With hydrogen bond-directed three-dimensional phosphomolybdate-based supramolecular architecture as a precursor,a Mo_(2)C composite material(Mo_(2)C@NC)supported by nitrogen-doped carbon matrix was fabricated successf...With hydrogen bond-directed three-dimensional phosphomolybdate-based supramolecular architecture as a precursor,a Mo_(2)C composite material(Mo_(2)C@NC)supported by nitrogen-doped carbon matrix was fabricated successfully through calcination.In this composite material,Mo_(2)C particles with size about 5 to 8 nm disperse evenly in the framework of nitrogen-doped mesoporous carbon matrix.In acid media,to achieve a current density of 10 mA cm^(-2),the overpotential required was 142 mV with a Tafel slope of 63 mV dec−1.Under basic conditions,the overpotential reduced to as low as 56 mV with a Tafel slope of 59 mV dec−1.To realize overall water splitting,MoO_(2)-based composite material(MoO_(2)@NC)with nitrogen-doped carbon as matrix was obtained using the same precursor as Mo_(2)C@NC.MoO_(2)@NC exhibits excellent oxygen evolution reaction(OER)performance with an over potential of 302 mV.With Mo_(2)C@NC as cathode and MoO_(2)@NC as anode,an efficient electrolyzer was constructed,which required a cell voltage of 1.60 V to achieve a current of 10 mA cm^(-2) in 1.0 M KOH.Furthermore,besides overall water splitting,Mo_(2)C@NC also shows striking catalytic removal property towards 4-nitrophenol and Rhodamine B.展开更多
基金supported by National Natural Science Foundation of China(21303010)Opening Project of Key Laboratory of Polyoxometalate Science of Ministry of Education(130028720).
文摘With hydrogen bond-directed three-dimensional phosphomolybdate-based supramolecular architecture as a precursor,a Mo_(2)C composite material(Mo_(2)C@NC)supported by nitrogen-doped carbon matrix was fabricated successfully through calcination.In this composite material,Mo_(2)C particles with size about 5 to 8 nm disperse evenly in the framework of nitrogen-doped mesoporous carbon matrix.In acid media,to achieve a current density of 10 mA cm^(-2),the overpotential required was 142 mV with a Tafel slope of 63 mV dec−1.Under basic conditions,the overpotential reduced to as low as 56 mV with a Tafel slope of 59 mV dec−1.To realize overall water splitting,MoO_(2)-based composite material(MoO_(2)@NC)with nitrogen-doped carbon as matrix was obtained using the same precursor as Mo_(2)C@NC.MoO_(2)@NC exhibits excellent oxygen evolution reaction(OER)performance with an over potential of 302 mV.With Mo_(2)C@NC as cathode and MoO_(2)@NC as anode,an efficient electrolyzer was constructed,which required a cell voltage of 1.60 V to achieve a current of 10 mA cm^(-2) in 1.0 M KOH.Furthermore,besides overall water splitting,Mo_(2)C@NC also shows striking catalytic removal property towards 4-nitrophenol and Rhodamine B.
