Ultralong needle-like N-doped Co(OH)F on carbon fiber paper with abundant oxygen vacancies as an efficient oxygen evolution reaction catalyst†,Materials Chemistry Frontiers

当前位置： X-MOL 学术 › Mater. Chem. Front. › 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.)

Ultralong needle-like N-doped Co(OH)F on carbon fiber paper with abundant oxygen vacancies as an efficient oxygen evolution reaction catalyst†
Materials Chemistry Frontiers ( IF 6.0 ) Pub Date : 2018-09-10 00:00:00 , DOI: 10.1039/c8qm00405f
Jiaqi Lv _{1,

2,

3,

4,

5} , Xiaoxuan Yang _{1,

2,

3,

4,

5} , Hong-Ying Zang _{1,

2,

3,

4,

5} , Yong-Hui Wang _{1,

2,

3,

4,

5} , Yang-Guang Li _{1,

2,

3,

4,

5}

Affiliation

Although significant efforts have been devoted to designing efficient electrocatalysts for the oxygen evolution reaction, further progress is still needed regarding modulating the microstructures of electrocatalysts to further improve catalytic activity. Herein, utilizing ionic compound NaF and heteroatom-N-rich urea as morphology directing reagents, ultralong needle-like N-doped Co(OH)F supported on carbon fiber paper has been synthesized through a one-step hydrothermal method. Specifically, the hydrothermal kettle provides a stable environment for the formation of ultra-long needle-like structures. Meanwhile, with the addition of halogen anion F⁻ and heteroatom N, a wealth of oxygen vacancies are obtained, and the OER activity is enhanced. The as-prepared N-doped Co(OH)F-CFP (N:Co(OH)F-CFP) has excellent hydrophilicity, which facilitates its contact with the electrolyte and then accelerates the passing of electrons back and forth between the surface of the material and the electrolyte. Under alkaline conditions, N:Co(OH)F-CFP's OER activity is superior to that of IrO₂. Its potential can reach 1.540 V (vs. RHE) at 10 mA cm⁻² with a Tafel slope of 69.75 mV dec⁻¹ in 1 M KOH solution.

中文翻译：

碳纤维纸上的超长针状N掺杂Co（OH）F，具有丰富的氧空位，是一种有效的析氧反应催化剂†

尽管已经投入大量努力来设计用于氧释放反应的有效电催化剂，但是在调节电催化剂的微结构以进一步提高催化活性方面仍需要进一步的发展。在此，利用离子化合物NaF和富含杂原子-N的尿素作为形态学指导剂，通过一步水热法合成了碳纤维纸上负载的超长针状N掺杂Co（OH）F。具体地说，水热釜为形成超长的针状结构提供了稳定的环境。同时，随着加入的卤素阴离子˚F ^-和杂原子N，获得了大量的氧空位，并且增强了OER活性。所制备的N掺杂的Co（OH）F-CFP（N：Co（OH）F-CFP）具有优异的亲水性，这有助于其与电解质接触，然后加速电子在表面之间来回传递。材料和电解质。在碱性条件下，N：Co（OH）F-CFP的OER活性优于IrO ₂。在1 M KOH溶液中，其电势在10 mA cm ^-2时可达到1.540 V（相对于RHE），Tafel斜率为69.75 mV dec ^-1。

更新日期：2018-09-10

点击分享查看原文

点击收藏

阅读更多本刊最新论文