Superstructured Macroporous Carbon Rods Composed of Defective Graphitic Nanosheets for Efficient Oxygen Reduction Reaction,Advanced Science

当前位置： X-MOL 学术 › Adv. Sci. › 论文详情

Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)

Superstructured Macroporous Carbon Rods Composed of Defective Graphitic Nanosheets for Efficient Oxygen Reduction Reaction
Advanced Science ( IF 14.3 ) Pub Date : 2021-07-29 , DOI: 10.1002/advs.202100120
Jing Wang _{1,

2} , Yining Yao ₁ , Chaoqi Zhang ₁ , Qiang Sun _{3,

4} , Dan Cheng ₅ , Xiaodan Huang ₅ , Jiayou Feng ₁ , Jingjing Wan ₁ , Jin Zou _{3,

4} , Chao Liu ₁ , Chengzhong Yu _{1,

5}

Affiliation

Rationally designed carbon materials with superstructures are promising candidates in applications such as electrocatalysis. However, the synthesis of highly porous carbon superstructures with macropores and carbon defects from a simple crystalline solid remains challenging. In this work, superstructured macroporous carbon rods composed of defective graphitic nanosheets are synthesized by direct carbonization of crystalline poly tannic acid (PTA) rods as precursors. During carbonization, PTA rods with a highly ordered lamellar structure induce a spatially confined two-step localized contraction that takes place in different dimensions and directions in each step. The unexpected contraction behavior results in the sponge-like macroporous carbon superstructure with large surface area, high porosity, and abundant defects, thus showing a superior electrocatalytic performance with high activity and selectivity for oxygen reduction reaction. The study provides new understandings in the design of functional carbon materials with distinctive structures and applications.

中文翻译：

由缺陷石墨纳米片组成的超结构大孔碳棒用于高效氧还原反应

具有超结构的合理设计的碳材料是电催化等应用中最有前途的候选材料。然而，从简单的结晶固体合成具有大孔和碳缺陷的高度多孔碳超结构仍然具有挑战性。在这项工作中，通过直接碳化结晶聚单宁酸（PTA）棒作为前体，合成了由有缺陷的石墨纳米片组成的超结构大孔碳棒。在碳化过程中，具有高度有序层状结构的 PTA 棒会引起空间受限的两步局部收缩，该收缩在每个步骤中以不同的维度和方向发生。这种意想不到的收缩行为导致海绵状大孔碳超结构具有大表面积、高孔隙率和丰富的缺陷，从而表现出优异的电催化性能，对氧还原反应具有高活性和选择性。该研究为具有独特结构和应用的功能碳材料的设计提供了新的认识。

更新日期：2021-09-22

点击分享查看原文

点击收藏

公开下载

阅读更多本刊最新论文本刊介绍/投稿指南11