不同状态Au对甲酸在Pd催化剂上电催化性能的影响

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.

Effect of Au at Different States on Electrocatalytic Performance of Pd Catalyst for Oxidation of Formic Acid

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.