氮碳纳米棒阵列支撑的CoP/CoN异质结构活性中心作为独立的高性能三功能电催化剂,Journal of Materials Chemistry A

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氮碳纳米棒阵列支撑的CoP/CoN异质结构活性中心作为独立的高性能三功能电催化剂
Journal of Materials Chemistry A ( IF 10.7 ) Pub Date : 2024-01-08 , DOI: 10.1039/d3ta06935d
Linming Bai ₁ , Dan Wang ₁ , Hongchen Shen ₂ , Wenlong Wang ₁ , Shanshan Li ₁ , Wei Yan ₁

Affiliation

开发用于氧还原反应（ORR）、析氧反应（OER）和析氢反应（HER）的高活性和长期耐用的三功能电催化剂具有至关重要的意义和要求。在这项工作中，报道了碳布催化剂上由氮碳纳米棒阵列支撑的CoP/CoN异质结构活性中心（CoP/CoN@NCNRs/CC），并可作为锌空气电池和水分解的自支撑电极。密度泛函理论计算（DFT）和实验结果均表明，良好的催化性能归因于高度分散的活性位点，其中具有ORR和OER活性的Co-N _x -C与具有OER和HER活性的CoP表现出协同作用。此外，NCNR 可以保护活性位点免受腐蚀并参与 ORR。CoP/CoN@NCNRs/CC作为液态锌空气电池的空气电极，具有较高的功率密度和能量密度，并表现出优异的稳定性，在10 mA cm -2 下具有超过420小时的长工作^寿命。全固态锌空气电池和水分解装置是自组装的，两者都具有在柔性电子和新能源设备中应用的潜力。

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CoP/CoN heterostructural active centers supported on nitrogen carbon nanorod arrays as freestanding high-performance trifunctional electrocatalysts

Developing high-activity and long-term durable trifunctional electrocatalysts for the oxygen reduction reaction (ORR), oxygen evolution reaction (OER) and hydrogen evolution reaction (HER) is of crucial significance and demanding. In this work, a CoP/CoN heterostructural active center supported by nitrogen carbon nanorod arrays on carbon cloth catalyst (CoP/CoN@NCNRs/CC) is reported and acts as a self-supported electrode for zinc–air batteries and water splitting. Both density functional theory calculation (DFT) and experimental results reveal that the favourable catalytic performance is due to the highly dispersed active sites where Co–N_x–C with ORR and OER activity and CoP with OER and HER activity exhibited a synergistic role. Furthermore, the NCNRs can protect the active sites from corrosion and participate in the ORR. CoP/CoN@NCNRs/CC as an air electrode for liquid zinc–air batteries possesses a great power density and energy density and shows superior stability with a long operating life of more than 420 h at 10 mA cm⁻². The all-solid-state Zn–air batteries and water splitting device are self-assembled and both of them have potential for application in flexible electronics and new energy devices.

更新日期：2024-01-08

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