期刊
NANOSCALE
卷 14, 期 14, 页码 5430-5438出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/d2nr00423b
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资金
- Natural Science Foundation of Hebei Province [E2019201277, B2021201034]
- Science and Technology Project of Hebei Education Department [QN2020213]
- National Natural Science Foundation of China [52102095]
- Undergraduate Innovation and Entrepreneurship Training Program of Hebei University [WL20211008, WL20211004, 2021170]
Packaging electrocatalysts with carbon shells can enhance the stability and efficiency of hydrogen evolution reaction (HER) materials. An ultrathin N-doped carbon-coated self-supported WP nanowire array (WP@NC NA) hybrid has been synthesized, which exhibits improved physicochemical stability, active sites, and conductivity. The carbon shell optimizes various steps in both acidic and alkaline HER reactions. These findings provide scientific guidance for the packaging design of carbon-encapsulating self-supported electrocatalysts.
Packaging electrocatalysts with carbon shells offers an opportunity to develop stable and effective hydrogen evolution reaction (HER) materials. Here, an ultrathin N-doped carbon-coated self-supported WP nanowire array (WP@NC NA) hybrid has been synthesized. Owing to the encapsulation of the ultrathin N-doped carbon shell on the WP surface, the as-prepared WP@NC NA hybrid exhibits enhanced physicochemical stability, more active sites, and superior conductivity compared with WP NA without carbon coating. Besides, density functional theory calculations demonstrate that the carbon shell can optimize the hydrogen adsorption step in the acidic HER, and simultaneously facilitate water physical adsorption, water dissociation, and hydroxyl group desorption steps during the alkaline HER. These findings demonstrate the intrinsic mechanism of how a carbon shell promotes the acidic and alkaline HER kinetics, and provide scientific guidance for the packaging design of promising carbon-encapsulating self-supported electrocatalysts.
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