Zhang Jin, Ma Jia Hao, Bai Jingyuan, Yang Dalong, Zhang Meilin, Yang Zhou, Fan Longyi, Chen Xiao Lin, Guan Ren Guo
Engineering Research Center of Continuous Extrusion, Ministry of Education, Dalian Jiaotong University Dalian 116028 P. R. China
State Key Laboratory of Solidification Processing, Center of Advanced Lubrication and Seal Materials, Northwestern Polytechnical University Xi'an Shaanxi 710072 P. R. China.
RSC Adv. 2021 Sep 10;11(48):30215-30221. doi: 10.1039/d1ra04770a. eCollection 2021 Sep 6.
Although nanoporous materials have been fabricated by electrodeposition using micelles of P-123 as structure-directing entities, the possible geometry obtained has been limited to nanoporous films. Herein, a novel dual-template assisted electrodeposition method to fabricate Cu/CuO porous nanowires (PNs) using polymeric micelles as a soft template and polycarbonate membranes as a hard template is reported. These nanowires consist of a porous skeleton with nanosized pores of 20 nm on average and crystallized ligaments. Morphology, composition, and crystal structure are systematically investigated and the formation mechanism is discussed. The as-deposited Cu/CuO PNs are found to exhibit high electrocatalytic activity toward electroreduction of nitrate. At an applied cathodic potential of 0.53 V the reference reversible hydrogen electrode, the selectivity for NH conversion is 37.3%. Our approach is anticipated to work for the synthesis of PNs of other materials that could be obtained electrochemical means.
尽管已经通过使用P - 123胶束作为结构导向实体的电沉积方法制备了纳米多孔材料，但所获得的可能几何形状仅限于纳米多孔膜。在此，报道了一种新颖的双模板辅助电沉积方法，该方法使用聚合物胶束作为软模板和聚碳酸酯膜作为硬模板来制备Cu/CuO多孔纳米线（PNs）。这些纳米线由平均孔径为20 nm的纳米级孔隙和结晶韧带组成的多孔骨架构成。系统地研究了其形态、组成和晶体结构，并讨论了形成机理。发现沉积态的Cu/CuO PNs对硝酸盐的电还原表现出高电催化活性。在相对于可逆氢电极施加0.53 V的阴极电位下，NH转化的选择性为37.3%。预计我们的方法可用于合成其他可通过电化学手段获得的材料的PNs。
