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
发表期刊JOURNAL OF MATERIALS CHEMISTRY A
ISSN2050-7488
卷号6期号:16页码:6840-6846
文章类型期刊论文
摘要The 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.
关键词Water Oxidation Nitride Nanosheets Reaction Oer Carbon Electrocatalysts Nanoparticles Reduction Graphene Cobalt Spectroscopy
DOI10.1039/c8ta00550h
收录类别SCI
语种英语
WOS记录号WOS:000431003600012
引用统计
被引频次:2[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.sinap.ac.cn/handle/331007/29159
专题中科院上海应用物理研究所2011-2018年
作者单位1.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
推荐引用方式
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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