Two-Dimensional NiIr@N-Doped Carbon Nanocomposites Supported on Ni Foam for Electrocatalytic Overall Water Splitting

You Xu; Xingjie Chai; Mengying Liu; Tianlun Ren; Shanshan Yu; Ziqiang Wang; Xiaonian Li; Liang Wang; Hongjing Wang

doi:10.1002/chem.202003473

Two-Dimensional NiIr@N-Doped Carbon Nanocomposites Supported on Ni Foam for Electrocatalytic Overall Water Splitting

Chemistry. 2020 Nov 11;26(63):14496-14501. doi: 10.1002/chem.202003473. Epub 2020 Oct 6.

Authors

You Xu¹, Xingjie Chai¹, Mengying Liu¹, Tianlun Ren¹, Shanshan Yu¹, Ziqiang Wang¹, Xiaonian Li¹, Liang Wang¹, Hongjing Wang¹

Affiliation

¹ State Key Laboratory Breeding Base of Green-Chemical, Synthesis Technology, College of Chemical Engineering, Zhejiang University of Technology, Hangzhou, 310014, Zhejiang, P. R. China.

PMID: 32841440
DOI: 10.1002/chem.202003473

Abstract

Electrochemical water splitting can provide a promising avenue for sustainable hydrogen production. Highly efficient electrocatalysts toward the hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) are extremely important for the practical application of water splitting technology. Herein, a one-step annealing strategy is reported for the fabrication of a metal-organic framework-derived bifunctional self-supported electrocatalyst, which is composed of two-dimensional N-doped carbon-wrapped Ir-doped Ni nanoparticle composites supported on Ni foam (NiIr@N-C/NF). The resultant NiIr@N-C/NF displays excellent electrocatalytic performance in 1.0 m KOH, with low overpotentials of 32 mV at 10 mA cm^-2 for the HER and 329 mV at 50 mA cm^-2 for the OER. Particularly, the HER-OER bifunctional NiIr@N-C/NF needs only 1.50 V to yield 10 mA cm^-2 for overall water splitting.

Keywords: N-doped carbon; NiIr; bifunctional electrocatalysts; composite nanosheets; electrochemistry; water splitting.

Abstract

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