Journal
JOURNAL OF MATERIALS CHEMISTRY A
Volume 5, Issue 18, Pages 8493-8498Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c7ta01031a
Keywords
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Funding
- National Natural Science Foundation of China [51572003]
- Anhui Provincial Natural Science Foundation [1508085ME105, 1408085MB22]
- SRF for ROCS, SEM
- Technology Foundation for Selected Overseas Chinese Scholars, Ministry of Personnel of China
- China Scholarship Council
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Nickel phosphide (Ni2P) was grown on a graphitic carbon nitride (g-C3N4) surface by annealing a mixture of g-C3N4, NiCl2, and NaH2PO2 at 400 degrees C for 2 h in an Ar atmosphere. During the annealing, Ni2P particles formed intimate interfaces with g-C3N4. As a result, charge transfer from photo-excited g-C3N4 to Ni2P was improved as demonstrated by the improved photocatalytic H-2 generation (40.5 mu mol h(-1) g(-1)) compared to a physical mixture of Ni2P and g-C3N4 (trace H-2 generation). Under optimal and identical experimental conditions, the H-2 production rate on Ni2P-loaded g-C3N4 (2 wt%) is 82.5 mu mol h(-1) g(-1), which is higher than that of Pt-loaded g-C3N4 (0.5 wt%) (72 mu mol h(-1) g(-1)). Impressively, Ni2P shows a highly stable H-2 production activity despite being a non-noble metal co-catalyst. No activity loss occurs over repeated use and 24 h long-term H-2 generation trials. In contrast, a pronounced reduction in H-2 generation was observed for Pt-loaded g-C3N4 (0.5 wt%) over the same 24 hour trial period. Among their many advantages, including non-toxicity, low cost and natural abundance, Ni2P/g-C3N4 composites are a promising alternative for realizing efficient, long-lasting photocatalytic H-2 production.
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