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

Author:

Chen Zongkun1,Wang Xingkun2,Han Zhongkang3,Zhang Siyuan4,Pollastri Simone5,Fan Qiqi1,Qu Zhengyao6,Sarker Debalaya3,Scheu Christina4,Huang Minghua2,Cölfen Helmut1ORCID

Affiliation:

1. University of Konstanz 78457 Konstanz Germany

2. School of Materials Science and Engineering Ocean University of China 266100 Qingdao China

3. Fritz-Haber-Institut der Max-Planck-Gesellschaft 14195 Berlin Germany

4. Max-Planck-Institut für Eisenforschung GmbH 40237 Düsseldorf Germany

5. Elettra-Sincrotrone Trieste Basovizza Trieste Italy

6. Agency for Science Technology and Research Singapore 138634 Singapore

Abstract

AbstractLayered 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.

Funder

Chinesisch-Deutsche Zentrum für Wissenschaftsförderung

National Natural Science Foundation of China

Publisher

Wiley

Subject

General Chemistry,Catalysis

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