A spin-coated TiOx/Pt nanolayered anodic catalyst for the direct formic acid fuel cells

Publication date: Available online 18 November 2019Source: Arabian Journal of ChemistryAuthor(s): Islam M. Al-Akraa, Ahmad M. MohammadAbstractThe CO poisoning of the platinum anodic catalyst which typically functions the catalytic deterioration of the direct formic acid fuel cells could be minimized with a simple modification for Pt with titanium oxide. The fabrication scheme involved the spin-coating of a Ti precursor onto a Pt thin layer that was physically sputtered onto a Si substrate. The whole assembly was subjected to a post-annealing processing to produce the TiOx layer (60 nm) in a porous structure (mostly Anatase) atop of the Pt surface. The porous nature of the TiOx layer permitted the participation of Pt in the electrocatalysis of the formic acid electro−oxidation (FAO). The annealing temperature was critical in identifying the catalytic efficiency and durability of the catalyst toward the FAO. Interestingly, if compared to bare-Pt substrates, the TiOx-modified catalysts could successfully steer the FAO toward the direct dehydrogenation (favorable and less energetic) pathway with more than an order of magnitude increase in the catalytic activity. It also provided a great opportunity for the mitigation of poisoning CO; concurrently with a lowering (∼ 0.3 V) in the onset potential of the FAO. The scanning electron microscopy (SEM), energy dispersive X-ray spectroscopy (EDS), X-ray diffraction spectroscopy (XRD), cyclic voltammetry (CV) and electrochemical ...
Source: Arabian Journal of Chemistry - Category: Chemistry Source Type: research

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In this study, we describe two new species of Gambierdiscus isolated from Heron Island in the Southern Great Barrier Reef, Queensland, Australia. These new species were analysed using light microscopy, scanning electron microscopy, and phylogenetic analyses of nuclear encoded ribosomal ITS, SSU as well as D1-D3 and D8-D10 of the LSU gene regions. Gambierdiscus lewisii sp. nov. (Po, 3', 0a, 7'', 6c,? s, 5''', 0p, 2'''') is distinguished by its strong reticulate-foveate ornamentation and is genetically distinct from its sister species, G. pacificus. Gambierdiscus holmesii sp. nov. (Po, 3', 0a, 7'', 6c, 6s?, 5''', 0p, 2'''') ...
Source: Protist - Category: Molecular Biology Source Type: research
CONCLUSIONS: Longitudinally, microstructural changes were inconsistent in WM and GM with time after acute carbon monoxide poisoning. Diffusional kurtosis imaging metrics provided important complementary information to quantify the damage to cognitive impairment.
Source: American Journal of Neuroradiology - Category: Radiology Authors: Tags: FUNCTIONAL Source Type: research
Publication date: January 2020Source: LWT, Volume 117Author(s): Darla Silveira Volcan Maia, Louise Haubert, Isabela Schneid Kroning, Kauana dos Santos Soares, Thaís Larré Oliveira, Wladimir Padilha da SilvaAbstractThe aims of this study were to verify the ability of S. aureus isolates from food poisoning outbreaks to form biofilm, and evaluate the susceptibility of these isolates to Butia odorata extract (BOE) and its effect on S. aureus biofilm. All 13 S. aureus isolates formed biofilm on polystyrene; and 84.6% (11/13) carried icaA and icaB genes, 69.2% (9/13) the icaD gene, and 61.5% (8/13) the icaC gene. A...
Source: LWT Food Science and Technology - Category: Food Science Source Type: research
Two cases where elemental mercury was intentionally added to the victim's food are briefly described. Elemental mercury may be identified by using a combination of physical properties (appearance and specific gravity) and elemental analysis (scanning elect...
