CoP and Ni2P implanted in a hollow porous N-doped carbon polyhedron for pH universal hydrogen evolution reaction and alkaline overall water splitting,Nanoscale

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CoP and Ni2P implanted in a hollow porous N-doped carbon polyhedron for pH universal hydrogen evolution reaction and alkaline overall water splitting
Nanoscale ( IF 5.8 ) Pub Date : 2020-11-11 , DOI: 10.1039/d0nr07126a
Run Zhang _{1,

2,

3,

4,

5} , Ruolin Zhu _{1,

2,

3,

4,

5} , Ye Li _{1,

2,

3,

4,

5} , Zhi Hui _{1,

2,

3,

4,

5} , Yuyan Song _{1,

2,

3,

4,

5} , Yongliang Cheng _{1,

2,

3,

4,

5} , Jinjun Lu _{1,

2,

3,

4,

5}

Affiliation

Developing low-cost and highly active bifunctional electrocatalysts for water splitting is very important but still remains a challenge. Herein, a novel bifunctional electrocatalyst composed of CoP and Ni₂P nanoparticles implanted in a hollow porous N-doped carbon polyhedron (CoP/Ni₂P@HPNCP) is synthesized by carbonization of Co/Ni-layered double hydroxide@zeolitic imidazolate framework-67 (Co/Ni-LDH@ZIF-67) followed by an oxidation and phosphorization strategy. The introduction of LDH can not only promote the formation of a hollow porous structure to supply more active sites, but also generate the CoP/Ni₂P nanoheterostructure to afford extra active sites and modulate the electronic structure of the catalyst. As a result, CoP/Ni₂P@HPNCP exhibits excellent pH universal hydrogen evolution reaction activity and alkaline oxygen evolution reaction activity. Furthermore, the electrolytic cell assembled from bifunctional CoP/Ni₂P@HPNCP requires a cell voltage of 1.59 V in 1.0 M KOH at 10 mA cm⁻², revealing its potential as a high performance bifunctional electrocatalyst.

中文翻译：

将CoP和Ni2P注入空心多孔的N掺杂碳多面体中以实现pH值普遍的氢气析出反应和碱性总水分解

开发用于水分解的低成本和高活性双功能电催化剂非常重要，但仍然是一个挑战。在此，通过将Co / Ni层状双氢氧化物@沸石咪唑化物骨架碳化，合成了一种新型的由CoP和Ni ₂ P纳米粒子组成的新型双功能电催化剂，该纳米粒子被植入空心的N掺杂碳多面体中（CoP / Ni ₂ P @ HPNCP）。 67（Co / Ni-LDH @ ZIF-67），然后进行氧化和磷化策略。LDH的引入不仅可以促进中空多孔结构的形成以提供更多的活性位点，而且可以产生CoP / Ni ₂ P纳米异质结构以提供额外的活性位点并调节催化剂的电子结构。结果，CoP / Ni ₂P @ HPNCP表现出优异的pH值普遍氢释放反应活性和碱性氧释放反应活性。此外，由双功能CoP / Ni ₂ P @ HPNCP组装而成的电解池需要在1.0 M KOH中，在10 mA cm ^-2下的电池电压为1.59 V ，这显示出其作为高性能双功能电催化剂的潜力。

更新日期：2020-11-25

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