An inherent heat driven fuel exhaling hydrazine fuel cell

Highlights: • Conversion of heat of neutralization into electricity. • Degrading a pollutant into power and fuel simultaneously. • IHEC offers an on board reservoir for PEM fuel cell. Molecular fuel production during electricity generation is an elusive challenge in the chemistry of energy devices offering tremendous possibilities in the sustainable energy landscape. We illustrate an inherent-heat-driven electrochemical cell (IHEC) where the heat of neutralization can be tapped as electromotive force for simultaneous power (∼70 mW/cm²) and molecular fuel (∼70 mL/h) production. By coupling fuel and electricity generation in the same device, IHEC offers a paradigm shift in the chemistry of energy devices by its capability to directly fuel a proton exchange membrane fuel cell without any hydrogen storage unit.