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帮忙翻译化学论文中的英文 英译汉14-15
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14. Pt/CuNWs, PtNTs (Cu), PtNTs (Ag), Pt/C, and BPPt were examined for ORR activity with RDE experiments (Figure 3). Kinetic activity was evaluated at 0.9 V vs RHE during anodic voltammograms at 1600 rpm and 20 mV s−1 in an oxygen saturated 0.1 M HClO4 electrolyte. 19,20 Catalyst activity for ORR was normalized to the total metal mass (M), Pt mass (Pt), and dollar (Figure 4 and Supporting Information, Figure S.6). Pt/CuNWs produced a metal mass activity of 0.082 A mg M−1 , within 97% of PtNTs (Cu). Pt/CuNWs further produced a Pt mass activity of 0.45 A mg Pt−1 , 3.5% greater than the DOE Pt target. Pt/CuNWs exhibited a dollar activity of 9.8 A $−1 , 1.4% greater than the dollar target, calculated from the DOE mass activity target. Catalysts were also evaluated in terms of area activity. Of particular interest was the large area activity of Pt/CuNWs and PtNTs (Cu), each exceeding the former DOE target by 2.1 times, Pt/C by 6.2 times, and reaching 77% the activity of BPPt. Pt/CuNWs and PtNTs (Cu) further exceeded the area activity of PtNTs (Ag) by 43%. 15. Electronic tuning potentially contributed to the high area activity of Pt/CuNWs and PtNTs (Cu). The CuNW template and Cu alloying within the Pt layer introduced compressive strain, widening the Pt d-band and shifting the center further from the Fermi level; the d-band center shift weakened oxygen chemisorption, improving ORR activity. 21 The d-band e ff ect for Pt Cu systems was previously con fi rmed on the following: a Pt shell on Pt Cu nanoparticles; 22 a Pt overlayer on Cu; 23 and a Pt Cu alloy. 23 |
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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 14:52:10
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2楼2013-11-17 21:38:48
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14。铂/ CuNWs，PtNTs（铜），PtNTs（银）的Pt / C和BPPT用RDE实验检测氧还原活性（图3）。在0.9 V vs RHE1600转每分和20 mV每秒动氧气饱和的0.1M高氯酸电解质阳极伏安法力进行动力活性测定。19,20 ORR催化活性以总金属质量（M），铂质量（Pt）和美元成本（图4和支持信息，图S.6）进行标化。铂/ CuNWs产生0.082每毫克质量的金属质量活性，为PtNTs（铜）的97％。铂/ CuNWs产生的铂质量活性为0.45A每毫克Pt，比美国能源部的Pt标准高出3.5％。铂/ CuNWs的美元活性为9.8A每美元，比美国能源部的质量美元活性目标高1.4％。催化剂活性同时采用了区域活性方式。特别是Pt/ CuNWs和PtNTs（铜）的巨大区域活性，均远超美国能源部以前的目标，超过2.1倍，Pt / C超过6.2倍，达到了BPPT活性的77％。铂/ CuNWs和PtNTs（Cu）的进一步突破PtNTs（银）的区域活性，超过43％。 15。电子调谐很大程度决定Pt/ CuNWs和PtNTs（铜）的高区域活性。铂层内的CuNW模板及铜合金引入压应变，拉大了铂的d带和使中心远离费米能级;d带中心偏移减弱氧的化学吸附，提高氧还原活性。 21 铂铜系统的d带效应以前证实如下：铂壳上的Pt Cu纳米铜颗粒;22 铜上铂覆层;23，铂铜合金。23 |
3楼2013-11-28 23:14:00
