文献类型：期刊文献

英文题名：Sustainable Route for Molecularly Thin Cellulose Nanoribbons and Derived Nitrogen-Doped Carbon Electrocatalysts

作者：Lu, Yun[1,3] Ye, Guichao[1,2] She, Xilin[2] Wang, Siqun[1,4] Yang, Dongjiang[2,5,6] Yin, Yafang[1]

第一作者：卢芸;Lu, Yun

通信作者：Lu, Y[1];Yin, YF[1];Yang, DJ[2];Lu, Y[3];Yang, DJ[4];Yang, DJ[5]

机构：[1]Chinese Acad Forestry, Res Inst Wood Ind, Dept Wood Anat & Utilizat, Yard 1,Xiangshan Rd, Beijing 100091, Peoples R China;[2]Qingdao Univ, Collaborat Innovat Ctr Marine Biomass Fibers Mat, Sch Environm Sci & Engn, 308 Ningxia Rd, Qingdao 266071, Peoples R China;[3]Northeast Forestry Univ, Key Lab Biobased Mat Sci & Technol, Minist Educ, 26 Hexing Rd, Harbin 150040, Heilongjiang, Peoples R China;[4]Univ Tennessee, Ctr Renewable Carbon, 527 Andy Holt Tower, Knoxville, TN 37996 USA;[5]Griffith Univ, QMNC, Nathan Campus,170 Kessels Rd, Brisbane, Qld 4111, Australia;[6]Taiyuan Univ Technol, Key Lab Coal Sci & Technol, Minist Educ & Shanxi Prov, 79 West Yingze Ave, Taiyuan 030024, Shanxi, Peoples R China

年份：2017

卷号：5

期号：10

起止页码：8729-8737

外文期刊名：ACS SUSTAINABLE CHEMISTRY & ENGINEERING

收录：;EI(收录号：20174104241832);Scopus(收录号：2-s2.0-85030452614);WOS:【SCI-EXPANDED(收录号:WOS:000412382700029)】；

基金：This work was financially supported by the Special Fund for Forest Scientific Research in the Public Welfare (no. 201504603), the National Natural Science Foundation of China (nos. 31500468 and 51473081), and the Key Laboratory of Bio-Based Material Science & Technology (Northeast Forestry University), Ministry of Education (no. SWZCL2016-01). We are especially grateful to Dr. Liu Hongwei of the Australian Center for Microscopy & Microanalysis (ACMM), The University of Sydney, and to Ms. Yan Xiaomei previously of Qingdao University.

语种：英文

外文关键词：Cellulose; TEMPO; Nanoribbons; Oxygen reduction; Zn-air battery

摘要：Ultrathin cellulose nanoribbons were extracted from earth-abundant biomass using 2,2,6,6-tetramethylpiperidine-1-oxylcatalyzed (TEMPO-catalyzed) oxidation and sonication processes. By two TEMPO-oxide systems with different processing times, TEM and AFM observations indicate the obtained cellulose nanoribbons (Cel-NRs) with dimensions of 400-800 nm in length, 1.72-2.54 nm in width, and 0.78-2.67 nm in thickness. The dimension data indicate that the Cel-NRs from the TEMPO/NaBr/NaC1O system are much shorter but contain more cellulose chains than those from the TEMPO/NaClO/NaClO2 system. Moreover, these abundant biomass nanoribbons were fabricated from direct pyrolysis with NH3 activation. The obtained highly active nitrogen-doped carbon nanoribbons (N-CNRs) and metal-free oxygen reduction reaction (ORR) electrocatalysts show superb ORR activity (half-wave potential of 0.71 and 0.73 V versus reversible hydrogen electrode) and high selectivity (electron-transfer number of 3.26 and 3.74 at 0.8 V), comparable current density and onset potential (0.906 and 0.926 V), excellent electrochemical stability (higher than 89.5% and 91.6% after 20 000 potential cycles) in alkaline media, and better resistance to crossover effects in the ORR. More importantly, when used as a cathode catalyst for constructing the air electrode of the Zn air battery, the N-CNRs exhibit super. long-term stability and a capacity of 587 and 583 mAh g(-1) at the discharge current densities of 5 and 20 mA cm(-2), respectively, which are highly comparable with those of the state-of-the-art Pt/C catalyst (20 wt % Pt, Hispec 3000). This indicates that our present work is the first example of using atomically thin carbon nanoribbons as the metal-free electrocatalyst substitution to Pt for developing high-performance metal air batteries from earth abundant terrestrial plants.