Applied Catalysis B: Environment and Energy ( IF 20.2 ) Pub Date : 2018-05-25 , DOI: 10.1016/j.apcatb.2018.05.073 Ji Eun Park , Mi-Ju Kim , Myung Su Lim , Sun Young Kang , Jong Kwan Kim , Seung-Hyeon Oh , Min Her , Yong-Hun Cho , Yung-Eun Sung
Graphitic carbon nitride-carbon nanofiber (g-CN-CNF) was synthesized as a bifunctional catalyst in an anion-exchange membrane water electrolyzer (AEMWE), and primary and rechargeable Zn–air cells. The g-CN-CNF catalyst shows high catalytic activity for oxygen reduction reaction and oxygen evolution reaction in half-cell, with low overpotentials and low Tafel slopes. The high activity is attributed to the synergistic effect of abundant active sites and the electrical conductivity following the pyrolysis of g-CN and CNF. As a result, AEMWE with the g-CN-CNF anode, the first application of a carbon-based catalyst, exhibits outstanding performance that is the highest record in the literature for AEMWE using a non-noble metal catalyst. In addition, the performance and durability of Zn-air cells with g-CN-CNF cathode outperform those fabricated with commercial platinum.
中文翻译:
负离子交换膜水电解槽和可充电金属-空气电池中作为石墨催化剂的石墨碳氮化碳-碳纳米纤维
石墨化的氮化碳-碳纳米纤维(g-CN-CNF)是在阴离子交换膜水电解槽(AEMWE)以及主要的可充电锌-空气电池中作为双功能催化剂合成的。g-CN-CNF催化剂对半电池中的氧还原反应和析氧反应具有很高的催化活性,具有低的超电势和低的Tafel斜率。高活性归因于丰富的活性位点和g-CN和CNF热解后的电导率的协同效应。结果,具有g-CN-CNF阳极的AEMWE(碳基催化剂的首次应用)显示出出色的性能,这是使用非贵金属催化剂的AEMWE文献中最高的记录。此外,