Two-Dimensional NiIr@N-Doped Carbon Nanocomposites Supported on Ni Foam for Electrocatalytic Overall Water Splitting.,Chemistry - A European Journal

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Two-Dimensional NiIr@N-Doped Carbon Nanocomposites Supported on Ni Foam for Electrocatalytic Overall Water Splitting.
Chemistry - A European Journal ( IF 3.9 ) Pub Date : 2020-08-25 , DOI: 10.1002/chem.202003473
You Xu ₁ , Xingjie Chai ₁ , Mengying Liu ₁ , Tianlun Ren ₁ , Shanshan Yu ₁ , Ziqiang Wang ₁ , Xiaonian Li ₁ , Liang Wang ₁ , Hongjing Wang ₁

Affiliation

Electrochemical water splitting can provide a promising avenue for sustainable hydrogen production. Highly efficient electrocatalysts toward the hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) are extremely important for the practical application of water splitting technology. Herein, a one‐step annealing strategy is reported for the fabrication of a metal–organic framework‐derived bifunctional self‐supported electrocatalyst, which is composed of two‐dimensional N‐doped carbon‐wrapped Ir‐doped Ni nanoparticle composites supported on Ni foam (NiIr@N‐C/NF). The resultant NiIr@N‐C/NF displays excellent electrocatalytic performance in 1.0 m KOH, with low overpotentials of 32 mV at 10 mA cm⁻² for the HER and 329 mV at 50 mA cm⁻² for the OER. Particularly, the HER‐OER bifunctional NiIr@N‐C/NF needs only 1.50 V to yield 10 mA cm⁻² for overall water splitting.

中文翻译：

Ni泡沫支撑的二维NiIr @ N掺杂碳纳米复合材料用于电催化总水分解。

电化学水分解可为可持续制氢提供有希望的途径。对于制氢技术（HER）和制氧反应（OER）而言，高效的电催化剂对于水分解技术的实际应用极为重要。本文报道了一种一步退火策略，用于制备金属-有机骨架衍生的双功能自负载电催化剂，该催化剂由负载在泡沫镍上的二维N掺杂碳包裹的Ir掺杂的Ni纳米颗粒复合材料组成。（NiIr @ N‐C / NF）。所得的NiIr @ N-C / NF在1.0 m KOH中显示出优异的电催化性能，在10 mA cm ^-2时的HER和在50 mA cm ^-2时的329 mV的低过电势低对于OER。特别是，HER-OER双功能NiIr @ N-C / NF仅需1.50 V即可产生10 mA cm ^-2的总水量。

更新日期：2020-08-25

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