A nanostructured metal oxide composition comprising hydroxides or oxygen vacancies or both hydroxides and oxygen vacancies on its surface is described. A process for preparing the nanostructured metal oxide composition comprising hydroxides or oxygen vacancies or both hydroxides and oxygen vacancies on its surface, which hydroxides and oxygen vacancies can participate in chemical reactions, which composition is prepared by a method selected from the group of methods comprising: i) controlled thermally induced dehydroxylation of nanostructured metal hydroxide precursors; ii) thermochemical reaction of said nanostructured metal oxide with hydrogen gas; iii) vacuum thermal treatment of said nanostructured metal oxide; and iv) aliovalent doping with a lower oxidation state metal. A photocatalyst comprising a nanostructured metal oxide composition comprising an optimal loading of hydroxides or oxygen vacancies or both hydroxides and oxygen vacancies on its surface, which hydroxides and/or oxygen vacancies can participate in chemical or physical reactions.

There is provided a honeycomb type heating device including: a pillar-shaped honeycomb substrate having a partition wall defining a plurality of cells extending from one end face to the other end face and a circumferential wall surrounding the partition wall; a plurality of heaters adjacently arranged on a circumferential face that is an outside surface of the circumferential wall in a circumferential direction of the circumferential face; and intermediate members interposed between the circumferential face of the honeycomb substrate and the plurality of heaters. The sum of areas of portions of the circumferential face covered with the intermediate members between the circumferential face of the honeycomb substrate and the plurality of heaters is 20 to 100% of the sum of areas of portions of the circumferential face covered with the plurality of heaters.

Provided is a solid acid catalyst for use in oxidation of a substrate in the coexistence of oxygen and ozone (solid acid catalyst for oxygen-ozone-coexisting oxidation). The solid acid catalyst enables oxidation of the substrate with a high conversion. This solid acid catalyst for oxygen-ozone-coexisting oxidation is a solid acid catalyst for use in an oxidation reaction to oxidize a substrate (A) in the coexistence of oxygen and ozone. The solid acid catalyst includes a transition metal in the form of an elementary substance, a compound, or an ion, and a support supporting the transition metal. The support includes, at least in its surface, a strong acid or super strong acid having a Hammett acidity function (H.sub.0) of −9 or less. The support is preferably a pellet or particle made of a fluorinated sulfonic acid resin, or a support including a solid and a layer of a fluorinated sulfonic acid resin disposed on the solid.

The invention is directed to a catalyst, to a method for manufacturing a catalyst, to a method for manufacturing a bisphenol compound, and to the use of a catalyst. The catalyst of the invention comprises particles having a core and a shell, wherein the shell comprises an ion exchange resin covering the core at least in part and wherein the core has a density that is higher than the density of the ion exchange resin.

The invention relates to a wall-flow filter, to a method for the production and the use of the filter for reducing harmful exhaust gases of an internal combustion engine. The wall-flow filter was produced by exposing the filter at least twice successively to a powder-gas aerosol.

Disclosed herein are a dehydrogenation catalyst having single-atom cobalt loaded onto a silica support that has undergone pretreatment including a thermal treatment and a high-temperature aqueous treatment (reaction), a preparation method therefor, and a method for producing olefins by dehydrogenating corresponding paraffins, particularly light paraffins in the presence of the dehydrogenation catalyst.

The invention relates to a method for converting a gas into methane (CH.sub.4) which includes: a step of activating a catalytic material including praseodymium oxide (Pr.sub.6O.sub.11) associated with nickel oxide (NiO) and alumina (Al.sub.2O.sub.3), the respective proportions of which are, relative to the total mass of these three compounds: Pr.sub.6O.sub.11: 1 wt % to 20 wt %, NiO: 1 wt % to 20 wt %, and Al.sub.2O.sub.3: 60 to 98 wt %; and a step of passing a gas including at least one carbon monoxide (CO) over the activated catalytic material.

The present disclosure is directed to compositions for use in oxygen capture applications, for example in three-way catalysts (TWC) systems. In some embodiments, the compositions comprise composites of aggregated and/or fused primary particles, the aggregated and/or fused primary particles collectively having the formulae [MnO.sub.x]:.sub.y:[La.sub.zMnO.sub.3].sub.1-y; wherein x is in a range from about 1 to 2.5; y is in a range from about 1 to about 30 wt %, or from about 1 to about 20 wt % or from about 2-10 wt % or from about 2 to about 5 wt %; and z is about 0.7 to about 1.1; and the La.sub.zMnO.sub.3 is a crystalline perovskite phase; the aggregated and/or fused primary particles of the composite having a mean surface area in a range of from about 25 to about 60 m.sup.2/g, preferably from about 27 to about 45 m.sup.2/g. In preferred embodiments, these compositions further comprise low levels of at least one platinum group metal (PGM), preferably Pd.

The present invention discloses a bismuth oxide (Bi.sub.2O.sub.3)/bismuth subcarbonate ((BiO).sub.2CO.sub.3)/bismuth molybdate (Bi.sub.2MoO.sub.6) composite photocatalyst, including a Bi.sub.2MoO.sub.6 photocatalyst, where Bi.sub.2O.sub.3 and (BiO).sub.2CO.sub.3 nanosheets are introduced to a surface of the Bi.sub.2MoO.sub.6 through addition of Na.sub.2CO.sub.3 and roasting. The present invention also discloses a preparation method of the Bi.sub.2O.sub.3/(BiO).sub.2CO.sub.3/Bi.sub.2MoO.sub.6 composite photocatalyst which is specifically implemented by the following steps: step 1: preparing a Bi.sub.2MoO.sub.6 photocatalyst; step 2: introducing Bi.sub.2O.sub.3 and (BiO).sub.2CO.sub.3 nanosheets to a surface of the Bi.sub.2MoO.sub.6 photocatalyst obtained in step 1 through addition of Na.sub.2CO.sub.3 and roasting to obtain the Bi.sub.2O.sub.3/(BiO).sub.2CO.sub.3/Bi.sub.2MoO.sub.6 composite photocatalyst. The photocatalyst of the present invention has no agglomeration, a wide responsive range of visible light, a significantly improved catalytic activity compared with a Bi.sub.2MoO.sub.6 alone, and excellent reusability. Moreover, the preparation method is simple with mild conditions, desired controllability and convenient operation.

A nanocatalyst including single atoms of platinum dispersed on a nanoscale metal oxide, and the nanocatalyst comprises 0.01 wt % to 1 wt % platinum. Preparing the nanocatalyst includes combining a solution comprising a nanoscale metal oxide and a compound containing a Group 10 metal to yield a mixture, aging the mixture for a length of time, filtering the mixture to yield a solid, washing the solid to eliminate water soluble anions, and calcining the solid to yield a nanocatalyst including single atoms or clusters of atoms of the Group 10 metal on the nanoscale metal oxide.