College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, PR China.
College of Chemical and Environmental Engineering, Shandong University of Science and Technology, Qingdao 266590, PR China.
J Colloid Interface Sci. 2019 Nov 1;555:195-202. doi: 10.1016/j.jcis.2019.07.092. Epub 2019 Jul 30.
Mastery over the structure at nanoscale can efficiently tune the catalytic properties of catalysts, enabling great enhancement in electrocatalytic performance toward liquid fuel electrooxidation reactions. Herein, we demonstrate a facile one-pot method for the successful fabrication of binary PdCu nanocatalysts bounded with 3D open-structured nanocages, which show the advantages of high surface areas, facile mass/electron transport, and strong synergistic effect. Impressively, the resultant 3D open-structured PdCu nanocages (NCs) show large promotion in electrocatalytic performance toward ethanol oxidation reaction (EOR) with the mass activity of 1790.8 mA mg, being 3.3 times higher than that of commercial Pd/C (536.2 mA mg). Besides, the specific activity for EOR on PdCu NCs (7.7 mA cm) is also comparable to many Pt-based electrocatalysts, suggesting the dramatically improved electrocatalytic activity. The outstanding electrocatalytic performance of binary PdCu catalysts is attributed to the highly open 3D nanocage structure and strong electronic effect of Pd and Cu.
在纳米尺度上对结构的掌控，可以有效地调整催化剂的催化性能，极大地提高了液体燃料电氧化反应的电催化性能。在此，我们展示了一种简便的一锅法，成功制备了具有三维开放式纳米笼结构的二元 PdCu 纳米催化剂，其具有高比表面积、易于质量/电子传输和强协同效应等优点。令人印象深刻的是，所得到的三维开放式 PdCu 纳米笼（NCs）在乙醇氧化反应（EOR）中的电催化性能有了很大的提高，其质量活性为 1790.8 mA mg，是商业 Pd/C（536.2 mA mg）的 3.3 倍。此外，PdCu NCs 上 EOR 的比活性（7.7 mA cm）也可与许多基于 Pt 的电催化剂相媲美，表明其电催化活性有了显著提高。二元 PdCu 催化剂的优异电催化性能归因于高度开放的 3D 纳米笼结构和 Pd 和 Cu 的强烈电子效应。
