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Title: Facile synthesis of Co-Fe-B-P nanochains as an efficient bifunctional electrocatalyst for overall water-splitting
Authors: Wu, Zexing
Nie, Dazong
Song, Min
Jiao, Tiantian
Fu, Gengtao
Liu, Xien
Keywords: Engineering::Chemical engineering
Issue Date: 2019
Source: Wu, Z., Nie, D., Song, M., Jiao, T., Fu, G. & Liu, X. (2019). Facile synthesis of Co-Fe-B-P nanochains as an efficient bifunctional electrocatalyst for overall water-splitting. Nanoscale, 11(15), 7506-7512.
Journal: Nanoscale
Abstract: Design of cost-effective bifunctional electrocatalysts for both the oxygen evolution reaction (OER) and hydrogen evolution reaction (HER) is vital for developing hydrogen energy for the future. Herein, a cost-effective phosphorus-doped Co-Fe-B material with chain-like structure (denoted as Co₁-Fe₁-B-P) is reported as an efficient and novel bifunctional electrocatalyst for the OER and HER, and was produced via a facile water-bath synthesis and subsequent phosphorization. For the OER, the as-prepared Co₁-Fe₁-B-P nanochains require an extremely low overpotential of about 225 mV at 10 mA cm⁻² and possess a small Tafel slope of 40 mV dec⁻¹ in alkaline media. Impressively, the HER properties of Co₁-Fe₁-B-P nanochains are superior to those of P-free Co-Fe-B in terms of overpotential at 10 mA cm⁻² (173 mV vs. 239 mV) and kinetic Tafel slope (96 mV dec⁻¹ vs. 105 mV dec⁻¹). The synergetic effect between Co-Fe-B and doped-P is mainly responsible for the satisfactory bifunctional performance, while the one-dimensional (1D) chain-like structure endows Co₁-Fe₁-B-P with abundant catalytically active sites that enhance the atom utilization efficiency. Moreover, the developed Co₁-Fe₁-B-P nanochains can be simultaneously utilized as both the cathode and anode for overall water-splitting, which requires a cell voltage of only 1.68 V to deliver 10 mA cm⁻². This work provides a feasible and promising protocol to realize metal borides as efficient electrocatalysts in energy-related applications.
ISSN: 2040-3364
DOI: 10.1039/c9nr01794a
Rights: © 2019 The Royal Society of Chemistry. All rights reserved.
Fulltext Permission: none
Fulltext Availability: No Fulltext
Appears in Collections:SCBE Journal Articles

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