Identifying the electrocatalytic active sites of a Ru-based catalyst with high Faraday efficiency in CO2-saturated media for an aqueous Zn–CO2 system

2020 ◽  
Vol 8 (30) ◽  
pp. 14927-14934
Author(s):  
Jeongwon Kim ◽  
Yejin Yang ◽  
Arim Seong ◽  
Hyuk-Jun Noh ◽  
Changmin Kim ◽  
...  
Keyword(s):  
Active Sites ◽  
Hydrogen Generation ◽  
Ru Nanoparticles ◽  
System P ◽  
Saturated Media

For the aqueous Zn–CO2 system, strongly embedded Ru nanoparticles on the substrate reveal the improved hydrogen generation activities for indirect CO2 utilization.

scholarly journals Ru Nanoparticles Embedded in Cubic Mesoporous Silica SBA-1 as Highly Efficient Catalysts for Hydrogen Generation from Ammonia Borane

Catalysts ◽  
2020 ◽  
Vol 10 (3) ◽  
pp. 267 ◽  
Author(s):  
Juti Rani Deka ◽  
Diganta Saikia ◽  
Kuo-Shu Hsia ◽  
Hsien-Ming Kao ◽  
Yung-Chin Yang ◽  
...  
Keyword(s):  
Mesoporous Silica ◽  
Active Sites ◽  
Hydrogen Generation ◽  
Ammonia Borane ◽  
High Dispersion ◽  
High Catalytic Activity ◽  
Porous Support ◽  
H2 Generation ◽  
Ru Nanoparticles ◽  
Cubic Mesoporous

Cubic mesoporous silica SBA-1 functionalized with carboxylic acid (-COOH), namely S1B-C10, is used as a support to fabricate and confine Ru nanoparticles (NPs). The uniformly dispersed organic functional groups in SBA-1 are beneficial in attracting Ru cations, and as a result, homogenously distributed small sized Ru NPs are formed within the mesopores. The prepared Ru@S1B-C10 is utilized as a catalyst for H2 generation from the hydrolysis of ammonia borane (AB). The Ru@S1B-C10 catalyst demonstrates high catalytic activity for H2 generation (202 mol H2 molRu min−1) and lower activation energy (24.13 kJ mol−1) due to the small sized Ru NPs with high dispersion and the support’s interconnected mesoporous structure. The nanosized Ru particles provide abundant active sites for the catalytic reaction to take place, while the interconnected porous support facilitates homogenous transference and easy dispersal of AB molecules to the active sites. The catalyst demonstrates good recycle ability since the accumulation and leaking of NPs throughout catalysis can be effectively prevented by the support.

scholarly journals Correction: Identifying the electrocatalytic active sites of a Ru-based catalyst with high Faraday efficiency in CO2-saturated media for an aqueous Zn–CO2 system

2020 ◽  
Vol 8 (30) ◽  
pp. 15187-15187
Author(s):  
Jeongwon Kim ◽  
Yejin Yang ◽  
Arim Seong ◽  
Hyuk-Jun Noh ◽  
Changmin Kim ◽  
...  
Keyword(s):  
Active Sites ◽  
System P ◽  
Saturated Media

Correction for ‘Identifying the electrocatalytic active sites of a Ru-based catalyst with high Faraday efficiency in CO2-saturated media for an aqueous Zn–CO2 system’ by Jeongwon Kim et al., J. Mater. Chem. A, 2020, DOI: 10.1039/d0ta03050c.

scholarly journals Photocatalytic conversion of ethylenediaminetetraacetic acid dissolved in real electroplating wastewater to hydrogen in a solar light-responsive system

2018 ◽  
Vol 77 (12) ◽  
pp. 2851-2857 ◽  
Author(s):  
En-Chin Su ◽  
Ju-Ting Lee ◽  
Yi-Jean Gong ◽  
Bing-Shun Huang ◽  
Ming-Yen Wey
Keyword(s):  
Charge Separation ◽  
Energy Production ◽  
Alternative Energy ◽  
Active Sites ◽  
Hydrogen Generation ◽  
Ethylenediaminetetraacetic Acid ◽  
Treated Wastewater ◽  
Generation Efficiency ◽  
Electroplating Wastewater ◽  
No Consumption

Abstract A sustainable and multifunctional photocatalysis-based technology has been established herein for simultaneous hydrogen generation and oxidation of ethylenediaminetetraacetic acid (EDTA) in real electroplating wastewater. When the photocatalyst concentration was 4 g/L and electroplating wastewater pH was 6, optimal adsorptions of EDTA2−, H+, and H2O were observed, while hydrogen generation efficiency reached 305 µmol/(h g). Owing to EDTA oxidation and occupation of the active sites of the photocatalyst by Ni ions or Ni-EDTA chelates, the charge separation and adsorptions of H+ and H2O decreased, reducing hydrogen generation efficiency with time. The lower EDTA and Ni concentrations in treated wastewater showed that photocatalytic conversion of EDTA in real electroplating wastewater to enhance hydrogen generation efficiency can be a practical alternative energy production technology. This study provided a novel idea to enhance the value of electroplating wastewater, to build a hydrogen generation route with no consumption of a valuable resource, and to reduce EDTA and Ni concentrations in electroplating wastewater.

