硼掺杂碳化硅负载Pt催化剂的甲醇电催化氧化性能

董莉莉; 童希立; 王英勇; 靳国强; 郭向云

硼掺杂碳化硅负载Pt催化剂的甲醇电催化氧化性能

1.
中国科学院山西煤炭化学研究所煤转化国家重点实验室, 山西太原 030001;
2.
中国科学院大学, 北京 100049

基金项目: 国家自然科学基金青年科学基金（21203233）；山西省青年科技研究基金（2013021011-6）。

详细信息

通讯作者:
童希立，Tel/Fax：+86-351-4065282，E-mail：tongxili@sxicc.ac.cn。

中图分类号: O643;O646
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出版历程
- 收稿日期: 2013-12-19
- 修回日期: 2014-03-14
- 刊出日期: 2014-07-30

Boron-doped silicon carbide supported Pt catalyst for methanol electrooxidation

1.
State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan 030001, China;
2.
University of Chinese Academy of Sciences, Beijing 100049, China

摘要

摘要: 以硼掺杂碳化硅（B_0.1SiC）为载体，采用循环伏安法在B_0.1SiC载体上电沉积Pt纳米粒子制备了Pt/B_0.1SiC催化剂。利用X射线光电子能谱、X射线衍射、氮气吸附-脱附、扫描电镜及透射电镜等测试方法对催化剂的晶型、表面性质及形貌进行了表征。结果表明，硼原子掺杂进入SiC晶格并取代了Si 位点，使B_0.1SiC载体的导电性增强；Pt纳米粒子均匀地分布在B_0.1SiC载体上，平均粒径为2.7 nm。与相同条件下制备的Pt/SiC催化剂相比，Pt/B_0.1SiC具有较大的电化学活性表面积、更高的甲醇催化氧化活性和稳定性。
- 甲醇电氧化 /
- 硼掺杂碳化硅 /
- Pt催化剂
Abstract: Boron-doped silicon carbide (B_0.1SiC) synthesized by the carbothermal reduction method was used as support to prepare Pt/B_0.1SiC catalyst by cyclic voltammtric deposition of Pt nanoparticles. The crystal structure, surface property and morphology of the catalysts were studied with X-ray diffraction, X-ray photoelectron spectroscopy, scanning electron microscopy and transmission electron microscopy techniques and N₂ adsorption-desorption experiment. It is shown that B atoms have been incorporated into the SiC lattice sites by substituting Si,which increases the electrical conductivity of SiC. Pt nanoparticles uniformly dispersed on the B_0.1SiC support with an average size of 2.7 nm. The prepared Pt/B_0.1SiC had a larger electrochemically active area and exhibited higher electrocatalytic activity and stability for methanol oxidation than the Pt/SiC synthesized by the same method. This shows that B-doped SiC is a promising support for preparing high-performance methanol oxidation electrocatalysts.
- methanol electrooxidation /
- B-doped SiC /
- Pt catalyst

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