Abstract:
The present teachings are directed toward electrocatalyst compositions of platinum, titanium and at least a third metal for use in fuel cells. The electrocatalyst composition is composed essentially of platinum present in an atomic percentage ranging between about 55 percent and about 85 percent, titanium present in an atomic percentage ranging between about 1 percent and about 30 percent, and at least a third metal present in an atomic percentage ranging between about 1 percent and about 30 percent. The third metal can be at least one member selected from the group consisting of nickel, vanadium and molybdenum.
Abstract:
The present teachings are directed toward electrocatalyst composition of an alloy of platinum and tungsten for use in fuel cells. The alloy consists essentially of platinum metal present in an atomic percentage ranging between about 20 percent and about 50 percent, and tungsten metal present in an atomic percentage ranging between about 50 percent and about 80 percent.
Abstract:
There is provided a method of preparing carbon supported, ternary alloy composition core-shell PtVFe nanoparticles for use as fuel cell electrocatalysts. These catalysts have been found particularly useful for oxygen reduction reactions. The alloy nanoparticles can be assembled on carbon supports which then may undergo subsequent activation and/or calcination treatments. The method, combined with new synthetic feed and processing conditions, provides core-shell PtVFe alloy nanoparticles of 1–3 nm size. The catalyst-produced high monodispersity, controlled composition are highly dispersed, and have a uniform distribution. Finally, the correlation of the preparation and treatment parameters to the ORR catalytic activities of the prepared nanoparticles is described. The catalysts exhibit ORR in the range of 2 to 4 times more than a standard Pt/carbon catalyst.
Abstract:
The present teachings are directed toward single metal and alloy nanoparticles and synthesis methods for preparing single metal and alloy nanoparticles.
Abstract:
A holder for maintaining substrates in an array during a high throughput materials deposition comprising a face plate, middle plate and retainer plate attached in sequence and aligned in an axis in which a plurality of cylindrical substrates are maintained in cylindrical chambers formed in an array with respect to the face surface of the block assembly. A spring loading mechanism positions the substrates within the chambers during the processing of the substrates, the substrates are removable from the holder after the completion of processing.
Abstract:
An electrochemical cell assembly including a plurality of testing cells, a reference cell, and fluid connections between the testing cells and the reference cell. Each of the testing cells includes a working electrode, which is a rotating disk or ring-disk electrode, and a counter electrode. A chemical composition, whose intrinsic kinetic properties under defined mass-transfer are to be investigated, is deposited on the working electrode. The reference cell holds a reference electrode that serves as a common reference electrode for each of the testing cells. The assembly permits simultaneous testing of many chemical compositions under identical environment.
Abstract:
A layer manager provides at least two content layers within a user interface window of a software application. A tab manager provides at least two content tabs within at least one of the content layers. A transfer manager is configured to transfer at least one content tab between the at least two content layers.
Abstract:
Methods, compositions and devices relate to photovoltaic cells having a photoactive layer and constituents synthesized and utilized for the photoactive layer. The photovoltaic cells incorporate photoactive materials produced from dyads formed into an initial layer and then thermally cleaved to provide the photoactive layer. Cleavage of the dyads, such as synthesized fullerene anthracen-2-ylmethyl 3-(thiophen-3-yl) acetate dyads, or polymers of the dyads into separate molecules providing donors and acceptors facilitates in obtaining the photovoltaic cells with desired arrangement and interspacing of the donors and the acceptors relative to one another.
Abstract:
A data storage device assembly includes a drive bracket. The drive bracket includes a first side plate and a second side plate which faces to the first side plate. Each of the first side plate and the second side plate defines a slide way which is adapted to receive a data storage device assembly sliding therein. The first piece and a second piece is secured together on the first side plate. The second piece includes a pair of first bent pieces and a pair of second bent pieces connected to edges of the second piece. The pair of first bent pieces faces to each other. The pair of second bent pieces faces to each other. The pair of first bent pieces is secured to the pair of second bent pieces.