In situ Synthesis of Nickel-Dimethylglyoxime/Black Phosphorus Nanorods for Photocatalytic Hydrogen Production from Water Splitting

NANO ◽  
2020 ◽  
Vol 15 (10) ◽  
pp. 2050125
Author(s):  
Hui’e Wang
Keyword(s):  
Hydrogen Production ◽  
Water Splitting ◽  
Active Sites ◽  
Hydrogen Generation ◽  
Hollow Structure ◽  
Black Phosphorus ◽  
In Situ Growth ◽  
Photocatalytic Hydrogen Production ◽  
Reaction Cycles

Here, a novel material consisting of black phosphorus (BP) and nickel-dimethylglyoxime nanorods was successfully prepared via a facile in situ calcination strategy, which possesses efficient catalytic activity for hydrogen production from water splitting. The reason for this phenomenon was explained by a series of characterization technologies such as SEM, TEM, XRD, UV–Vis, XPS and photoelectrochemical. We demonstrated that the fast e− transport channels were provided by the formed hollow structure of C@Ni-D nanorods, the highly exposed active sites on C@Ni-BP nanorods benefiting from the direct in situ growth of BP, the resulted synergetic effects of C@Ni-D-2 nanorods and BP achieved a better performance of photocatalytic hydrogen production from water splitting. The optimal hydrogen generation of C@Ni-BP-2 nanorods could reach up to 600[Formula: see text][Formula: see text]mol within 180[Formula: see text]min and the rate of hydrogen production did not decrease significantly after four repeated reaction cycles. This work may offer new direction in situ growth of novel catalysts for achieving highly efficient hydrogen production.

Geometric and Electronic Effects Contributing to N2 Dissociation Barriers on a Range of Active Sites on Ru Nanoparticles

2019 ◽  
Vol 123 (50) ◽  
pp. 30458-30466 ◽  
Author(s):  
Caitlin A. Casey-Stevens ◽  
Stephanie G. Lambie ◽  
Charlie Ruffman ◽  
Egill Skúlason ◽  
Anna L. Garden
Keyword(s):  
Active Sites ◽  
Electronic Effects ◽  
Ru Nanoparticles

scholarly journals New gold standard: weakly capped infant Au nanoclusters with record high catalytic activity for 4-nitrophenol reduction and hydrogen generation from an ammonia borane–sodium borohydride mixture

2020 ◽  
Vol 2 (11) ◽  
pp. 5384-5395
Author(s):  
Dinabandhu Patra ◽  
Srinivasa Rao Nalluri ◽  
Hui Ru Tan ◽  
Mohammad S. M. Saifullah ◽  
Ramakrishnan Ganesan ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Citric Acid ◽  
Solid State ◽  
Gold Standard ◽  
Active Sites ◽  
Hydrogen Generation ◽  
High Catalytic Activity ◽  
Au Nanoclusters ◽  
Nitrophenol Reduction ◽  
Rapid Dissolution

Active sites are preserved in the citric acid-capped Au nanoclusters prepared in solid state. In water, the rapid dissolution of citric acid allows the reactants to easily access the active sites of infant Au nanoclusters leading to faster catalysis.

Environment-stimulated nanocarriers enabling multi-active sites for high drug encapsulation as an “on demand” drug release system

2018 ◽  
Vol 6 (15) ◽  
pp. 2258-2273 ◽  
Author(s):  
F. R. Cheng ◽  
T. Su ◽  
J. Cao ◽  
X. L. Luo ◽  
Li Li ◽  
...  
Keyword(s):  
Drug Release ◽  
Active Sites ◽  
Clinical Applications ◽  
Drug Encapsulation ◽  
High Drug ◽  
Release System ◽  
On Demand ◽  
System P ◽  
Drug Release System

Limited active sites in polyesters hinder fabrication of multifunctional biodegradable nanocarriers for successful clinical applications.

Swapping Catalytic Active Sites from Cationic Ni to Anionic S in Nickel Sulfide Enables More Efficient Alkaline Hydrogen Generation

2022 ◽  
pp. 2103359
Author(s):  
Pengyan Wang ◽  
Tingting Wang ◽  
Rui Qin ◽  
Zonghua Pu ◽  
Chengtian Zhang ◽  
...  
Keyword(s):  
Active Sites ◽  
Nickel Sulfide ◽  
Hydrogen Generation ◽  
Catalytic Active Sites
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