摘要:
This invention relates generally to new luminescent materials. Specifically, this invention relates to the discovery of phosphor materials in the forms of A.sub.2 BX.sub.4, ABX.sub.4-y :M and A.sub.3-z B.sub.5 X.sub.12 :M.sub.z. More specifically, this invention relates to the discovery of phosphor materials having compositions of matter in the forms, Sr.sub.2 CeO.sub.4, (Y.sub.0.82 Al.sub.0.07 La.sub.0.06)VO.sub.4 :Eu.sub.0.05 and (Y.sub.0.5 Gd.sub.0.5).sub.2.97 (Al.sub.0.5 Ga.sub.0.5).sub.5 O.sub.12 :CeO.sub.0.03.
摘要:
This invention relates generally to new luminescent materials. Specifically, this invention relates to the discovery of phosphor materials in the forms of A2BX4, ABX4-y:M and A3-zB5X12:Mz. More specifically, this invention relates to the discovery of phosphor materials having compositions of matter in the forms, Sr2CeO4, (Y0.82Al0.07La0.06)VO4:Eu0.05 and (Y0.5Gd0.5)2.97(Al0.5Gd0.5)5O12:Ce0.03.
摘要:
A method and system for the in situ synthesis of a combinatorial library including impregnating a first component with a second component. The method and system advantageously may be employed in the synthesis of materials for screening for usefulness as a catalyst.
摘要:
A fuel cell catalyst comprising platinum, chromium, and copper, nickel or a combination thereof. In one or more embodiments, the concentration of platinum is less than 50 atomic percent, and/or the concentration of chromium is less than 30 atomic percent, and/or the concentration of copper, nickel, or a combination thereof is at least 35 atomic percent.
摘要:
A fuel cell catalyst comprising platinum, titanium and tungsten. In one or more embodiments, the concentration of platinum is less than 60 atomic percent, and/or the concentration of titanium is at least 20 atomic percent, and/or the concentration of tungsten is at least 25 atomic percent.
摘要:
The present invention is directed to a composition for use as a catalyst in, for example, a fuel cell, the composition comprising platinum and copper, wherein the concentration of platinum is greater than 50 atomic percent and less than about 80 atomic percent, and further wherein the composition has a particle size which is less than 35 angstroms. The present invention is further directed to various methods for preparing such a composition.
摘要:
A composition for use as a catalyst in, for example, a fuel cell, the composition comprising platinum, copper and tungsten, or an oxide, carbide and/or salt of one or more of platinum, copper and tungsten, wherein the sum of the concentrations of platinum, copper and tungsten, or an oxide, carbide and/or salt thereof, is greater than 90 atomic percent.