TY - JOUR
T1 - Preparation of Nonprecious Metal Electrocatalysts for the Reduction of Oxygen Using a Low-Temperature Sacrificial Metal
AU - Al-Zoubi, Talha
AU - Zhou, Yu
AU - Yin, Xi
AU - Janicek, Blanka
AU - Sun, Chengjun
AU - Schulz, Charles E.
AU - Zhang, Xiaohui
AU - Gewirth, Andrew A.
AU - Huang, Pinshane
AU - Zelenay, Piotr
AU - Yang, Hong
N1 - Funding Information:
This work is supported in part by the Chinese-American Railway Transportation Joint Research Center at UIUC and a Packard Foundation Fellowship. Electron microscopy characterization was carried out at the Materials Research Laboratory at the University of Illinois. This research used resources of the Advanced Photon Source, an Office of Science User Facility operated for the U.S. Department of Energy (DOE) Office of Science by Argonne National Laboratory (DE-AC02-06CH11357). Research performed at Los Alamos National Laboratory was supported by DOE’s Office of Energy Efficiency and Renewable Energy (EERE) through Fuel Cell Technologies Office. We are very grateful to Dr. Richard T. Haasch, Dr. Kiran Subedi, Dr. Pei-Chieh Shih, Mr. Guanhua Wang, Mr. Huayang Liu, Ms. Yanling Ma, and Ms. Annie Esposito for their help.
Publisher Copyright:
Copyright © 2020 American Chemical Society.
PY - 2020/3/25
Y1 - 2020/3/25
N2 - Non-platinum group metal (non-PGM) electrocatalysts for the oxygen reduction reaction (ORR) are generally composed of iron, nitrogen, and carbon synthesized through high-temperature pyrolysis. Among the various types of precursors, metal-organic frameworks (MOFs), zeolitic imidazolate framework (ZIF)-8 in particular, have often been used in the synthesis. The pyrolysis of ZIF-8 precursor relies on the use of Zn as a sacrificial metal (SM), and the optimal processing temperatures often exceed 1000 °C to generate active non-PGM catalysts. The high pyrolysis temperature tends to result in heterogeneous active moieties ranging from Fe single atoms to nanoparticles. In this study, we present the synthesis of non-PGM catalysts using Cd as the sacrificial metal instead of Zn. By using Cd, we were able to generate active non-PGM electrocatalysts from the MOF precursors at a low pyrolysis temperature of 750 °C, which helps preserve the single atomic iron active sites.
AB - Non-platinum group metal (non-PGM) electrocatalysts for the oxygen reduction reaction (ORR) are generally composed of iron, nitrogen, and carbon synthesized through high-temperature pyrolysis. Among the various types of precursors, metal-organic frameworks (MOFs), zeolitic imidazolate framework (ZIF)-8 in particular, have often been used in the synthesis. The pyrolysis of ZIF-8 precursor relies on the use of Zn as a sacrificial metal (SM), and the optimal processing temperatures often exceed 1000 °C to generate active non-PGM catalysts. The high pyrolysis temperature tends to result in heterogeneous active moieties ranging from Fe single atoms to nanoparticles. In this study, we present the synthesis of non-PGM catalysts using Cd as the sacrificial metal instead of Zn. By using Cd, we were able to generate active non-PGM electrocatalysts from the MOF precursors at a low pyrolysis temperature of 750 °C, which helps preserve the single atomic iron active sites.
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U2 - 10.1021/jacs.9b11061
DO - 10.1021/jacs.9b11061
M3 - Article
C2 - 32119535
AN - SCOPUS:85082388666
SN - 0002-7863
VL - 142
SP - 5477
EP - 5481
JO - Journal of the American Chemical Society
JF - Journal of the American Chemical Society
IS - 12
ER -