A general approach for the direct fabrication of metal oxide-based electrocatalysts for efficient bifunctional oxygen electrodes

Wang, Jie; Wu, Zexing; Han, Lili; Xuan, Cuijuan; Zhu, Jing; Xiao, Weiping; Wu, Jianzhong; Xin, Huolin L.; Wang, Deli

doi:10.1039/C7SE00085E

A general approach for the direct fabrication of metal oxide-based electrocatalysts for efficient bifunctional oxygen electrodes

Journal Article · Tue Mar 07 00:00:00 EST 2017 · Sustainable Energy & Fuels

DOI:https://doi.org/10.1039/C7SE00085E· OSTI ID:1431448

Wang, Jie ^[1]; Wu, Zexing ^[1]; Han, Lili ^[2]; Xuan, Cuijuan ^[1]; Zhu, Jing ^[1]; Xiao, Weiping ^[1]; Wu, Jianzhong ^[1]; ^[3]; ^[1]

Huazhong Univ. of Science and Technology, Wuhan (China). Ministry of Education, Key Lab. of Material Chemistry for Energy Conversion and Storage and Hubei Key Lab. of Material Chemistry and Service Failure, School of Chemistry and Chemical Engineering
Tianjin Univ., Tianjing (China). School of Materials Science and Engineering
Brookhaven National Lab. (BNL), Upton, NY (United States). Center for Functional Nanomaterials (CFN)

Here, we develop a simple one-pot synthetic strategy for the general preparation of nitrogen doped carbon supported metal/metal oxides (Co@CoO/NDC, Ni@NiO/NDC and MnO/NDC) derived from the complexing function of (ethylenediamine)tetraacetic acid (EDTA). EDTA serves not only as a resource to tune the morphology in terms of the complexation constant for M–EDTA, but also as a nitrogen and oxygen source for nitrogen doping and metal oxide formation, respectively. When the materials are used as electrocatalysts for the oxygen electrode reaction, Co@CoO/NDC-700 and MnO/NDC-700 show superior electrocatalytic activity towards the oxygen reduction reaction (ORR), while Co@CoO/NDC-700 and Ni@NiO/NDC-700 exhibit excellent oxygen evolution reaction (OER) activities. Taken together, the resultant Co@CoO/NDC-700 exhibits the best catalytic activity with favorable reaction kinetics and durability as a bi-functional catalyst for the ORR and OER, which is much better than the other two catalysts, Pt/C and Ir/C. Moreover, as an air electrode for a homemade zinc–air battery, Co@CoO/NDC-700 shows superior cell performance with a highest power density of 192.1 mW cm^-2, the lowest charge–discharge overpotential and high charge–discharge durability over 100 h.

View Accepted Manuscript (DOE)

Research Organization:: Brookhaven National Laboratory (BNL), Upton, NY (United States)

Sponsoring Organization:: Fundamental Research Funds for the Central Univ. (China); Huazhong Univ. of Science and Technology, Wuhan (China); National Natural Science Foundation of China (NNSFC); Program for New Century Excellent Talents in Universities of China (NCET); Thousand Talents Program (China); USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)

Grant/Contract Number:: SC0012704

OSTI ID:: 1431448

Report Number(s):: BNL--203447-2018-JAAM

Journal Information:: Sustainable Energy & Fuels, Journal Name: Sustainable Energy & Fuels Journal Issue: 4 Vol. 1; ISSN SEFUA7; ISSN 2398-4902

Publisher:: Royal Society of ChemistryCopyright Statement

Country of Publication:: United States

Language:: English

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