摘要:
A method of operating a fuel cell having an anode, a cathode and a polymer electrolyte membrane disposed between the anode and the cathode, includes feeding the anode with an impure hydrogen stream having low levels of carbon monoxide up to 5 ppm, and wherein the anode includes an anode catalyst layer including a carbon monoxide tolerant catalyst material, wherein the catalyst material includes: (i) a binary alloy of PtX, wherein X is a metal selected from the group consisting of rhodium and osmium, and wherein the atomic percentage of platinum in the alloy is from 45 to 80 atomic % and the atomic percentage of X in the alloy is from 20 to 55 atomic %; and (ii) a support material on which the PtX alloy is dispersed; wherein the total loading of platinum group metals (PGM) in the anode catalyst layer is from 0.01 to 0.2 mgPGM/cm2.
摘要:
Multilayer substrates for the growth and/or support of CNT arrays are provided. These multilayer substrates both promote the growth of dense vertically aligned CNT arrays and provide excellent adhesion between the CNTs and metal surfaces. Carbon nanotube arrays formed using multilayer substrates, which exhibit high thermal conductivity and excellent durability, are also provided. These arrays can be used as thermal interface materials.
摘要:
Provided is a photocatalytic composition comprising zinc (Zn) doped titanium dioxide (TiO2) nanoparticles, wherein the ratio of titanium dioxide nanoparticles to zinc is from about 5 to about 150. The photocatalytic composition absorbs electromagnetic radiation in a wavelength range from about 200 nm to about 500 nm, and the absorbance of light of wavelengths longer than about 450 nm is less than 50% the absorbance of light of wavelengths shorter than about 350 nm.
摘要:
The purpose of the present invention is to provide a catalyst for exhaust gas purification, which is capable of effectively processing an exhaust gas, particularly carbon monoxide (CO) and hydrocarbon (HC) in the exhaust gas at a low temperature, and a method for producing the catalyst for exhaust gas purification. The purpose is achieved by a catalyst for exhaust gas purification, which is obtained by having a carrier that contains Al2O3 and one or more metal oxides selected from the group consisting of zirconium oxide (ZrO2), cerium oxide (CeO2), yttrium oxide (Y2O3), neodymium oxide (Nd2O3), silicon oxide (SiO2) and titanium oxide (TiO2) support one or more catalyst components selected from the group consisting of gold (Au), silver (Ag), platinum (Pt), palladium (Pd), rhodium (Rh), iridium (Ir), ruthenium (Ru) and osmium (Os). The metal oxides have particle diameters of less than 10 nm.
摘要翻译:本发明的目的是提供一种排气净化用催化剂,其能够在低温下有效地处理排气中的废气,特别是一氧化碳(CO)和烃(HC) 生产废气净化催化剂。 其目的是通过具有含有Al 2 O 3的载体和选自氧化锆(ZrO 2),氧化铈(CeO 2),氧化钇(Y 2 O 3)等的一种以上的金属氧化物而得到的废气净化用催化剂实现。 ),氧化钕(Nd 2 O 3),氧化硅(SiO 2)和氧化钛(TiO 2)支持一种或多种选自金(Au),银(Ag),铂(Pt),钯(Pd) ,铑(Rh),铱(Ir),钌(Ru)和锇(Os)。 金属氧化物的粒径小于10nm。
摘要:
Disclosed is a one step process for making of 1,1,1,4,4,4-hexafluoro-2-butene. More specifically, the present invention provides a process for making hexafluoro-2-butene, continuously, from 2-chloro-3,3,3-trifluoropronene using Fe2O3/NiO impregnated carbon catalyst at 600° to 650° C.
摘要翻译:公开了制备1,1,1,4,4,4-六氟-2-丁烯的一步法。 更具体地说,本发明提供了使用Fe 2 O 3 / NiO浸渍的碳催化剂在600℃至650℃下从2-氯-3,3,3-三氟丙烯连续制备六氟-2-丁烯的方法。
摘要:
Multilayer substrates for the growth and/or support of CNT arrays are provided. These multilayer substrates both promote the growth of dense vertically aligned CNT arrays and provide excellent adhesion between the CNTs and metal surfaces. Carbon nanotube arrays formed using multilayer substrates, which exhibit high thermal conductivity and excellent durability, are also provided. These arrays can be used as thermal interface materials.
