Mesoporous Co3O4 as an electrocatalyst for water oxidation  

作　　者：itHarun Tueysuez Yun Jeong Hwang Sher Bahadar Khan Abdullah Mohamed Asiri Peidong Yang 

机构地区：[1]Department of Chemistry, University of California, Berkeley, California 94720, USA [2]The Center of Excellence forAdvanced Materials Research (CEAMR), Chemistry Department, King Abdulaziz University, Jeddah 21589, Saudi Arabia

出　　处：《Nano Research》2013年第1期47-54,共8页纳米研究（英文版）

摘　　要：MesoporousCo3O4 has been prepared using porous silica as a hard template via a nanocasting route and its electrocatalytic properties were investigated as an oxygen evolution catalyst for the electrolysis of water. The ordered mesostructured Co3O4 shows dramatically increased catalytic activity compared to that of bulk Co3O4. Enhanced catalytic activity was achieved with high porosity and surface area, and the water oxidation overpotential （η） of the ordered mesoporous Co3O4 decreases significantly as the surface area increases. The mesoporous Co3O4 also shows excellent structural stability in alkaline media. After 100 min under 0.8 V （versus Ag/AgC1） applied bias, the sample maintains the ordered mesoporous structure with little deactivation of the catalytic properties.Mesoporous Co3O4 经由一条 nanocasting 线路作为一个难模板用多孔的硅石被准备了，它的 electrocatalytic 性质为水的电解作为氧进化催化剂被调查。订的 mesostructured Co3O4 表演戏剧性地与体积 Co3O4 的相比增加了催化活动。提高的催化活动与高孔和表面被完成区域，和水氧化过电位() 当表面区域增加，订的 mesoporous， Co3O4 显著地减少。mesoporous Co3O4 也在碱的媒介显示出优秀结构的稳定性。在在 0.8 V 下面的 100 min 以后(对 Ag/AgCl ) 应用偏爱，样品与催化性质的很少释放维持订的 mesoporous 结构。

关 键 词：water oxidation ELECTROCATALYST ordered mesoporousmaterials NANOCASTING 

分 类 号：TQ138.12[化学工程—无机化工] TQ127.2