Water splitting has been regarded as one of the most favorable practices in sustainable energy production technologies. Metal organic frameworks (MOFs) have been recognized as potent candidates as electrocatalysts due to their high porosity, faster charge transfer, tunable structure, and large surface area. MOFs with electrically conductive 2D MXene nanosheets can significantly result in enhanced electrocatalytic activity for both the OER and HER. In this work, cobalt aminoterephthalic acid MOF (CoNH₂BDC) was combined with vanadium carbide (V₂C) MXene via a one-step solvothermal reaction strategy. Credit goes to the high porosity and large surface area of CoNH₂BDC; high electrical conductivity and hydrophilicity of V₂C for enhanced electrocatalytic activity of CoNH₂BDC/V₂C, and faster charge transfer across the CoNH₂BDC-V₂C interface. Among the series of catalysts with varying ratios of V₂C and MOF, the catalyst that showed best OER and HER activity in alkaline medium was CoNBDC/VC3, it attained a current density of 10 mA cm^–2 at 145 mV for OER and 102 mV Vs. RHE for HER, and a Tafel slope value of 50 mV/dec for OER and 55 mV/dec for HER. We believe that this work is demonstration of highly efficient electrocatalytic performance and construction of such hybrid materials can pave new pathways with regard to developing efficient electrocatalysts for green energy production.

中文翻译：

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分层碳化钒 MXene 负载的二维 （2D） CoNH2BDC MOF 杂化物，用于增强水分解


水分解一直被认为是可持续能源生产技术中最有利的做法之一。金属有机框架 （MOF） 因其高孔隙率、更快的电荷转移、可调结构和大表面积而被认为是电催化剂的有效候选者。具有导电 2D MXene 纳米片的 MOF 可以显着增强 OER 和 HER 的电催化活性。在本工作中，通过一步溶剂热反应策略将钴酰胺烯二甲酸 MOF （CoNH₂BDC） 与碳化钒 （V₂C） MXene 结合。这要归功于 CoNH₂BDC 的高孔隙率和大表面积;V₂C 的高导电性和亲水性可增强 CoNH₂BDC/V₂C 的电催化活性，并在 CoNH₂BDC-V₂C 界面上更快地转移电荷。在具有不同 V₂C 和 MOF 比例的系列催化剂中，在碱性介质中表现出最佳 OER 和 HER 活性的催化剂是 CoNBDC/VC3，它在 145 mV 和 102 mV Vs. RHE 下达到 10 mA cm^–2 的电流密度，OER 的塔菲尔斜率值为 50 mV/dec，HER 的塔菲尔斜率值为 55 mV/dec。我们相信这项工作证明了高效电催化性能，这种混合材料的构建可以为开发用于绿色能源生产的高效电催化剂铺平新的道路。