21September2020

Nano-Micro Letters

2D Layered Double Hydroxide Nanosheets and Their Derivatives Toward Efficient Oxygen Evolution Reaction

Xueyi Lu1, #, Hairong Xue1, #, Hao Gong1, Mingjun Bai1, Daiming Tang1, Renzhi Ma1, *, Takayoshi Sasaki1, *

Abstract
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Nano-Micro Lett. (2020) 12: 86

First Online: 06 April 2020 (Review)

DOI:10.1007/s40820-020-00421-5

*Corresponding author. E-mail: Ma.Renzhi@nims.go.jp (Renzhi Ma);  Sasaki.Takayoshi@nims.go.jp (Takayoshi Sasaki)

 

Abstract

 


Toc

Layered double hydroxides (LDHs) have attracted tremendous research interest in widely spreading applications. Most notably, transition metal bearing LDHs are expected to serve as highly active electrocatalysts for oxygen evolution reaction (OER) due to their layered structure combined with versatile compositions. Furthermore, reducing the thickness of platelet LDH crystals to nanometer or even molecular scale via cleavage or delamination provides an important clue to enhance the activity. In this review, recent progresses on rational design of LDH nanosheets are reviewed, including direct synthesis via traditional coprecipitation, homogeneous precipitation, and newly developed topochemical oxidation as well as chemical exfoliation of parent LDH crystals. In addition, diverse strategies are introduced to modulate their electrochemical activity by tuning the composition of host metal cations and intercalated counter anions, incorporating dopants, cavities and single atoms. In particular, hybridizing LDHs with conductive components or in-situ growing them on conductive substrates to produce freestanding electrodes can further enhance their intrinsic catalytic activity. A brief discussion on future research directions and prospects is also summarized.


 

Keywords

Layered double hydroxides, Nanosheets, Derivatives, Catalysts, Oxygen evolution reaction

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