查找使用阿拉丁产品的科研文献

Construction of anodic electron transfer chain based on CuCl2/TiOSO4 synergetic mediators for highly efficient conversion of biomass wastes into electricity at low temperature

Chenxing She,Xihong Zu,Zhiheng Yang,Liheng Chen,Zixin Xie,Hao Yang,Dongjie Yang,Guobin Yi,Yanlin Qin,Xuliang Lin,Wenli Zhang,Huafeng Dong,Xueqing Qiu

Biomass flow fuel cells (BFFCs) are promising alternatives for large-scale conversion of biomass into electricity at low temperature. However, most of them are based on single redox-active materials in anolyte which have limited capacity density and electron transfer rate, resulting in many natural biomass residues can’t generate electricity rapidly and efficiently. Herein, we develop a new anodic electron transfer chain based on CuCl 2 /TiOSO 4 synergetic mediators for BFFCs. The density functional theory (DFT) simulation and experiment results show that TiO 2+ /Ti 3+ redox couple works as an intermediate medium to construct a CuCl 2 /TiOSO 4 synergetic electron transfer chain, which strengthens the electron transfer rate between anolyte and graphite felt (GF) electrode. The CuCl 2 /TiOSO 4 synergetic mediators can efficiently and rapidly degrade glucose, industrial lignin and other natural biomasses at low temperature, and extract electrons simultaneously for generating electricity. The maximum power density (P max ) of CuCl 2 /TiOSO 4 -based BFFC is 146.7 mw·cm −2 when the anolyte is pre-reacted at 90 ℃ for 1 h with glucose as fuel and paired with VO 2 + /VO 2+ catholyte. And the fuel cell can discharge electricity continuously and stably for more than 6 h at 400 mA·cm −2 . Furthermore, it can stably power LED pattern with 92 bulbs. Besides, when the CuCl 2 /TiOSO 4 -based BFFC utilizes sodium lignosulfonate as fuel, its P max is 55.1 mW·cm −2 , and the BFFC can discharge electricity stably for more than 1 h at high output current density of 1.3 A·cm −2 . This work provides a promising approach for application in direct biomass wastes power generation.