私密直播全婐app免费大渔直播,国产av成人无码免费视频,男女同房做爰全过程高潮,国产精品自产拍在线观看

當前位置:群英聚首 > 論文著作 > 正文
Methanol oxidation on Pt3Sn(111) for direct methanol fuel cells: methanol decomposition.
來源:魯效慶教授個人網站 發布日期:2017-03-16
作者:X. Q. Lu,* Z. G. Deng, C. Guo, W. L. Wang, S. X. Wei, S.-P. Ng, X. F. Chen, N. Ding, W. Y. Guo, C
關鍵字:density functional theory,direct methanol fuel cell。methanol decomposition,microkinetic modeling,Pt3Sn(111)
論文來源:期刊
具體來源:ACS Appl. Mater. Interfaces
發表時間:2016年
PtSn alloy, which is a potential material for use in direct methanol fuel cells, can efficiently promote methanol oxidation and alleviate the CO poisoning problem. Herein, methanol decomposition on Pt3Sn(111) was systematically investigated using periodic density functional theory and microkinetic modeling. The geometries and energies of all of the involved species were analyzed, and the decomposition network was mapped out to elaborate the reaction mechanisms. Our results indicated that methanol and formaldehyde were weakly adsorbed, and the other derivatives (CHxOHy, x = 1–3, y = 0–1) were strongly adsorbed and preferred decomposition rather than desorption on Pt3Sn(111). The competitive methanol decomposition started with the initial O–H bond scission followed by successive C–H bond scissions, (i.e., CH3OH → CH3O → CH2O → CHO → CO). The Br?nsted–Evans–Polanyi relations and energy barrier decomposition analyses identified the C–H and O–H bond scissions as being more competitive than the C–O bond scission. Microkinetic modeling confirmed that the vast majority of the intermediates and products from methanol decomposition would escape from the Pt3Sn(111) surface at a relatively low temperature, and the coverage of the CO residue decreased with an increase in the temperature and decrease in partial methanol pressure.
Copyright © 2005 Polymer.cn All rights reserved
中國聚合物網 版權所有
經營性網站備案信息

京公網安備11010502032929號

工商備案公示信息

京ICP證050801號

京ICP備12003651號

主站蜘蛛池模板: 满洲里市| 齐河县| 呼伦贝尔市| 开江县| 安溪县| 台北市| 柯坪县| 吴旗县| 望城县| 柳江县| 沙湾县| 牙克石市| 方城县| 河西区| 南雄市| 化德县| 台中市| 兴和县| 汤阴县| 西城区| 张掖市| 焦作市| 德阳市| 合川市| 洛宁县| 施秉县| 额济纳旗| 大宁县| 盐亭县| 五峰| 顺昌县| 麻城市| 安阳县| 扶风县| 嫩江县| 电白县| 台北市| 济南市| 沾益县| 鹰潭市| 绥滨县|