@article{Chen2018, 
author = {Li Chen and Xing Zhang and Wenjie Jiang and Yun Zhang and Linbo Huang and Yuyun Chen and Yuguo Yang and Li Li and Jinsong Hu},
title = {In situ transformation of Cu2O@MnO2 to Cu@Mn(OH)2 nanosheet-on-nanowire arrays for efficient hydrogen evolution},
year = {2018},
journal = {Nano Research},
volume = {11},
number = {4},
pages = {1798-1809},
keywords = {electrocatalysis, hydrogen evolution reaction (HER), water electrolysis, manganese oxides, manganese hydroxides},
url = {https://www.sciopen.com/article/10.1007/s12274-017-1798-6},
doi = {10.1007/s12274-017-1798-6},
abstract = {The development of new non-precious metal catalysts and understanding the origin of their activity for the hydrogen evolution reaction (HER) are essential for rationally designing highly active low-cost catalysts as alternatives to state-of-the-art precious metal catalysts. Herein, manganese oxide/hydroxide was demonstrated as a highly active electrocatalysts for the HER by fabricating MnO2 nanosheets coated with Cu2O nanowire arrays (Cu2O@MnO2 NW@NS) on Cu foam followed by an in situ chronopotentiometry (CP) treatment. It was discovered that the in situ transformation of Cu2O@MnO2 into Cu@Mn(OH)2 NW@NS by the CP treatment drastically boosted the catalytic activity for the HER due to an enhancement of its intrinsic activity. Together with the benefits from such three-dimensional (3D) core–shell arrays for exposing more accessible active sites and efficient mass and electron transfers, the resulting Cu@Mn(OH)2 NW@NS exhibited excellent HER activity and outstanding durability in terms of a low overpotential of 132 mV vs. RHE at 10 mA/cm2. Overall, we expect these findings to generate new opportunities for the exploration of other Mn-based nanomaterials as efficient electrocatalysts and enable further understanding of their catalytic processes.}
}