Nanowires assembled from MnCo2O4@C nanoparticles for water splitting and all-solid-state supercapacitor
transition metal oxide, nitrogen doped carbon, oxygen evolution, supercapacitor
The rational design of earth-abundant catalysts with excellent water splitting activities is important to obtain clean fuels for sustainable energy devices. In this study, mixed transition metal oxide nanoparticles encapsulated in nitrogendoped carbon (denoted as AB2O4@NC) were developed using a one-pot protocol, wherein a metal–organic complex was adopted as the precursor. As a proof of concept, MnCo2O4@NC was used as an electrocatalyst for water oxidation, and demonstrated an outstanding electrocatalytic activity with low overpotential to achieve a current density of 10 mA·cm-1 (η10 = 287 mV), small Tafel slope (55 mV·dec-1), and high stability (96% retention after 20 h). The excellent electrochemical performance benefited from the synergistic effects of the MnCo2O4 nanoparticles and nitrogen-doped carbon, as well as the assembled mesoporous nanowire structure. Finally, a highly stable all-solid-state supercapacitor based on MnCo2O4@NC was demonstrated (1.5% decay after 10,000 cycles).
Tsinghua University Press
Chencheng Sun,Jun Yang,Ziyang Dai,Xuewan Wang,Yufei Zhang,Laiquan Li,Peng Chen,Wei Huang,Xiaochen Dong, Nanowires assembled from MnCo2O4@C nanoparticles for water splitting and all-solid-state supercapacitor. NanoRes.2016, 9(5): 1300–1309