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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AbstractAt about 13,000 calendar years before present (BP) the Laacher See volcano, located in present ‐day western Germany, erupted catastrophically. It has been argued that this eruption and its attendant ash fallout played a causal role in the demographic and cultural change documented archaeologically amongst contemporaneous human hunter–gatherer populations in northern Europe. The population displacement and subsequent changes in material culture are clearly visible in the archaeological record, especially in southern Scandinavia. A particular challenge to this scenario is the apparently paradoxical propositio...
Source: International Journal of Osteoarchaeology - Category: Science Authors: Tags: RESEARCH ARTICLE Source Type: research
AbstractAt about 13,000 calendar years before present (BP) the Laacher See volcano, located in present ‐day western Germany, erupted catastrophically. It has been argued that this eruption and its attendant ash fallout played a causal role in the demographic and cultural change documented archaeologically amongst contemporaneous human hunter‐gatherer populations in northern Europe. The population displacement and subsequent changes in material culture are clearly visible in the archaeological record, especially in southern Scandinavia. A particular challenge to this scenario is the apparently paradoxical proposition th...
Source: International Journal of Osteoarchaeology - Category: Science Authors: Tags: RESEARCH ARTICLE Source Type: research
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Source: European Journal of Applied Physiology - Category: Physiology Source Type: research
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Source: International Journal of Medical Microbiology - Category: Microbiology Authors: Tags: Int J Med Microbiol Source Type: research
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Source: Molecular and Cellular Toxicology - Category: Cytology Source Type: research
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