TiO2 nanofibers heterogeneously wrapped with reduced graphene oxide as efficient Pt electrocatalyst supports for methanol oxidation
TiO2 nanofibers heterogeneously wrapped with reduced graphene oxide as efficient Pt electrocatalyst supports for methanol oxidation
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异质包裹还原氧化石墨烯的 TiO2 纳米纤维作为甲醇氧化的高效 Pt 电催化剂载体
DOI：
10.1016/j.ijhydene.2015.01.042
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发表时间：
2015-03
影响因子：
7.2
通讯作者：
Hanjie Ying
中科院分区：
文献类型：
--
作者：
Xiaohua Lu;Linghong Lu;Xiaojing Liu;Hanjie Ying
开发先进的催化剂载体是获得高活性和耐久性电催化剂的一条很有前途的途径。本论文采用简易沉积和水热法制备了h-rGO@TiO2-rGO多相包裹还原石墨烯氧化物(RGO)的二氧化钛纳米纤维，并将其作为甲醇氧化用铂纳米颗粒的载体。用透射电子显微镜、X射线衍射仪、拉曼光谱、循环伏安法和计时电流法对催化剂的形貌和电催化性能进行了表征。负载在h-rGO@TiO2rGO上的铂纳米粒子分散均匀，平均粒径为3.4 nm。与铂/rGO和铂/二氧化钛相比，铂/h-rGO@TiO2-rGO的电催化活性和稳定性均有显著提高。这种增强来自于多孔结构，它促进了铂纳米粒子的均匀分散，并扩大了铂纳米粒子的电化学活性表面积(ECSACO=30.95m2g−1)。因此，h-rGO@TiO2-rGO杂化材料有望成为燃料电池的电催化剂载体材料。
The exploration of advanced catalyst supports is a promising route to obtain electrocatalysts with high activity and durability. Herein, TiO2nanofibers heterogeneously wrapped with reduced graphene oxide (rGO) designated as h-rGO@TiO2-rGO were synthesized by a facile deposition and hydrothermal method and served as support for Pt nanoparticles (Pt NPs) used for methanol oxidation. The morphology and electrocatalytic properties of the catalysts were investigated by transmission electron microscopy, X-ray diffraction, Raman spectroscopy, cyclic voltammetry, and chronoamperometry. Pt NPs supported on h-rGO@TiO2-rGO showed uniform dispersion with a mean particle size of 3.4 nm. The electrocatalytic activity and stability of Pt/h-rGO@TiO2-rGO both improved remarkably compared with Pt/rGO and Pt/TiO2. This enhancement originated from the porous structure that promoted the homogeneous dispersion and enlarged the electrochemical active surface area (ECSA) of Pt NPs (ECSACO= 30.95 m2g−1). Thus, the h-rGO@TiO2-rGO hybrid could be developed as a promising electrocatalyst support material in fuel cells.
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影响因子：
4.9
作者：
Ding, Shujiang;Chen, Jun Song;Lou, Xiong Wen (David)
通讯作者：
Lou, Xiong Wen (David)
影响因子：
9.5
作者：
Qiu, Jingxia;Zhang, Peng;Zhang, Shanqing
通讯作者：
Zhang, Shanqing
影响因子：
17.1
作者：
Etacheri, Vinodkumar;Yourey, Joseph E.;Bartlett, Bart M.
通讯作者：
Bartlett, Bart M.
DOI：
10.1002/cphc.201100984
发表时间：
2012-04
期刊：
Chemphyschem : a European journal of chemical physics and physical chemistry
影响因子：
--
作者：
Nadine Menzel;E. Ortel;R. Kraehnert;P. Strasser
通讯作者：
Nadine Menzel;E. Ortel;R. Kraehnert;P. Strasser
影响因子：
7.2
作者：
M. K. Kumar;N. S. Jha;S. Mohan;S. Jha
通讯作者：
M. K. Kumar;N. S. Jha;S. Mohan;S. Jha