三元运算
催化作用
铂金
质子交换膜燃料电池
电催化剂
电化学
合金
化学工程
纳米线
材料科学
阴极
溶解
化学
氧还原反应
无机化学
纳米技术
冶金
电极
物理化学
有机化学
程序设计语言
工程类
计算机科学
作者
Giday Fisseha,Yiping Hu,Yanan Yu,Shaojie Li,Dongsheng Ma,Pei Nian,Zheng Wang,Qin Yue
标识
DOI:10.1016/j.cclet.2023.108445
摘要
Achieving high activity and durability for the oxygen reduction reaction (ORR) with an ultra-low amount of platinum is significant to promote the widespread application of proton exchange membrane fuel cells (PEMFCs). Here we report a new ternary PtNiGa alloy nanowires (PtNiGa NWs) electrocatalyst, in which the presence of gallium (Ga) enhances the oxidation resistance of platinum (Pt) and nickel (Ni) and suppresses the dissolution of Ni. The mass and specific activities of PtNiGa NWs are about 11.2 and 7.6 times higher than those of commercial Pt/C catalysts for ORR. Moreover, the mass activity of PtNiGa/C NWs nanocatalyst decreased only by 12.8% and largely retained its electrochemical surface area (ECSA) after 10000 potential cycles, compared with 38% loss of ECSA for commercial Pt/C catalyst. Therefore, this work provides a general guideline for preparing ternary alloy electrocatalysts and enhancing the activity and stability of the cathode ORR reaction of PEMFCs.
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