文献类型：期刊文献

英文题名：Walnut shell-derived hierarchical porous carbon with high performances for electrocatalytic hydrogen evolution and symmetry supercapacitors

作者：Fu, Hai-hai[1];Chen, Long[1];Gao, Haojie[1];Yu, Xiaokun[1];Hou, Juan[1];Wang, Gang[1];Yu, Feng[1];Li, Haoquan[1];Fan, Changchun[1];Shi, Yu-lin[1];Guo, Xuhong[1,2]

机构：[1]Shihezi Univ, Sch Chem & Chem Engn, Key Lab Green Proc Chem Engn Xinjiang Bingtuan, Shihezi 832003, Peoples R China;[2]East China Univ Sci & Technol, State Key Lab Chem Engn, Shanghai 200237, Peoples R China

年份：2020

卷号：45

期号：1

起止页码：443

外文期刊名：INTERNATIONAL JOURNAL OF HYDROGEN ENERGY

收录：;EI(收录号：20194807740029);WOS:【SCI-EXPANDED(收录号:WOS:000509628800034)】；

基金：This work was supported by the National Natural Science Foundation of China (51962032, 21865025, 61704114 and 51764049), the Project-sponsored by Scientific Research Startup Fund for High -Level Talents, Shihezi University (KX0138), the National Natural Science Foundation of China (21865025) and the Opening Project of The Key Laboratory for Green Processing of Chemical Engineering of Xinjiang Bingtuan (KF201704).

语种：英文

外文关键词：Walnut shell derived hierarchica porous carbon; High specific micropore area; Hydrogen evolution reaction; Supercapacitors

摘要：Walnut Shell-derived hierarchical porous carbon has been successfully synthesized by the efficient KOH activation process. The hierarchical porous carbon material activated at 600 degrees C, has the specific micropore area of 1037.31 m(2) g(-1) and micropore volume of 0.51 cm(3) g(-1), which leads to have electrochemical performances of the hydrogen evolution reaction (HER) and supercapacitors. Specifically, as the hydrogen evolution reaction electrocatalyst, the walnut shell-derived carbon material activated at 600 degrees C exhibits a lower onset potential of 6.00 mV, a smaller Tafel slope of 69.76 mV dec(-1) and outstanding stability above long-term cycling. As a supercapacitor electrode material, the sample possesses specific capacitance of 262.74 F g(-2) at 0.5 A g(-1), the remarkable rate capability of 224.60 F g(-1) at even 10 A g(-1) and good long-term stability. A symmetric supercapacitor shows the highly energy density of 7.97 Wh kg(-1) at a power density of 180.80 W kg(-1). This novel and low-cost biomass material is very promising for the electrocatalytic water splitting and supercapacitors. (C) 2019 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.