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帮忙翻译化学文献中的英文 英译汉10-11
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10. The COad stripping voltammograms for Pt/C and Pt/CrN, seen in Figure 5a and b, respectively, show that the onset andpeak potentials toward CO ad oxidation on Pt/CrN are more negative than those observed for CO ad oxidation on Pt/C. The onset potential for CO ad oxidation was 0.40 V (vs SCE) for Pt/CrN and 0.48 V (vs SCE) for Pt/C, while the peak potential for COad oxidation was 0.51 V (vs SCE) for Pt/CrN and 0.53 V (vs SCE) for Pt/C. This indicates that Pt/CrN has a greater ECSA than Pt/C for CO oxidation, and thus Pt/CrN has greater intrinsic catalytic surface area than Pt/C. The actual ECSAs that were calculated from the CO ad oxidation charge after subtracting the background current were 82 and 75 m 2 /g for Pt/CrN and Pt/C, respectively. These values are also consistent with the average Pt particle sizes observed for the Pt/CrN and Pt/C catalysts. 11. The cyclic voltammograms of Pt/CrN and Pt/C seen in Figure 6a show that the onset potential of Pt/CrN toward methanol oxidation (0.20 V vs SCE) is more negative than that of Pt/C (0.22 V vs SCE), indicating that Pt/CrN has slightly greater catalytic activity for methanol electrooxidation. Furthermore, the peak current density for methanol oxidation on Pt/CrN is 195 mA mg−1 Pt, which is higher than the peak current density on Pt/C (145 mA mg−1 Pt). The specific activities of the two catalysts were also calculated as specific current normalized to the ECSA of each catalyst. The specific activity for Pt/CrN was 2.4 A/m2 of catalyst surface area, and the specific activity for Pt/C was 1.9 A/m2 of catalyst surface area. Finally, the plot of polarization current versus time measured at 0.6 V for each catalyst can be seen in Figure 6b. The Pt/CrN catalyst showed both a significantly slower deterioration rate and a higher steady-state current than the carbon-supported catalyst tested. Thus, we can conclude that the Pt/CrN catalyst has higher tolerance to poison in the electrolyte solution than the Pt/C catalyst. A summary of the electrochemical measurements obtained for the two catalysts can be seen in Table 1. |
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宝MMC: 金币+45, 翻译EPI+1, ★★★很有帮助, 非常感谢! 这篇文献翻译完成了，希望下次能够继续合作！ 2013-12-02 20:47:58
宝MMC: 金币+45, 翻译EPI+1, ★★★很有帮助, 非常感谢! 这篇文献翻译完成了，希望下次能够继续合作！ 2013-12-02 20:47:58
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10。CO吸附的Pt / C和Pt /氮化铬溶出伏安图，分别见图5a和b，显示了CO在Pt /氮化铬的吸附氧化发作和峰电位比观察到的CO在Pt/ C的吸附氧化更低。CO在Pt /氮化铬的吸附氧化发作电位为0.40 V (相对于SCE)，在Pt/C为 0.48 V (相对于SCE) 。而CO在Pt /氮化铬的吸附氧化锋值电位为0.51 V (相对于SCE)，在Pt/C为 0.53V (相对于SCE).表明，铂/氮化铬CO氧化反应具有比的Pt / C CO氧化反应更大的ECSA，从而铂/氮化铬具有比Pt/ C更大的内在催化表面面积。实际ECSA通过CO吸附氧化电荷减去背景电流后计算出，Pt /氮化铬和Pt/ C分别为82和75平方米/克。这些值也与观察到的Pt /氮化铬和Pt / C催化剂的平均Pt粒径一致。 11。图6a的Pt /氮化铬和Pt/ C循环伏安曲线可看出，Pt/氮化铬对甲醇氧化（0.20 V与SCE）的发作电位比的Pt / C（0.22 V与SCE）更低，表明的Pt/氮化铬对甲醇具有较大的电催化活性。此外，Pt /氮化铬对甲醇氧化的峰值电流密度为是195毫安每毫克Pt，比Pt / C高（145毫安每毫克Pt）。两种催化剂的具体催化活性通过具体电流标化为每种催化剂的ECSA，铂/氮化铬的具体活性为2.4安平方米催化剂表面积，Pt / C的具体活性为1.9安平方米催化剂表面积。最后，图6b可看出，每种催化剂极化电流的与时间的积为0.6 V 。Pt/氮化铬催化剂比碳负载的催化剂同时具有较慢的退化率和较高的稳态电流。表1是这两种催化剂的电化学测量的总结。 |
2楼2013-12-02 19:47:16