期刊
ACS APPLIED MATERIALS & INTERFACES
卷 -, 期 -, 页码 -出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsami.2c13417
关键词
amorphous; crystalline coupling; rod-like core-shell; overall water splitting; electron redistribution; active site identification
资金
- National Natural Science Foundation of China
- Bintuan Science and Technology Program
- Key Research and Development Program of Hubei
- Guangdong Basic and Applied Basic Research Foundation
- Shenzhen Fundamental Research Fund
- [51972129]
- [52272202]
- [2020DB002]
- [2022DB009]
- [2020BAB079]
- [2019B1515120005]
- [JCYJ20190813172609404]
In this study, a novel bifunctional electrocatalyst, a/c-RuO2/Ni0.85Se nanorods, was reported to exhibit excellent HER and OER activities as well as long-term stability, providing a new solution for green hydrogen production.
The design of bifunctional electrocatalysts for hydrogen and oxygen evolution reactions delivering excellent catalytic activity and stability is highly desirable, yet challenged. Herein, we report an amorphous RuO2-encapsulated crystalline Ni0.85Se nanorod structure (termed as a/c-RuO2/Ni0.85Se) for enhanced HER and OER activities. The as-prepared a/c-RuO2/Ni0.85Se nanorods not only demonstrate splendid HER activity (58 mV@10 mA cm-2 vs RHE), OER activity (233 mV@10 mA cm-2 vs RHE), and electrolyzer activity (1.488 V@10 mA cm-2 vs RHE for overall water splitting) but also exhibit long-term stability with negligible performance decay after 50 h continuous test for overall water splitting. In addition, the variation of the d-band center (from the perspective of bonding and antibonding states) is unveiled theoretically by density functional theory calculations upon amorphous RuO2 layers coupling to clarify the increased hydrogen species adsorption for HER activity enhancement. This work represents a new pathway for the fabrication of bifunctional electrocatalysts toward green hydrogen
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