Chemical and morphological transformation of MOF-derived bimetallic phosphide for efficient oxygen evolution. (August 2019)

• Record Type: Journal Article
• Authors: Wang, Xian; Chai, Lulu; Ding, Junyang; Zhong, Li; Du, Yujing; Li, Ting-Ting; Hu, Yue; Qian, Jinjie; Huang, Shaoming
• Is Part Of: Nano energy. Volume 62(2019)
• Page Start: 745
• Page End: 753
• Publication Date: 2019-08
• Subjects: Bimetallic phosphide -- Metal organic framework -- Carbon material -- Oxygen evolution reaction; Nanoscience -- Periodicals; Nanotechnology -- Periodicals; Nanostructured materials -- Periodicals; Power resources -- Technological innovations -- Periodicals; Nanoscience; Nanostructured materials; Nanotechnology; Power resources -- Technological innovations; Periodicals; 621.042
• DOI: 10.1016/j.nanoen.2019.06.002
• Languages: English
• ISSNs: 2211-2855

Abstract

Abstract: Environmentally friendly and efficient transition metal phosphide (TMP) electrocatalysts for oxygen evolution reaction (OER) are developed to meet the growing demand for clean energy. Here we report a novel and environmentally friendly strategy for the preparation of MOF-derived bimetallic phosphide embedded in the carbonaceous matrix (FeNiP/C ). With 3-dimensional hollow barrel shape and high specific surface, FeNiP/C-900 performs excellent OER catalytic performance, reaching a current density of 10 mA cm −2 at an overpotential of 229 mV with a low Tafel slope of 74.5 mV dec −1 . Meantime, we explore the thermal conversion mechanism of P-containing MOF and the compositional changes during heat treatment. Graphical abstract: Schematic illustration represents the synthesis of FeNiP/C composite, which is prepared by the self-assembly of Ni2+, H3TPO, and dabco to form BMM-10 microcrystals, followed by the treatment of the Fe3+ etching and direct pyrolyzation. In-situ formed FeNiP nanoparticles anchored on the carbon layer with 3D hollow structure performs an enhanced electrocatalyst activity for OER. Finally, the transformation mechanism of this P-contained BMM-10 is also well explored.Image 1 Highlights: A less toxic strategy to prepare porous MOF-derived transition metal phosphide nano-composites. The as-obtained hollowFeNiP/C-900 nano-composite possesses the high electrocatalytic activity for OER. The chemical bond and phase changes are discussed to form FeNiP/C nano-particles.