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帮忙翻译化学论文中的英文 英译汉13
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| 13. Catalyst ECSAs were determined during cyclic voltammo- grams in an argon saturated 0.1 M HClO 4 electrolyte at a scan rate of 20 mV s−1 (Figure 2). ECSAs were calculated by the charge associated with hydrogen adsorption. ECSAs were further verified with the charge associated with carbon monoxide oxidation (Supporting Information, Figure S.5). Carbon monoxide oxidation voltammograms were performed by holding a potential of 0.2 V vs RHE for 20 min, the fi rst 10 min in a carbon monoxide saturated electrolyte (10% carbon monoxide, balance nitrogen) and the second 10 min in an argon saturated 0.1 M HClO 4 electrolyte; following potential holding, a voltammogram was immediately performed at 20 mV s−1 . ECSAs for Pt/CuNWs, PtNTs (Cu), PtNTs (Ag), and Pt/C were determined to be 5.5, 5.6, 15.2, and 60.1 m 2 g−1 ,respectively, on a total mass basis. On a Pt mass basis, Pt/CuNWs, PtNTs (Cu), PtNTs (Ag), and Pt/C had ECSAs of 30.6, 5.9, 15.7, and 60.1 m 2 g−1 , respectively. Pt/CuNWs had a much higher ECSA than PtNT (Cu) because of an increased Pt utilization. While PtNTs (Cu) had an 11 nm wall thickness, Pt/ CuNWs were estimated to have an approximate Pt coating of 2 nm. Cu was also unstable during cyclic voltammetry and ORR experiments because of a low dissolution potential; because of the ease of electrochemically removing Cu, it was unlikely that Pt/CuNWs contained Cu impurities on the surface during ORR testing. Complete removal of Cu was further con fi rmed by the lack of Cu features in the cyclic voltammograms. |
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xiaojian0502
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nono2009: 屏蔽内容, 违规存档, 本版严禁google等机器翻译 2013-11-18 14:50:43
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2楼2013-11-17 21:39:36
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13。催化剂的ECSA通过循环伏安法在氩气饱和的0.1M高氯酸电解质20毫伏每秒的扫描速率（图2）条件下测定。 ECSA计算采用与氢吸附相关联的电荷。ECSA通过一氧化碳氧化电荷（支持信息，图S.5）进一步验证。一氧化碳氧化伏安法为0.2伏的电位Vs20分钟，最初的10分钟在一氧化碳饱和的电解质（10％的一氧化碳，氮平衡），然后10分钟在氩气饱和的0.1M高氯酸电解质;然后保持电位，立即在20 mV每秒进行伏安法测定。以总质量计算，铂/ CuNWs，PtNTs（Cu），PtNTs（Ag）和铂/ C的ECSA分别为5.5，5.6，15.2，60.1m2每克。以Pt质量计，铂/ CuNWs，PtNTs（Cu），PtNTs（Ag）和铂/ C的ECSA分别为30.6 ECSAs，5.9，15.7，和60.1m2每克。因为增加了更多的Pt,Pt / CuNWs的ECSA比PTNT（铜）高得多。虽然PtNTs（铜）11纳米的厚壁，铂/ CuNWs有约2纳米铂涂层。因为低溶解电位循环伏安法和ORR实验，铜也是不稳定的。因为电化学去除铜极容易，Pt/ CuNWs在ORR测定过程中表面含有铜杂质是不可能的。Cu的完全去除经无铜特征循环伏安图得以证实。 adsorption似乎应为absorption , m 2 g−1中的2似乎应为平方。 |
3楼2013-11-28 22:14:39