Journal article
An Ion-Imprinting Derived Strategy to Synthesize Single-Atom Iron Electrocatalysts for Oxygen Reduction
Small (Weinheim an der Bergstrasse, Germany), Vol.17(16)
12/11/2020
Abstract
Carbon-based single-atom catalysts (CSACs) have recently received extensive attention in catalysis research. However, the preparation process of CSACs involves a high-temperature treatment, during which metal atoms are mobile and aggregated into nanoparticles, detrimental to the catalytic performance. Herein, an ion-imprinting derived strategy is proposed to synthesize CSACs, in which isolated metal-nitrogen-carbon (Me-N4-Cx) moiety covalently binds oxygen atoms in Si-based molecular sieve frameworks. Such a feature makes Me-N4-Cx moiety well protected/confined during the heat treatment, resulting in the final material enriched with single-atom metal active sites. As a proof of concept, a single-atom Fe-N-C catalyst is synthesized by using this ion-imprinting derived strategy. Finally, experimental results and theoretical calculations demonstrate high concentration of single FeN4 active sites distributed in this catalyst, resulting in an outstanding oxygen reduction reaction (ORR) performance with a half-wave potential of 0.908 V in alkaline media.
Metrics
1 Record Views
Details
- Title
- An Ion-Imprinting Derived Strategy to Synthesize Single-Atom Iron Electrocatalysts for Oxygen Reduction
- Creators
- Shichao Ding - Washington State Univ., Pullman, WA (United States)] (ORCID:000000033795306XZhaoyuan Lyu - Washington State UniversityHong Zhong - Washington State UniversityDong Liu - Washington State UniversityErik Sarnello - Northern Illinois UniversityLingzhe Fang - Northern Illinois UniversityMingjie Xu - University of California, IrvineMark H. Engelhard - Pacific Northwest National Lab. (PNNL), Richland, WA (United States)Hangyu Tian - Washington State UniversityTao LiXiaoqing Pan - University of California, IrvineScott P. Beckman - Washington State UniversityShuo Feng - Washington State UniversityDan Du - Washington State UniversityJin‐Cheng LiMinhua Shao - Hong Kong University of Science and TechnologyYuehe Lin - Washington State University
- Publication Details
- Small (Weinheim an der Bergstrasse, Germany), Vol.17(16)
- Academic Unit
- School of Mechanical and Materials Engineering
- Publisher
- Wiley
- Identifiers
- 99901227636601842
- Language
- English
- Resource Type
- Journal article