Facile Combustion Synthesis of Carbon-Supported Titanium Oxynitride to Catalyse Oxygen Reduction Reaction in Acidic Media
Facile Combustion Synthesis of Carbon-Supported Titanium Oxynitride to Catalyse Oxygen Reduction Reaction in Acidic Media
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DOI：
10.1016/j.electacta.2015.03.211
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发表时间：
2015-11
影响因子：
6.6
通讯作者：
M. Chisaka;Y. Ando;H. Muramoto
中科院分区：
文献类型：
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作者：
M. Chisaka;Y. Ando;H. Muramoto
以炭黑为载体，采用一种简便的合成方法制备了氮掺杂的TiO 2（TiOxNy-C）催化剂，在酸性介质中催化氧还原反应，且不生成体积较大的TiN。该协议涉及修改一个廉价的“溶液相燃烧”的过程中用于生产氮和氟共掺杂二氧化钛光催化剂。无氟TiOxNy颗粒成功地负载在碳上，通过添加碳载体的前体分散体含有四氟化钛和尿素在523 K搅拌，然后热解下N2气作为光催化剂合成的修改。催化剂的活性与热解温度有关，在1073-1123 K的热解温度下，催化剂的活性最高。活性中心为含氧缺陷的氮掺杂金红石型TiO 2。所开发的合成路线所需的时间不到我们以前的协议，利用两步热解下的H2/O2/N2气体和NH3-气体的混合物的一半，也是显着更经济。
A facile route for synthesis of nitrogen-doped TiO2supported on carbon black (TiOxNy–C) to catalyse oxygen reduction reaction in acidic media, was developed without forming bulky TiN. This protocol involved modification of an inexpensive “solution phase combustion” process used for production of nitrogen and fluorine codoped TiO2photocatalysts. Fluorine-free TiOxNyparticles were successfully supported on carbon by adding the carbon support to the precursor dispersion containing titanium tetrafluoride and urea with stirring at 523 K, followed by pyrolysis under N2gas as a modification of the photocatalyst synthesis. The catalyst activity depended on the pyrolysis temperature, where the optimal activity was achieved by pyrolysis at 1073–1123 K. The active sites are proposed to be rutile TiO2doped with nitrogen atoms containing oxygen defects. The developed synthesis route requires less than half of the time required for our previous protocol utilizing two-step pyrolysis under a mixture of H2/O2/N2gas and NH3-gas and is also significantly more economical.