Engineering multinary heterointerfaces in two-dimensional cobalt molybdenum phosphide hybrid nanosheets for efficient electrocatalytic water splitting. Issue 13 (14th June 2021)

• Record Type: Journal Article
• Authors: Teng, Yuan; Gao, Jia-Xin; Li, Jun-Yan; Chen, Hong-Yan; Wang, Xu-Dong; Kuang, Dai-Bin
• Is Part Of: Sustainable energy & fuels. Volume 5:Issue 13(2021)
• Page Start: 3458
• Page End: 3466
• Publication Date: 2021-06-14
• Subjects: Renewable energy sources -- Periodicals; Fuel cells -- Periodicals; Electric batteries -- Periodicals; Electrochemistry -- Periodicals; 660.297
• DOI: 10.1039/d1se00425e
• Languages: English
• ISSNs: 2398-4902

Abstract

Abstract : A Co–Mo–P NS with rich heterointerfaces was elaborately constructed by a facile successive phosphidation strategy. The multinary heterointerfaces can optimize the Δ G H* and the reaction kinetics, thus contributing to the enhanced catalytic activity. Abstract : Heterointerface engineering produces a marked effect for regulating the surface and interfacial properties of a catalyst. However, effective manipulation of the quantity and quality of heterointerfaces in two-dimensional (2D) lateral nanoscale is still an extremely urgent but daunting task. Herein, cobalt molybdenum phosphide hybrid nanosheets (Co–Mo–P NSs) are tactfully constructed via a successive phosphidation strategy. The as-created multinary heterointerfaces and their synergistic effects can optimize the hydrogen adsorption/desorption energy (Δ G H* ), as evidenced by density functional theory calculations, and improve the reaction kinetics. Moreover, the unique ultrathin nanosheet can maximize the exposure of interior atoms and heterointerfaces as reaction sites for catalysis, thus co-facilitating intrinsic catalytic activities. As an encouraging result, the optimized Co–Mo–P NSs exhibit considerable hydrogen evolution reaction (HER) performance, particularly with a 5.5 and 3.0 times higher turnover frequency than bare MoP and CoP, respectively. Moreover, it also exhibits superior oxygen evolution reaction (OER) activity ( η 10 = 261.9 mV) and profound full water decomposition behavior. This research proposes a facile strategy to controllably construct multinary heterointerfaces within 2D transition metal phosphide nanosheets, which might provide new insights into designing other advanced electrocatalysts.