合成并比较了碳载Au(Au/C)、碳载Pd(Pd/C)、碳载高合金化Pd-Au(Pd-Au/C-T)和碳载非合金化Pd-Au(Pd-Au/C-H)催化剂对甲酸氧化的电催化活性和稳定性.结果表明,Au/C对甲酸氧化基本没有电催化活性,而Pd/C对甲酸氧化有较好的电催化性能,Au的加入能进一步提高Pd催化剂对甲酸氧化的电催化活性和稳定性,特别是Pd-Au/C-T对甲酸氧化的电催化活性和稳定性要好于Pd-Au/C-H,更远好于Pd/C催化剂.相关反应机理有待进一步揭示.
Using liquid-reduction or complex-redution method,four catalysts,i.e,the Au/C,Pd/C,Pd-Au/C-T and Pd-Au/C-H were preparated and which electroanalytic activities and stabilities for the oxidation of formic acid were compares.It was found that the Au/C catalyst has no electrocatalytic activity,and the Pd/C catalyst possesses the good electrocatalytic performance for the oxidation of formic acid.The addition of Au into the Pd/C catalyst can increase the electrocatalytic activity and stability.Especially,the electrocatalytic activity and stability of the Pd-Au/C-T catalyst with the alloy of Pd and Au are better than that of the of the Pd-Au/C-H catalyst,in which,Pd and Au do not form the alloy.The investigation of its reason is underway.
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