A fuel-saving device includes an oxygen generator adapted for producing oxygen, an air intake component adapted for inhaling air, and a conveyor comprising an output terminal adapted for outputting gas, an oxygen terminal connected with the oxygen generator, an air terminal connected with the air intake component, and a connector connecting the output terminal, the oxygen terminal and the air terminal, so as to allow oxygen from the oxygen generator and air from the air intake component to be mixed and output through the output terminal.

The invention relates to an electrode arrangement (10) for electrochemically treating a liquid. The electrode arrangement (10) has two electrodes (2), each of which has at least one electrode surface (4) and at least one through-flow chamber (34) with at least one inlet (22) and at least one outlet (24). The at least one through-flow chamber (34) is delimited on at least one first face by at least one electrode (2) which has a structure (8) on its electrode surface (4) such that a distance between the electrode surface (4) and a second through-flow chamber (34) face lying opposite the first face is varied. The invention is characterized in that the structure (8) forms at least 30% of the electrode surface (4) and is designed such that the distance between the electrode surface (4) and the second face increases and decreases multiple times along at least one direction, and the liquid flowing through the through-flow chamber (34) is mixed by means of the structure (8) and is set into a turbulent flow in particular.

A treatment device 1 includes: a treatment tank 2; an electrolytic cell 6 including diamond electrodes continuous from a pipe 4 including a circulation pump 5; and a pipe 7 supplying from the electrolytic cell 6 to the treatment tank 2. The treatment tank 2 and the electrolytic cell 6 are filled with sulfuric acid having a predetermined concentration; current is applied to the electrolytic cell 6 to electrolyze the sulfuric acid and a persulfuric acid solution S is generated by electrolyzing the sulfuric acid; and the persulfuric acid solution S is supplied to the treatment tank 2 through the pipe 7. Besides, inside the treatment tank 2, a PPS resin board 8 is vertically suspended in a state of being fixed to a fixture 8A, and the PPS resin board 8 is treated by the persulfuric acid solution S.

Disclosed herein are various layered, carbon-containing materials for use in reducing carbon dioxide. In certain embodiments, the materials comprise single wall carbon nanotubes (SWNTs).

The present invention relates to a catalyst for water splitting consisted of an oxide or a hydroxide that comprises silicon and one or more transition metals selected from a group consisting of Mn, Fe, Co, Ni, and Cu, and is amorphous, and a method of preparing the same.

The present invention relates to a mosquito-killing device, characterized in that it comprises a casing and a control unit; the casing is provided with a first opening for mosquitoes and insects to enter; a carbon dioxide generating device, a fan and an electric grid are provided inside the casing; the control unit controls operation of the carbon dioxide generating device, the fan and the electric grid.

An aromatic dicarboxylic acid of chemical formula HOOCAr.sup.1COOH is prepared in a process wherein a feedstock comprising at least an aromatic aldehyde compound of chemical formula (1): OHCAr.sup.1COOH, wherein Ar.sup.1 represents an arylene or heteroarylene moiety, and an aqueous electrolyte are provided; the feedstock and the aqueous electrolyte are introduced into an electrolytic cell comprising electrodes, wherein at least one of the electrodes comprises a non-noble metal and/or an oxide and/or a hydroxide thereof and/or carbon; and the aromatic aldehyde compound of formula (1) is oxidized electrochemically to yield the aromatic dicarboxylic acid.

Copper-boron-ferrite (CuBFe) composites may be prepared and immobilized on graphite electrodes in a silica-based sol-gel, e.g., from rice husks. Different bimetallic loading ratios can produce fast in-situ electrogeneration of reactive oxygen species, H.sub.2O.sub.2 and .OH, e.g., via droplet flow-assisted heterogeneous electro-Fenton reactor system. Loading ratios of, e.g., 10 to 30 wt. % Fe.sup.3+ and 5 to 15% wt. Cu.sup.2+, can improve the catalytic activities towards pharmaceutical beta blockers (atenolol and propranolol) degradation in water. Degradation efficiencies of at least 99.9% for both propranolol and atenolol in hospital wastewater were demonstrated. Radicals of .OH in degradation indicate a surface mechanism at inventive cathodes with correlated contributions of iron and copper. Copper and iron can be embedded in porous graphite electrode surface and catalyze the conversion of H.sub.2O.sub.2 to .OH to enhance the degradation. Inventive cathodes can be stable catalytically after 20 or more cycles under neutral and acidic conditions.

Compositions comprising hydrogenated and dehydrogenated graphite comprising a plurality of flakes. At least one flake in ten has a size in excess of ten square micrometers. For example, the flakes can have an average thickness of 10 atomic layers or less.

The embodiments provide an electrode catalyst layer for an electrolysis cell, and also an electrolysis cell and a carbon dioxide electrolysis apparatus comprising that layer. The catalyst layer has a controlled porous structure, and can realize a high partial current density. The catalyst layer of the embodiment comprises carbonous catalyst carriers, a metallic catalyst loaded on the carriers, and an ion-conductive material. The catalyst layer contains pores of 5 to 200 m diameters, and the pores have a volume per weight of the catalyst layer in the range of 3.0 to 10 mL/g in total.