过电位
催化作用
吸附
塔菲尔方程
离解(化学)
电催化剂
热解
纳米颗粒
化学工程
材料科学
沸石咪唑盐骨架
分子
化学
碳纤维
氢
无机化学
纳米技术
金属有机骨架
物理化学
电化学
电极
有机化学
复合材料
工程类
复合数
作者
Minmin Wang,Min Li,Yilin Zhao,Naiyou Shi,Hui Zhang,Yong Zhao,Yaru Zhang,Haoran Zhang,Wenhong Wang,Kaian Sun,Yuan Pan,Shoujie Liu,Houyu Zhu,Wenyue Guo,Yanpeng Li,Yunqi Liu,Chenguang Liu
标识
DOI:10.1016/j.jechem.2021.09.037
摘要
The development of low-cost, efficient, and high atomic economy electrocatalysts for hydrogen evolution reaction (HER) in the entire pH range for sustainable hydrogen production is of great importance but still challenging. Herein, we synthesize a highly dispersed N-doped carbon frames (NCFs) anchored with Co single atoms (SAs) and Co nanoparticles (NPs) catalyst by a doping-adsorption-pyrolysis strategy for electrocatalytic hydrogen evolution. The Co SAs-Co NPs/NCFs catalyst exhibits an excellent HER activity with small overpotential, low Tafel slope, high turnover frequency as well as remarkable stability. It also exhibits a superior HER performance in the entire pH range. Combining with experimental and theoretical calculation, we find that Co SAs with Co-N3 coordination structure and Co NPs have a strong interaction for promoting synergistic HER electrocatalytic process. The H2O molecule is easily activated and dissociated on Co NPs, while the generated H* is easily adsorbed on Co SAs for HER, which makes the Co SAs-Co NPs/NCFs catalyst exhibit more suitable H adsorption strength and more conducive to the activation and dissociation of H2O molecules. This work not only proposes a novel idea for constructing coupling catalyst with atomic-level precision, but also provides strong reference for the development of high-efficiency HER electrocatalysts for practical application.
科研通智能强力驱动
Strongly Powered by AbleSci AI