Instituto de Catálisis y Petroleoquimica, CSIC, c/Marie Curie 2, L10, 28049 Madrid, Spain.
Biomedical Sciences Faculty of Health and Society, Malmo University, SE-205 06 Malmo, Sweden.
Bioelectrochemistry. 2016 Feb;107:30-6. doi: 10.1016/j.bioelechem.2015.10.003. Epub 2015 Oct 9.
cathodes. Nanostructuring was provided by gold nanorods (AuNRs), which were characterized and covalently attached to electrodes made of low-density graphite. The nanostructured electrode was the scaffold for covalent and oriented attachment of ThLc. The bioelectrocatalytic currents measured for oxygen reduction were as high as 0.5 mA/cm(2 and 0.7 mA/cm(2), which were recorded under direct and mediated electron transfer regimes, respectively. )The experimental data were fitted to mathematical models showing that when the O2 is bioelectroreduced at high rotation speed of the electrode the heterogeneous electron transfer step is the rate-liming stage. The electrochemical measurement hints a wider population of non-optimally wired laccases than previously reported for 5–8 nm size Au nanoparticle-modified electrode, which could be due to a larger size of the AuNRs when compared to the laccases as well as their different crystal facets.
电极。纳米结构由金纳米棒（AuNRs）提供，对其进行了表征并将其共价连接到由低密度石墨制成的电极上。纳米结构电极是ThLc 共价和定向附着的支架。测量的氧还原生物电化学电流高达 0.5 mA/cm(2 和 0.7 mA/cm(2)，分别在直接和介导电子转移条件下记录。）实验数据拟合到数学模型表明，当 O2 在电极的高旋转速度下进行生物电化学还原时，异质电子转移步骤是限速阶段。电化学测量表明，与之前报道的 5-8nm 尺寸 Au 纳米颗粒修饰电极相比，非最佳布线漆酶的种群更大，这可能是由于 AuNRs 的尺寸比漆酶大，以及它们的不同晶面。
