Abstract: A NOX sensor material includes a composition of Ba(1-X)AXFe(12-Y)BYO19. Constituent A and constituent B are doping elements. Constituent A is selected from the group consisting of Bi, La and Pb and X is a real number where 0?X<1. Constituent B is selected from the group consisting of Al, B, Bi, Ca, Co, Cr, Cu, Er, Ga, In, Mg, Mn, Ni, Nb, Rh, Pb, Si, Sr, Ti, Ta, Zn and Zr and Y is a real number where 0?Y<12. The NOX sensor material may be used in a sensor element of a NOX sensor.

Abstract: A NOX sensor material includes a composition of Ba(1-X)AXFe(12-Y)BYO19. Constituent A and constituent B are doping elements. Constituent A is selected from the group consisting of Bi, La and Pb and X is a real number where 0?X<1. Constituent B is selected from the group consisting of Al, B, Bi, Ca, Co, Cr, Cu, Er, Ga, In, Mg, Mn, Ni, Nb, Rh, Pb, Si, Sr, Ti, Ta, Zn and Zr and Y is a real number where 0?Y<12. The NOX sensor material may be used in a sensor element of a NOX sensor.

Abstract: Disclosed herein is a composition for use in a NOx electrode comprising: Tb(1-x)Ln(x)E(1-y)Q(y1)X(y2)Z(y3)O3 wherein Ln is a lanthanoid or a combination of lanthanoids, E is a metal selected from chromium, iron, and a combination thereof, Q is an element selected from magnesium, calcium, strontium, and a combination thereof, X is an element selected from boron, lead, phosphorus, germanium, and a combination thereof, Z is an element selected from barium, silicon, aluminum, and a combination thereof, x is from 0 to about 0.5, y is from about 0.05 to about 0.8, and y1, y2, y3 are independently from 0 to about 0.8, with the proviso that y=y1+y2+y3, and y2+y3 is greater than 0. Also disclosed are a method of making it, electrodes and sensors comprising it, and a method of detecting NOx.

Abstract: Disclosed herein are electrochemical cells comprising a first electrode, a second electrode, and a solid oxide electrolyte disposed between and in ionic communication with the first electrode and the second electrode. The solid oxide electrolyte comprises the reaction product of a solid oxide electrolyte material, an aliovalent cation dopant, and a sintering aid selected from the group consisting of Al2O3, Ca2Al2O5, and combinations comprising at least one of the foregoing. The electrochemical cells can be utilized water electrolyzers, hydrogen pumps and for various gas sensing cells, SOFCs, and the like.

Abstract: One embodiment of an ammonia gas sensor includes: a reference electrode, an ammonia selective sensing electrode and an electrolyte disposed therebetween. The sensing electrode comprises the reaction product of a main material selected from the group consisting of vanadium, tungsten, molybdenum, vanadium oxides, tungsten oxides, molybdenum oxides, and combinations comprising at least one of the foregoing main materials, and an electrically conducting material selected from the group consisting of electrically conductive metals, electrically conductive metal oxides, and combinations comprising at least one of the foregoing.