Highly Efficient Multifunctional Co–N–C Electrocatalysts with Synergistic Effects of Co–N Moieties and Co Metallic Nanoparticles Encapsulated in a N-Doped Carbon Matrix for Water-Splitting and Oxygen Redox Reactions

2019 ◽  
Vol 11 (43) ◽  
pp. 39809-39819 ◽  
Author(s):  
Dandan Lyu ◽  
Yonghua Du ◽  
Shangli Huang ◽  
Bahari Yaser Mollamahale ◽  
Xiaoran Zhang ◽  
...  
Keyword(s):  
Water Splitting ◽  
Metallic Nanoparticles ◽  
Redox Reactions ◽  
Synergistic Effects ◽  
Carbon Matrix ◽  
Highly Efficient

scholarly journals A Co-MOF-derived flower-like CoS@S,N-doped carbon matrix for highly efficient overall water splitting

RSC Advances ◽  
2021 ◽  
Vol 11 (27) ◽  
pp. 16823-16833
Author(s):  
Akerke Bereketova ◽  
Muthuchamy Nallal ◽  
Mohammad Yusuf ◽  
Sanha Jang ◽  
Karthick Selvam ◽  
...  
Keyword(s):  
Water Splitting ◽  
Noble Metal ◽  
Low Cost ◽  
Carbon Matrix ◽  
Pt Catalysts ◽  
Highly Efficient ◽  
Overall Water Splitting ◽  
Highly Effective

In this study, we constructed a highly effective, low-cost, non-noble-metal-based electrocatalyst to replace Pt catalysts, with a CoS@SNC catalyst being successfully synthesized.

One-Dimensional TiO2@GaON Core-Shell Nanowires with Controlled Shell Thickness from Atomic Layer Deposition for Stable and Efficient Photoelectrochemical Water Splitting

2019 ◽  
Author(s):  
Jiajia Tao ◽  
Hong-Ping Ma ◽  
Kaiping Yuan ◽  
Yang Gu ◽  
Jianwei Lian ◽  
...  
Keyword(s):  
Atomic Layer Deposition ◽  
Band Gap ◽  
Water Splitting ◽  
Atomic Layer ◽  
Photoelectrochemical Water Splitting ◽  
Core Shell ◽  
Photoelectrochemical Performance ◽  
Highly Efficient ◽  
Layer Deposition ◽  
Shell Nanowires

<div>As a promising oxygen evolution reaction semiconductor, TiO2 has been extensively investigated for solar photoelectrochemical water splitting. Here, a highly efficient and stable strategy for rationally preparing GaON cocatalysts on TiO2 by atomic layer deposition is demonstrated, which we show significantly enhances the</div><div>photoelectrochemical performance compared to TiO2-based photoanodes. For TiO2@20 nm-GaON core-shell nanowires a photocurrent density up to 1.10 mA cm-2 (1.23 V vs RHE) under AM 1.5 G irradiation (100 mW cm-2) has been achieved, which is 14 times higher than that of TiO2 NWs. Furthermore, the oxygen vacancy formation on GaON as well as the band gap matching with TiO2 not only provides more active sites for water oxidation but also enhances light absorption to promote interfacial charge separation and migration. Density functional theory studies of model systems of GaON-modified TiO2 confirm the band gap reduction, high reducibility and ability to activate water. The highly efficient and stable systems of TiO2@GaON core-shell nanowires provide a deeper understanding and universal strategy for enhancing photoelectrochemical performance of photoanodes now available. </div>

scholarly journals Dietary Nanoparticles Interact with Gluten Peptides and Alter the Intestinal Homeostasis Increasing the Risk of Celiac Disease

2021 ◽  
Vol 22 (11) ◽  
pp. 6102
Author(s):  
Clara Mancuso ◽  
Francesca Re ◽  
Ilaria Rivolta ◽  
Luca Elli ◽  
Elisa Gnodi ◽  
...  
Keyword(s):  
Celiac Disease ◽  
Metallic Nanoparticles ◽  
Synergistic Effects ◽  
Food Sector ◽  
Intestinal Homeostasis ◽  
Gluten Peptides ◽  
Transmission Electron ◽  
Duodenal Biopsies ◽  
Junction Proteins

