Atomic Fe hetero-layered coordination between g-C3N4 and graphene nanomeshes enhances the ORR electrocatalytic performance of zinc-air batteries
Atomic Fe hetero-layered coordination between g-C3N4 and graphene nanomeshes enhances the ORR electrocatalytic performance of zinc-air batteries
复制标题
g-C3N4和石墨烯纳米网之间的原子Fe异质层配位增强了锌空气电池的ORR电催化性能
DOI：
10.1039/c8ta09722d
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发表时间：
2019
影响因子：
11.9
通讯作者：
Wang Junzhong
中科院分区：
文献类型：
--
作者：
Wang Congwei;Zhao Huifang;Wang Jie;Zhao Zheng;Cheng Miao;Duan Xiaoyong;Zhang Qin;Wang Junying;Wang Junzhong
g-C3 N4和石墨烯纳米网之间的异质层状铁-氮配位被开发用于氧还原反应中的上级电催化活性。与g-C3 N4或嵌入g-C3 N4中的原子Fe在氧还原反应中的性能相比，原子Fe、g-C3 N4和石墨烯的二维异质杂化物在-0.5 V下的电流密度提高了13倍，杂化物的半波电位正移到0.278 V，表现出上级的电催化活性，半波电位比杂化物的正半波电位高20 mV。波电位、更高的电流密度、更好的甲醇耐受性和更长期的稳定性。这种增强源于网格上的网格暴露层间桥接的Fe-N4.1配位活性中心之间的g-C3 N4和石墨烯，这有利于四电子途径伴随着电导率和质量传输的改善。该混合型锌空气电池具有良好的上级性能，在20 h的循环中具有较低的充放电电压间隙。这种在不同二维材料之间异质层状界面金属-氮配位的策略是开发用于可持续能源应用的先进电催化剂的一般方法。
Hetero-layered iron–nitrogen coordination between g-C3N4 and graphene nanomeshes was developed for superior electrocatalytic activity in the oxygen reduction reaction. Compared with the performance of g-C3N4 or atomic Fe embedded in g-C3N4 in the oxygen reduction reaction, the current density at −0.5 V of the two-dimensional hetero-hybrid of atomic Fe, g-C3N4 and graphene was enhanced 13 times, and the half-wave potential of the hybrid positively shifted to 0.278 V. The hybrid exhibited superior electrocatalytic activity with a 20 mV more positive half-wave potential, higher current density, better methanol tolerance and longer-term stability compared to commercial Pt–C. This enhancement originated from mesh-on-mesh exposed inter-layer bridged Fe–N4.1 coordination active sites between g-C3N4 and graphene, which favored a four-electron pathway accompanied by the improvement of the conductivity and mass transport. Superior performance, including a low charge–discharge voltage gap over 20 h of cyling, of the hybrid-based Zn–air battery was achieved. This strategy of the hetero-layered interfacial metal–nitrogen coordination between different 2D materials is a general approach to develop advanced electrocatalysts for sustainable energy applications.