Tuning the electronic structure of NiCoVOx nanosheets through S doping for enhanced oxygen evolution. Issue 40 (7th October 2021)

• Record Type: Journal Article
• Authors: Ma, Haibin; Sun, Changning; Wang, Zhili; Jiang, Qing
• Is Part Of: Nanoscale. Volume 13:Issue 40(2021)
• Page Start: 17022
• Page End: 17027
• Publication Date: 2021-10-07
• Subjects: Nanoscience -- Periodicals; Nanotechnology -- Periodicals; 620.505
• DOI: 10.1039/d1nr05060e
• Languages: English
• ISSNs: 2040-3364

Abstract

Abstract : The S4.06 -NiCoVO x /NF electrode exhibits enhanced electrocatalytic activity for the oxygen evolution reaction via optimizing the electronic structure of active sites induced by S doping. Abstract : It is of great importance to develop efficient and low-cost oxygen evolution reaction (OER) electrocatalysts for electrochemical water splitting. Herein, S doped NiCoVO x nanosheets grown on Ni-Foam (S-NiCoVO x /NF) with a modified electronic structure have been prepared through a facile one-step hydrothermal method. The as-prepared S4.06 -NiCoVO x /NF exhibits outstanding OER activity with low overpotentials of 248 mV and 289 mV to deliver current densities of 10 mA cm −2 and 100 mA cm −2, respectively, and a small Tafel slope of 46.2 mV dec −1 in 1.0 M KOH electrolyte. These values are much lower than those obtained for most of the recently reported non-noble metal-based electrocatalysts under similar experimental conditions. This study provides a simple approach to rational design of efficient and cost-effective OER electrocatalysts for practical application of electrochemical water splitting.