当前位置: X-MOL 学术Appl. Surf. Sci. › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
Fe3C decorated, N-doped porous carbon as cost-effective and efficient catalyst for oxygen reduction reaction
Applied Surface Science ( IF 6.3 ) Pub Date : 2022-10-31 , DOI: 10.1016/j.apsusc.2022.155456
Gongke Wang , Wanli Wang , Ye Chen , Changling Yan , Zhiyong Gao

The catalytic activity, stability and methanol tolerance for alkali oxygen reduction reaction (ORR) of cathode are pivotal metrics determining the actual performance of methanol fuel-cell. Carbonaceous materials with heteroelement doping and guest catalytic component hybriding are promising ways to improve the above metrics for ORR and simultaneously reduce the cost, therefore hold bright prospect in the industrialization of fuel-cell. Herein, a Fe3C decorated, N doped hierarchically porous carbon, denoted as SP-N1-Z0.6/F0.5, was designed as cathodic ORR catalyst by pyrolytic carbonization, N-doping, Fe3C decoration and etching of a easily-available shaddock peel (SP) precursor. Benefitted by the synergy of N dopant and Fe3C hybriding, the typical SP-N1-Z0.6/F0.5 catalyst demonstrated ORR peak potential of 0.874 V and peak current density of −2.60 mA cm−2 for alkali ORR. In addition, the ORR catalytic activity hardly changed undergoes 5000 cycles of linear sweep voltammetries (LSVs), and fine methanol tolerance could also be ensured. All of these metrics are superior to the benchmark Pt/C catalyst, showing the potential of Fe3C incorporate and N doped carbonaceous catalyst in alkali ORR.



中文翻译:

Fe3C 修饰的 N 掺杂多孔碳作为氧还原反应的经济高效催化剂,Fe3C 修饰的 N 掺杂多孔碳作为氧还原反应的经济高效催化剂

阴极对碱氧还原反应(ORR)的催化活性、稳定性和甲醇耐受性是决定甲醇燃料电池实际性能的关键指标。杂元素掺杂和客体催化组分杂化的碳质材料是提高上述ORR指标并同时降低成本的有希望的方法,因此在燃料电池的产业化中具有广阔的前景。在此,通过热解碳化、 N掺杂、Fe 3设计了一种 Fe 3 C 修饰、N 掺杂的分级多孔碳,记为 SP-N 1 -Z 0.6 /F 0.5,作为阴极 ORR 催化剂。C 装饰和蚀刻容易获得的柚子皮 (SP) 前体。受益于N掺杂剂和Fe 3 C杂化的协同作用,典型的SP-N 1 -Z 0.6 /F 0.5催化剂表现出0.874 V的ORR峰值电位和-2.60 mA cm -2的碱性ORR峰值电流密度。此外,经过 5000 次线性扫描伏安法 (LSV) 循环,ORR 催化活性几乎没有变化,还可以确保良好的甲醇耐受性。所有这些指标都优于基准 Pt/C 催化剂,显示了 Fe 3 C 掺入和 N 掺杂碳质催化剂在碱性 ORR 中的潜力。

,

阴极对碱氧还原反应(ORR)的催化活性、稳定性和甲醇耐受性是决定甲醇燃料电池实际性能的关键指标。杂元素掺杂和客体催化组分杂化的碳质材料是提高上述ORR指标并同时降低成本的有希望的方法,因此在燃料电池的产业化中具有广阔的前景。在此,通过热解碳化、 N掺杂、Fe 3设计了一种 Fe 3 C 修饰、N 掺杂的分级多孔碳,记为 SP-N 1 -Z 0.6 /F 0.5,作为阴极 ORR 催化剂。C 装饰和蚀刻容易获得的柚子皮 (SP) 前体。受益于N掺杂剂和Fe 3 C杂化的协同作用,典型的SP-N 1 -Z 0.6 /F 0.5催化剂表现出0.874 V的ORR峰值电位和-2.60 mA cm -2的碱性ORR峰值电流密度。此外,经过 5000 次线性扫描伏安法 (LSV) 循环,ORR 催化活性几乎没有变化,还可以确保良好的甲醇耐受性。所有这些指标都优于基准 Pt/C 催化剂,显示了 Fe 3 C 掺入和 N 掺杂碳质催化剂在碱性 ORR 中的潜力。

更新日期:2022-11-03
down
wechat
bug