In situ growth of CoP nanoparticles anchored on (N,P) co-doped porous carbon engineered by MOFs as advanced bifunctional oxygen catalyst for rechargeable Zn–air battery,Journal of Materials Chemistry A

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

In situ growth of CoP nanoparticles anchored on (N,P) co-doped porous carbon engineered by MOFs as advanced bifunctional oxygen catalyst for rechargeable Zn–air battery
Journal of Materials Chemistry A ( IF 10.7 ) Pub Date : 2020-08-28 , DOI: 10.1039/d0ta06435a
Yongxia Wang _{1,

2,

3,

4,

5} , Mingjie Wu _{6,

7,

8} , Jun Li _{1,

2,

3,

4,

5} , Haitao Huang _{5,

9,

10,

11} , Jinli Qiao _{1,

2,

3,

4,

5}

Affiliation

Screening and constructing low cost, highly efficient and robust electrocatalysts with high oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) activity is crucial for rechargeable metal–air batteries. Metal phosphides coupled with heteroatom doped carbon are promising candidates for oxygen electrodes. In this work, we demonstrate a facile strategy to synthesize cobalt phosphide anchored heteroatom (N,P) co-doped porous carbon (CoP/NP-HPC) through a one-step pyrolysis of bimetal–organic frameworks with a simple in situ phosphorization process. In alkaline solution, the obtained CoP/NP-HPC catalyst exhibits high bifunctional catalytic activity toward ORR and OER, comparable to commercial 20% Pt/C or even better, which is attributed to the synergistic effect between the CoP active sites and N,P co-doped carbon, and the porous framework as a channel benefiting the diffusion of reaction species. Notably, a rechargeable Zn–air battery with CoP/NP-HPC as the cathode electrocatalyst delivers a high power density of 186 mW cm⁻², as well as good long-term charge/discharge cyclic stability, outperforming 20% Pt/C. The hybrid catalyst of CoP anchored heteroatom doped carbon provides a possibility and an opportunity to promote the development of low-cost and highly efficient bifunctional catalysts for ORR and OER in applications of metal–air batteries.

中文翻译：

由MOF设计的锚固在（N，P）共掺杂多孔碳上的CoP纳米颗粒的原位生长，作为可充电锌空气电池的高级双功能氧催化剂

筛选和构建具有高氧还原反应（ORR）和氧释放反应（OER）活性的低成本，高效且坚固的电催化剂对于可充电金属空气电池至关重要。金属磷化物与杂原子掺杂的碳偶联是氧电极的有希望的候选物。在这项工作中，我们展示了一种通过简单的原位双金属-有机骨架一步热解合成磷化钴锚定杂原子（N，P）共掺杂多孔碳（CoP / NP-HPC）的简便策略。磷化过程。在碱性溶液中，所得的CoP / NP-HPC催化剂对ORR和OER具有较高的双功能催化活性，相当于市售的20％Pt / C甚至更好，这归因于CoP活性位与N，P的协同作用。共掺杂碳，多孔骨架作为通道，有利于反应物种的扩散。值得注意的是，以CoP / NP-HPC作为阴极电催化剂的可充电Zn-空气电池可提供186 mW cm ^-2的高功率密度以及良好的长期充放电循环稳定性，优于20％Pt / C。CoP锚定杂原子掺杂碳的杂化催化剂为金属-空气电池应用中ORR和OER的低成本，高效双功能催化剂的开发提供了可能性和机遇。

更新日期：2020-09-22

点击分享查看原文

点击收藏

阅读更多本刊最新论文本刊介绍/投稿指南11