The (In)Stability of Heterostructures During the Oxygen Evolution Reaction

被引：10

作者：

Mondal, Indranil ^{[1
,2
]}

Hausmann, J. Niklas ^{[3
]}

Mebs, Stefan ^{[4
]}

Kalra, Shweta ^{[1
]}

Vijaykumar, Gonela ^{[1
]}

Laun, Konstantin ^{[5
]}

Zebger, Ingo ^{[5
]}

Selve, Soeren ^{[6
]}

Dau, Holger ^{[4
]}

Driess, Matthias ^{[1
]}

Menezes, Prashanth W. ^{[1
,3
]}

机构：

[1] Tech Univ Berlin, Dept Chem Metalorgan & Inorgan Mat, Str 17 Juni 135,Sekr C2, D-10623 Berlin, Germany

[2] Indian Inst Sci Educ & Res Thiruvananthapuram, Sch Chem, Thiruvananthapuram 695551, Kerala, India

[3] Helmholtz Zentrum Berlin Mat & Energie, Mat Chem Grp Thin Film Catalysis CatLab, Albert Einstein Str 15, D-12489 Berlin, Germany

[4] Free Univ Berlin, Fachbereich Phys, Arnimallee 14, D-14195 Berlin, Germany

[5] Tech Univ Berlin, Dept Chem Phys Chem Biophys Chem, Str 17 Juni 135,Sekr PC14, D-10623 Berlin, Germany

[6] Tech Univ Berlin, Ctr Electron Microscopy ZELMI, Str 17 Juni 135,Sekr KWT2, D-10623 Berlin, Germany

来源：

ADVANCED ENERGY MATERIALS | 2024年 / 14卷 / 33期

关键词：

FeNiOOH; nickel iron oxyhydroxides; industrial OER conditions; interphase; precatalyst reconstruction; WATER OXIDATION; (OXY)HYDROXIDES; CATALYST;

D O I：

10.1002/aenm.202400809

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The urgent need for efficient oxygen evolution reaction (OER) catalysts has led to the development and publication of many heterostructured catalysts. The application of such catalysts with multiple phases tremendously increases the material design dimensions, and numerous interface-related effects can tune the OER performance. In this regard, multiple of these heterostructured electrodes show remarkable OER activities. However, it is not clear if these carefully designed interfaces remain under prolonged OER conditions. Herein, a molecular approach is used to synthesize four different nickel-iron phosphide (heterostructured) materials and deposit them on fluorine-doped tin oxide and nickel foam electrodes. The OER performance of the eight electrodes and the reconstruction of the four materials is investigated by in-situ spectroscopy after one day of operation, enabled by a freeze-quench approach. The most active electrode is also applied under industrial OER conditions and for the value-added oxidation of alcohols to ketones. Before catalysis, this electrode comprises crystalline 4 nm nickel phosphide particles on an amorphous iron phosphide matrix. However, after 24 h, a homogenous nickel-iron oxyhydroxide phase has formed. This work questions to which extent the design of heterostructures is a suitable strategy for non-noble metal OER catalysis. This study investigates the potential of heterostructure design as a strategy for non-noble metal oxygen evolution reaction (OER), employing molecularly derived nickel-iron phosphide heterostructures as a model. The catalyst exhibits remarkable activity for OER and proves effective for the oxidation of alcohols to ketones. The (in)stability of these heterostructures are thoroughly assessed under operating conditions using advanced in-situ and ex-situ techniques. image

引用

页数：11