Nitrogen-Doped Carbon with Non-Precious Metals as Efficient Catalyst for Oxygen Reduction and Na2CO3 Electrolysis

作者：Huang, Mengjie; Tang, Yang^*; Gong, Yi; Chen, Yongmei; Sun, Yanzhi; Yang, Xiaojin; Wan, Pingyu

来源：ChemElectroChem, 2015, 2(12): 2089-2095.

DOI：10.1002/celc.201500266

• Na2CO3 electrolysis
• nitrogen-doped carbon
• non-precious metals
• oxygen diffusion cathodes
• oxygen reduction reaction

Developing oxygen reduction reaction (ORR) catalysts with high activity and low cost is a challenge in the field of electrochemical energy conversion. Here, an efficient catalyst of N-doped carbon with non-precious metals (Mn, Fe, Co, and Ni) designated as MFCN/NC has been prepared by using a simple pyrolysis method. Pyridinic nitrogen, graphitic carbon, MnO, and Fe-Co-Ni nanoparticles, which are efficient for catalyzing the ORR individually or synergistically, are successfully introduced into the composite catalyst. The optimized MFCN/NC catalyst exhibits four-electron reduction of O-2 with a more positive ORR onset potential (54mV) and a more positive half-wave potential (46mV) than commercial Pt/C. Moreover, MFCN/NC shows remarkable electrocatalytic activity and long-term stability in Na2CO3 electrolysis. The cell voltages at 10 and 100mAcm(-2) are only 0.86 and 1.45V, respectively, suggesting an energy-saving electrolysis of Na2CO3 to regenerate NaHCO3 and NaOH.

• 出版日期2015-12
• 单位北京化工大学