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Construction of self-supporting bimetallic sulfide arrays as a highly efficient electrocatalyst for bifunctional electro-oxidation
Inorganic Chemistry Frontiers ( IF 6.1 ) Pub Date : 2021-09-02 , DOI: 10.1039/d1qi00640a Wenjun Liu 1 , Liming Dai 2 , Yiming Hu 1 , Ku Jiang 1 , Qian Li 1 , Yilin Deng 1 , Junjie Yuan 1 , Jian Bao 1 , Yucheng Lei 1
Inorganic Chemistry Frontiers ( IF 6.1 ) Pub Date : 2021-09-02 , DOI: 10.1039/d1qi00640a Wenjun Liu 1 , Liming Dai 2 , Yiming Hu 1 , Ku Jiang 1 , Qian Li 1 , Yilin Deng 1 , Junjie Yuan 1 , Jian Bao 1 , Yucheng Lei 1
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Hydrogen production by water splitting is considered to be a feasible and energy-conserving way to develop renewable energy. Compared with water electrolysis which involves oxygen/hydrogen evolution reaction (OER/HER), the introduction of urea not only improves the energy conversion efficiency of water electrolysis but also involves the urea-rich wastewater treatment. In this work, a promising and novel bifunctional electrocatalytic material, bimetal nickel–cobalt sulfide nanosheet arrays on Ni Foam (NCS/NF), is developed as an electrocatalyst for water splitting. Benefiting from the sulfuration effect, which facilitates the formation of the high-valence states of Ni and Co during the oxidation process, the NCS/NF demonstrates a low potential of 1.46 V for the OER and 1.31 V for the UOR at 10 mA cm−2. When utilized in a water-splitting system with urea, the voltage is further reduced to 1.397 V at 10 mA cm−2. The result lays the foundation for exploring the feasibility of low energy-intensive and large-scale hydrogen production in the future.
中文翻译：
自支撑双金属硫化物阵列的构建作为双功能电氧化的高效电催化剂
水分解制氢被认为是发展可再生能源的一种可行且节能的方式。与涉及氧/氢析出反应（OER/HER）的水电解相比，尿素的引入不仅提高了水电解的能量转换效率，还涉及富尿素废水处理。在这项工作中，开发了一种有前途的新型双功能电催化材料，镍泡沫上的双金属镍-钴硫化物纳米片阵列（NCS/NF），作为水分解的电催化剂。从硫化效果，这有利于在氧化过程中Ni和Co的高价态的形成中获益，所述NCS / NF演示在10mA厘米1.46 V输出用于OER和1.31 V输出用于UOR的低电位- 2. 当与尿素水分解系统中使用，该电压被进一步降低至1.397 V在10mA厘米-2。该结果为探索未来低能耗、规模化制氢的可行性奠定了基础。
更新日期：2021-09-02
中文翻译：
自支撑双金属硫化物阵列的构建作为双功能电氧化的高效电催化剂
水分解制氢被认为是发展可再生能源的一种可行且节能的方式。与涉及氧/氢析出反应（OER/HER）的水电解相比，尿素的引入不仅提高了水电解的能量转换效率，还涉及富尿素废水处理。在这项工作中，开发了一种有前途的新型双功能电催化材料，镍泡沫上的双金属镍-钴硫化物纳米片阵列（NCS/NF），作为水分解的电催化剂。从硫化效果，这有利于在氧化过程中Ni和Co的高价态的形成中获益，所述NCS / NF演示在10mA厘米1.46 V输出用于OER和1.31 V输出用于UOR的低电位- 2. 当与尿素水分解系统中使用，该电压被进一步降低至1.397 V在10mA厘米-2。该结果为探索未来低能耗、规模化制氢的可行性奠定了基础。
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