Abstract: A catalyst layer comprising an electrocatalyst and an oxygen evolution catalyst, wherein the oxygen evolution catalyst comprises a crystalline metal oxide comprising: (i) one of more first metals selected from the group consisting of yttrium, lanthanum, cerium, praseodymium, neodymium, promethium, samarium, europium, gadolinium, terbium, dysprosium, holmium, erbium, thulium, ytterbium, lutetium, magnesium, calcium, strontium, barium, sodium, potassium, indium, thallium, tin, lead, antimony and bismuth; (ii) one or more second metals selected from the group consisting of Ru, Ir, Os and Rh; and (iii) oxygen characterised in that: (a) the atomic ratio of first metal(s):second metal(s) is from 1:1.5 to 1.5:1 (b) the atomic ratio of (first metal(s)+second metal(s)):oxygen is from 1:1 to 1:2 is disclosed.

Abstract: A catalyst layer including an electrocatalyst and an oxygen evolution catalyst, wherein the oxygen evolution catalyst includes a crystalline metal oxide including: (i) one of more first metals selected from the group consisting of yttrium, lanthanum, cerium, praseodymium, neodymium, promethium, samarium, europium, gadolinium, terbium, dysprosium, holmium, erbium, thulium, ytterbium, lutetium, magnesium, calcium, strontium, barium, sodium, potassium, indium, thallium, tin, lead, antimony and bismuth; (ii) one or more second metals selected from the group consisting of Ru, Ir, Os and Rh; and (iii) oxygen characterized in that: (a) the atomic ratio of first metal(s):second metal(s) is from 1:1.5 to 1.5:1 (b) the atomic ratio of (first metal(s)+second metal(s)):oxygen is from 1:1 to 1:2 is disclosed.

Abstract: Catalysts and articles useful for selective catalytic reduction (SCR) are disclosed. The catalyst comprises a cerium oxide and an octahedral molecular sieve (OMS) comprising manganese oxide. The catalysts, which comprise 0.1 to 50 wt. % of cerium, can be made by doping, ion-exchange, deposition, or other techniques. Also disclosed is an SCR process in which a gaseous mixture comprising nitrogen oxides is selectively reduced in the presence of a reductant and the cerium-modified OMS catalyst. The cerium-modified manganese oxide OMS catalysts offer unexpected advantages for selective catalytic reduction, especially NH3-SCR, including improved thermal stability and improved activity for NOx conversion, especially at relatively low temperatures (100° C. to 250° C.).

Abstract: Niobia- and tantala-doped ceria catalysts, their use in selective catalytic reduction (SCR) processes, and a compact after-treatment system for exhaust gases are disclosed. In some aspects, the catalyst comprises at least 91 wt. % of ceria and 0.1 to 9 wt. % of niobia or tantala doped on the ceria. While conventional SCR catalysts can deactivate at higher temperatures, the doped cerias, particularly ones having as little as 1 or 2 wt. % of Nb2O5 or Ta2O5, are activated toward NOx conversion by calcination. The doped cerias are also valuable for SCRF® catalyzed filter applications, including an after-treatment system that comprises a diesel particulate filter having inlets and outlets, and a dual-function catalyst coated on the inlets, outlets, or both. Compared with conventional SCR catalysts, the niobia or tantala-doped cerias enable a higher level of NO2 to be present.

Abstract: Catalysts and articles useful for selective catalytic reduction (SCR) are disclosed. The catalyst comprises a cerium oxide and an octahedral molecular sieve (OMS) comprising manganese oxide. The catalysts, which comprise 0.1 to 50 wt. % of cerium, can be made by doping, ion-exchange, deposition, or other techniques. Also disclosed is an SCR process in which a gaseous mixture comprising nitrogen oxides is selectively reduced in the presence of a reductant and the cerium-modified OMS catalyst. The cerium-modified manganese oxide OMS catalysts offer unexpected advantages for selective catalytic reduction, especially NH3-SCR, including improved thermal stability and improved activity for NOx conversion, especially at relatively low temperatures (100° C. to 250° C.).

Abstract: Catalysts and articles useful for selective catalytic reduction (SCR) and other exhaust gas treatments are disclosed. The catalysts comprise an octahedral molecular sieve (OMS) comprising manganese oxide and an aluminosilicate and/or silicoaluminophosphate large-pore or medium-pore molecular sieve.

Abstract: A sol includes metal oxide nanoparticles and stabilizer ions dispersed in an aqueous liquid. The nanoparticles include a metal selected from the group of platinum, palladium, rhodium, iridium, ruthenium and osmium and the molar ratio of metal: stabilizer ions is at least 0.7. A method of preparing supported catalyst materials includes contacting the sols with support materials.

Abstract: Niobia- and tantala-doped ceria catalysts, their use in selective catalytic reduction (SCR) processes, and a compact after-treatment system for exhaust gases are disclosed. In some aspects, the catalyst comprises at least 91 wt. % of ceria and 0.1 to 9 wt. % of niobia or tantala doped on the ceria. While conventional SCR catalysts can deactivate at higher temperatures, the doped cerias, particularly ones having as little as 1 or 2 wt. % of Nb2O5 or Ta2O5, are activated toward NOx conversion by calcination. The doped cerias are also valuable for SCRF® catalyzed filter applications, including an after-treatment system that comprises a diesel particulate filter having inlets and outlets, and a dual-function catalyst coated on the inlets, outlets, or both. Compared with conventional SCR catalysts, the niobia or tantala-doped cerias enable a higher level of NO2 to be present.

