Journal
JOURNAL OF MATERIALS CHEMISTRY A
Volume 5, Issue 45, Pages 23536-23542Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c7ta07672j
Keywords
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Funding
- National Basic Research Program of China [2015CB932200]
- Synergetic Innovation Center for Organic Electronics and Information Displays
- National Synergetic Innovation Center for Advanced Materials (SICAM)
- Natural Science Foundation of Jiangsu Province, China [BM2012010]
- Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD) [YX03001]
- Program for Changjiang Scholars and Innovative Research Team in University [IRT1148]
- NUPTSF [NY213103, NY214181, NY215077, NY215022]
- National Natural Science Foundation of China [51602161, 51372119, 61373135, 51576162]
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We report metallic NiPS3 nanoparticles decorated defective graphene (NiPS3@DG) as an efficient and durable electrocatalyst for the hydrogen evolution reaction (HER) at all pH values. The nanohybrids exhibited impressive low overpotentials (eta 10) of 73, 97, and 99 mV at -10 mA cm(-2) in acidic (pH similar to 0), neutral (pH 7) and alkaline (pH 14) electrolyte, respectively, which competes with (or even surpasses) commercial Pt/C (20 wt%) catalysts. Furthermore, the NiPS3@DG electrocatalyst displayed long-term stability and durability in a pH-universal medium as confirmed by a negligible decay in catalytic performances after 40 h of continuous working and 5000 voltammetric sweeping cycles. Theoretical calculations further revealed that the optimal free energy of the hydrogen adsorption process (which stems from a synergistic effect of S and P) provides tremendous contribution to the pH-universal HER process. The design strategy of the di-anion nanohybrid electrocatalyst highlights a new avenue for preparing cost-effective and pH-universal electrocatalysts.
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