摘要:
The purpose of the present invention is to provide a catalyst for exhaust gas purification, which is capable of effectively processing an exhaust gas, particularly carbon monoxide (CO) and hydrocarbon (HC) in the exhaust gas at a low temperature, and a method for producing the catalyst for exhaust gas purification. The purpose is achieved by a catalyst for exhaust gas purification, which is obtained by having a carrier that contains Al2O3 and one or more metal oxides selected from the group consisting of zirconium oxide (ZrO2), cerium oxide (CeO2), yttrium oxide (Y2O3), neodymium oxide (Nd2O3), silicon oxide (SiO2) and titanium oxide (TiO2) support one or more catalyst components selected from the group consisting of gold (Au), silver (Ag), platinum (Pt), palladium (Pd), rhodium (Rh), iridium (Ir), ruthenium (Ru) and osmium (Os). The metal oxides have particle diameters of less than 10 nm.
摘要翻译:本发明的目的是提供一种排气净化用催化剂,其能够在低温下有效地处理排气中的废气,特别是一氧化碳(CO)和烃(HC) 生产废气净化催化剂。 其目的是通过具有含有Al 2 O 3的载体和选自氧化锆(ZrO 2),氧化铈(CeO 2),氧化钇(Y 2 O 3)等的一种以上的金属氧化物而得到的废气净化用催化剂实现。 ),氧化钕(Nd 2 O 3),氧化硅(SiO 2)和氧化钛(TiO 2)支持一种或多种选自金(Au),银(Ag),铂(Pt),钯(Pd) ,铑(Rh),铱(Ir),钌(Ru)和锇(Os)。 金属氧化物的粒径小于10nm。
摘要:
A carrier for carrying an osmium oxide comprising an aromatic polyolefin polymer having a group shown by the general formula [1] as a substituent on the aromatic ring of said polyolefin polymer: —A′—O(—A—O)n—R[1] (wherein A is an alkylene group; A′ is a direct link or an alkylene group; R is an aryl group; and n is an integer of 1 to 10), an osmium oxide carried by the carrier for carrying an osmium oxide and a method for producing the osmium oxide carried by said carrier are disclosed. Since the osmium oxide carried by the carrier of the present invention has a hydrophilic group, in an oxidation reaction and an asymmetric oxidation reaction, particularly in a heterogeneous solvent system, the osmium oxide carried by the carrier of the present invention enables to produce a diol compound easily and in a high optical yield.
摘要:
The present invention relates to novel hexacoordinated metathesis catalysts and to methods for making and using the same. The inventive catalysts are of the formula wherein: M is ruthenium or osmium; X and X1 are the same or different and are each independently an anionic ligand; L, L1′ and L2 are the same or different and are each independently a neutral electron donor ligand; and, R and R1 are each independently hydrogen or a substituent selected from the group consisting of C1-C20 alkyl, C2-C20 alkenyl, C2-C20 alkynyl, aryl, C1-C20 carboxylate, C1-C20 alkoxy, C2-C20 alkenyloxy, C2-C20 alkynyloxy, aryloxy, C2-C20 alkoxycarbonyl, C1-C20 alkylthio, C1-C20 alkylsulfonyl and C1-C20 alkylsulfinyl and silyl. Optionally, each of the R or R1 substituent group may be substituted with one or more moieties selected from the group consisting of C1-C10 alkyl, C1-C10 alkoxy, and aryl which in turn may each be further substituted with one or more groups selected from a halogen, a C1-C5 alkyl, C1-C5 alkoxy, and phenyl. Moreover, any of the catalyst ligands may further include one or more functional groups. Examples of suitable functional groups include but are not limited to: hydroxyl, thiol, thioether, ketone, aldehyde, ester, ether, amine, imine, amide, nitro, carboxylic acid, disulfide, carbonate, isocyanate, carbodiimide, carboalkoxy, carbamate, halogen, alcohol, sulfonic acid, phosphine, imide, acetal, ketal, boronate, cyano, cyanohydrin, hydrazine, enamine, sulfone, sulfide, and sulfenyl. In certain embodiments, at least one of L, L1′ and L2 is an N-heterocyclic carbene ligand.
摘要:
The present invention provides a supported osmate useful as a reusable catalyst in the preparation of vicinal diols. The present invention also relates to a process for the preparation of supported osmates of the formula (S—NR3)2OsO4.nH2O wherein S is a support, R is an alkyl group, n is the number of water molecules and use thereof in the preparation of vicinal diols by asymmetric dihydroxylation (AD) of olefins in presence of cinchona alkaloid compounds.