双金属片
分解水
材料科学
电化学
化学工程
碳纤维
催化作用
纳米技术
无机化学
兴奋剂
化学
电极
光电子学
冶金
复合材料
有机化学
物理化学
金属
工程类
光催化
复合数
作者
Dandan Zhao,Qi Shao,Ying Zhang,Xiaoqing Huang
出处
期刊:Nanoscale
[The Royal Society of Chemistry]
日期:2018-01-01
卷期号:10 (48): 22787-22791
被引量:28
摘要
Metal phosphates are regarded as promising electrocatalysts, while their activity and stability for overall water splitting are not yet fully satisfactory. In order to overcome these limitations, herein we develop a new class of N-doped carbon shelled bimetallic phosphates ((FexCoy)P2O7@N-C) as efficient electrocatalysts for overall water splitting. The shelled bimetallic phosphates can lower the OER overpotential by up to 100 mV compared with their unshelled phosphate counterparts as well as show superior stability up to 80 h at a high current density of 40 mA cm-2 for alkaline water splitting. Detailed studies reveal that the newly formed metal oxyhydroxide/oxide/hydroxide during electrocatalysis plays key roles in the activity enhancement. In addition, the N-doped carbon shell can largely prevent serious corrosion/aggregation with the surface environment being largely maintained, showing a unique strategy for designing non-precious electrocatalysts with largely improved activity and stability for overall water splitting and beyond.
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