Catalytic methane combustion over iron/nitrogen-doped silicon carbide
Catalytic methane combustion over iron/nitrogen-doped silicon carbide
复制标题
DOI：
10.1039/c6ra16318a
复制
发表时间：
2016-09
期刊：
影响因子：
3.9
通讯作者：
H. Koshikawa;Shuji Nakanishi;K. Hashimoto;K. Kamiya
中科院分区：
文献类型：
--
作者：
H. Koshikawa;Shuji Nakanishi;K. Hashimoto;K. Kamiya
将Fe沉积的碳化硅在900℃的氨气气氛中处理3h，合成了Fe(Fe)和N(N)改性碳化硅(Fe/N-SiC)作为甲烷(CH4)燃烧催化剂.在500℃下，Fe/N-碳化硅的甲烷燃烧速率是不含N原子的Fe-碳化硅催化剂的3倍.X射线吸收光谱和X-射线光电子能谱分析表明，Fe/N-碳化硅以原子形式存在，并与N原子配位.催化剂中N-连接的Fe中心可能促进了分子氧的活化，生成的活性氧物种可能与CH4反应，从而提高了CH4的燃烧活性。
We synthesized iron (Fe) and nitrogen (N)-modified silicon carbide (Fe/N–SiC) as a novel methane (CH4) combustion catalyst by annealing Fe-deposited SiC under an ammonia atmosphere at 900 °C for 3 h. The rate of CH4 combustion over Fe/N–SiC was 3 times higher than that over Fe–SiC (without N atoms) at 500 °C. Extended X-ray absorption fine structure and X-ray photoelectron spectroscopy analyses of Fe/N–SiC revealed that Fe was atomically distributed and coordinated to N atoms. N-Ligated Fe centers in the catalyst might facilitate the activation of molecular oxygen, and the generated active oxygen species likely react with CH4, resulting in the enhancement of CH4 combustion activity over Fe/N–SiC.