文献类型：期刊文献

英文题名：A Facile "Double-Catalysts" Approach to Directionally Fabricate Pyridinic N-B-Pair-Doped Crystal Graphene Nanoribbons/Amorphous Carbon Hybrid Electrocatalysts for Efficient Oxygen Reduction Reaction

作者：Fan, Mengmeng[1,2] Yuan, Qixin[1] Zhao, Yuying[2] Wang, Zeming[3] Wang, Ao[2] Liu, Yanyan[2,4] Sun, Kang[2] Wu, Jingjie[5] Wang, Liang[3] Jiang, Jianchun[1,2]

第一作者：Fan, Mengmeng

通信作者：Fan, MM[1];Jiang, JC[1];Fan, MM[2];Liu, YY[2];Jiang, JC[2];Wang, L[3];Liu, YY[4]

机构：[1]Nanjing Forestry Univ, Jiangsu Coinnovat Ctr Efficient Proc & Utilizat F, Int Innovat Ctr Forest Chem & Mat, Coll Chem Engn, Nanjing 210037, Peoples R China;[2]Chinese Acad Forestry, Key Lab Biomass Energy & Mat Jiangsu Prov, Jiangsu Coinnovat Ctr Efficient Proc & Utilizat F, Inst Chem Ind Forest Prod, Nanjing 210042, Peoples R China;[3]Shanghai Univ, Sch Environm & Chem Engn, Inst Nanochem & Nanobiol, Shanghai 200444, Peoples R China;[4]Henan Agr Univ, Coll Sci, Zhengzhou 450002, Henan, Peoples R China;[5]Univ Cincinnati, Dept Chem & Environm Engn, Cincinnati, OH 45221 USA

年份：2022

卷号：34

期号：13

外文期刊名：ADVANCED MATERIALS

收录：;EI(收录号：20220811671993);Scopus(收录号：2-s2.0-85124753422);WOS:【SCI-EXPANDED(收录号:WOS:000756599000001)】；

基金：M.F., Q.Y., and Y.Z. contributed equally to this work. This work was supported by National Natural Science Foundation of China (no. 51902162, 21901154), Jiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, International Innovation Center for Forest Chemicals and Materials, Nanjing Forestry University, merit-based funding for Nanjing innovation and technology projects, Shanghai Pujiang Program (21PJD022), and the Foundation of Jiangsu Key Lab of Biomass Energy and Material (JSBEM-S-202101).

语种：英文

外文关键词：amorphous carbon; carbon-based electrocatalyst; graphene nanoribbons; oxygen reduction reaction; pyridinic N; -B pairs

摘要：Carbon material is a promising electrocatalyst for the oxygen reduction reaction (ORR). Doping of heteroatoms, the most widely used modulating strategy, has attracted many efforts in the past decade. Despite all this, the catalytic activity of heteroatoms-modulated carbon is hard to compare to that of metal-based electrocatalysts. Here, a "double-catalysts" (Fe salt, H3BO3) strategy is presented to directionally fabricate porous structure of crystal graphene nanoribbons (GNs)/amorphous carbon doped by pyridinic N-B pairs. The porous structure and GNs accelerate ion/mass and electron transport, respectively. The N percentage in pyridinic N-B pairs accounts for approximate to 80% of all N species. The pyridinic N-B pair drives the ORR via an almost 4e(-) transfer pathway with a half-wave potential (0.812 V vs reversible hydrogen electrode (RHE)) and onset potential (0.876 V vs RHE) in the alkaline solution. The ORR catalytic performance of the as-prepared carbon catalysts approximates commercial Pt/C and outperforms most prior carbon-based catalysts. The assembled Zn-air battery exhibits a high peak power density of 94 mW cm(-2). Density functional theory simulation reveals that the pyridinic N-B pair possesses the highest catalytic activity among all the potential configurations, due to the highest charge density at C active sites neighboring B, which enhances the interaction strength with the intermediates in the p-band center.