催化作用
生物电化学
电化学
微生物燃料电池
化学
电催化剂
阴极
纳米技术
碳纤维
电化学能量转换
材料科学
化学工程
电极
物理化学
有机化学
复合材料
工程类
复合数
阳极
作者
Shixuan Zhang,Donghao Li,Jiwei Jiang,Fengxiang Li,Tao Hua
标识
DOI:10.1016/j.electacta.2022.141543
摘要
The oxygen reduction reaction (ORR) is important in the field of energy conversion. Single-atom (SA) catalysts (SACs) exhibit good ORR catalytic effects and are widely used in electrocatalysis. Herein, we broaden the application of SACs in the field of bioelectrochemistry and study their electrocatalytic performance in air-cathode microbial fuel cells (MFCs). In this study, a platinum (Pt) SA-skin catalyst, boron-nitride-carbon (BCN) nanosheet with densely accessible Pt-N4 moieties named Pt SAs-BCN, was prepared by electrochemical deposition, which is more beneficial for large-scale industrial preparation of SACs. The obtained Pt SAs-BCN offered numerous active sites with adequate exposure, resulting in highly efficient and stable ORR activity. The participation of trace Pt SAs strengthens the electrocatalytic performance of BCN and reduces its charge transfer resistance. Remarkably, when employed as an air cathode in MFCs, the Pt SAs-BCN-modified MFC exhibited a maximum power generation capacity of 0.425 V and a maximum power density of 936.31 mW cm−2, while being able to run for two months without a violent performance drop. The application of SACs in the field of bioelectrochemistry achieves the purpose of energy conversion and has great potential for the bioelectrodegradation of organics.
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