Carbon nanotubes with diameters ranging between 140～220nm was synthesized with chemical vapor deposition method, and treated using nitric acid as oxidant. Pt/C catalysts were prepared using untreated and treated carb...Carbon nanotubes with diameters ranging between 140～220nm was synthesized with chemical vapor deposition method, and treated using nitric acid as oxidant. Pt/C catalysts were prepared using untreated and treated carbon nanotubes as supports, respectively. TEM and FT IR differential spectra showed that treated carbon nanotubes become short and possess more oxygen containing surface groups. The electrochemical studies indicated that the Pt/treated carbon nanotubes catalyst possessed much higher electrocatalytic activity for the oxidation of methanol than that of the Pt/untreated carbon nanotubes catalyst.展开更多
以莲蓬壳(LS)为原料,经水热反应、盐封和碳化活化处理,得到O掺杂的介孔碳材料LSC-s。采用浸渍化学还原法负载PtRu纳米粒子,制得负载型催化剂PtRu/LSC-s。PtRu/LSC-s催化剂用于甲醇电氧化的起始氧化电位为0.29 V,峰电流为798.4 m A/mgPt...以莲蓬壳(LS)为原料,经水热反应、盐封和碳化活化处理,得到O掺杂的介孔碳材料LSC-s。采用浸渍化学还原法负载PtRu纳米粒子,制得负载型催化剂PtRu/LSC-s。PtRu/LSC-s催化剂用于甲醇电氧化的起始氧化电位为0.29 V,峰电流为798.4 m A/mgPt,稳定电流为27.8 m A/mgPt,催化活性优于商业PtRu/C催化剂,还具有抗CO毒性强的优点。展开更多
文摘Carbon nanotubes with diameters ranging between 140～220nm was synthesized with chemical vapor deposition method, and treated using nitric acid as oxidant. Pt/C catalysts were prepared using untreated and treated carbon nanotubes as supports, respectively. TEM and FT IR differential spectra showed that treated carbon nanotubes become short and possess more oxygen containing surface groups. The electrochemical studies indicated that the Pt/treated carbon nanotubes catalyst possessed much higher electrocatalytic activity for the oxidation of methanol than that of the Pt/untreated carbon nanotubes catalyst.
文摘以莲蓬壳(LS)为原料,经水热反应、盐封和碳化活化处理,得到O掺杂的介孔碳材料LSC-s。采用浸渍化学还原法负载PtRu纳米粒子,制得负载型催化剂PtRu/LSC-s。PtRu/LSC-s催化剂用于甲醇电氧化的起始氧化电位为0.29 V,峰电流为798.4 m A/mgPt,稳定电流为27.8 m A/mgPt,催化活性优于商业PtRu/C催化剂,还具有抗CO毒性强的优点。
