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Na_2SO_4溶液中磷酸环己胺的缓蚀机理及其吸附与脱附行为 被引量:12
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作者 程玉峰 杜元龙 曹楚南 《中国腐蚀与防护学报》 CAS CSCD 1997年第2期142-146,共5页
应用极化曲线和交流阻抗技术研究了磷酸环己胺在Na_2SO_4溶液中的缓蚀机理及其吸附与脱附行为。结果表明,磷酸环己胺是一种负催化效应作用机理的阳极型缓蚀剂。它在铁电极上的吸附等温式符合Temkin模型。由于缓蚀剂的吸附与脱附作用,其... 应用极化曲线和交流阻抗技术研究了磷酸环己胺在Na_2SO_4溶液中的缓蚀机理及其吸附与脱附行为。结果表明,磷酸环己胺是一种负催化效应作用机理的阳极型缓蚀剂。它在铁电极上的吸附等温式符合Temkin模型。由于缓蚀剂的吸附与脱附作用,其阴极极化曲线存在着氧扩散极限电流区、强吸附区和Tafel线性区,而阳极极化曲线存在着Tafel线性区、脱附区和无缓蚀区。阳极脱附对于C_d、R_t等阻抗参数有显著影响。缓蚀剂浓度与吸附电位和脱附电位之间存在着良好的线性关系,但对吸附电位范围却无甚影响。 展开更多
关键词 磷酸环己胺 缓蚀机理 吸附 脱附 硫酸钠溶液
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Hydrothermal Synthesis and Structure of a New Two-dimensional Zincophosphite: Zn_2(HPO_3)_3·H_2DACH(DACH = 1,2-diaminocyclohexane)
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作者 PANJian-Xin ZHENGShou-Tian YANGGuo-Yu 《Chinese Journal of Structural Chemistry》 SCIE CAS CSCD 北大核心 2004年第8期850-854,共5页
A new open-framework zincophosphite, Zn2(HPO3)3H2DACH 1, was hydro- thermally synthesized in the presence of 1,2-diaminocyclohexane (DACH) as structure-directing agent. Its structure was determined by single-crystal X... A new open-framework zincophosphite, Zn2(HPO3)3H2DACH 1, was hydro- thermally synthesized in the presence of 1,2-diaminocyclohexane (DACH) as structure-directing agent. Its structure was determined by single-crystal X-ray diffraction and further characterized by FTIR, elemental analysis, powder X-ray diffraction and thermogravimetric analysis. Crystal data for 1: Mr = 486.88, monoclinic, space group P21/c with a = 10.2287(11), b = 9.7624(11), c = 16.1686(18) , b = 92.573(2), V = 1612.9(3) 3, Z = 4, Dc = 2.005 g/cm3, F(000) = 984, = 3.314 mm-1 and S = 1.152. The final R = 0.0473 and wR = 0.1121 for 2456 observed reflections with I > 2s(I). The inorganic layer consisting of four- and eight-membered rings is constructed of alternating ZnO4 tetrahedra and HPO3 pseudo pyramids by sharing vertices. The organic template molecules reside in the interlayer region and interact with the inorganic network through H-bonds. 展开更多
关键词 ZINCOPHOSPHITE hydrothermal synthesis crystal structure OPEN-FRAMEWORK
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