Structured nanoporous-gold/Al-fiber: galvanic deposition preparation and reactivity for the oxidative coupling of methanol to methyl formate

2014 ◽  
Vol 16 (6) ◽  
pp. 2992-2996 ◽  
Author(s):  
Qiaofei Zhang ◽  
Yakun Li ◽  
Li Zhang ◽  
Li Chen ◽  
Ye Liu ◽  
...  
Keyword(s):  
Oxidative Coupling ◽  
Methyl Formate ◽  
Cost Effective ◽  
Nanoporous Gold ◽  
Highly Active ◽  
3D Network ◽  
Galvanic Deposition

Microfibrous-structured nanoporous gold (NPG) on Al-fiber catalysts, obtained by galvanic deposition onto a 3D network using 50 μm Al-fiber, is cost-effective, highly active/selective and stable for the oxidative coupling of methanol to methyl formate.

Thin-sheet microfibrous-structured nanoporous gold/Al fiber catalysts for oxidative coupling of methanol to methyl formate

2014 ◽  
Vol 317 ◽  
pp. 54-61 ◽  
Author(s):  
Qiaofei Zhang ◽  
Yakun Li ◽  
Li Zhang ◽  
Li Chen ◽  
Ye Liu ◽  
...  
Keyword(s):  
Oxidative Coupling ◽  
Methyl Formate ◽  
Thin Sheet ◽  
Nanoporous Gold

scholarly journals WS(1−x)Sex Nanoparticles Decorated Three-Dimensional Graphene on Nickel Foam: A Robust and Highly Efficient Electrocatalyst for the Hydrogen Evolution Reaction

Nanomaterials ◽  
2018 ◽  
Vol 8 (11) ◽  
pp. 929 ◽  
Author(s):  
Sajjad Hussain ◽  
Kamran Akbar ◽  
Dhanasekaran Vikraman ◽  
Rana Afzal ◽  
Wooseok Song ◽  
...  
Keyword(s):  
Hydrogen Evolution ◽  
Hydrogen Evolution Reaction ◽  
Large Scale ◽  
Nickel Foam ◽  
Transition Metal Dichalcogenides ◽  
Three Dimensional ◽  
Cost Effective ◽  
Highly Efficient ◽  
Highly Active ◽  
Earth Abundant

To find an effective alternative to scarce, high-cost noble platinum (Pt) electrocatalyst for hydrogen evolution reaction (HER), researchers are pursuing inexpensive and highly efficient materials as an electrocatalyst for large scale practical application. Layered transition metal dichalcogenides (TMDCs) are promising candidates for durable HER catalysts due to their cost-effective, highly active edges and Earth-abundant elements to replace Pt electrocatalysts. Herein, we design an active, stable earth-abundant TMDCs based catalyst, WS(1−x)Sex nanoparticles-decorated onto a 3D porous graphene/Ni foam. The WS(1−x)Sex/graphene/NF catalyst exhibits fast hydrogen evolution kinetics with a moderate overpotential of ~−93 mV to drive a current density of 10 mA cm−2, a small Tafel slope of ~51 mV dec−1, and a long cycling lifespan more than 20 h in 0.5 M sulfuric acid, which is much better than WS2/NF and WS2/graphene/NF catalysts. Our outcomes enabled a way to utilize the TMDCs decorated graphene and precious-metal-free electrocatalyst as mechanically robust and electrically conductive catalyst materials.

Promotional effect of copper(ii) on an activated carbon supported low content bimetallic gold–cesium(i) catalyst in acetylene hydrochlorination

RSC Advances ◽  
2015 ◽  
Vol 5 (123) ◽  
pp. 101427-101436 ◽  
Author(s):  
Jia Zhao ◽  
Shanchuan Gu ◽  
Xiaolong Xu ◽  
Tongtong Zhang ◽  
Xiaoxia Di ◽  
...  
Keyword(s):  
Activated Carbon ◽  
Cost Effective ◽  
Viable Alternative ◽  
Acetylene Hydrochlorination ◽  
Effective Catalyst ◽  
Highly Active ◽  
Promotional Effect ◽  
Effect Of Copper

Cu-added low content AuCs/AC worked as highly active, stable and cost-effective catalyst for acetylene hydrochlorination. Our findings suggest that the AuCuCs/AC catalyst can be envisioned as a viable alternative to commercial toxic HgCl2for acetylene hydrochlorination.

