摘要：Generating electric power using CO
2 as a reactant is challenging because the electroreduction of CO
2 usually requires a large overpotential. Herein, we report the design and development of a polymer electrolyte fuel cell driven by feeding H
2 and CO
2 to the anode (Pt/C) and cathode (Pt
0.8Ru
0.2/C), respectively, based on their theoretical electrode potentials. Pt–Ru/C is a promising electrocatalysts for CO
2 reduction at a low overpotential; consequently, CH
4 is continuously produced through CO
2 reduction with an enhanced faradaic efficiency (18.2%) and without an overpotential (at 0.20 V vs. RHE) was achieved when dilute CO
2 is fed at a cell temperature of 40 °C. Significantly, the cell generated electric power (0.14 mW cm
−2) while simultaneously yielding CH
4 at 86.3 μmol g
−1 h
−1. These results show that a H
2-CO
2 fuel cell is a promising technology for promoting the carbon capture and utilization (CCU) strategy.
