ZnZrOx 固溶体催化剂是一种新型的 CO₂ 加氢制甲醇催化剂,它可以同时实现甲醇的高选择性制备(>90%)和长时间的稳定运行(>5000h),本工作利用 operando 检测技术和理论计算方法,同时对 ZnZrOx 固溶体催化剂上的表面过程和反应活性进行检测,结果表明,催化剂表面的 Zn-O-Zr 不对称位点对于甲酸盐...
1)光谱表征结果说明,CO2在不对称Zn-O-Zr位点吸附转化为双齿结构碳酸盐,随后加氢生成甲酸盐。Zn位点用于活化H2分子,Zr位点用于稳定反应中间体。 2)ZnZrOx催化剂的不对称Zn-O-Zr位点不仅促进生成甲酸盐,而且促进甲酸盐的转化。
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Effects of Zn[O.Sub.2], Zr[O.Sub.2], [Cu.Sub.2][O.Sub.3], CuO, CaC[O.Sub.3], SF, FA, Cement and Geothermal Silica Silica Waste Nanoparticles on Properties of Cementitious Materials-A Short Guide for Civil EngineerRashad, Alaa M...
亮点3:在 ZnZr8O(350)-Zn/Z5 复合催化剂上,CO2加氢制芳烃遵循甲醇介导途径,轻质芳烃的选择性和 CO2的转化率分别达到了 63.9% 和 15.2%,并且在连续运行了 80 h 后,复合催化剂未表现出明显失活。 ▲ 图5. (a) 催化剂...
Low-temperature sintering and piezoelectric properties of 0.6Pb (Zr 0.47 Ti 0.53 )O 3 ·0.4Pb(Zn 1/3 Nb 2/3 )O 3 ceramics. Seo, Seung-Beom,Lee, Seung-Ho,Yoon, Chang-Bun,Park, Gun-Tae,Kim, Hyoun-Ee. Journal of the American Ceramic Society . 2004...
X-Ray diffraction results showed that the crystal structure of Zn 1 x Zr x O was that of hexagonal wurtzite. The structural properties showed no additional phases at low impurity contents ( x Zr < 3%); however, impurity peaks belonging to ZrO 2 appeared at high impurity contents ( x Zr ...
利用废旧锌铁皮制备磁性Fe3O4胶体粒子及副产物ZnO的一种制备流程图如下:稻H:SO足量NaOH溶液溶液A(含ZnO片)拍滤Zn(OH):Zr成滤液锌铁皮不溶物部分氧化溶液B(含Fe,Fe磁悬浮分高一+FO.胶体稀HCI适量NaCIONaHCO,(1)用NaOH溶液处理废旧锌铁皮发生反应的化学方程式为___。(2)①若溶液A中滴加稀H2SO4过量,会溶解...
Ga-Nb – Na-Zn Nb-Ni – Se-Tm Se-U – As-F-N As-F-Na – Ba-N-Sb Ba-N-Si – Cl-K-U Cl-K-V – Cu-In-Y Cu-In-Yb – Fe-Si-Yb Fe-Si-Zn – Ho-Na-Se Ho-Nb-O – Y-Zn-Zr Ac-H-O-P – Ba-C-Ni-O Ba-C-O-P – C-Cl-Nb-O C-Cl-Nb-Ti...
Aliovalent MnTi and GaTi substitution in high-temperature piezoelectric (x)Bi(Zn0.5Zr0.5)O3—(y)BiScO3—(100 – x − y)PbTiO3 来自 Springer 喜欢 0 阅读量: 21 作者:B.,Kowalski,A.,Sayir,A.,Sehirlioglu 摘要: Aliovalent substitution of 1–2 % Mn and Ga for Ti has been carried ou...