The synthesis of Au@C@Pt core-double shell nanocomposite and its application in enzyme-free hydrogen peroxide sensing

2016 ◽  
Vol 378 ◽  
pp. 375-383 ◽  
Author(s):  
Yayun Zhang ◽  
Yuhui Li ◽  
Yingying Jiang ◽  
Yancai Li ◽  
Shunxing Li
Keyword(s):  
Hydrogen Peroxide ◽  
Free Hydrogen

Hydridoiridium(III) sulfoxide complexes and their reactivity toward dioxygen

1986 ◽  
Vol 64 (5) ◽  
pp. 897-903 ◽  
Author(s):  
Brian R. James ◽  
Robert H. Morris ◽  
Pal Kvintovics
Keyword(s):  
Hydrogen Peroxide ◽  
Oxidative Addition ◽  
H Nmr ◽  
Rate Determining Step ◽  
Free Hydrogen ◽  
Synthetic Routes

Synthetic routes to hydridoiridium(III) dimethylsulfoxide complexes via oxidative addition of HCl or H2 to precursor insitu iridium(I) species are described. The complexes, trans, mer-IrHCl2(DMSO)3 (1a) and cis, mer-IrH2Cl(DMSO)3 (2), have been characterized by 1H nmr and ir, and contain only S-bonded sulphoxide, DMSO. Comparison is made with data for other isomers reported in the literature, and some discrepancies are discussed. The decomposition of 1a and 2 in chloroform leads to isomers of IrCl3(DMSO)3, while (2) with HCl generates cis,cis IrHCl2(DMSO)2(DMSO) with the O-bonded sulfoxide trans to hydride. The reaction of 1a in dichloromethane with dioxygen occurs with a 1:1 stoichiometry and generates two complexes tentatively formulated as Ir(OH)Cl2(DMSO)2H2O (3) and IrCl2(O2)(DMSO)2DMSO (4); a hydroperoxide intermediate (Ir—OOH) initially formed from 1a is considered to react with further 1a in the rate-determining step. Oxidation of coordinated DMSO to the sulphone is not observed, implying that such a catalyzed O2-oxidation reported earlier in aqueous 2-propanol proceeds via reaction of IrOOH with free DMSO, or else via free hydrogen peroxide.

Enzyme-free hydrogen peroxide sensor based on Au@Ag@C core-double shell nanocomposites

2015 ◽  
Vol 347 ◽  
pp. 428-434 ◽  
Author(s):  
Yancai Li ◽  
Yayun Zhang ◽  
Yanmei Zhong ◽  
Shunxing Li
Keyword(s):  
Hydrogen Peroxide ◽  
Hydrogen Peroxide Sensor ◽  
Free Hydrogen

Sculpturing metal foams toward bifunctional 3D copper oxide nanowire arrays for pseudo-capacitance and enzyme-free hydrogen peroxide detection

2015 ◽  
Vol 3 (16) ◽  
pp. 8734-8741 ◽  
Author(s):  
Jianfei Huang ◽  
Huailong Li ◽  
Yihua Zhu ◽  
Qilin Cheng ◽  
Xiaoling Yang ◽  
...  
Keyword(s):  
Hydrogen Peroxide ◽  
Energy Storage ◽  
Copper Oxide ◽  
Metal Foams ◽  
Nanowire Arrays ◽  
Free Standing ◽  
Cuo Nanowires ◽  
Hydrogen Peroxide Detection ◽  
Copper Foam ◽  
Free Hydrogen

Nanoengineered copper foam with 3D free-standing CuO nanowires is used for enhanced pseudocapacitance energy storage and electroanalysis of H2O2.

An enzyme-free hydrogen peroxide sensor based on Ag/FeOOH nanocomposites

2015 ◽  
Vol 7 (5) ◽  
pp. 1788-1793 ◽  
Author(s):  
Jian Zhang ◽  
Jianbin Zheng
Keyword(s):  
Hydrogen Peroxide ◽  
Experimental Procedure ◽  
Hydrogen Peroxide Sensor ◽  
Free Hydrogen

Experimental procedure for the preparation of Ag/FeOOH and the detection of H2O2.

Hydroxyl radicals are not the protagonists of UV-B-induced damage in isolated thylakoid membranes

2007 ◽  
Vol 34 (12) ◽  
pp. 1112 ◽  
Author(s):  
Iva Šnyrychová ◽  
Péter B. Kós ◽  
Éva Hideg
Keyword(s):  
Hydrogen Peroxide ◽  
Electron Transport ◽  
Hydroxyl Radicals ◽  
Early Stage ◽  
D1 Protein ◽  
Photosynthetic Electron Transport ◽  
Thylakoid Membranes ◽  
Oxygen Species ◽  
Free Hydrogen ◽  
By Products

The production of reactive oxygen species (ROS) was studied in isolated thylakoid membranes exposed to 312 nm UV-B irradiation. Hydroxyl radicals (•OH) and hydrogen peroxide were measured directly, using a newly developed method based on hydroxylation of terephthalic acid and the homovanillic acid/peroxidase assay, respectively. At the early stage of UV-B stress (doses lower than 2.0 J cm–2), •OH were derived from superoxide radicals via hydrogen peroxide. Production of these ROS was dependent on photosynthetic electron transport and was not exclusive to UV-B. Both ROS were found in samples exposed to the same doses of PAR, suggesting that the observed ROS are by-products of the UV-B-driven electron transport rather than specific initiators of the UV-B-induced damage. After longer exposure of thylakoids to UV-B, leading to the inactivation of PSII centres, a small amount of •OH was still observed in thylakoids, even though no free hydrogen peroxide was detected. At this late stage of UV-B stress, •OH may also be formed by the direct cleavage of organic peroxides by UV-B. Immunodetection showed that the presence of the observed ROS alone was not sufficient to achieve the degradation of the D1 protein of PSII centres.

An enzyme-free hydrogen peroxide sensor for evaluation of probiotic potential of Enterococcus faecium

2018 ◽  
Vol 273 ◽  
pp. 298-304 ◽  
Author(s):  
Mourad Braik ◽  
Lucian-Gabriel Zamfir ◽  
Lucian Rotariu ◽  
Carmen Curutiu ◽  
Mariana Carmen Chifiriuc ◽  
...  
Keyword(s):  
Hydrogen Peroxide ◽  
Enterococcus Faecium ◽  
Probiotic Potential ◽  
Hydrogen Peroxide Sensor ◽  
Free Hydrogen

Temperature-Induced Bifurcations in the Cu(II)-Catalyzed and Catalyst-Free Hydrogen Peroxide-Thiosulfate Oscillating Reaction

2010 ◽  
Vol 114 (26) ◽  
pp. 7014-7020 ◽  
Author(s):  
Ling Yuan ◽  
Qingyu Gao ◽  
Yuemin Zhao ◽  
Xiaodong Tang ◽  
Irving R. Epstein
Keyword(s):  
Hydrogen Peroxide ◽  
Catalyst Free ◽  
Free Hydrogen ◽  
Oscillating Reaction

scholarly journals Processes for Electrochemical Production of Electrolyte-free Hydrogen Peroxide

Joule ◽  
2019 ◽  
Vol 3 (12) ◽  
pp. 2889-2891 ◽  
Author(s):  
Colin W. Anson ◽  
Shannon S. Stahl
Keyword(s):  
Hydrogen Peroxide ◽  
Free Hydrogen ◽  
Electrochemical Production
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