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Title: Chemical Structure of Fe–Ni Nanoparticles for Efficient Oxygen Evolution Reaction Electrocatalysis

Abstract

Bimetallic iron-nickel-based nanocatalysts are perhaps the most active for the oxygen evolution reaction (OER) in alkaline electrolytes. Recent developments in literature have suggested that the ratio of iron and nickel in Fe-Ni thin films plays an essential role in the performance and stability of the catalysts. In this work, the metallic ratio of iron to nickel was tested in alloy bimetallic nanoparticles. Similar to thin films, nanoparticles with iron-nickel atomic compositions where the atomic iron percentage is ≤50% outperformed nanoparticles with iron-nickel ratios of >50%. Nanoparticles of Fe 20Ni 80, Fe 50Ni 50, and Fe 80Ni 20 compositions were evaluated and demonstrated to have overpotentials of 313, 327,, and 364 mV, respectively, at a current density of 10 mA/ cm 2. While the Fe 20Ni 80 composition might be considered to have the best OER performance at low current densities, Fe 50Ni 50 was found to have the best current density performance at higher current densities, making this composition particularly relevant for electrolysis conditions. However, when stability was evaluated through chronoamperometry and chronopotentiometry, the Fe 80Ni 20 composition resulted in the lowest degradation rates of 2.9 μA/h and 17.2 μV/h, respectively. These results suggest that nanoparticles with higher iron andmore » lower nickel content, such as the Fe 80Ni 20 composition, should be still taken into consideration while optimizing these bimetallic OER catalysts for overall electrocatalytic performance. Characterization by electron microscopy, diffraction, and X-ray spectroscopy provides detailed chemical and structural information on as-synthesized nanoparticle materials.« less

Authors:
 [1];  [1];  [2];  [3];  [1];  [1]; ORCiD logo [4];  [4]; ORCiD logo [3]; ORCiD logo [1]
  1. Univ. of Arkansas, Fayetteville, AR (United States). Ralph E. Martin Dept. of Chemical Engineering
  2. Univ. of Arkansas, Fayetteville, AR (United States). Inst. for Nanoscience and Engineering
  3. Univ. of Arkansas, Fayetteville, AR (United States). Dept. of Chemistry and Biochemistry
  4. Argonne National Lab. (ANL), Argonne, IL (United States). Advanced Photon Source (APS)
Publication Date:
Research Org.:
Univ. of Arkansas, Fayetteville, AR (United States); Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
OSTI Identifier:
1570063
Alternate Identifier(s):
OSTI ID: 1571445
Grant/Contract Number:  
SC0016529
Resource Type:
Published Article
Journal Name:
ACS Omega
Additional Journal Information:
Journal Volume: 4; Journal Issue: 17; Journal ID: ISSN 2470-1343
Publisher:
American Chemical Society (ACS)
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY

Citation Formats

Acharya, Prashant, Nelson, Zachary J., Benamara, Mourad, Manso, Ryan H., Bakovic, Sergio I. Perez, Abolhassani, Mojtaba, Lee, Sungsik, Reinhart, Benjamin, Chen, Jingyi, and Greenlee, Lauren F. Chemical Structure of Fe–Ni Nanoparticles for Efficient Oxygen Evolution Reaction Electrocatalysis. United States: N. p., 2019. Web. doi:10.1021/acsomega.9b01692.
Acharya, Prashant, Nelson, Zachary J., Benamara, Mourad, Manso, Ryan H., Bakovic, Sergio I. Perez, Abolhassani, Mojtaba, Lee, Sungsik, Reinhart, Benjamin, Chen, Jingyi, & Greenlee, Lauren F. Chemical Structure of Fe–Ni Nanoparticles for Efficient Oxygen Evolution Reaction Electrocatalysis. United States. doi:10.1021/acsomega.9b01692.
Acharya, Prashant, Nelson, Zachary J., Benamara, Mourad, Manso, Ryan H., Bakovic, Sergio I. Perez, Abolhassani, Mojtaba, Lee, Sungsik, Reinhart, Benjamin, Chen, Jingyi, and Greenlee, Lauren F. Fri . "Chemical Structure of Fe–Ni Nanoparticles for Efficient Oxygen Evolution Reaction Electrocatalysis". United States. doi:10.1021/acsomega.9b01692.
@article{osti_1570063,
title = {Chemical Structure of Fe–Ni Nanoparticles for Efficient Oxygen Evolution Reaction Electrocatalysis},
author = {Acharya, Prashant and Nelson, Zachary J. and Benamara, Mourad and Manso, Ryan H. and Bakovic, Sergio I. Perez and Abolhassani, Mojtaba and Lee, Sungsik and Reinhart, Benjamin and Chen, Jingyi and Greenlee, Lauren F.},
abstractNote = {Bimetallic iron-nickel-based nanocatalysts are perhaps the most active for the oxygen evolution reaction (OER) in alkaline electrolytes. Recent developments in literature have suggested that the ratio of iron and nickel in Fe-Ni thin films plays an essential role in the performance and stability of the catalysts. In this work, the metallic ratio of iron to nickel was tested in alloy bimetallic nanoparticles. Similar to thin films, nanoparticles with iron-nickel atomic compositions where the atomic iron percentage is ≤50% outperformed nanoparticles with iron-nickel ratios of >50%. Nanoparticles of Fe20Ni80, Fe50Ni50, and Fe80Ni20 compositions were evaluated and demonstrated to have overpotentials of 313, 327,, and 364 mV, respectively, at a current density of 10 mA/ cm2. While the Fe20Ni80 composition might be considered to have the best OER performance at low current densities, Fe50Ni50 was found to have the best current density performance at higher current densities, making this composition particularly relevant for electrolysis conditions. However, when stability was evaluated through chronoamperometry and chronopotentiometry, the Fe80Ni20 composition resulted in the lowest degradation rates of 2.9 μA/h and 17.2 μV/h, respectively. These results suggest that nanoparticles with higher iron and lower nickel content, such as the Fe80Ni20 composition, should be still taken into consideration while optimizing these bimetallic OER catalysts for overall electrocatalytic performance. Characterization by electron microscopy, diffraction, and X-ray spectroscopy provides detailed chemical and structural information on as-synthesized nanoparticle materials.},
doi = {10.1021/acsomega.9b01692},
journal = {ACS Omega},
number = 17,
volume = 4,
place = {United States},
year = {2019},
month = {10}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record
DOI: 10.1021/acsomega.9b01692

Figures / Tables:

Figure 1 Figure 1: TEM and HRTEM images of synthesized alloy nanoparticles: (a,d) Fe20Ni80, (b,e) Fe50Ni50, and (c,f) Fe80Ni20.

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Figures/Tables have been extracted from DOE-funded journal article accepted manuscripts.