|About this Abstract
||2018 TMS Annual Meeting & Exhibition
||Energy Technologies and CO2 Management Symposium
||Flexible and Hierarchical Nano-porous Catalyst with Efficient for Hydrogen Evolution Reaction
||Jianli Kang, Guoliang Zhang, Zhijia Zhang, Qin Huang
|On-Site Speaker (Planned)
A master alloy NiMnFeMo was fabricated by rapidly quenching in copper roller. The alloy contains two solid solution with same face centered cubic (FCC) phase structure and different composition by XRD、SEM and TEM. Herein, we used one-step dealloying method to prepare np-NiMnMoFe electrode with 3D self-support and hierarchical. In process of dealloying, the region of Mo-poor with lower chemical potential, where Mn/Fe was selectively dissolved out and formed nano-porous structure (2-4 nm). Whereas three-dimensional continuous rich-Mo area was not fully corrosion, in which played a self-supporting skeleton role and provide mechanical strength significantly . Meanwhile a large number of macroporous (150 nm) was formed in the poor-Mo and rich-Mo interface. Due to the unique structure of catalyst, it exhibits outstanding overpotentials of 133mV at large current density of 0.1A/cm2 for HER in alkaline solution. Furthermore, the novel nano-porous alloy electrode can work as bifunctional catalyst in 1.54V.