A kind of PH gradient microfluidic chips through soft-lithography microfabrication for isoelectric focusing (IEF) and high performance liquid chromatography (HPLC) is introduced here. These pH gradient chips have the ...A kind of PH gradient microfluidic chips through soft-lithography microfabrication for isoelectric focusing (IEF) and high performance liquid chromatography (HPLC) is introduced here. These pH gradient chips have the advan- tages such as easy fabrication, controllable pH range and precision, isoelectric focusing and separation at the same time, low voltage for isoelectric focusing, and time stable pH gradient. This method has potential application to sample preparation, separation and analysis of microfluidic chips.展开更多
通过化学镀法制备了具有"三明治夹心"结构的Ni-P@Ni-B/Ni催化电极.该催化材料为直径1μm左右的微球.电化学性能测试结果表明,在电流密度为10 m A/cm^2时,其在0.5 mol/L PBS缓冲液(pH=7)中的过电位仅为287 m V,在此电位下连续...通过化学镀法制备了具有"三明治夹心"结构的Ni-P@Ni-B/Ni催化电极.该催化材料为直径1μm左右的微球.电化学性能测试结果表明,在电流密度为10 m A/cm^2时,其在0.5 mol/L PBS缓冲液(pH=7)中的过电位仅为287 m V,在此电位下连续工作24 h后,电流密度仅衰减了7.6%.同时Ni-P@Ni-B/Ni在酸性(0.5 mol/L H2SO4)和碱性(1 mol/L KOH)条件下也具有优异的析氢反应催化活性,达到相同电流密度时过电位分别为199和79 m V.该工作为全p H环境下高效电解水制氢提供了新思路.展开更多
文摘A kind of PH gradient microfluidic chips through soft-lithography microfabrication for isoelectric focusing (IEF) and high performance liquid chromatography (HPLC) is introduced here. These pH gradient chips have the advan- tages such as easy fabrication, controllable pH range and precision, isoelectric focusing and separation at the same time, low voltage for isoelectric focusing, and time stable pH gradient. This method has potential application to sample preparation, separation and analysis of microfluidic chips.
文摘通过化学镀法制备了具有"三明治夹心"结构的Ni-P@Ni-B/Ni催化电极.该催化材料为直径1μm左右的微球.电化学性能测试结果表明,在电流密度为10 m A/cm^2时,其在0.5 mol/L PBS缓冲液(pH=7)中的过电位仅为287 m V,在此电位下连续工作24 h后,电流密度仅衰减了7.6%.同时Ni-P@Ni-B/Ni在酸性(0.5 mol/L H2SO4)和碱性(1 mol/L KOH)条件下也具有优异的析氢反应催化活性,达到相同电流密度时过电位分别为199和79 m V.该工作为全p H环境下高效电解水制氢提供了新思路.
