塔菲尔方程
过电位
电催化剂
析氧
材料科学
双功能
纳米点
催化作用
化学工程
分解水
镍
无机化学
纳米技术
电化学
化学
电极
物理化学
冶金
有机化学
工程类
光催化
作者
Xinlong Liu,Hong Yu,Yufei Zhang,Yun Zheng,Yubo Luo,Zhengfei Dai,Bing Li,Yun Zong,Qingyu Yan
标识
DOI:10.1002/anie.201706610
摘要
Abstract Uniform Ni 3 C nanodots dispersed in ultrathin N‐doped carbon nanosheets were successfully prepared by carburization of the two dimensional (2D) nickel cyanide coordination polymer precursors. The Ni 3 C based nanosheets have lateral length of about 200 nm and thickness of 10 nm. When doped with Fe, the Ni 3 C based nanosheets exhibited outstanding electrocatalytic properties for both the hydrogen evolution reaction (HER) and oxygen evolution reaction (OER). For example, 2 at % Fe (atomic percent) doped Ni 3 C nanosheets depict a low overpotential (292 mV) and a small Tafel slope (41.3 mV dec −1 ) for HER in KOH solution. An outstanding OER catalytic property is also achieved with a low overpotential of 275 mV and a small Tafel slope of 62 mV dec −1 in KOH solution. Such nanodot‐incorporated 2D hybrid structures can serve as an efficient bifunctional electrocatalyst for overall water splitting.
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