Electronic and structural engineering of NiCo2O4/Ti electrocatalysts for efficient oxygen evolution reaction. (8th March 2021)

• Record Type: Journal Article
• Authors: Bao, Weiwei; Xiao, Lei; Zhang, Junjun; Jiang, Peng; Zou, Xiangyu; Yang, Chunming; Hao, Xiaoli; Ai, Taotao
• Is Part Of: International journal of hydrogen energy. Volume 46:Number 17(2021)
• Page Start: 10259
• Page End: 10267
• Publication Date: 2021-03-08
• Subjects: Electronic structure engineering -- Coupled interface -- NiCo2O4/Ti -- Oxygen evolution reaction -- Titanium; Hydrogen as fuel -- Periodicals; Hydrogène (Combustible) -- Périodiques; Hydrogen as fuel; Periodicals; 665.81
• DOI: 10.1016/j.ijhydene.2020.12.126
• Languages: English
• ISSNs: 0360-3199

Abstract

Abstract: The oxygen evolution reaction (OER) involves four electron transfer processes and is of great significance in water electrolysis. The development of efficient and robust non-precious OER electrocatalysts remains a critical challenge for the production, storage and conversion of renewable energy. Herein, vertically NiCo2 O4 nanosheets are grown on Ti mesh via a facile solvothermal method which is followed by low-temperature calcination. The NiCo2 O4 /Ti catalyst exhibits outstanding OER performance with a low overpotential of 353 mV to drive the current density of 10 mA cm −2 and a Tafel slope of 61 mV dec −1 in alkaline solution. Moreover, the stable electrocatalyst undergoes negligible degradation in alkaline media at least 20 h. The acceleration of the electrochemical OER likely stems from the facile electron transfer promoted by the NiCo2 O4 /Ti interface as revealed by X-ray photoelectron spectroscopy. This work introduces a novel strategy for the establishment low-cost electrocatalysts for electrochemical water splitting. Graphical abstract: Electronic and Structural Engineering: The optimal NiCo2 O4 /Ti heterostructured catalyst demonstrates remarkable OER performance and long-term durability. This research provides a useful strategy of electronic and structural engineering to develop highly efficient non-noble-based electrocatalysts for water spitting and other energy conversion processes.. Image 1 Highlights: The NiCo2 O4 /Ti heterostructure demonstrates remarkable OER performance. The NiCo2 O4 /Ti delivers the 10 mA cm -2 at overpotential as low as 353 mV. The research provides an useful electronic and structural engineering for OER.