Oxygen reduction activity of N-doped carbon-based films prepared by pulsed laser deposition
Oxygen reduction activity of N-doped carbon-based films prepared by pulsed laser deposition
复制标题
DOI：
10.1016/j.apsusc.2010.08.095
复制
发表时间：
2010-12
影响因子：
6.7
通讯作者：
T. Hakoda;S. Yamamoto;K. Kawaguchi;T. Yamaki;Kobayashi Tomohiro;M. Yoshikawa
中科院分区：
文献类型：
--
作者：
T. Hakoda;S. Yamamoto;K. Kawaguchi;T. Yamaki;Kobayashi Tomohiro;M. Yoshikawa
在玻璃碳（GC）基底上制备表面具有氮物质的碳基薄膜，用作聚合物电解质燃料电池的非铂阴极催化剂。采用脉冲激光沉积法在氮气存在下沉积钴和碳，然后通过 HCl 清洗处理去除金属 Co。使用旋转圆盘电极系统以电化学方式测定氧还原反应 (ORR) 活性，其中 GC 基板上的薄膜样品是可更换的。 ORR 活性随着沉积过程中 GC 基底温度的升高而增加。在 600°C、66.7Pa 的 N2 存在下制备的碳基薄膜在测试样品中表现出最高的 ORR 活性（0.66V vs. NHE）。该薄膜由表面掺杂有吡啶型氮原子的无定形碳组成。
Carbon-based films with nitrogen species on their surface were prepared on a glassy carbon (GC) substrate for application as a non-platinum cathode catalyst for polymer electrolyte fuel cells. Cobalt and carbon were deposited in the presence of N2gas using a pulsed laser deposition method and then the metal Co was removed by HCl-washing treatment. Oxygen reduction reaction (ORR) activity was electrochemically determined using a rotating disk electrode system in which the film samples on the GC substrate were replaceable. The ORR activity increased with the temperature of the GC substrate during deposition. A carbon-based film prepared at 600°C in the presence of N2at 66.7Pa showed the highest ORR activity among the tested samples (0.66V vs. NHE). This film was composed of amorphous carbons doped with pyridine type nitrogen atoms on its surface.