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Title: Reducing Iridium Loading in Oxygen Evolution Reaction Electrocatalysts Using Core–Shell Particles with Nitride Cores

Abstract

Here, the oxygen evolution reaction (OER) has broad applications in electrochemical devices, but it often requires expensive and scarce Ir-based catalysts in acid electrolyte. Presented here is a framework to reduce Ir loading by combining core–shell iridium/metal nitride morphologies using in situ experiments and density functional theory (DFT) calculations. Several group VIII transition metal (Fe, Co, and Ni) nitrides are studied as core materials, with Ir/Fe4N core–shell particles showing enhancement in both OER activity and stability. In situ X-ray absorption fine structure measurements are used to determine the structure and stability of the core–shell catalysts under OER conditions. DFT calculations are used to demonstrate adsorbate binding energies as descriptors of the observed activity trends.

Authors:
 [1];  [1];  [2];  [2];  [2];  [2]; ORCiD logo [3]; ORCiD logo [4]
  1. Columbia Univ., New York, NY (United States)
  2. Brookhaven National Lab. (BNL), Upton, NY (United States)
  3. Stony Brook Univ., Stony Brook, NY (United States)
  4. Columbia Univ., New York, NY (United States); Brookhaven National Lab. (BNL), Upton, NY (United States)
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:
1438306
Report Number(s):
BNL-205662-2018-JAAM
Journal ID: ISSN 2155-5435
Grant/Contract Number:  
SC0012704
Resource Type:
Accepted Manuscript
Journal Name:
ACS Catalysis
Additional Journal Information:
Journal Volume: 8; Journal Issue: 3; Journal ID: ISSN 2155-5435
Publisher:
American Chemical Society (ACS)
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; acidic OER; core−shell particle; density functional theory; electrocatalysis; X-ray absorption spectroscopy

Citation Formats

Tackett, Brian M., Sheng, Wenchao, Kattel, Shyam, Yao, Siyu, Yan, Binhang, Kuttiyiel, Kurian A., Wu, Qiyuan, and Chen, Jingguang G. Reducing Iridium Loading in Oxygen Evolution Reaction Electrocatalysts Using Core–Shell Particles with Nitride Cores. United States: N. p., 2018. Web. https://doi.org/10.1021/acscatal.7b04410.
Tackett, Brian M., Sheng, Wenchao, Kattel, Shyam, Yao, Siyu, Yan, Binhang, Kuttiyiel, Kurian A., Wu, Qiyuan, & Chen, Jingguang G. Reducing Iridium Loading in Oxygen Evolution Reaction Electrocatalysts Using Core–Shell Particles with Nitride Cores. United States. https://doi.org/10.1021/acscatal.7b04410
Tackett, Brian M., Sheng, Wenchao, Kattel, Shyam, Yao, Siyu, Yan, Binhang, Kuttiyiel, Kurian A., Wu, Qiyuan, and Chen, Jingguang G. Fri . "Reducing Iridium Loading in Oxygen Evolution Reaction Electrocatalysts Using Core–Shell Particles with Nitride Cores". United States. https://doi.org/10.1021/acscatal.7b04410. https://www.osti.gov/servlets/purl/1438306.
@article{osti_1438306,
title = {Reducing Iridium Loading in Oxygen Evolution Reaction Electrocatalysts Using Core–Shell Particles with Nitride Cores},
author = {Tackett, Brian M. and Sheng, Wenchao and Kattel, Shyam and Yao, Siyu and Yan, Binhang and Kuttiyiel, Kurian A. and Wu, Qiyuan and Chen, Jingguang G.},
abstractNote = {Here, the oxygen evolution reaction (OER) has broad applications in electrochemical devices, but it often requires expensive and scarce Ir-based catalysts in acid electrolyte. Presented here is a framework to reduce Ir loading by combining core–shell iridium/metal nitride morphologies using in situ experiments and density functional theory (DFT) calculations. Several group VIII transition metal (Fe, Co, and Ni) nitrides are studied as core materials, with Ir/Fe4N core–shell particles showing enhancement in both OER activity and stability. In situ X-ray absorption fine structure measurements are used to determine the structure and stability of the core–shell catalysts under OER conditions. DFT calculations are used to demonstrate adsorbate binding energies as descriptors of the observed activity trends.},
doi = {10.1021/acscatal.7b04410},
journal = {ACS Catalysis},
number = 3,
volume = 8,
place = {United States},
year = {2018},
month = {2}
}

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Figures / Tables:

Figure 1 Figure 1: Results of electrochemical tests of Ir/Fe4N (yellow), Ir/Co4N (green), Ir/Ni4N (blue), and IrO2 (black) conducted in 0.5 M H2SO4. Total electrode mass loading for each sample was 30 μg, resulting in 50% less Ir on the Ir/M4N electrodes compared to the IrO2 electrode. (a) Cyclic voltammograms at 50more » mV s-1, 25th cycle (b) anodic OER potential sweeps at 10 mV s-1, (c) overpotential required to reach 10 mA cm-2 geo and specific activity (iECSA) at 1.54 VRHE, error bars are standard error around mean of at least 3 trials, and (d) chronopotentiometry at 10 mA cm-2geo.« less

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