Metal-Organic Framework-Derived Co2 P Nanoparticle/Multi-Doped Porous Carbon as a Trifunctional Electrocatalyst.,Advanced Materials

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Metal-Organic Framework-Derived Co2 P Nanoparticle/Multi-Doped Porous Carbon as a Trifunctional Electrocatalyst.
Advanced Materials ( IF 27.4 ) Pub Date : 2020-07-26 , DOI: 10.1002/adma.202003649
Haitao Liu ₁ , Jingyu Guan ₁ , Shaoxuan Yang ₁ , Yihuan Yu ₁ , Rong Shao ₁ , Zhengping Zhang ₁ , Meiling Dou _{1,

2} , Feng Wang _{1,

2} , Qiang Xu _{3,

4}

Affiliation

Developing efficient and low‐cost replacements for precious metals as electrocatalysts active in electrochemical reactions—the oxygen evolution reaction (OER), hydrogen evolution reaction (HER), and oxygen reduction reaction (ORR)—is a top priority in renewable energy technology. In this work a highly active and very stable trifunctional electrocatalyst composed of Co₂P embedded in Co, N, and P multi‐doped carbon has been synthesized using zeolitic imidazolate frameworks as precursors. The synergistic effects between Co₂P and the multi‐heteroatom‐doped carbon substrates afford materials having electrocatalytic activities for HER, OER, and ORR, which are comparable—or even superior to—those of commercial RuO₂ or Pt/C catalysts. Density functional theory calculations show that Co₂P has a higher density of states at the Fermi level than Co_nP (0 < n < 2), which promotes electron transfer and intermediates adsorption in the catalytic process. Zinc–air batteries and water splitting devices assembled using the materials as electrode electrocatalysts show good performance and outstanding stability. This work represents a breakthrough in improving the catalytic performance of non‐precious metal electrocatalysts for OER, HER, and ORR, and opens new avenues for clean energy generation.

中文翻译：

金属有机骨架衍生的Co2 P纳米颗粒/多掺杂多孔碳作为三功能电催化剂。

为可再生能源技术中的重中之重，开发高效，低成本的电化学反应中活跃的贵金属替代品-电催化剂-放氧反应（OER），放氢反应（HER）和氧还原反应（ORR）。在这项工作中，使用沸石咪唑酸酯骨架作为前体合成了由嵌入Co，N和P多掺杂碳中的Co ₂ P组成的高活性和非常稳定的三官能电催化剂。Co ₂ P和掺杂多杂原子的碳基质之间的协同作用使材料具有对HER，OER和ORR的电催化活性，这些材料可与甚至优于商用RuO _2。或Pt / C催化剂。密度泛函理论计算表明，Co ₂ P在费米能级上的态密度高于Co _n P（0 < n <2），这在催化过程中促进了电子转移和中间吸附。使用该材料作为电极电催化剂组装而成的锌空气电池和水分解装置显示出良好的性能和出色的稳定性。这项工作代表了在提高用于OER，HER和ORR的非贵金属电催化剂催化性能方面的突破，并为清洁能源的产生开辟了新途径。

更新日期：2020-09-08

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