Boron and nitrogen co-doped carbon dots for boosting electrocatalytic oxygen reduction

被引：28

作者：

Liu, Hui ^{[1
]}

Liu, Zi-hui ^{[1
]}

Zhang, Jin-qiang ^{[2
]}

Zhi, Lin-jie ^{[3
]}

Wu, Ming-bo ^{[1
]}

机构：

[1] China Univ Petr East China, Coll New Energy, Coll Chem Engn, State Key Lab Heavy Oil Proc, Qingdao 266580, Peoples R China

[2] Edith Cowan Univ, Sch Engn, 270 Joondalup Dr, Joondalup, WA 6027, Australia

[3] China Univ Petr East China, Coll New Energy, Qingdao 266580, Peoples R China

来源：

NEW CARBON MATERIALS | 2021年 / 36卷 / 03期

基金：

中国国家自然科学基金;

关键词：

Carbon dots; Boron doping; Nitrogen doping; Oxygen reduction reaction; GRAPHENE QUANTUM DOTS; NANODOTS; CAPACITY; SIZE;

D O I：

10.1016/S1872-5805(21)60043-4

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Carbon dots (CDs) have become an emerging carbon nanomaterial for use in energy-conversion systems because of their large surface area and rapid electron transfer. Carbon dots (BN-CDs) doped with both boron and nitrogen were synthesized by a simple one-step electrochemical etching approach using low-cost petroleum coke as precursor. Compared with CDs doped with only B or N, BN-CDs showed an excellent four-electron oxygen reduction reaction (ORR) activity with a positive onset potential of 0.958 V and a large diffusion-limited current density of - 4.32 mA cm(-2). Furthermore, the long-term stability and methanol tolerance of BN-CDs were better than those of a commercial Pt/C catalyst. It was found by density functional theory (DFT) calculation that the co-doping of N and B promoted the adsorption of O-2 molecules in the ORR process. This work provides new insight into the rational design of carbon nanomaterials and their use in energy conversion.

引用

页码：585 / 592

页数：8

共 33 条

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