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| 本帖產(chǎn)生 1 個 翻譯EPI ，點擊這里進行查看 | |||
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寶MMC金蟲 (小有名氣)
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[求助]
幫忙翻譯化學論文中的英文 英譯漢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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RXMCDM
版主 (文壇精英)
- 翻譯EPI: 530
- 應助: 401 (碩士)
- 貴賓: 1.908
- 金幣: 38947.6
- 散金: 4908
- 紅花: 88
- 沙發(fā): 4
- 帖子: 11453
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- 注冊: 2013-10-20
- 性別: GG
- 專業(yè): 一般管理理論與研究方法論
- 管轄: 論文翻譯
【答案】應助回帖
★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★
寶MMC: 金幣+45, 翻譯EPI+1, ★★★很有幫助, 希望能繼續(xù)合作！ 2013-12-01 09:49:55
寶MMC: 金幣+45, 翻譯EPI+1, ★★★很有幫助, 希望能繼續(xù)合作！ 2013-12-01 09:49:55
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14。鉑/ CuNWs，PtNTs（銅），PtNTs（銀）的Pt / C和BPPT用RDE實驗檢測氧還原活性（圖3）。在0.9 V vs RHE1600轉每分和20 mV每秒動氧氣飽和的0.1M高氯酸電解質(zhì)陽極伏安法力進行動力活性測定。19,20 ORR催化活性以總金屬質(zhì)量（M），鉑質(zhì)量（Pt）和美元成本（圖4和支持信息，圖S.6）進行標化。鉑/ CuNWs產(chǎn)生0.082每毫克質(zhì)量的金屬質(zhì)量活性，為PtNTs（銅）的97％。鉑/ CuNWs產(chǎn)生的鉑質(zhì)量活性為0.45A每毫克Pt，比美國能源部的Pt標準高出3.5％。鉑/ CuNWs的美元活性為9.8A每美元，比美國能源部的質(zhì)量美元活性目標高1.4％。催化劑活性同時采用了區(qū)域活性方式。特別是Pt/ CuNWs和PtNTs（銅）的巨大區(qū)域活性，均遠超美國能源部以前的目標，超過2.1倍，Pt / C超過6.2倍，達到了BPPT活性的77％。鉑/ CuNWs和PtNTs（Cu）的進一步突破PtNTs（銀）的區(qū)域活性，超過43％。 15。電子調(diào)諧很大程度決定Pt/ CuNWs和PtNTs（銅）的高區(qū)域活性。鉑層內(nèi)的CuNW模板及銅合金引入壓應變，拉大了鉑的d帶和使中心遠離費米能級;d帶中心偏移減弱氧的化學吸附，提高氧還原活性。 21 鉑銅系統(tǒng)的d帶效應以前證實如下：鉑殼上的Pt Cu納米銅顆粒;22 銅上鉑覆層;23，鉑銅合金。23 |
3樓2013-11-28 23:14:00
xiaojian0502
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nono2009: 屏蔽內(nèi)容, 違規(guī)存檔, 本版嚴禁google等機器翻譯 2013-11-18 14:52:10
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2樓2013-11-17 21:38:48
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