期刊
ACS CATALYSIS
卷 11, 期 5, 页码 2949-2955出版社
AMER CHEMICAL SOC
DOI: 10.1021/acscatal.0c04797
关键词
cuprous oxide; electrocatalysis; enzyme-free biosensors; facet-dependent mechanism; wearable biofuel cells
资金
- National Natural Science Foundation of China [22074010, 21705014]
- Dalian Science and Technology Bureau, China [2019J12SN54]
- Zhang Dayu School of Chemistry, Dalian University of Technology, China
Recent developments in utilizing electrocatalysis for wearable enzyme-free biosensors and biofuel cells have shown that facet-controlled cuprous oxide nanostructures, particularly cuboctahedral Cu2O with a hollow structure, exhibit optimal sensing performance for glucose detection. The facet-dependent sensing process reveals that Cu2O{100} and Cu2O{111} facets are beneficial in improving interaction with enzyme-free substrates and accelerating electron transfer.
Exploiting electrocatalysis for wearable enzyme-free biosensors and biofuel cells has recently greatly developed in preliminary medical diagnosis and human healthcare fields. Herein, several facet-controlled cuprous oxide (Cu2O) nanostructures have been systematically fabricated to investigate the facet-dependent electrocatalysis mechanism. As a result, cuboctahedral Cu2O with a hollow structure exhibits optimal sensing performance for glucose detection compared with octahedral or extended hexapod Cu2O. The facet-dependent sensing process reveals that Cu2O{100} and Cu2O{111} facets are helpful in acquiring a higher interaction with enzyme-free substrates and accelerating electron transfer, respectively, to improve electrocatalytic activity. As a proof of concept, combined with a portable wireless device, wearable Cu2O enzymefree biofuel cell systems can achieve glucose sensing by both open circuit potential and power output signals, which would potentially be used for a wearable enzyme-free energy platform. Therefore, this wearable enzyme-free smart sensing concept would help in the targeted establishment of biomarker electrocatalysts, and further offers considerable promise for the development of biofuel cells in the wearable healthcare monitoring field.
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