期刊
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
卷 59, 期 18, 页码 7245-7250出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.202001703
关键词
hydroxides; nanocomposites; oxygen evolution; silver; spontaneous redox reaction
资金
- National Natural Science Foundation of China [51972224, U1601216] Funding Source: Medline
- Natural Science Foundation of Tianjin City [17JCQNJC02100] Funding Source: Medline
- China Association for Science and Technology [2018QNRC001] Funding Source: Medline
The fabrication of metal-supported hybrid structures with enhanced properties typically requires external energy input, such as pyrolysis, photolysis, and electrodeposition. In this study, silver-nanoparticle-decorated transition-metal hydroxide (TMH) composites were synthesized by an approach based on a spontaneous redox reaction (SRR) at room temperature. The SRR between silver ions and TMH provides a simple and facile route to establish effective and stable heterostructures that can enhance the oxygen evolution reaction (OER) activity. Ag@Co(OH)(x) grown on carbon cloth exhibits outstanding OER activity and durability, even superior to IrO2 and many previously reported OER electrocatalysts. Experimental and theoretical analysis demonstrates that the strong electronic interaction between Ag and Co(OH)(2) activates the silver clusters as catalytically OER active sites, effectively optimizing the binding energies with reacted intermediates and facilitating the OER kinetics.
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