过电位
塔菲尔方程
催化作用
掺杂剂
材料科学
化学工程
无定形固体
磷酸盐
无机化学
吸附
电催化剂
纳米技术
兴奋剂
化学
物理化学
结晶学
有机化学
电化学
工程类
光电子学
电极
作者
Wen Xu,Jian Jing,Qifeng Yang,Liang Zhao,Quan Yuan,Yajuan Hao,Peng Jin,Lai Feng
出处
期刊:Chemcatchem
[Wiley]
日期:2019-04-30
卷期号:11 (10): 2484-2489
被引量:17
标识
DOI:10.1002/cctc.201900256
摘要
Abstract Ultrathin nanosheets of non‐layered materials have attracted intensive interests due to their abundantly accessible active sites. Herein, we demonstrate that the ultrathin FeP nanosheets (FeP‐I NS) with abundant mesoporosity and phosphate dopants can be facilely synthesized using ultrathin γ ‐Fe 2 O 3 NS as precursors. The as‐prepared catalyst displays good HER catalytic activity with an low overpotential ( η ) of 95/160 mV at the current densities of 10/100 mA cm −2 and small Tafel slope of 41 mV dec −1 as well as good stability during a period of 24 h in acid media. Additional experimental results reveal that the unique structural features of FeP‐I NS (i. e., ultrathin morphology, abundant mesoporosity, local structural distortion and amorphous domains) are key factors for achieving good HER activity. The computational studies demonstrate that the phosphate dopants (i. e., Fe 2 P 2 O 7 ) contribute to the superior catalytic performance of FeP by reducing the Gibbs free energy of intermediate H* adsorption (Δ G H* ) to the catalyst surface as well as by tailoring the electronic properties of the catalyst.
科研通智能强力驱动
Strongly Powered by AbleSci AI