| Autor: |
Liu D; State Key Lab of Organic-Inorganic Composites, Beijing University of Chemical Technology, Beijing 100029, China., Lv Q; State Key Lab of Organic-Inorganic Composites, Beijing University of Chemical Technology, Beijing 100029, China., Lu S; State Key Lab of Organic-Inorganic Composites, Beijing University of Chemical Technology, Beijing 100029, China., Fang J; Beijing Advanced Innovation Center for Soft Matter Science and Engineering, Beijing University of Chemical Technology, Beijing 100029, China., Zhang Y; State Key Lab of Organic-Inorganic Composites, Beijing University of Chemical Technology, Beijing 100029, China., Wang X; State Key Lab of Organic-Inorganic Composites, Beijing University of Chemical Technology, Beijing 100029, China., Xue Y; State Key Lab of Organic-Inorganic Composites, Beijing University of Chemical Technology, Beijing 100029, China., Zhu W; State Key Lab of Organic-Inorganic Composites, Beijing University of Chemical Technology, Beijing 100029, China., Zhuang Z; State Key Lab of Organic-Inorganic Composites, Beijing University of Chemical Technology, Beijing 100029, China.; Beijing Advanced Innovation Center for Soft Matter Science and Engineering, Beijing University of Chemical Technology, Beijing 100029, China.; Beijing Key Laboratory of Energy Environmental Catalysis, Beijing University of Chemical Technology, Beijing 100029, China. |
| Abstrakt: |
Proton exchange membrane water electrolyzer can sustainably and environmentally friendly produce hydrogen. However, it is hindered by the lack of high-performance anode catalysts for oxygen evolution reaction (OER) in acid electrolyte. Herein, IrCuNi deeply concave nanocubes (IrCuNi DCNCs) are successfully synthesized from the selective etching of the facet of cubic nanoparticles, and they significantly boost the OER. The obtained IrCuNi DCNCs show high activity toward OER in the acidic electrolyte, which only requires an overpotential of 273 mV to achieve the OER current density of 10 mA cm -2 at a low Ir loading of 6.0 μg Ir cm -2 . The precious metal based mass activity is 6.6 A mg Ir -1 at 1.53 V, which is 19 times as high as that of pristine Ir. It demonstrates that the outstanding catalytic performance is beneficial from the well-defined multimetal concave nanostructures, which may shed light on the fabrication of efficient water electrolyzers. |