The introduction of metallic nanoparticles (mNPs) into the diet is a matter of concern for human health. In particular, their effect on the gastrointestinal tract may potentially lead to the increased passage of gluten peptides and the activation of the immune response. In consequence, dietary mNPs could play a role in the increasing worldwide celiac disease (CeD) incidence. We evaluated the potential synergistic effects that peptic-tryptic-digested gliadin (PT) and the most-used food mNPs may induce on the intestinal mucosa. PT interaction with mNPs and their consequent aggregation was detected by transmission electron microscopy (TEM) analyses and UV–Vis spectra. In vitro experiments on Caco-2 cells proved the synergistic cytotoxic effect of PT and mNPs, as well as alterations in the monolayer integrity and tight junction proteins. Exposure of duodenal biopsies to gliadin plus mNPs triggered cytokine production, but only in CeD biopsies. These results suggest that mNPs used in the food sector may alter intestinal homeostasis, thus representing an additional environmental risk factor for the development of CeD.

Polyoxometalate driven dendrite-free zinc electrodes with synergistic effects of cation and anion cluster regulation

2021 ◽  
Vol 9 (11) ◽  
pp. 7025-7033
Author(s):  
Hai-Yang Wu ◽  
Xingxing Gu ◽  
Peng Huang ◽  
Chuang Sun ◽  
Hai Hu ◽  
...  
Keyword(s):  
Synergistic Effects ◽  
Electrolyte Additives ◽  
Highly Efficient ◽  
Anion Cluster ◽  
Free Zinc ◽  
Anions And Cations

Dendrite-free Zn anodes are achieved by using the highly efficient electrolyte additives based on polyoxometalate. Both of the anions and cations of polyoxometalate play important roles in inhibiting the growth Zn dendrites.

scholarly journals Graphene/MoS2/FeCoNi(OH)x and Graphene/MoS2/FeCoNiPx multilayer-stacked vertical nanosheets on carbon fibers for highly efficient overall water splitting

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Xixi Ji ◽  
Yanhong Lin ◽  
Jie Zeng ◽  
Zhonghua Ren ◽  
Zijia Lin ◽  
...  
Keyword(s):  
Water Splitting ◽  
Carbon Fibers ◽  
Graphene Nanosheets ◽  
Water Electrolysis ◽  
Hybrid Structure ◽  
Hydrogen Energy ◽  
Highly Efficient ◽  
Overall Water Splitting ◽  
Stable Oxygen ◽  
Excellent Stability

AbstractDevelopment of excellent and cheap electrocatalysts for water electrolysis is of great significance for application of hydrogen energy. Here, we show a highly efficient and stable oxygen evolution reaction (OER) catalyst with multilayer-stacked hybrid structure, in which vertical graphene nanosheets (VGSs), MoS2 nanosheets, and layered FeCoNi hydroxides (FeCoNi(OH)x) are successively grown on carbon fibers (CF/VGSs/MoS2/FeCoNi(OH)x). The catalyst exhibits excellent OER performance with a low overpotential of 225 and 241 mV to attain 500 and 1000 mA cm−2 and small Tafel slope of 29.2 mV dec−1. Theoretical calculation indicates that compositing of FeCoNi(OH)x with MoS2 could generate favorable electronic structure and decrease the OER overpotential, promoting the electrocatalytic activity. An alkaline water electrolyzer is established using CF/VGSs/MoS2/FeCoNi(OH)x anode for overall water splitting, which generates a current density of 100 mA cm−2 at 1.59 V with excellent stability over 100 h. Our highly efficient catalysts have great prospect for water electrolysis.

Thermo-chemical water splitting: Selection of priority reversible redox reactions by multi-attribute decision making

2021 ◽  
Vol 170 ◽  
pp. 800-810
Author(s):  
Yimin Deng ◽  
Raf Dewil ◽  
Lise Appels ◽  
Shuo Li ◽  
Jan Baeyens ◽  
...  
Keyword(s):  
Decision Making ◽  
Water Splitting ◽  
Redox Reactions ◽  
Reversible Redox ◽  
Multi Attribute Decision Making ◽  
Chemical Water ◽  
Selection Of
Sign in / Sign up

Export Citation Format

Share Document