金属蒸气合成法制备燃料电池电极催化剂Ⅰ.Ag_n/C电极的制备及性质

PREPARATION OF FUEL CELL ELECTRODE CATALYST VIA METAL VAPOR SYNTHESIS Ⅰ. PREPARATION AND PROPERTIES OF Ag_n/C ELECTRODE

金属蒸气合成法(MVS)已用于新材料的制备。我们曾报道用此法制备负载型金属催化剂。本文报道用MVS法制备的Ag_n/C燃料电池电极的结构与催化性能。

The metal vapor synthesis (MVS) method has been used to prepare Ag_n/C fuel cell elec. trode catalysts with different Ag contents. The results of XRD and TEM measure ments showed that as Ag content increased the particle size of Ag_n clusters increased. XRD and XPS data indicated that Ag was mainly in zero.valence state.Ag_n/C catalysts prepared by MVS method have smaller particles of Ag_n, more narrow particle size distribution and greater catalytic activities than the Ag_n/C catalyst with the same content of Ag prepared by conventional method.