催化作用
电催化剂
锰
纳米颗粒
热解
碳纤维
甲醇
化学
电化学
化学工程
金属
无机化学
材料科学
纳米技术
复合数
电极
有机化学
物理化学
复合材料
工程类
作者
Guang‐Lan Li,Li-Fang Yuan,Guang-Chun Cheng,Si-Mei Chen,Cai-Di Liu,Wenwen Chen,Baofeng Yang,Xin‐Biao Xu,Ce Hao
标识
DOI:10.1016/j.apsusc.2018.04.143
摘要
Controllable growth of uniform nanoparticles with specific morphology to obtain high active electrocatalyst is a key common problem in developing efficient energy conversion and storage devices. In this work, a tangerine peel-derived carbon (TPC) supported mixed manganese oxides (MnOx/TPC) was synthesized for oxygen reduction reaction (ORR) through a facile pyrolysis procedure. By making full use of the confinement effect of tangerine peel cells, the MnOx nanoparticles of MnOx/TPC-800 are obtained with a components of Mn(II), Mn(III) and Mn(IV) with cubic morphology of about 15 nm and evenly dispersed on the TPC surface. Electrochemistry measurements show that MnOx/TPC-800 demonstrates excellent ORR performance with a comparable half-wave potential to commercial Pt/C and a high onset potential with a dominant 4e− catalytic process, superior stability, and remarkable immunity to methanol crossover effect in alkaline media. The synergy effect between multi-oxidation states MnOx and TPC of MnOx/TPC-800 is proved to play significant factor for its high ORR performance. This study provides a valuable and rational strategy to construct morphology-controlled metal nanoparticles with unique carbon materials in developing cost-effective catalysts for fuel cells and metal air batteries.
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