Electrocatalytic Strategies for Glucose Fuel Cells

Glucose fuel cells harness the oxidation of glucose at the anode to generate electrical energy, offering a sustainable route to power implantable devices and portable electronics. Central to this technology is the design of electrocatalysts that combine high activity, selectivity and durability under neutral or alkaline conditions. Strategies have evolved from enzyme-based systems to robust, non-enzymatic electrodes employing noble metals, transition-metal nitrides and bimetallic alloys. Key advances include nanoscale engineering of catalyst morphology to maximise surface area, modulation of support functionalities to control adsorption and electronic states, and the construction of three-dimensional porous architectures to facilitate mass transport. Optimisation of reaction pathways—whether direct electrooxidation or mediated by OH adsorption—has enhanced power densities, while low precious-metal loadings have improved cost-effectiveness. These developments underline the potential of glucose fuel cells as reliable, green energy sources with global significance in biomedical and environmental applications.

Research from Nature Portfolio

Recent studies have reported a binary Pt–Bi decorated nanoporous gold electrocatalyst prepared by sequential electroless and electrochemical plating on a nanoporous gold scaffold. The Pt–Bi modification yields a dense platinum layer interspersed with bismuth particles, producing an open circuit voltage close to 0.9 V and a peak power density of around 8 mW cm⁻² with low noble metal loading. This work demonstrates how porous architectures and synergistic metal–metal interactions can enhance glucose oxidation rates, improving gravimetric power densities by a factor of over four compared with conventional catalysts.

Electrocatalytic Strategies for Glucose Fuel Cells publication trend

The graph below shows the total number of articles in electrocatalytic strategies for glucose fuel cells across all publications each year (not limited to Nature Index journals).

Technical terms

Electrocatalysis: Acceleration of an electrochemical reaction at an electrode surface by a catalyst.

Nanoporous structure: A high-surface-area material containing nanoscale pores that enhance mass transport and reaction sites.

Open circuit voltage (OCV): The maximum voltage output of a fuel cell when no external load is applied.

Power density: The electrical power generated per unit electrode area or catalyst mass.

Direct glucose fuel cell: A device that oxidises glucose at the anode without enzymes to generate electrical energy.

References

1. Improved electrocatalytic activity of Pt on carbon nanofibers for glucose oxidation mediated by support oxygen groups in Pt perimeter. Applied Catalysis B Environment and Energy (2023).
2. A Glucose Fuel Cell for Implantable Brain–Machine Interfaces. PLOS ONE (2012).
3. Pt-Bi decorated nanoporous gold for high performance direct glucose fuel cell. Scientific Reports (2016).
4. 3D porous nanostructured Ni 3 N–Co 3 N as a robust electrode material for glucose fuel cell. RSC Advances (2020).