Beijing National Laboratory for Molecular Sciences (BNLMS), Key Laboratory of Green Printing, Institute of Chemistry, Chinese Academy of Sciences, Zhongguancun North First Street 2, Beijing 100190, China; University of Chinese Academy of Sciences, Beijing 100049, China.
Beijing National Laboratory for Molecular Sciences (BNLMS), Key Laboratory of Green Printing, Institute of Chemistry, Chinese Academy of Sciences, Zhongguancun North First Street 2, Beijing 100190, China.
Bioresour Technol. 2016 Aug;214:348-354. doi: 10.1016/j.biortech.2016.04.111. Epub 2016 Apr 26.
A novel low-cost adsorbent derived and in situ nitrogen/iron co-doped carbon (N/Fe-C) with three-dimensional porous structure is employed as efficient oxygen reduction catalyst in microbial fuel cells (MFCs). The electrochemical active area is significantly improved to 617.19m(2)g(-1) in N/Fe-C by Fe-doping. And N/Fe-C (4.21at.% N, 0.11at.% Fe) exhibits excellent electrocatalytic activity with the oxygen reduction potential of -0.07V (vs. Ag/AgCl) which is comparable to commercial Pt/C. In MFCs tests, the maximum power density and output voltage with N/Fe-C are enhanced to 745mWm(-2) and 562mV (external resistance 1kΩ), which are 11% and 0.72% higher than Pt/C (0.5mgPtcm(-2)), respectively. Besides, the long-term stability of N/Fe-C retains better for more than one week. Moreover, the charge transfer resistance (Rct) values are recorded by the impedance measurements, and the low Rct of N/Fe-C is also result in better catalytic activity.
一种新型的低成本吸附剂，由原位氮/铁共掺杂的具有三维多孔结构的碳（N/Fe-C）衍生而来，可作为微生物燃料电池（MFCs）中的高效氧还原催化剂。通过铁掺杂，N/Fe-C 的电化学活性面积显著提高至 617.19m(2)g(-1)。并且 N/Fe-C（4.21at.% N，0.11at.% Fe）表现出优异的电催化活性，其氧还原电位为-0.07V（相对于 Ag/AgCl），可与商业 Pt/C 相媲美。在 MFCs 测试中，用 N/Fe-C 提高了最大功率密度和输出电压，分别达到 745mWm(-2)和 562mV（外部电阻 1kΩ），比 Pt/C（0.5mgPtcm(-2)）分别提高了 11%和 0.72%。此外，N/Fe-C 的长期稳定性保留更好，超过一周。此外，通过阻抗测量记录了电荷转移电阻（Rct）值，N/Fe-C 的低 Rct 也导致了更好的催化活性。
