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首页> 外文期刊>RSC Advances >Large mesoporous carbons decorated with silver and gold nanoparticles by a self-assembly method: enhanced electrocatalytic activity for H2O2 electroreduction and sodium nitrite electrooxidation
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Large mesoporous carbons decorated with silver and gold nanoparticles by a self-assembly method: enhanced electrocatalytic activity for H2O2 electroreduction and sodium nitrite electrooxidation

机译：通过自组装方法用银和金纳米颗粒修饰的大介孔碳：增强的H2O2电还原和亚硝酸钠电氧化的电催化活性

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摘要

We report here the synthesis of silver and gold nanoparticles onto poly (diallyldimethyl ammoniumchloride, PDDA)-functionalized large mesoporous carbon (LMC) by a simple self-assembly method. Characterization of these nanocomposites by transmission electronic microscopy and electrochemical techniques is described. The gold nanoparticle-decorated PDDA-functionalized LMC (AuNPs/PDDA-LMC) showed an enhanced electrocatalytic response toward sodium nitrite oxidation with a wider linear range and higher sensitivity that is even comparable with Pt-based sensors. The silver nanoparticle-decorated PDDAfunctionalized LMC (AgNPs/PDDA-LMC) exhibited a remarkable catalytic performance toward H2O2 reduction. At an applied potential of -0.4 V, the designed sensor had a low detection limit of 6.5 mu M and wide linear response range from 20 mu M to 9.62 mM with a fast response time of less than 2 s. The easy fabrication and excellent electrocatalytic capability of the LMC-based metal nanoparticle hybrids can be expected to be applied in the detection of other compounds.
机译：我们在这里报告通过简单的自组装方法将银和金纳米颗粒合成到聚（二烯丙基二甲基氯化铵，PDDA）官能化的大介孔碳（LMC）上。这些纳米复合材料的表征通过透射电子显微镜和电化学技术。金纳米粒子修饰的PDDA-官能化LMC（AuNPs / PDDA-LMC）对亚硝酸钠氧化表现出增强的电催化响应，具有更宽的线性范围和更高的灵敏度，甚至可以与基于Pt的传感器相比。纳米银修饰的PDDA官能化LMC（AgNPs / PDDA-LMC）对H2O2还原表现出显着的催化性能。在-0.4 V的施加电势下，设计的传感器具有6.5μM的低检测限和20μM至9.62 mM的宽线性响应范围，且响应时间少于2 s。基于LMC的金属纳米颗粒杂化物的易于制造和出色的电催化能力可望用于检测其他化合物。

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