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清洁及氧修饰Cu(100)表面上水煤气变换反应的能量学; Reaction Energetics for WaterGas Shift Reaction over the Clean and the Oxygenmodified Cu(100)surfaces——Studied by the Bond Order Conservation Approach*
Wu TH(吴廷华) ; Xia WS(夏文生) ; Wang HY(汪海有) ; Wang ZQ(王仲权) ; Zhang HB(张鸿斌) ; Wan HL(万惠霖) ; Cai QR(蔡启瑞)
1998
关键词铜表面 水煤气变换反应 反应能量学 键级守恒方法 Copper surface\ Watergas shift reaction\ Reaction energetics\ Bond order conservation approach
英文摘要分别以清洁及氧修饰Cu(100)表面作为金属态铜和部分氧化态铜的表面模拟,用键级守恒MOrSE势法研究了两种表面上水煤气变换(WgS)反应的能量学。计算结果表明:清洁Cu(100)表面上,WgS反应有可能同时按表面氧化还原和甲酸根两种机理进行;表面氧化还原机理中,COS主要由OHS(而不是OS)氧化为CO2S。与清洁铜表面相比,Cu(100)P(2x2)O表面上WgS反应中活化能最大的基元步骤H2OS→OHS+HS的活化能显著增加(是清洁铜表面上的两倍多)。因此,从反应能量学角度看,WgS反应在金属态铜表面上比碚分氧化态铜表面上更有利,这支持了Cu0是WgS反应的活性位的观点。; Clean and Oxygenmodified Cu(100) surfaces have been used to model the metallic and the partially oxidized copper surfaces respectivelyActivation energies for elementary reactions in volved in the watergas shift(WGS)reaction over Cu(100)and Cu(100)p(2×2)O surface have been calculated using bond order conservationMorse potential approach.Judging by the activation energies, we concluded(i)WGS reaction proceeds via both surface redox and formate mechanisms;(ii)COs is mainly oxidized to CO2s by OHs rather than by Os;(iii)the dissociative adsorption of water is expected to be the ratedetermining step;(iv)WGS reaction is more favorable over the metallic copper surface than that over the partially oxidized copper surface.; 国家自然科学基金
语种zh_CN
内容类型期刊论文
源URL[http://dspace.xmu.edu.cn/handle/2288/107549]  
专题化学化工-已发表论文
推荐引用方式
GB/T 7714
吴廷华,夏文生,汪海有,等. 清洁及氧修饰Cu(100)表面上水煤气变换反应的能量学, Reaction Energetics for WaterGas Shift Reaction over the Clean and the Oxygenmodified Cu(100)surfaces——Studied by the Bond Order Conservation Approach*[J],1998.
APA 吴廷华.,夏文生.,汪海有.,王仲权.,张鸿斌.,...&蔡启瑞.(1998).清洁及氧修饰Cu(100)表面上水煤气变换反应的能量学..
MLA 吴廷华,et al."清洁及氧修饰Cu(100)表面上水煤气变换反应的能量学".(1998).
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