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Topochemical Synthesis of Two‐Dimensional Transition‐Metal Phosphides Using Phosphorene Templates
Author(s) -
Yang Sheng,
Chen Guangbo,
Ricciardulli Antonio Gaetano,
Zhang Panpan,
Zhang Zhen,
Shi Huanhuan,
Ma Ji,
Zhang Jian,
Blom Paul W. M.,
Feng Xinliang
Publication year - 2020
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/anie.201911428
Subject(s) - phosphorene , template , transition metal , materials science , nanotechnology , metal , chemistry , metallurgy , catalysis , organic chemistry , graphene
Abstract Transition‐metal phosphides (TMPs) have emerged as a fascinating class of narrow‐gap semiconductors and electrocatalysts. However, they are intrinsic nonlayered materials that cannot be delaminated into two‐dimensional (2D) sheets. Here, we demonstrate a general bottom‐up topochemical strategy to synthesize a series of 2D TMPs (e.g. Co 2 P, Ni 12 P 5 , and Co x Fe 2−x P) by using phosphorene sheets as the phosphorus precursors and 2D templates. Notably, 2D Co 2 P is a p‐type semiconductor, with a hole mobility of 20.8 cm 2 V −1 s −1 at 300 K in field‐effect transistors. It also behaves as a promising electrocatalyst for the oxygen evolution reaction (OER), thanks to the charge‐transport modulation and improved surface exposure. In particular, iron‐doped Co 2 P (i.e. Co 1.5 Fe 0.5 P) delivers a low overpotential of only 278 mV at a current density of 10 mA cm −2 that outperforms the commercial Ir/C benchmark (304 mV).