title: Three-dimensional ordered mesoporous Co3O4enhanced by Pd for oxygen evolution reaction.
abstract: Considerable efforts have been devoted recently to design and fabrication of high performance and low cost electrocatalysts for oxygen evolution reaction (OER). However, catalytic activity of current electrocatalysts is usually restricted by high onset potential and limited active sites. Herein, we fabricated three-dimensional (3D) highly ordered mesoporous Pd-Co3O4composite materials as excellent electrocatalysts for OER in alkaline solution with high activity and stability. Three-dimensional highly ordered mesoporous Co3O4material was firstly synthesized using mesoporous silica KIT-6 as hard template. Then, Pd-Co3O4nanomaterials were prepared by a simple reduction method. The as-prepared 3D mesoporous Pd-Co3O4catalysts have ordered mesoporous structure with a high surface area of 81.0 m2g-1. Three-dimensional highly ordered mesoporous structure can facilitate diffusion and penetration of electrolyte and oxygen. Moreover, the catalysts can also keep catalyst particles in a well dispersed condition with more catalytic active sites. Electrochemical measurements reveal that the 3D mesoporous Pd-Co3O4catalysts exhibit superior performance in alkaline solution with low onset potential (0.415 V vs. SCE) and excellent long-duration cycling stability.
authors.affiliation: Guangzhou Key Laboratory for Environmentally Functional Materials and Technology, School of Chemistry and Chemical Engineering, Guangzhou University, Guangzhou 51006, China.
authors.forename: Qing
authors.initials: Q
authors.lastname: Qu
authors.affiliation: Guangzhou Key Laboratory for Environmentally Functional Materials and Technology, School of Chemistry and Chemical Engineering, Guangzhou University, Guangzhou 51006, China.
authors.forename: Jian-Hua
authors.initials: JH
authors.lastname: Zhang
authors.affiliation: Guangzhou Key Laboratory for Environmentally Functional Materials and Technology, School of Chemistry and Chemical Engineering, Guangzhou University, Guangzhou 51006, China.
authors.forename: Jing
authors.initials: J
authors.lastname: Wang
authors.affiliation: Guangxi Key Laboratory of Low Carbon Energy Materials, School of Chemistry and Pharmaceutical Sciences, Guangxi Normal University, Guilin, 541004, China.
authors.forename: Qing-Yu
authors.initials: QY
authors.lastname: Li
authors.affiliation: Guangzhou Key Laboratory for Environmentally Functional Materials and Technology, School of Chemistry and Chemical Engineering, Guangzhou University, Guangzhou 51006, China.
authors.forename: Chang-Wei
authors.initials: CW
authors.lastname: Xu
authors.affiliation: MOE of the Key Laboratory of Bioinorganic and Synthetic Chemistry, School of Chemistry and Chemical Engineering, Sun Yat-Sen University, Guangzhou 510275, China.
authors.forename: Xihong
authors.initials: X
authors.lastname: Lu