共 52 条
Chelating adsorption-engaged synthesis of ultrafine iridium nanoparticles anchored on N-doped carbon nanofibers toward highly efficient hydrogen evolution in both alkaline and acidic media
被引:39
作者:
Chen, Xiaojie
[1
]
Yan, Su
[1
]
Wen, Sisi
[2
]
Chen, Junjie
[2
]
Xu, Jiaqi
[1
]
Wang, Ce
[1
]
Lu, Xiaofeng
[1
]
机构:
[1] Jilin Univ, Alan G MacDiarmid Inst, Coll Chem, 2699 Qianjin St, Changchun 130012, Peoples R China
[2] Jilin Univ, Coll Chem, State Key Lab Supramol Struct & Mat, Changchun 130012, Peoples R China
基金:
中国国家自然科学基金;
关键词:
Iridium;
Polyaniline;
Chelating adsorption-engaged;
Carbon nanofibers;
Hydrogen evolution reaction;
TRANSITION-METAL;
ELECTROCATALYST;
IR;
NANOMATERIALS;
CATALYSTS;
STORAGE;
ALLOY;
D O I:
10.1016/j.jcis.2023.03.097
中图分类号:
O64 [物理化学(理论化学)、化学物理学];
学科分类号:
070304 ;
081704 ;
摘要:
Developing highly efficient and stable precious metal electrocatalysts toward hydrogen evolution reac-tion (HER) is crucial for energy application, while it is still challenging to achieve highly dispersed ultra -fine metal nanoparticles on some promising supports to synergistically promote their electrocatalytic performance. Herein, we propose a feasible chelating adsorption-engaged strategy by introducing de -doped polyaniline with abundant amino groups to immobilize ultrafine iridium (Ir) nanoparticles on their derived N-doped carbon nanofibers (Ir-NCNFs). Experimental results demonstrate that the synthesized Ir-NCNFs can effectively promote the charge transfer and expose more electrochemical active sites, which eventually accelerate the reaction kinetics. Thus, the synthesized Ir-NCNFs catalyst exhibits admirable HER activities in both alkaline and acidic conditions with overpotentials of only 23 and 8 mV, which are even superior or close to the benchmark Pt/C catalyst. Furthermore, the synthesized Ir-NCNFs catalyst also exhibits a long-term durability. This study affords a reliable means to construct high-performance supported ultrafine metal nanocatalysts for electrocatalytic applications to alleviate the growing demand for energy conversion.(c) 2023 Elsevier Inc. All rights reserved.
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页码:782 / 790
页数:9
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