CAS OpenIR  > 中科院上海应用物理研究所2011-2018年
Synergistic effect of an atomically dual-metal doped catalyst for highly efficient oxygen evolution
Liu, DB; Ding, SQ; Wu, CQ; Gan, W; Wang, CD; Cao, DF; Rehman, ZU; Sang, Y; Chen, SM; Zheng, XS; Wang, Y; Ge, BH; Song, L
2018
Source PublicationJOURNAL OF MATERIALS CHEMISTRY A
ISSN2050-7488
Volume6Issue:16Pages:6840-6846
Subtype期刊论文
AbstractThe oxygen evolution reaction (OER) involving multi-step electron transfer is a challenging approach for water-splitting due to its sluggish kinetics. It is desirable to explore more efficient electro-catalysts with earth-abundant elements. Herein, we employed a high-temperature polymerization method to develop a structure consisting of graphitic carbon nitride (g-C3N4) nanopatch enveloped carbon nanotubes (CNTs), where isolated Ni and Fe atoms were embedded into the tri-s-triazine units of g-C3N4 by forming a metal-N-x structure. The designed dual-metal catalyst exhibited remarkable OER performance with an extremely low overpotential (similar to 326 mV at 10 mA cm(-2)) and a small Tafel slope (67 mV per decade), which is superior to those of state-of-the-art electrocatalysts with metal-Nx coordination and the benchmark IrO2/C catalyst. In combination with atomic microscopy observations, our synchrotron-based X-ray absorption spectroscopy results revealed that, as compared to single-metal (Fe or Ni) doped hybrids, the electronic structures of both Ni and Fe atoms were reconfigured in the obtained dual-metal samples. Notably, increase of the oxidative state in Ni sites after multi-metal doping directly contributed to more active sites and favored the OER process, assisted by the porous structure and good electrical contacts between CNTs and g-C3N4. This investigation clearly demonstrated a unique synergistic effect in atomically dual-metal doped catalysts, thus it may provide a versatile route to regulate the electronic structures of single atomic catalysts through engineering of neighboring elements and coordination number.
KeywordWater Oxidation Nitride Nanosheets Reaction Oer Carbon Electrocatalysts Nanoparticles Reduction Graphene Cobalt Spectroscopy
DOI10.1039/c8ta00550h
Indexed BySCI
Language英语
WOS IDWOS:000431003600012
Citation statistics
Cited Times:6[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.sinap.ac.cn/handle/331007/29159
Collection中科院上海应用物理研究所2011-2018年
Affiliation1.Liu, DB
2.Ding, SQ
3.Wu, CQ
4.Gan, W
5.Wang, CD
6.Cao, DF
7.Rehman, ZU
8.Sang, Y
9.Chen, SM
10.Zheng, XS
11.Wang, Y
12.Ge, BH
13.Song, L
Recommended Citation
GB/T 7714
Liu, DB,Ding, SQ,Wu, CQ,et al. Synergistic effect of an atomically dual-metal doped catalyst for highly efficient oxygen evolution[J]. JOURNAL OF MATERIALS CHEMISTRY A,2018,6(16):6840-6846.
APA Liu, DB.,Ding, SQ.,Wu, CQ.,Gan, W.,Wang, CD.,...&Song, L.(2018).Synergistic effect of an atomically dual-metal doped catalyst for highly efficient oxygen evolution.JOURNAL OF MATERIALS CHEMISTRY A,6(16),6840-6846.
MLA Liu, DB,et al."Synergistic effect of an atomically dual-metal doped catalyst for highly efficient oxygen evolution".JOURNAL OF MATERIALS CHEMISTRY A 6.16(2018):6840-6846.
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