A Direct Ammonia Microfluidic Fuel Cell using NiCu Nanoparticles Supported on Carbon Nanotubes as an Electrocatalyst
A Direct Ammonia Microfluidic Fuel Cell using NiCu Nanoparticles Supported on Carbon Nanotubes as an Electrocatalyst
复制标题
使用碳纳米管负载的镍铜纳米颗粒作为电催化剂的直接氨微流体燃料电池
DOI：
10.1002/cssc.201801232
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发表时间：
2018
期刊：
影响因子：
8.4
通讯作者：
Leung Dennis Y. C.
中科院分区：
文献类型：
--
作者：
Zhang Hui Min;Wang Yi Fei;Kwok Yu Ho;Wu Zu Cheng;Xia De Hua;Leung Dennis Y. C.
采用水热法制备不同Ni/Cu质量比（70:30、50:50和30:70）的NiCu电催化剂，研究了其在氨氧化反应中的电化学行为和直接氨微流控燃料电池（DAMFC）的性能。XRD和SEM - EDX表征了NiCu合金的形成，TEM表征了晶粒尺寸为15 ~ 20 nm。循环伏安法和计时安培法表明，NiCu的催化活性高于纯Ni和纯Cu，活性物质为NiCu氢氧化物。在DAMFC测试中，发现50wt % Ni50Cu50/CNTs是最合适的，因为它比Ni电极的峰值功率密度高43%，最大电流密度高65%。NiCu氧化氢氧化物的形成，通过增加活性位点的数量和Ni - Cu双金属催化剂的联合电子效应，提高了阳极催化活性。
This work demonstrates the use of a NiCu electrocatalyst prepared by hydrothermal method with different Ni/Cu mass ratios (70:30, 50:50 and 30:70) supported on carbon nanotubes (CNTs), which was studied with regards to its electrochemical behavior in the ammonia oxidation reaction and direct ammonia microfluidic fuel cell (DAMFC) performance. XRD and SEM‐EDX showed the formation of NiCu alloy while TEM showed the particles size to be 15–20 nm. Cyclic voltammetry and chronoamperometry showed that NiCu had higher catalytic activity than pure Ni and pure Cu, and that the active species was a NiCu oxyhydroxide. In DAMFC tests, 50 wt % Ni50Cu50/CNTs was found to be the most suitable one since it showed a 43 % higher peak power density and 65 % higher maximum current density than Ni electrode. The improved performance was attributed to the NiCu oxyhydroxides formation, which improved the anodic catalytic activity by increasing amounts of active sites and the combined electronic effect of the Ni‐Cu bimetallic catalysts.