催化作用
材料科学
掺杂剂
分解水
氢
氮气
法拉第效率
产量(工程)
碳纤维
碳化物
无机化学
化学工程
过电位
电化学
化学
碳纳米管
析氧
纳米技术
物理化学
兴奋剂
有机化学
复合数
冶金
复合材料
工程类
光催化
光电子学
电极
作者
Yipu Liu,Guangtao Yu,Guo-Dong Li,Yuanhui Sun,Tewodros Asefa,Wei Chen,Xiaoxin Zou
标识
DOI:10.1002/anie.201504376
摘要
In our efforts to obtain electrocatalysts with improved activity for water splitting, meticulous design and synthesis of the active sites of the electrocatalysts and deciphering how exactly they catalyze the reaction are vitally necessary. Herein, we report a one-step facile synthesis of a novel precious-metal-free hydrogen-evolution nanoelectrocatalyst, dubbed Mo2 C@NC that is composed of ultrasmall molybdenum carbide (Mo2 C) nanoparticles embedded within nitrogen-rich carbon (NC) nanolayers. The Mo2 C@NC hybrid nanoelectrocatalyst shows remarkable catalytic activity, has great durability, and gives about 100 % Faradaic yield toward the hydrogen-evolution reaction (HER) over a wide pH range (pH 0-14). Theoretical calculations show that the Mo2 C and N dopants in the material synergistically co-activate adjacent C atoms on the carbon nanolayers, creating superactive nonmetallic catalytic sites for HER that are more active than those in the constituents.
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