Wang Jinping, Wang Zhihong, Zhao Dianyun, Xu Caixia
Key Laboratory of Chemical Sensing & Analysis in Universities of Shandong, School of Chemistry and Chemical Engineering, University of Jinan, Jinan 250022, China.
School of Basic Medical Sciences, Shandong University of Traditional Chinese Medicine, Jinan 250355, China.
Anal Chim Acta. 2014 Jun 17;832:34-43. doi: 10.1016/j.aca.2014.04.062. Epub 2014 May 2.
Nanoporous (NP) PdFe alloy is easily fabricated through one step mild dealloying of PdFeAl ternary source alloy in NaOH solution. Electron microscopy characterization demonstrates that selectively dissolving Al from PdFeAl alloy generates three-dimensional bicontinuous nanospongy architecture with the typical ligament size around 5 nm. Electrochemical measurements show that the NP-PdFe alloy exhibits the superior electrocatalytic activity and durability towards hydrogen peroxide (H2O2) detection compared with NP-Pd and commercial Pd/C catalysts. In addition, NP-PdFe performs high sensing performance towards H2O2 in a wide linear range from 0.5 to 6 mM with a low detection limit of 2.1 μM. This nanoporous structure also can sensitively detect glucose over a wide concentration range (1-32 mM) with a low detection limit of 1.6 μM and high resistance against chloride ions. Along with these attractive features, the as-made NP-PdFe alloy also has a good anti-interference towards ascorbic acid, uric acid, and dopamine.
纳米多孔（NP）钯铁合金可通过在氢氧化钠溶液中对钯铁铝三元源合金进行一步温和脱合金轻松制备。电子显微镜表征表明，从钯铁铝合金中选择性溶解铝会产生三维双连续纳米海绵结构，其典型的韧带尺寸约为5纳米。电化学测量表明，与NP - 钯和商业钯/碳催化剂相比，NP - 钯铁合金对过氧化氢（H2O2）检测表现出优异的电催化活性和耐久性。此外，NP - 钯铁在0.5至6 mM的宽线性范围内对H2O2具有高传感性能，检测限低至2.1 μM。这种纳米多孔结构还能在1 - 32 mM的宽浓度范围内灵敏地检测葡萄糖，检测限低至1.6 μM，并且对氯离子具有高抗性。除了这些吸引人的特性外，所制备的NP - 钯铁合金对抗坏血酸、尿酸和多巴胺也具有良好的抗干扰能力。
