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.

中文翻译：

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光纳米酶耦合催化葡萄糖氧化用于高性能酶生物燃料电池


葡萄糖生物燃料电池（GBFC）是一种特殊的能量转换装置，使用天然丰富的葡萄糖作为燃料。然而，实现高功率输出和稳定性仍然是现有 GBFC 的挑战。在本研究中，我们创建了一种具有三重协同促进效应的Au/BiVO ₄光电耦合纳米酶催化剂：Au的表面等离子体共振显着拓宽了光吸收区域，增强了光吸收强度，并增加了BiVO ₄的载流子密度;此外，Au优异的电子传输能力加速了BiVO ₄中空位的光电子分离，使BiVO ₄具有优异的耐光腐蚀性能。此外，BiVO ₄的三维结构为Au提供了丰富的位点，显着提高了Au的负载量和催化稳定性。因此，Au/BiVO ₄催化GBFC可以同时将储存在葡萄糖中的太阳能和化学能转化为电能，提供极高的功率密度和开路电压（575 μW cm ^-2和0.86 V），并稳定工作20小时。总之，Au/BiVO ₄催化 GBFC 实现了高功率输出和高稳定性。因此，本研究将通过光电耦合纳米酶催化策略的创新应用，显着推动GBFC的发展。