Li Mohan, Ulrich Nils, Schubert Ina, Sigle Wilfried, Peter Wagner Michael Florian, Trautmann Christina, Toimil-Molares Maria Eugenia
Materials Research, GSI Helmholtzzentrum für Schwerionenforschung 64291 Darmstadt Germany
Materials and Earth Sciences, Technische Universität Darmstadt 64287 Darmstadt Germany.
RSC Adv. 2023 Feb 3;13(7):4721-4728. doi: 10.1039/d2ra08035d. eCollection 2023 Jan 31.
We report the catalytic performance of networks of highly interconnected Au nanowires with diameters tailored between 80 and 170 nm. The networks were synthesized by electrodeposition in etched ion-track polymer templates, and the synthesis conditions were developed for optimal wire crystallinity and network homogeneity. The nanowire networks were self-supporting and could be easily handled as electrodes in electrochemical cells or other devices. The electrochemically active surface area of the networks increased systematically with increasing the wire diameter. They showed a very stable performance during 200 CV cycles of methanol oxidation reactions, with the peak current density reaching up to 200 times higher than that of a flat reference electrode, with only a 5% drop in the peak current density. The Au nanowire networks proved to be excellent model systems for investigation of the performance of porous catalysts and very promising nanosystems for application in direct alcohol fuel cell catalysts.
我们报道了直径在80至170纳米之间的高度互连金纳米线网络的催化性能。这些网络是通过在蚀刻的离子径迹聚合物模板中进行电沉积合成的，并且开发了合成条件以实现最佳的线结晶度和网络均匀性。纳米线网络是自支撑的，可以很容易地作为电化学电池或其他设备中的电极进行处理。随着线直径的增加，网络的电化学活性表面积系统地增加。在甲醇氧化反应的200次循环伏安（CV）测试中，它们表现出非常稳定的性能，峰值电流密度比平面参比电极高出多达200倍，且峰值电流密度仅下降5%。金纳米线网络被证明是研究多孔催化剂性能的优秀模型系统，也是用于直接醇类燃料电池催化剂的非常有前景的纳米系统。
