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吉也虫虫

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[求助] 大连化物所张涛关于金铂合金催化剂对一氧化二氮分解反应的催化性能

大连化物所张涛的一篇文献:Bimetallic Au−Pd Alloy Catalysts for N2O Decomposition Effects of Surface Structures on Catalytic Activity。中有一段翻译不通顺,理解不了,希望虫友帮帮我啊!很着急啊

The chemisorption of O2 shows that both the adsorption heat and the saturation uptake decrease with an increase of Au/Pd ratio, suggesting alloying Pd with gold will facilitate the desorption of oxygen adatoms as O2, which is generally the rate-determining step for N2O decomposition reaction.
Theoretical investigations using periodic DFT methods confirm the tunable O2 desorption ability by alloying Pd with Au and indicate that contiguously located Pd sites are indispensable for N2O decomposition because they function as the active sites for the elementary step of N2O decomposition into N2 and oxygen adatom, which becomes the rate-determining step over the Au−Pd alloy catalysts.

[ Last edited by pzypdl on 2013-4-5 at 23:39 ]
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王晓萌: 金币+2, 谢谢分享! 2013-04-06 12:00:55
吉也虫虫: 金币+5, ★★★★★最佳答案 2013-04-06 15:57:05
氧的化学吸附表明,随着金/钯比增加吸附热与饱和度呈现下降趋势,表明合金钯金将促进氧原子以O2的方式解吸,这通常是N2O分解反应的决定步骤。
周期性密度泛函理论研究方法确定Pd、Au合金具备调整O2解吸的能力,表明Pd连续活性位对N2O分解来说是不可缺少的,因为他们是N2O分解成N2和氧原子初始反应的活性位,这也是金钯合金催化剂的控制步骤。
才须学也,非学无以广才,非志无以成学。【科研生活区】、【碳一化工】(煤、天然气化工)欢迎您常来交流
2楼2013-04-06 11:19:27
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