噻吩
化学
气凝胶
氮气
生物炭
单独一对
反键分子轨道
碳纤维
无机化学
光化学
分子
材料科学
有机化学
原子轨道
电子
纳米技术
复合数
物理
复合材料
量子力学
热解
作者
Xiaokang Chen,Lijie Zhang,Wenjia Xu,Xin Ding,Shuai Chen,Xilin She,Xiangxin Guo,Chung‐Li Dong,Yu‐Cheng Huang,Lixue Zhang,Shaohua Shen,Dongjiang Yang
标识
DOI:10.1016/j.apcatb.2022.121425
摘要
Algae contains most of the marine biogenic S, and is the main producer of dimethylsulfide, of which oxidation products contribute ~ 40% acidity of the acid rain. The biogenic S of red algae mainly exists in carrageenan molecules. In this work, 89% of C and 96% of biogenic S in carrageenan was synchronically fixed into biochar to form thiophene S decorated biochar aerogel (SCA), efficiently preventing the loss of C and S elements. More importantly, the presence of thiophene S structure in SCA can “push” electrons into the antibonding orbitals of N2, and simultaneously “pull” the lone-pair electrons from N2, thus endowing the SCA super activity for nitrogen reduction reaction. Experimentally, its NH3 yield rate reaches high as 36.69 μg h−1 mg−1cat, surpassing most metal-free electrocatalysts. Theoretical calculations demonstrate that the thiophene S can promote the absorption and activation of N2, and efficiently lower the energy barrier of N2 protonation.
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