Journal
ADVANCED MATERIALS
Volume 32, Issue 40, Pages -Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/adma.202000231
Keywords
core-shell; lattice strain; metal chalcogenide; nanohybrid; water splitting
Categories
Funding
- National Natural Science Foundation of China [U1601216, 51701139, 51972224]
- Young Elite Scientists Sponsorship Program by CAST [2018QNRC001]
Ask authors/readers for more resources
Developing highly-efficient non-noble-metal electrocatalysts for water splitting is crucial for the development of clean and reversible hydrogen energy. Introducing lattice strain is an effective strategy to develop efficient electrocatalysts. However, lattice strain is typically co-created with heterostructure, vacancy, or substrate effects, which complicate the identification of the strain-activity correlation. Herein, a series of lattice-strained homogeneous NiS(x)Se(1-)(x)nanosheets@nanorods hybrids are designed and synthesized by a facile strategy. The NiS(0.5)Se(0.5)with approximate to 2.7% lattice strain exhibits outstanding activity for hydrogen and oxygen evolution reaction (HER/OER), affording low overpotentials of 70 and 257 mV at 10 mA cm(-2), respectively, as well as excellent long-term durability even at a large current density of 100 mA cm(-2)(300 h), significantly superior to other benchmarks and the precious metal catalysts. Experimental and theoretical calculation results reveal that the generated lattice strain decreases the metal d-orbital overlap, leading to a narrower bandwidth and a closer d-band center toward the Fermi level. Thus, NiS(0.5)Se(0.5)possesses favorable H* adsorption kinetics for HER and lower energy barriers for OER. This work provides a new insight to regulate the lattice strain of advanced catalyst materials and further improve the performance of energy conversion technologies.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available