نتایج جستجو برای: low cost catalyst

تعداد نتایج: 1531728  

2014
Maria Ángeles Fernández de Dios Olaia Iglesias Marta Pazos Maria Ángeles Sanromán

The applicability of electro-Fenton technology to remediation of wastewater contaminated by several organic pollutants such as dyes and polycyclic aromatic hydrocarbons has been evaluated using iron-enriched zeolite as heterogeneous catalyst. The electro-Fenton technology is an advanced oxidation process that is efficient for the degradation of organic pollutants, but it suffers from the high o...

2005
Jing Wu Jian-Xin Ji

Jing Wu et al. have synthesized enantiomerically pure secondary alcohols under mild reaction conditions. The stereospecific alcohols, formed by the hydrosilylation of prochiral ketones, are intermediates in the manufacturing of industrial compounds and pharmaceuticals. Previous methods for creating the alcohols have been hampered by the high cost of metal catalysts, low substrate-to-catalyst ra...

2016
Yixin Wu Taohuan Wang Yidie Zhang Sen Xin Xiaojun He Dawei Zhang Jianglan Shui

A low cost and non-precious metal composite material g-C3N4-LaNiO3 (CNL) was synthesized as a bifunctional electrocatalyst for the air electrode of lithium-oxygen (Li-O2) batteries. The composition strategy changed the electron structure of LaNiO3 and g-C3N4, ensures high Ni(3+)/Ni(2+) ratio and more absorbed hydroxyl on the surface of CNL that can promote the oxygen reduction reaction (ORR) an...

2014
P. Zhang B. B. Xiao X. L. Hou Y. F. Zhu Q. Jiang

The large-scale practical application of fuel cells cannot come true if the high-priced Pt-based electrocatalysts for oxygen reduction reaction (ORR) cannot be replaced by other efficient, low-cost, and stable electrodes. Here, based on density functional theory (DFT), we exploited the potentials of layered SiC sheets as a novel catalyst for ORR. From our DFT results, it can be predicted that l...

Journal: :Nature chemistry 2014
Patricia Hernandez-Fernandez Federico Masini David N McCarthy Christian E Strebel Daniel Friebel Davide Deiana Paolo Malacrida Anders Nierhoff Anders Bodin Anna M Wise Jane H Nielsen Thomas W Hansen Anders Nilsson Ifan E L Stephens Ib Chorkendorff

Low-temperature fuel cells are limited by the oxygen reduction reaction, and their widespread implementation in automotive vehicles is hindered by the cost of platinum, currently the best-known catalyst for reducing oxygen in terms of both activity and stability. One solution is to decrease the amount of platinum required, for example by alloying, but without detrimentally affecting its propert...

2013
Lisha Dong Chunfei Wu Paul T. Williams Jun Huang

Producing clean hydrogen from renewable resources will reduce our dependence on using fossil fuels towards a green and sustainable future. Biomass gasification is regarded as a promising technology for hydrogen production. In this work, low cost Ni-based catalyst was applied in a two-stage fixed bed reaction system. Fe was added into Ni-Al catalyst(80mol.% Al) by co-precipitation method with va...

2015
Justin D. Besant Jagotamoy Das Ian B. Burgess Wenhan Liu Edward H. Sargent Shana O. Kelley

Diagnosis of disease outside of sophisticated laboratories urgently requires low-cost, user-friendly devices. Disposable, instrument-free testing devices are used for home and physician office testing, but are limited in applicability to a small class of highly abundant analytes. Direct, unambiguous visual read-out is an ideal way to deliver a result on a disposable device; however, existing st...

2017
Jingrun Ran Guoping Gao Fa-Tang Li Tian-Yi Ma Aijun Du Shi-Zhang Qiao

Scalable and sustainable solar hydrogen production through photocatalytic water splitting requires highly active and stable earth-abundant co-catalysts to replace expensive and rare platinum. Here we employ density functional theory calculations to direct atomic-level exploration, design and fabrication of a MXene material, Ti3C2 nanoparticles, as a highly efficient co-catalyst. Ti3C2 nanoparti...

Journal: :Physical chemistry chemical physics : PCCP 2014
M Chisaka H Sasaki H Muramoto

Monoclinic HfO2 nanoparticles were doped with nitrogen via hydrothermal treatment that avoided high-cost pyrolysis with NH3 gas in order to develop a novel oxygen reduction reaction catalyst for use in acidic media. Catalyst size reduction was achieved using a reduced graphene oxide support, and activity above 0.8 V was obtained.

2013
L. FIGUEROA-VALVERDE Agustín Melgar

In this study, an aromatic derivative was synthetized; the first stage involve the reaction of 3,17-Dihydroxy-13-methyl-7,8,9,11,12,13,-14,-15,16,17-decahydro-6H-cyclopenta[a]-phenanthrene-2,4-dicarbaldehyde (compound 1) with ethylenediamine to form 2,4-Bis-[(2-aminoethylimino)-methyl]-13-methyl-7,8,9,11,12,13,14,15,16,17-decahydro-6H-cyclopenta[a]phenanthrene-3,17-diol(3) using boric acid as c...

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