Issue 38, 2024

Photo-nanozyme coupling catalyzes glucose oxidation for high-performance enzymatic biofuel cells

Abstract

Glucose biofuel cells (GBFCs) are special energy conversion devices using naturally abundant glucose as fuel. However, achieving high power output and stability remains a challenge in existing GBFCs. In this study, we created a photoelectric coupling nanozyme catalyst of Au/BiVO4 with triple synergistic promotion effects: the surface plasmon resonance of Au significantly broadened the photo-absorption region, enhanced the light absorption intensity, and increased the carrier density of BiVO4; furthermore, the outstanding electron transfer capacity of Au accelerated the photoelectron separation from the vacancies in BiVO4, endowing BiVO4 with excellent photo-corrosion resistance; additionally, the three-dimensional structure of BiVO4 provides abundant sites for Au, remarkably improving the loading and catalytic stability of Au. Consequently, the Au/BiVO4 catalytic GBFC can simultaneously convert solar and chemical energy stored in glucose into electrical energy, providing an extraordinarily high power density and open-circuit voltage (575 μW cm−2 and 0.86 V) and working steadily for 20 hours. Altogether, high power output and high stability are achieved in the Au/BiVO4 catalytic GBFC. Thus, this study will significantly propel the development of GBFCs through the innovative application of the photoelectric coupling nanozyme catalytic strategy.

Graphical abstract: Photo-nanozyme coupling catalyzes glucose oxidation for high-performance enzymatic biofuel cells

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Article information

Article type
Paper
Submitted
05 jul 2024
Accepted
25 aug 2024
First published
29 aug 2024

J. Mater. Chem. A, 2024,12, 25784-25790

Photo-nanozyme coupling catalyzes glucose oxidation for high-performance enzymatic biofuel cells

D. Hu, Q. Su, Y. Gao, J. Zhang, L. Wang and J. Zhu, J. Mater. Chem. A, 2024, 12, 25784 DOI: 10.1039/D4TA04675G

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