A novel maize variety designated PH1KH4 and seed, plants and plant parts thereof. The disclosed method for preparing a PtCo nanocube catalyst enables preparation of nanocubes with uniform size and cubic shape through a simple process and application for development of high-efficiency fuel cells by preventing change in shape, surface area and composition caused by agglomeration of the nanocubes. In the later configuration, it includes a housing, an input port for receiving multiple telephone or data lines and an output port for connecting a compatible device, such as a computer modem, to one of the telephone lines. A light scattering layer, including a forward scattering film, is provided on the upper surface of the element substrate.