Lin-Lin Ma1, Xiao Hu2, Wu-Jun Liu3, Hong-Chao Li2, Paul K S Lam4, Raymond Jianxiong Zeng5, Han-Qing Yu6. 1. Department of Environmental Science & Engineering, University of Science & Technology of China, Hefei, 230026, China; USTC-CityU Joint Advanced Research Center, Suzhou, China. 2. Department of Environmental Science & Engineering, University of Science & Technology of China, Hefei, 230026, China. 3. Department of Environmental Science & Engineering, University of Science & Technology of China, Hefei, 230026, China. Electronic address: liuwujun@mail.ustc.edu.cn. 4. USTC-CityU Joint Advanced Research Center, Suzhou, China; State Key Laboratory in Marine Pollution, Department of Chemistry, City University of Hong Kong, Kowloon, Hong Kong, China. 5. Centre of Wastewater Resource Recovery, College of Resources and Environment, Fujian Agriculture and Forestry University, Fuzhou, China. 6. Department of Environmental Science & Engineering, University of Science & Technology of China, Hefei, 230026, China. Electronic address: hqyu@ustc.edu.cn.
Abstract
The large scale lignocellulosic biomass wastes could also be regarded as abundantly-available renewable resources, and how to convert them into value-added products via sustainable approaches is still a big challenge. In this work, we demonstrated a facile pyrolysis method to construct N, P-dually doped biochar materials from the lignocellulosic biomass wastes. The as-synthesized N, P-dually doped biochar samples could act as electrocatalysts for oxygen reduction and evolution reactions (ORR/OER), showing excellent catalytic performance and long-term durability, as well as robust tolerance to CO and methanol. The unique hierarchical porous structure, favorable electronic structure modified by the N and P doping, as well as a variety of defect sites induced by the N and P doping into the carbon framework were identified as the main contributions to the prominent catalytic activity of the as-synthesized N, P-dually doped biochar materials. We expect this work would spur more efforts into developing advanced materials from the large scale lignocellulosic biomass wastes.
The large scale lignocellulosic biomass wastes could also be regarded as abundantly-available renewable resources, and how to n>an class="Chemical">convert them into value-added products via sustainable approaches is still a big challenge. In this work, we demonstrated a facile pyrolysis method to construct N, P-dually doped biochar materials from the lignocellulosic biomass wastes. The as-synthesized N, P-dually doped biochar samples could act as electrocatalysts for oxygen reduction and evolution reactions (ORR/OER), showing excellent catalytic performance and long-term durability, as well as robust tolerance to CO and methanol. The unique hierarchical porous structure, favorable electronic structure modified by the N and P doping, as well as a variety of defect sites induced by the N and P doping into the carbon framework were identified as the main contributions to the prominent catalytic activity of the as-synthesized N, P-dually doped biochar materials. We expect this work would spur more efforts into developing advanced materials from the large scale lignocellulosic biomass wastes.