Abstract: An emission control catalyst composition comprising a supported bimetallic catalyst consisting of gold and a metal selected from the group consisting of platinum, rhodium, ruthenium, copper and nickel is disclosed. Also disclosed is a catalytic convertor comprising a substrate monolith coated with the emission control catalyst composition and a lean burn internal combustion engine exhaust gas emission treatment system comprising the catalytic convertor. A variety of processes for preparing the catalyst composition are claimed.

Abstract: Provided is a catalyst composition having an aluminosilicate molecular sieve having an AEI structure and a mole ratio of silica-to-alumina of about 20 to about 30 loaded with about 1 to about 5 weight percent of a promoter metal, based on the total weight of the molecular sieve material. Also provided are method, articles, and systems utilizing the catalyst composition.

Abstract: An emission control catalyst composition comprising a supported bimetallic catalyst consisting of gold and a metal selected from the group consisting of platinum, rhodium, ruthenium, copper and nickel is disclosed. Also disclosed is a catalytic convertor comprising a substrate monolith coated with the emission control catalyst composition and a lean burn internal combustion engine exhaust gas emission treatment system comprising the catalytic convertor. A variety of processes for preparing the catalyst composition are claimed.

Abstract: A catalyst layer including an electrocatalyst and an oxygen evolution catalyst, wherein the oxygen evolution catalyst includes a crystalline metal oxide including: (i) one of more first metals selected from the group consisting of yttrium, lanthanum, cerium, praseodymium, neodymium, promethium, samarium, europium, gadolinium, terbium, dysprosium, holmium, erbium, thulium, ytterbium, lutetium, magnesium, calcium, strontium, barium, sodium, potassium, indium, thallium, tin, lead, antimony and bismuth; (ii) one or more second metals selected from the group consisting of Ru, Ir, Os and Rh; and (iii) oxygen characterised in that: (a) the atomic ratio of first metal(s):second metal(s) is from 1:1.5 to 1.5:1 (b) the atomic ratio of (first metal(s)+second metal(s)):oxygen is from 1:1 to 1:2 is disclosed.

Abstract: An apparatus (10) comprising a lean burn internal combustion engine (12) and an exhaust system (14) comprising at least one catalytic aftertreatment component (18, 20, 22), wherein the at least one catalytic aftertreatment component comprises a catalyst composition comprising an alloy consisting of palladium and gold on a metal oxide support.

Abstract: A platinum alloy catalyst PtX, wherein the atomic percent of platinum in the bulk alloy is from 5 to 50 at %, the remaining being X, characterised in that the atomic percent of platinum at the surface of the alloy is from 10 to 80 at %, the remainder being X, provided that the at % of platinum at the surface of the alloy is at least 25% greater than the at % of platinum in the bulk alloy is disclosed.

Abstract: An electrocatalyst, suitable for use in a fuel cell, comprises an alloy having a single crystalline phase, wherein the alloy consists of 5-95 at % palladium, 5-95 at % ruthenium and less than 10 at % of other metals, provided that the alloy does not consist of 50 at % palladium and 50 at % ruthenium.

Abstract: An apparatus (10) comprising a lean burn internal combustion engine (12) and an exhaust system (14) comprising at least one catalytic aftertreatment component (18, 20, 22), wherein the at least one catalytic aftertreatment component comprises a catalyst composition comprising an alloy consisting of palladium and gold on a metal oxide support.

Abstract: A platinum alloy catalyst PtX, wherein the atomic percent of platinum in the bulk alloy is from 5 to 50 at %, the remaining being X, characterised in that the atomic percent of platinum at the surface of the alloy is from 10 to 80 at %, the remainder being X, provided that the at % of platinum at the surface of the alloy is at least 25% greater than the at % of platinum in the bulk alloy is disclosed.

Abstract: A compound of formula (Na0.33A0.66)2B2O7-? wherein A is one or more metals chosen from the lanthanide metals; B is one or more metals chosen from Ti, Sn, Ge, Ru, Mn, Ir, Os and Pb; and ? is a number in the range 0-1 is disclosed. Water gas shift catalysts comprising precious metals such as gold dispersed on the (Na0.33A0.66)2B2O7-? compound are also disclosed.

Abstract: An electrocatalyst, suitable for use in a fuel cell, comprises an alloy having a single crystalline phase, wherein the alloy consists of 5-95 at % palladium, 5-95 at % ruthenium and less than 10 at % of other metals, provided that the alloy does not consist of 50 at % palladium and 50 at % ruthenium.

Abstract: A three-way catalyst (TWC) composition comprises a manganese-containing oxygen storage component (OSC) and at least one optionally doped alumina wherein where the at least one alumina is gamma-alumina it is doped with at least one of a rare earth metal, silicon, germanium, phosphorus, arsenic, calcium, strontium or barium.