| 改进液相还原法制备的Pd/C催化剂对甲酸氧化的电能 |
| Electrocatalytic Performance of Pd/C Catalyst Prepared with Improved Liquid Phase Reduction Method for Oxidation of Formic Acid |
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| 摘要: 用液相还原法制备炭载Pd(Pd/C)催化剂时，先用Na2CO3调节溶液pH值至8～9，然后加入还原剂还原PdCl2，由于PdCl2能与Na2CO3形成配合物，降低了得到的Pd粒子聚集倾向，使制得的Pd/C催化剂中Pd粒子的平均粒径和相对结晶度都较小，分别为3.57 nm和1.37。而没有加Na2CO3制得的Pd/C催化剂中Pd粒子的 |
| 关键词: 甲酸 直接甲酸燃料电池 炭载钯催化剂 碳酸钠 |
| 基金项目: |
| Abstract: The electrocatalytic performance of the Pd/C catalyst prepared with the improved liquid phase reduction method was investigated using the electrochemical, X-ray diffraction(XRD), transmission electron microspectroscopy (TEM), ultravilet visible (UV-Vis) absorption spectroscopy. It is found that when the Pd/C catalyst is prepared with the improved liquid phase reduction method using Na2CO3 to adjust the pH value of the solution to 8～9 before adding the reduction reagent both the average size and relative crystalinity of the Pd particles in the Pd/C catalyst prepared are as small as 3.57 nm and 1.37, respectively. This is due to that PdCl2 and Na2CO3 can form the complex, leading to the decrease in the aggregation trend of the Pd particles and thus, the decrease in the average size and relative crystalinity of the Pd particles in the Pd/C catalyst. If Na2CO3 is not added, both the average size and relative crystalinity of the Pd particles in the Pd/C catalyst prepared are as large as 21.0 nm and 6.29, respectively. Therefore, the electrocatalytic activity and stability of the Pd/C catalyst prepared with the liquid phase reduction method with Na2CO3 are better than that of the Pd/C catalyst prepared without Na2CO3. Therefore, the improved liquid phase reduction method is still simple, while the electrocatalytic performance of the Pd/C catalyst prepared with the improved liquid phase reduction method is excellent. |
| Keywords: formic acid direct formic acid fuel cell carbon supported Pd catalyst sodium carbonate |
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| 陈滢,唐亚文,高颖,陆天虹.改进液相还原法制备的Pd/C催化剂对甲酸氧化的电能[J].无机化学学报,2008,24(4):560-564. |
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