Revealing the Formation Mechanism and Optimizing the Synthesis Conditions of Layered Double Hydroxides for the Oxygen Evolution Reaction

被引：15

作者：

Chen, Zongkun ^{[1
]}

Wang, Xingkun ^{[2
]}

Han, Zhongkang ^{[3
]}

Zhang, Siyuan ^{[4
]}

Pollastri, Simone ^{[5
]}

Fan, Qiqi ^{[1
]}

Qu, Zhengyao ^{[6
]}

Sarker, Debalaya ^{[3
]}

Scheu, Christina ^{[4
]}

Huang, Minghua ^{[2
]}

Coelfen, Helmut ^{[1
]}

机构：

[1] Univ Konstanz, D-78457 Constance, Germany

[2] Ocean Univ China, Sch Mat Sci & Engn, Qingdao 266100, Peoples R China

[3] Max Planck Gesell, Fritz Haber Inst, D-14195 Berlin, Germany

[4] Max Planck Inst Eisenforsch GmbH, D-40237 Dusseldorf, Germany

[5] Elettra Sincrotrone Trieste, Trieste, Italy

[6] Agcy Sci Technol & Res, Singapore 138634, Singapore

来源：

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION | 2023年 / 62卷 / 10期

基金：

中国国家自然科学基金;

关键词：

Formation Mechanism; Layered Double Hydroxide; OH-; Concentration; Oxygen Evolution Reaction; In Situ Characterization; NIFE; ELECTROCATALYSTS; PRECIPITATION; NANOPARTICLES; NANOSHEETS; EXCHANGE;

D O I：

10.1002/anie.202215728

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Layered double hydroxides (LDHs), whose formation is strongly related to OH- concentration, have attracted significant interest in various fields. However, the effect of the real-time change of OH- concentration on LDHs' formation has not been fully explored due to the unsuitability of the existing synthesis methods for in situ characterization. Here, the deliberately designed combination of NH3 gas diffusion and in situ pH measurement provides a solution to the above problem. The obtained results revealed the formation mechanism and also guided us to synthesize a library of LDHs with the desired attributes in water at room temperature without using any additives. After evaluating their oxygen evolution reaction performance, we found that FeNi-LDH with a Fe/Ni ratio of 25/75 exhibits one of the best performances so far reported.

引用

页数：6

共 59 条

[1]

[Anonymous], 2016, ANGEW CHEM, V128, P11939

[2]

[Anonymous], 2018, ANGEW CHEM, V130, P178

[3]

[Anonymous], 2019, ANGEW CHEM, V131, P18284

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