Cobalt and nitrogen co-doped porous carbon/carbon nanotube hybrids anchored with nickel nanoparticles as high-performance electrocatalysts for oxygen reduction reactions

Nanoscale ◽  
2020 ◽  
Vol 12 (24) ◽  
pp. 13028-13033 ◽  
Author(s):  
Yan Wu ◽  
Liya Ge ◽  
Andrei Veksha ◽  
Grzegorz Lisak
Keyword(s):  
Carbon Nanotube ◽  
Porous Carbon ◽  
High Performance ◽  
Nickel Nanoparticles ◽  
Metal Organic Frameworks ◽  
Cost Effective ◽  
Oxygen Reduction Reactions ◽  
Highly Active ◽  
Metal Organic ◽  
Co Doped

A highly active and cost-effective ORR catalyst was made from metal–organic frameworks and shows an excellent ORR performance, comparable to that of commercial Pt/C.

Methyl ester synthesis catalyzed by nanoporous gold: from 10−9 Torr to 1 atm

2015 ◽  
Vol 5 (2) ◽  
pp. 1299-1306 ◽  
Author(s):  
Lu-Cun Wang ◽  
Kara J. Stowers ◽  
Branko Zugic ◽  
Monika M. Biener ◽  
Juergen Biener ◽  
...  
Keyword(s):  
Methyl Ester ◽  
Oxidative Coupling ◽  
Pressure Range ◽  
Methyl Esters ◽  
Nanoporous Gold ◽  
Selective Synthesis ◽  
Ester Synthesis ◽  
Mild Conditions ◽  
Wide Pressure Range ◽  
Wide Pressure

Highly selective synthesis of methyl esters can be achieved by oxidative coupling of methanol and aldehydes (acetaldehyde, butyraldehyde) under mild conditions using unsupported nanoporous gold catalysts over a wide pressure range (from 10−9 Torr to 1 atm).

COST-EFFECTIVENESS OF ADHERENCE INTERVENTIONS FOR HIGHLY ACTIVE ANTIRETROVIRAL THERAPY: A SYSTEMATIC REVIEW

2013 ◽  
Vol 29 (3) ◽  
pp. 227-233 ◽  
Author(s):  
Tim Mathes ◽  
Dawid Pieper ◽  
Sunya-Lee Antoine ◽  
Michaela Eikermann
Keyword(s):  
Systematic Review ◽  
Cost Effectiveness ◽  
Antiretroviral Therapy ◽  
Highly Active Antiretroviral Therapy ◽  
Cost Effective ◽  
Sensitivity Analyses ◽  
Baseline Scenario ◽  
Highly Active ◽  
Adherence Interventions ◽  
The Cost

Objectives: The objective of this systematic review was to evaluate the cost-effectiveness of interventions aiming to increase the adherence to highly active antiretroviral therapy (HAART) in HIV-infected patients in developed countries (WHO stratum A).Methods: A systematic search for comparative health economic studies was conducted in the following databases: EMBASE, MEDLINE, NHS Economic Evaluation Database, CINAHL, HEED, and EconLit. The identified publications were selected by two reviewers independently according to predefined inclusion and exclusion criteria. Furthermore, these were evaluated according to a standardized checklist and finally extracted, analyzed, and summarized.Results: After reviewing the abstracts and full texts four relevant studies were identified. Different educational programs were compared as well as the Directly Observed Therapy (DOT). A critical aspect to be considered in particular was the poor transparency of the cost data. In three cost-utility analyses the costs per quality-adjusted life-year (QALY) in the baseline scenario were each under USD 15,000. The sensitivity analyses with a presumed maximum threshold of USD 50,000/QALY showed a predominantly cost-effective result. In one study that examined DOT the costs add up to over USD 150,000/QALY.Conclusions: It seems that adherence interventions for HAART in HIV-infected patients can be cost-effective. Nevertheless, the quality of the included studies is deficient and only a few of the possible adherence interventions are taken into consideration. A final assessment of the cost-effectiveness of adherence interventions in general is, therefore, not possible.

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