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Title: High-Performance Transition Metal Phosphide Alloy Catalyst for Oxygen Evolution Reaction

Abstract

Oxygen evolution reaction (OER) is a pivotal process in many energy conversion and storage techniques, such as water splitting, regenerative fuel cells, and rechargeable metal-air batteries. The synthesis of stable, efficient, non-noble metal-based electrocatalysts for OER has been a long-standing challenge. In this work, a facile and scalable method to synthesize hollow and conductive iron–cobalt phosphide (Fe–Co–P) alloy nanostructures using an Fe–Co metal organic complex as a precursor is described. The Fe–Co–P alloy exhibits excellent OER activity with a specific current density of 10 mA/cm2 being achieved at an overpotential as low as 252 mV. The current density at 1.5 V (vs reversible hydrogen electrode) of the Fe–Co–P catalyst is 30.7 mA/cm2, which is more than 3 orders of magnitude greater than that obtained with state-of-the-art Fe–Co oxide catalysts. Our mechanistic experiments and theoretical analysis suggest that the electrochemical-induced high-valent iron stabilizes the cobalt in a low-valent state, leading to the simultaneous enhancement of activity and stability of the OER catalyst.

Authors:
 [1]; ORCiD logo [2];  [1];  [3];  [1];  [1];  [1];  [3];  [3];  [1];  [3]; ORCiD logo [1]; ORCiD logo [1]
  1. Univ. of Akron, OH (United States)
  2. Univ. of Akron, OH (United States); Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Joint Center for Artificial Photosynthesis
  3. Purdue Univ., West Lafayette, IN (United States). School of Chemical Engineering
Publication Date:
Research Org.:
Argonne National Laboratory (ANL), Argonne, IL (United States). Advanced Photon Source (APS)
Sponsoring Org.:
USDOE Office of Science (SC)
OSTI Identifier:
1438846
Grant/Contract Number:  
AC02-06CH11357
Resource Type:
Accepted Manuscript
Journal Name:
ACS Nano
Additional Journal Information:
Journal Volume: 12; Journal Issue: 1; Journal ID: ISSN 1936-0851
Publisher:
American Chemical Society (ACS)
Country of Publication:
United States
Language:
ENGLISH
Subject:
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY; Catalysts; Radiology; Metals; Alloys; Materials; Fe−Co−P alloy; self-assembly; hollow sphere; XANES; EXAFS; oxygen evolution reaction

Citation Formats

Liu, Kewei, Zhang, Changlin, Sun, Yuandong, Zhang, Guanghui, Shen, Xiaochen, Zou, Feng, Zhang, Haichang, Wu, Zhenwei, Wegener, Evan C., Taubert, Clinton J., Miller, Jeffrey T., Peng, Zhenmeng, and Zhu, Yu. High-Performance Transition Metal Phosphide Alloy Catalyst for Oxygen Evolution Reaction. United States: N. p., 2017. Web. doi:10.1021/acsnano.7b04646.
Liu, Kewei, Zhang, Changlin, Sun, Yuandong, Zhang, Guanghui, Shen, Xiaochen, Zou, Feng, Zhang, Haichang, Wu, Zhenwei, Wegener, Evan C., Taubert, Clinton J., Miller, Jeffrey T., Peng, Zhenmeng, & Zhu, Yu. High-Performance Transition Metal Phosphide Alloy Catalyst for Oxygen Evolution Reaction. United States. https://doi.org/10.1021/acsnano.7b04646
Liu, Kewei, Zhang, Changlin, Sun, Yuandong, Zhang, Guanghui, Shen, Xiaochen, Zou, Feng, Zhang, Haichang, Wu, Zhenwei, Wegener, Evan C., Taubert, Clinton J., Miller, Jeffrey T., Peng, Zhenmeng, and Zhu, Yu. Wed . "High-Performance Transition Metal Phosphide Alloy Catalyst for Oxygen Evolution Reaction". United States. https://doi.org/10.1021/acsnano.7b04646. https://www.osti.gov/servlets/purl/1438846.
@article{osti_1438846,
title = {High-Performance Transition Metal Phosphide Alloy Catalyst for Oxygen Evolution Reaction},
author = {Liu, Kewei and Zhang, Changlin and Sun, Yuandong and Zhang, Guanghui and Shen, Xiaochen and Zou, Feng and Zhang, Haichang and Wu, Zhenwei and Wegener, Evan C. and Taubert, Clinton J. and Miller, Jeffrey T. and Peng, Zhenmeng and Zhu, Yu},
abstractNote = {Oxygen evolution reaction (OER) is a pivotal process in many energy conversion and storage techniques, such as water splitting, regenerative fuel cells, and rechargeable metal-air batteries. The synthesis of stable, efficient, non-noble metal-based electrocatalysts for OER has been a long-standing challenge. In this work, a facile and scalable method to synthesize hollow and conductive iron–cobalt phosphide (Fe–Co–P) alloy nanostructures using an Fe–Co metal organic complex as a precursor is described. The Fe–Co–P alloy exhibits excellent OER activity with a specific current density of 10 mA/cm2 being achieved at an overpotential as low as 252 mV. The current density at 1.5 V (vs reversible hydrogen electrode) of the Fe–Co–P catalyst is 30.7 mA/cm2, which is more than 3 orders of magnitude greater than that obtained with state-of-the-art Fe–Co oxide catalysts. Our mechanistic experiments and theoretical analysis suggest that the electrochemical-induced high-valent iron stabilizes the cobalt in a low-valent state, leading to the simultaneous enhancement of activity and stability of the OER catalyst.},
doi = {10.1021/acsnano.7b04646},
journal = {ACS Nano},
number = 1,
volume = 12,
place = {United States},
year = {Wed Dec 06 00:00:00 EST 2017},
month = {Wed Dec 06 00:00:00 EST 2017}
}

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Cited by: 256 works
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Figures / Tables:

Figure 1 Figure 1: Schematic illustration of hollow Fe-Co-P alloy material synthesis. The Fe-Co MOC was prepared via a hydrothermal reaction with Co(NO3)2 6H2O and FeCl3 as the metal sources and trimesic acid as the ligand. The trimesic molecule was coordinated with Co or Fe ions to form a metal organic complexmore » structure (inset a). Fe-Co oxide/C hollow spheres were obtained after carbonization at 500 °C in Ar. A mixture of CoFe2O4 and Co was observed in the Fe-Co oxide/C hollow spheres (inset b). A Fe-Co-P alloy nanostructure was obtained after a controlled phosphidation by in situ-generated PH3. The crystal structure of the Fe-Co-P alloy is presented in inset c.« less

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