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Title: In situ iron coating on nanocatalysts for efficient and durable oxygen evolution reaction

Abstract

The oxygen evolution reaction (OER) is essential to many important energy conversion and storage systems. To achieve high-performance and low-cost OER electrocatalysts, great effort has been devoted to the development of noble-metal-free OER nanocatalysts. While nanostructured materials have been shown effective at improving the catalytic activity, the stability of the nanocatalyst has yet to be significantly improved. Furthermore, nanocatalyst syntheses are typically complex, limiting their practical application. Herein, we design a noble-metal-free nanocatalyst which has a CoFeP x core and an in situ Fe coating layer to enhance the material’s catalytic activity and durability for OER. We utilize the vapor pressure difference of Fe and Co at high temperature to synthesize the CoFeP x-Fe core-shell nanoparticles via a one-step high-temperature shock technique. The high-temperature method strongly anchors the CoFeP x nanoparticles onto a carbon substrate. The thin Fe shell layer (~2 nm) coated on the CoFeP x greatly enhances the durability of the CoFeP x catalyst without hampering its activity due to the geometric effect. This nanocatalyst with an in situ Fe shell demonstrates a successful nanocoating approach for fabricating catalytically active protection layers on catalysts with improved activity and durability.

Authors:
 [1];  [1];  [2];  [2];  [2];  [1];  [1];  [1];  [1];  [2];  [1]
  1. Univ. of Maryland, College Park, MD (United States). Dept. of Materials Science and Engineering
  2. Brookhaven National Lab. (BNL), Upton, NY (United States). Center for Functional Nanomaterials (CFN)
Publication Date:
Research Org.:
Brookhaven National Lab. (BNL), Upton, NY (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
OSTI Identifier:
1543416
Report Number(s):
BNL-211911-2019-JAAM
Journal ID: ISSN 2211-2855
Grant/Contract Number:  
SC0012704
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Nano Energy
Additional Journal Information:
Journal Volume: 63; Journal Issue: C; Journal ID: ISSN 2211-2855
Publisher:
Elsevier
Country of Publication:
United States
Language:
English
Subject:
29 ENERGY PLANNING, POLICY AND ECONOMY; Electrochemical catalyst; Oxygen evolution reaction; Core-shell nanoparticle; Active nanocoating; High-temperature synthesis

Citation Formats

Yang, Chunpeng, Cui, Mingjin, Li, Na, Liu, Zhijuan, Hwang, Sooyeon, Xie, Hua, Wang, Xizheng, Kuang, Yudi, Jiao, Miaolun, Su, Dong, and Hu, Liangbing. In situ iron coating on nanocatalysts for efficient and durable oxygen evolution reaction. United States: N. p., 2019. Web. doi:10.1016/j.nanoen.2019.103855.
Yang, Chunpeng, Cui, Mingjin, Li, Na, Liu, Zhijuan, Hwang, Sooyeon, Xie, Hua, Wang, Xizheng, Kuang, Yudi, Jiao, Miaolun, Su, Dong, & Hu, Liangbing. In situ iron coating on nanocatalysts for efficient and durable oxygen evolution reaction. United States. doi:10.1016/j.nanoen.2019.103855.
Yang, Chunpeng, Cui, Mingjin, Li, Na, Liu, Zhijuan, Hwang, Sooyeon, Xie, Hua, Wang, Xizheng, Kuang, Yudi, Jiao, Miaolun, Su, Dong, and Hu, Liangbing. Wed . "In situ iron coating on nanocatalysts for efficient and durable oxygen evolution reaction". United States. doi:10.1016/j.nanoen.2019.103855. https://www.osti.gov/servlets/purl/1543416.
@article{osti_1543416,
title = {In situ iron coating on nanocatalysts for efficient and durable oxygen evolution reaction},
author = {Yang, Chunpeng and Cui, Mingjin and Li, Na and Liu, Zhijuan and Hwang, Sooyeon and Xie, Hua and Wang, Xizheng and Kuang, Yudi and Jiao, Miaolun and Su, Dong and Hu, Liangbing},
abstractNote = {The oxygen evolution reaction (OER) is essential to many important energy conversion and storage systems. To achieve high-performance and low-cost OER electrocatalysts, great effort has been devoted to the development of noble-metal-free OER nanocatalysts. While nanostructured materials have been shown effective at improving the catalytic activity, the stability of the nanocatalyst has yet to be significantly improved. Furthermore, nanocatalyst syntheses are typically complex, limiting their practical application. Herein, we design a noble-metal-free nanocatalyst which has a CoFePx core and an in situ Fe coating layer to enhance the material’s catalytic activity and durability for OER. We utilize the vapor pressure difference of Fe and Co at high temperature to synthesize the CoFePx-Fe core-shell nanoparticles via a one-step high-temperature shock technique. The high-temperature method strongly anchors the CoFePx nanoparticles onto a carbon substrate. The thin Fe shell layer (~2 nm) coated on the CoFePx greatly enhances the durability of the CoFePx catalyst without hampering its activity due to the geometric effect. This nanocatalyst with an in situ Fe shell demonstrates a successful nanocoating approach for fabricating catalytically active protection layers on catalysts with improved activity and durability.},
doi = {10.1016/j.nanoen.2019.103855},
journal = {Nano Energy},
issn = {2211-2855},
number = C,
volume = 63,
place = {United States},
year = {2019},
month = {6}
}

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