Source: SafetyLit - Category: International Medicine & Public Health Tags: Poisoning Source Type: news
Discussion Drawing conclusions on the causation of adverse health effects by environmental chemicals can have important societal consequences, leading to policy-making which can control, limit or even prevent the exposure to the pollutant through regulation and litigation. There are critical lessons to be learned from the Monsanto saga. The whole process of evidence-informed policy-making is under threat. The case of glyphosyte is by no means over; further research is needed to cover the knowledge gaps, but this should be done independently and with full transparency. The IARC Monographs provide the scientific evaluation ...
Source: Scandinavian Journal of Work, Environment and Health - Category: Occupational Health Tags: Commentary Source Type: research
Discussion Drawing conclusions on the causation of adverse health effects by environmental chemicals can have important societal consequences, leading to policy-making which can control, limit or even prevent the exposure to the pollutant through regulation and litigation. There are critical lessons to be learned from the Monsanto saga. The whole process of evidence-informed policy-making is under threat. The case of glyphosyte is by no means over; further research is needed to cover the knowledge gaps, but this should be done independently and with full transparency. The IARC Monographs provide the scientific evaluation o...
Source: Scandinavian Journal of Work, Environment and Health - Category: Occupational Health Authors: Tags: Scand J Work Environ Health Source Type: research
Publication date: Available online 19 July 2019Source: Inorganica Chimica ActaAuthor(s): Nagaraj Anbu, Amarajothi DhakshinamoorthyAbstractIn this work, a well known metal organic framework, Cu3(BTC)2 (BTC: 1,3,5-benzenetricarboxylate) is reported as a heterogeneous solid catalyst for the reduction of styrene and its derivatives with silane as a reducing agent. Under these reaction conditions, a quantitative conversion of styrene is achieved to with very high selectivity to ethylbenzene. A control experiment with pyridine as a catalyst poison revealed that Cu2+ located within the framework plays a crucial role in promoting ...
Source: Inorganica Chimica Acta - Category: Chemistry Source Type: research
ng Lijun Li The detection of difenidol hydrochloride, which is a drug that is widely used for treating the nausea and vomiting symptoms caused by certain diseases, has been increasingly involved in cases of suicide via overdosing and of drug poisoning in children. A novel electrochemiluminescence (ECL) sensor for the simple and effective detection of difenidol hydrochloride was fabricated by modifying a glassy carbon electrode with three-dimensional carbon nanofibers (3D-CNFs). The 3D-CNFs were synthesized by electrospinning a mixture of montmorillonite (MMT) and polyacrylonitrile, carbonizing the electrospun product...
Source: Sensors - Category: Biotechnology Authors: Tags: Article Source Type: research
Publication date: September 2019Source: Journal of Trace Elements in Medicine and Biology, Volume 55Author(s): Nasim Zamani, Hossein Hassanian-Moghaddam, Hooman Bahrami-Motlagh, Sara Ahmadi, Scott PhillipsAbstractObjectivesOur study attempts to determine if for patients following ingestion of lead-contaminated opium, radiographs [plain X-ray (KUB)] or unenhanced computed tomography (CT scan) of the abdomen may be predictive of lead poisoning.MethodsOur study is concerned with patients of>21 years with elevated lead concentrations, who had undergone KUB or CT. Patients with other toxicities who had undergone similar imag...
Source: Journal of Trace Elements in Medicine and Biology - Category: Biochemistry Source Type: research
Publication date: Available online 25 April 2019Source: Journal of Trace Elements in Medicine and BiologyAuthor(s): Nasim Zamani, Hossein Hassanian-Moghaddam, Hooman Bahrami-Motlagh, Sara Ahmadi, Scott PhillipsAbstractObjectivesOur study attempts to determine if for patients following ingestion of lead-contaminated opium, radiographs (plain X-ray (KUB)) or unenhanced computed tomography (CT scan) of the abdomen may be predictive of lead poisoning.MethodsOur study is concerned with patients of>21 years with elevated lead concentrations, who had undergone KUB or CT. Patients with other toxicities who had undergone similar...
Source: Journal of Trace Elements in Medicine and Biology - Category: Biochemistry Source Type: research
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