Co-N-doped MoO2 nanowires as efficient electrocatalysts for the oxygen reduction reaction and hydrogen evolution reaction

• Published in: Nano energy 2017-11, Vol.41, p.772-779
• Main Authors: Yang, Linjing, Yu, Jiayuan, Wei, Zhaoqian, Li, Guixiang, Cao, Lindie, Zhou, Weijia, Chen, Shaowei
• Format: Article
• Language: English
• Subjects: Doping; Hydrogen evolution reaction; MoO2 nanowires; Oxygen reduction reaction; Templates
• ISSN: 2211-2855
• DOI: 10.1016/j.nanoen.2017.03.032

Oxygen reduction reaction (ORR) and hydrogen evolution reaction (HER) are traditionally carried out with noble metals (such as Pt) as catalysts, respectively. Herein, Co-N-doped MoO2 nanowires catalysts were synthesized by employing MoO2 nanowires as templates and conductive substrates. The effect of nanowire structure and non-metal/metal doping on ORR and HER performance were scientific discussed. The most active Co-N-MoO2 (Co-N-doped MoO2) exhibited high ORR catalytic activity (an onset potential of +0.87V vs. RHE, n values of 3.56 and 3.68, excellent electrochemical stability) and outstanding HER performance with a low overpotential (69mV vs. RHE), high electrochemical area and robust stability in 0.1M KOH, which are associated with the defined nanowires structure, and homogeneous doping of Co/N into MoO2 with numerous active sites. [Display omitted] •Using MoO2 nanowires as templates and conductive substrates synthesized Co−N−MoO2.•The deliberate doping with N and Co atoms exhibited high activities for ORR and HER.•The 1D conductive substrate with co-doping is attractive for heterogeneous catalysis.