期刊
APPLIED CATALYSIS B-ENVIRONMENTAL
卷 315, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.apcatb.2022.121577
关键词
Hydrogen evolution; Phase engineering; Energy band-gradient; P-n junction
资金
- National Natural Science Foundation of China [51872162, 11890700]
- Universities Twenty Foundational Items of Jinan City [2021GXRC039]
- Key R&D Innovation Program of Shandong Province-Major Innovation Project [2019TSLH0116]
- Shandong Provincial Natural Science Foundation [ZR2021QE255]
- National Natural Science Foundation of China [51872162, 11890700]
- Universities Twenty Foundational Items of Jinan City [2021GXRC039]
- Key R&D Innovation Program of Shandong Province-Major Innovation Project [2019TSLH0116]
- Shandong Provincial Natural Science Foundation [ZR2021QE255]
This study presents a novel conceptual design based on phase engineering theory to enhance the spatial transportation of photocarriers in efficient photocatalytic hydrogen evolution. The introduction of black phosphorus nanodots extends the utilization of incident photons, resulting in improved hydrogen evolution activity and quantum yields. This strategy provides insights for the design of superior photocatalytic systems with enhanced solar conversion efficiency.
As one of appealing storage patterns of solar energy, the efficient photocatalytic hydrogen evolution from water splitting has great potentiality in sustainable development for renewable energy, but it still suffers the low conversion level due to sluggish spatial behavior of photocarriers. Herein, on the basis of phase engineering theory, a novel conceptual design of energy band-gradient distribution is presented to consolidate the spatial transportation continuity of photocarriers, which is realized in the phase junction of CdS for the first time. Further being integrated with black phosphorus (BP) nanodots, the utilization of incident photons is extended to cover broad solar light-responsive window, and the p-n junctions with powerful internal electric fields resemble many accelerators distributed on the energy band-gradient pathway, thus furnishing sufficient internal dynamical transfer force for separation and migration of photocarriers with prolonged lifetime. The peculiar compound photocatalyst exhibits an excellent hydrogen evolution activity of 163.65 mu mol.h(-1).g(-1 ) and 5.72 mmol.h(-1).g(-1), as well as high apparent quantum yields (0.73 % and 25.7 % at 420 nm) under different conditions (with or without sacrificial agents). This study proposes a new exploitation strategy for the manipulation of energy band-gradient configuration in designing superior photocatalytic systems with available solar conversion efficiency.
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