| 摘要 |
FIELD: electrical engineering. ^ SUBSTANCE: invention relates to electrical engineering, particularly to the method of making a catalytic layer for a fuel cell. The method involves dispersion of an alcohol solution of platinum black by passing it through a hollow metallic needle-anode into an electric field between an anode and an annular control electrode which is coaxial with the anode. A potential difference öU is applied across the said electrodes. The formed jet of platinum black solution is deposited on the surface of a carrier catalytic layer, placed on a substrate-cathode, at potential difference between the annular control electrode and the cathode öU1. Values öU and öU1 are defined by the expression: 1.5105r1/2 ln(R/r)ëñöUëñUcr, B; öU1ëêöU(L/RC)1/2, V; where r - is the radius of the hole in the needle, m; R - is the radius of the hole in the control electrode, m, L - is the distance between the extractor and the surface of the carrier catalytic layer, m; RC - is the radius of the spot of catalytic layer on the surface the anode, m; Ucr - is the critical value of potential difference between the control electrode and the anode, V, at which flow changes over to multi-jet mode. ^ EFFECT: easier formation of catalytic layer on the surface a proton-conducting membrane or graphite paper, as well as possibility of controlling structural parametres of the catalytic layer. ^ 4 cl, 4 dwg |
