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Abstract Self‐powered biosensors (SPBs) based on biofuel cells (BFCs) use electrical output as a sensing signal without the need of external power supplies, providing a feasible approach to constructing miniaturized implantable or portable devices. In this work, a novel nanozyme of gold nanoclusters/palladium nanocubes (AuNCs/PdNCs) heterostructure is successfully fabricated to develop an innovatively self‐powered and non‐enzymatic glucose sensing system. The AuNCs/PdNCs with glucose oxidase (GOD)‐like activity exhibits superior electrocatalytic and non‐enzymatic sensing performance toward glucose. The non‐enzymatic BFCs‐based SPBs system, established on the AuNCs/PdNCs (anodic catalyst) and single atomic Fe sites coupled with carbon‐encapsulated Fe 3 C crystals (Fe 3 C@C‐Fe SACs as a cathodic catalyst) platform, exhibits an exceptional sensitivity to glucose with 0.151 µW cm −2 m m −1 (3.4 times higher than the PdNCs), outstanding selectivity and robust stability. The outstanding performance of the BFCs‐based SPBs system can be attributed to the synergistic cooperation between the PdNCs and AuNCs.
Lei et al. (Fri,) studied this question.