4.7 Article

Two-Dimensional Amorphous Cobalt Oxide Nanosheets/N-Doped Carbon Composites for Efficient Water Splitting in Alkaline Medium

期刊

ACS APPLIED NANO MATERIALS
卷 5, 期 11, 页码 17022-17032

出版社

AMER CHEMICAL SOC
DOI: 10.1021/acsanm.2c03941

关键词

two-dimensional; amorphous; nanosheets; bifunctional; water splitting

资金

  1. Department of Atomic Energy (DAE)
  2. NISER

向作者/读者索取更多资源

In this study, a 2D amorphous cobalt oxide nanosheet/nitrogen-doped carbon composite was prepared and demonstrated to have excellent catalytic activity, stability, and overall water-splitting performance in alkaline conditions. This catalyst shows great potential for applications in anion exchange membrane water electrolyzers and other renewable energy-based devices.
The development of earth-abundant, inexpensive, and durable noble-metal-free bifunctional electrocatalysts is important to design anion exchange membrane water electrolyzers (AEMWEs). In recent years, tremendous efforts have been carried out to prepare two-dimensional (2D) amorphous noblemetal-free catalysts for alkaline water splitting as they have unique characteristics in catalysis. In this report, a 2D amorphous cobalt oxide nanosheet/nitrogen-doped carbon composite (CoOx/CNx) was prepared for water splitting in the base. The catalyst displays excellent oxygen evolution reaction (OER) activity with 310 mV overpotential at 10 mA/cm(2) current density and 60.7 mV/dec Tafel slope value. The CoOx/CNx also shows very good long-term OER stability in the base. The CoOx/CNx composite also shows moderate hydrogen evolution reaction (HER) activity, and the activity increases with increasing reaction time. We demonstrate that the HER activity increases with increasing HER cycle because of the surface modification of the catalyst. The CoOx/CNx also shows excellent overall water-splitting activity as well as durability. The catalyst possesses high catalytic activity because of its 2D, amorphous sheetlike morphology, strong synergistic interactions, porosity, large electrochemical surface area, and easy access to abundant active sites. Thus, this result may offer a prospect to design a noble metal-free electrocatalyst for AEMWEs and other renewable energy-based devices.

作者

我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。

评论

主要评分

4.7
评分不足

次要评分

新颖性
-
重要性
-
科学严谨性
-
评价这篇论文

推荐

暂无数据
暂无数据