Mo Yanshan, Feng Shouquan, Yu Tianqi, Chen Jinli, Qian Guangfu, Luo Lin, Yin Shibin
College of Chemistry and Chemical Engineering, School of Physical Science and Technology, State Key Laboratory of Processing for Non-Ferrous Metal and Featured Materials, Guangxi University, 100 Daxue Road, Nanning 530004, China.
College of Chemistry and Chemical Engineering, School of Physical Science and Technology, State Key Laboratory of Processing for Non-Ferrous Metal and Featured Materials, Guangxi University, 100 Daxue Road, Nanning 530004, China.
J Colloid Interface Sci. 2022 Feb;607(Pt 2):1928-1935. doi: 10.1016/j.jcis.2021.10.010. Epub 2021 Oct 6.
PtNi alloy nanoparticles display promising catalytic activity for oxygen reduction reaction (ORR), while the Ostwald ripening of particles and the dissolution/migration of surface atoms greatly affect its stability thus restricting the application. Herein, the WO-surface modified PtNi alloy nanowires (WO-PtNi NWs) exhibiting enhanced ORR catalytic property is reported, which has high aspect ratio with the diameter of only 2 ∼ 3 nm. It is found that the WO-PtNi NWs shows a volcano relationship between the ORR activity and the content of WO. The WO-PtNi NWs has the best performance among all the synthesized catalysts. Its mass activity (0.85 A mg) is reduced by only 23.89% after 30k cycles durability test, which is much more stable than that of PtNi NWs (0.33 A mg, 45.94%) and Pt/C (0.14 A mg, 57.79%). Hence this work achieves an effective regulation of the ORR activity for PtNi alloy NWs by the synergistic effect of WO on Pt.
铂镍合金纳米颗粒对氧还原反应（ORR）显示出有前景的催化活性，然而颗粒的奥斯特瓦尔德熟化以及表面原子的溶解/迁移极大地影响其稳定性，从而限制了其应用。在此，报道了具有增强的ORR催化性能的WO表面修饰的铂镍合金纳米线（WO-PtNi NWs），其具有高纵横比，直径仅为2至3纳米。发现WO-PtNi NWs在ORR活性与WO含量之间呈现火山关系。WO-PtNi NWs在所有合成催化剂中表现最佳。其质量活性（0.85 A mg）在30k次循环耐久性测试后仅降低23.89%，比铂镍纳米线（0.33 A mg，45.94%）和铂碳（0.14 A mg，57.79%）稳定得多。因此，这项工作通过WO对铂的协同作用实现了对铂镍合金纳米线ORR活性的有效调控。
