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.
引用
收藏
页码:782 / 790
页数:9
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