and then characterized as a supercapacitive material on Ni foam.

One step simultaneous electrochemical synthesis of NiO/multilayer graphene nanocomposite as an electrode material for high performance supercapacitors

2021 ◽  
Vol 31 (2) ◽  
pp. 160-162
Author(s):  
Daria V. Chernysheva ◽  
Igor N. Leontyev ◽  
Marina V. Avramenko ◽  
Nikolay V. Lyanguzov ◽  
Tatyana I. Grebenyuk ◽  
...  
Keyword(s):  
Electrode Material ◽  
Electrochemical Synthesis ◽  
High Performance ◽  
Multilayer Graphene ◽  
One Step ◽  
Graphene Nanocomposite

Synthesis of Fe2O3–Ni(OH)2/graphene nanocomposite by one-step hydrothermal method for high-performance supercapacitor

2015 ◽  
Vol 51 (6) ◽  
pp. 2877-2885 ◽  
Author(s):  
Haiyan Zhang ◽  
Yipeng Ye ◽  
Zhenghui Li ◽  
Yiming Chen ◽  
Peng Deng ◽  
...  
Keyword(s):  
Hydrothermal Method ◽  
High Performance ◽  
One Step ◽  
Graphene Nanocomposite

scholarly journals N, S and Transition-Metal Co-Doped Graphene Nanocomposites as High-Performance Catalyst for Glucose Oxidation in a Direct Glucose Alkaline Fuel Cell

Nanomaterials ◽  
2021 ◽  
Vol 11 (1) ◽  
pp. 202
Author(s):  
Yexin Dai ◽  
Jie Ding ◽  
Jingyu Li ◽  
Yang Li ◽  
Yanping Zong ◽  
...  
Keyword(s):  
Fuel Cell ◽  
Active Sites ◽  
High Performance ◽  
Glucose Oxidation ◽  
Alkaline Fuel Cell ◽  
Blank Group ◽  
Graphene Nanocomposites ◽  
Doped Graphene ◽  
One Step ◽  
Hydrothermal Approach

In this work, reduced graphene oxide (rGO) nanocomposites doped with nitrogen (N), sulfur (S) and transitional metal (Ni, Co, Fe) were synthesized by using a simple one-step in-situ hydrothermal approach. Electrochemical characterization showed that rGO-NS-Ni was the most prominent catalyst for glucose oxidation. The current density of the direct glucose alkaline fuel cell (DGAFC) with rGO-NS-Ni as the anode catalyst reached 148.0 mA/cm2, which was 40.82% higher than the blank group. The DGAFC exhibited a maximum power density of 48 W/m2, which was more than 2.08 folds than that of blank group. The catalyst was further characterized by SEM, XPS and Raman. It was speculated that the boosted performance was due to the synergistic effect of N, S-doped rGO and the metallic redox couples, (Ni2+/Ni3+, Co2+/Co3+ and Fe2+/Fe3+), which created more active sites and accelerated electron transfer. This research can provide insights for the development of environmental benign catalysts and promote the application of the DGAFCs.

scholarly journals Correction to: Interface Engineering of CoS/CoO@N‑Doped Graphene Nanocomposite for High‑Performance Rechargeable Zn–Air Batteries

2021 ◽  
Vol 13 (1) ◽  
Author(s):  
Yuhui Tian ◽  
Li Xu ◽  
Meng Li ◽  
Ding Yuan ◽  
Xianhu Liu ◽  
...  
Keyword(s):  
High Performance ◽  
Original Publication ◽  
Interface Engineering ◽  
Doped Graphene ◽  
Graphene Nanocomposite

In the original publication, the label text.

scholarly journals Facile Synthesis of Uniform Mesoporous Nb2O5 Micro-Flowers for Enhancing Photodegradation of Methyl Orange

Materials ◽  
2021 ◽  
Vol 14 (14) ◽  
pp. 3783
Author(s):  
Jian-Qing Qiu ◽  
Huan-Qing Xie ◽  
Ya-Hao Wang ◽  
Lan Yu ◽  
Fang-Yuan Wang ◽  
...  
Keyword(s):  
Methyl Orange ◽  
Active Sites ◽  
High Performance ◽  
Diffuse Reflectance Spectroscopy ◽  
X Ray Diffraction ◽  
Flower Structure ◽  
Electron Microscopies ◽  
Bet Method ◽  
One Step ◽  
Catalytic Active Sites

The removal of organic pollutants using green environmental photocatalytic degradation techniques urgently need high-performance catalysts. In this work, a facile one-step hydrothermal technique has been successfully applied to synthesize a Nb2O5 photocatalyst with uniform micro-flower structure for the degradation of methyl orange (MO) under UV irradiation. These nanocatalysts are characterized by transmission and scanning electron microscopies (TEM and SEM), X-ray diffraction (XRD), Brunauer–Emmett–Teller (BET) method, and UV-Vis diffuse reflectance spectroscopy (DRS). It is found that the prepared Nb2O5 micro-flowers presents a good crystal phases and consist of 3D hierarchical nanosheets with 400–500 nm in diameter. The surface area is as large as 48.6 m2 g−1. Importantly, the Nb2O5 micro-flowers exhibit superior catalytic activity up to 99.9% for the photodegradation of MO within 20 mins, which is about 60-fold and 4-fold larger than that of without catalysts (W/O) and commercial TiO2 (P25) sample, respectively. This excellent performance may be attributed to 3D porous structure with abundant catalytic active sites.

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