Please use this identifier to cite or link to this item: https://hdl.handle.net/10356/151246
Title: Facile synthesis of amorphous ternary metal borides-reduced graphene oxide hybrid with superior oxygen evolution activity
Authors: Nsanzimana, Jean Marie Vianney
Dangol, Raksha
Reddu, Vikas
Duo, Shou
Peng, Yeucheng
Dinh, Khang Ngoc
Huang, Zhenfeng
Yan, Qingyu
Wang, Xin
Keywords: Engineering::Chemical engineering
Issue Date: 2019
Source: Nsanzimana, J. M. V., Dangol, R., Reddu, V., Duo, S., Peng, Y., Dinh, K. N., Huang, Z., Yan, Q. & Wang, X. (2019). Facile synthesis of amorphous ternary metal borides-reduced graphene oxide hybrid with superior oxygen evolution activity. ACS Applied Materials and Interfaces, 11(1), 846-855. https://dx.doi.org/10.1021/acsami.8b17836
Project: M4011784
RG6/17
M4020246
ARC10/15
Journal: ACS Applied Materials and Interfaces 
Abstract: Metal borides represent an emerging family of advanced electrocatalyst for oxygen evolution reaction (OER). Herein, we present a fast and simple method of synthesizing iron-doped amorphous nickel boride on reduced graphene oxide (rGO) sheets. The hybrid exhibits outstanding OER performance and stability in prolonged OER operation. In 1.0 M KOH, only 230 mV is required to afford a current density of 15 mA cm⁻² with a small Tafel slope of 50 mV dec⁻¹. DFT calculations lead to a suggestion that the in situ formation of MOₓHᵧ during electrochemical activation acts as active sites for water oxidation. The superior OER activity of the as-prepared catalyst is attributed to (i) its unique amorphous structure to allow abundant active sites, (ii) synergistic effect of constituents, and (iii) strong coupling of active material and highly conductive rGO. This work not only provides new perspectives to design a highly effective material for OER but also opens a promising avenue to tailor the electrochemical properties of metal borides, which could be extended to other materials for energy storage and conversion technologies.
URI: https://hdl.handle.net/10356/151246
ISSN: 1944-8244
DOI: 10.1021/acsami.8b17836
Rights: © 2018 American Chemical Society. All rights reserved.
Fulltext Permission: none
Fulltext Availability: No Fulltext
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