Self‐Assemble and In Situ Formation of Ni1−xFexPS3 Nanomosaic‐Decorated MXene Hybrids for Overall Water Splitting. Issue 26 (6th August 2018)

• Record Type: Journal Article
• Authors: Du, Cheng‐Feng; Dinh, Khang Ngoc; Liang, Qinghua; Zheng, Yun; Luo, Yubo; Zhang, Jianli; Yan, Qingyu
• Is Part Of: Advanced energy materials. Volume 8:Issue 26(2018)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2018-08-06
• Subjects: metal phosphorus trisulfides -- MXene -- nanohybrids -- overall water splitting -- self‐assembly; Energy harvesting -- Materials -- Periodicals; Energy conversion -- Materials -- Periodicals; Energy storage -- Materials -- Periodicals; Photovoltaics -- Periodicals; Fuel cells -- Periodicals; Thermoelectric materials -- Periodicals; 621.31
• DOI: 10.1002/aenm.201801127
• Languages: English
• ISSNs: 1614-6832

Abstract

Abstract: Herein, the authors present the development of novel 0D–2D nanohybrids consisting of a nickel‐based bimetal phosphorus trisulfide (Ni1− x Fe x PS3 ) nanomosaic that decorates on the surface of MXene nanosheets (denoted as NFPS@MXene). The nanohybrids are obtained through a facile self‐assemble process of transition metal layered double hydroxide (TMLDH) on MXene surface; followed by a low temperature in situ solid‐state reaction step. By tuning the Ni:Fe ratio, the as‐synthesized NFPS@MXene nanohybrids exhibit excellent activities when tested as electrocatalysts for overall water splitting. Particularly, with the initial Ni:Fe ratio of 7:3, the obtained Ni0.7 Fe0.3 PS3 @MXene nanohybrid reveals low overpotential (282 mV) and Tafel slope (36.5 mV dec −1 ) for oxygen evolution reaction (OER) in 1m KOH solution. Meanwhile, the Ni0.9 Fe0.1 PS3 @MXene shows low overpotential (196 mV) for the hydrogen evolution reaction (HER) in 1m KOH solution. When integrated for overall water splitting, the Ni0.7 Fe0.3 PS3 @MXene || Ni0.9 Fe0.1 PS3 @MXene couple shows a low onset potential of 1.42 V and needs only 1.65 V to reach a current density of 10 mA cm −2, which is better than the all noble metal IrO2 || Pt/C electrocatalyst (1.71 mV@10 mA cm −2 ). Given the chemical versatility of Ni1− x Fe x PS3 and the convenient self‐assemble process, the nanohybrids demonstrated in this work are promising for energy conversion applications. Abstract : Novel 0D–2D nanohybrids consisting of a nickel‐based bimetal phosphorus trisulfide (Ni1− x Fe x PS3 ) nanomosaic that decorates the surface of MXene nanosheets are obtained through a facile self‐assembly process. The Ni0.7 Fe0.3 PS3 @MXene reveals low overpotential (282 mV) and Tafel slope (36.5 mV dec −1 ) for oxygen evolution reaction (OER) and the Ni0.7 Fe0.3 PS3 @MXene || Ni0.9 Fe0.1 PS3 @MXene couple shows good overall water splitting performance.