YU Jiemei1, 2 ， HUANG Taizhong2 ， HAN Jitian1 ， QIN Fengxiao2
（1. School of Energy and Power Engineering， Shandong University， Jinan 250061， China; 2. School of Chemistry and Chemical Engineering， University of Jinan， Jinan 250022， China）
Abstract： Pt -TiO2 -reduced graphene oxide composite materials with high oxygen reduction catalytic activity were prepared. Composition and structure of the composite materials were characterized by XRD, SEM, TEM, HRTEM and RM. The results show that the graphene oxide is reduced， and Pt and TiO2 nano-particles are evenly distributed on the reduced graphene oxide to form Pt -TiO2 -reduced graphene oxide composite materials. The onset potential of oxygen reduction under the Pt-TiO2-reduced graphene oxide composite materials is about -0.20 V, the exchange current density obtained by Koutecky-Levich theory is 10-6~10-5m A/cm2. The current still remains more than 88% of their initial after chronoamperometric test for 16 000 s.
Keywords: titania; graphene oxide; nano-composite materials; oxygen reduction reaction
中图分类号：O614.4 文献标志码：A
文章编号：1008-5548（2015）04-0048-05
DOI:10.13732/j.issn.1008-5548.2015.04.011
收稿日期：2015-02-27， 在线出版时间：2015-08-26。
基金项目：国家自然科学基金项目，编号：51376110；山东省自然科学基金项目，编号：ZR2012BQ027；山东省优秀中青年科学家科研奖励基金项目，编号：BS2011CL005；山东省高等学校科研发展计划项目，编号：J11LD02；济南大学自然科学基金项目，编号：XKY0912。
第一作者简介：于洁玫(1978—)，女，讲师，博士研究生，研究方向为催化新材料。 电话：0531-89736983，E-mail：chm_yujm@ujn.edu.cn。
通信作者简介：韩吉田(1961—)，男，博士，教授，研究方向为新能源。E-mail：jthan@sdu.edu.cn。
