▎ 摘　　要

Electrocatalysts are vulnerable to be influenced during the oxygen reduction reaction (ORR) process on the cathodes of direct methanol fuel cells, mainly by the reaction products and air-containing traces of acidic gas carbon dioxide (CO2), leading to low activity and durability. Herein, an ORR catalyst was derived from furfural, nitrogen carbide (g-C3N4), and calcium chloride (CaCl2) via a dual-template method, resulting in two-dimensional graphene-like carbon nanosheets with a micro-mesoporous architecture, large Brunauer-Emmett-Teller surface areas (748 m(2)/g), an ultrahigh pyridinic nitrogen-doping level (13.6 wt %), and high degree of graphitization. The as-synthesized sample shows high ORR performance and robust durability in both alkaline and acidic electrolytes undergoing a gas mixture of O-2 and CO2 (95:5), demonstrating a strong tolerance of CO2 during the ORR process. Besides, the as-prepared material also exhibits competitive properties in the selective capture of CO2 gas versus N-2. Thus, this work provides a facile route of preparing high-performance bifunctional carbonaceous materials in both ORR and CO2 gas capture.