Hollow structured carbon-supported nickel cobaltite nanoparticles as an efficient bifunctional electrocatalyst for the oxygen reduction and evolution reaction

Wang, Jie; Han, Lili; Lin, Ruoqian; Xin, Huolin L.; Wang, Deli; Wu, Zexing

doi:10.1002/cctc.201501058

Title: Hollow structured carbon-supported nickel cobaltite nanoparticles as an efficient bifunctional electrocatalyst for the oxygen reduction and evolution reaction

Journal Article · Tue Jan 05 00:00:00 EST 2016 · ChemCatChem

DOI:https://doi.org/10.1002/cctc.201501058· OSTI ID:1246781

Wang, Jie ^[1]; Han, Lili ^[2]; Lin, Ruoqian ^[3]; Xin, Huolin L. ^[3]; Wang, Deli ^[1]; Wu, Zexing ^[1]

Huazhong Univ. of Science and Technology, Wuhan (People's Republic of China)
Brookhaven National Lab. (BNL), Upton, NY (United States); Tianjin Univ., Tianjin (People's Republic of China)
Brookhaven National Lab. (BNL), Upton, NY (United States); Stony Brook Univ., Stony Brook, NY (United States)

Here, the exploration of efficient electrocatalysts for both the oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) is essential for fuel cells and metal-air batteries. In this study, we developed 3D hollow-structured NiCo₂O₄/C nanoparticles with interconnected pores as bifunctional electrocatalysts, which are transformed from solid NiCo₂ alloy nanoparticles through the Kirkendall effect. The unique hollow structure of NiCo₂O₄ nanoparticles increases the number of active sites and improves contact with the electrolyte to result in excellent ORR and OER performances. In addition, the hollow-structured NiCo₂O₄/C nanoparticles exhibit superior long-term stability for both the ORR and OER compared to commercial Pt/C. The template- and surfactant-free synthetic strategy could be used for the low-cost and large-scale synthesis of hollow-structured materials, which would facilitate the screening of high-efficiency catalysts for energy conversion.

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

Sponsoring Organization:: USDOE Office of Science (SC), Basic Energy Sciences (BES)

Grant/Contract Number:: SC00112704

OSTI ID:: 1246781

Report Number(s):: BNL-111709-2016-JA; KC0403020

Journal Information:: ChemCatChem, Vol. 8, Issue 4; ISSN 1867-3880

Publisher:: ChemPubSoc EuropeCopyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 62 works

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