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Co, Mn co-doped Fe9S11@Ni9S8 supported on nickel foam as a high efficiency electrocatalyst for the oxygen evolution reaction and urea oxidation reaction
Dalton Transactions ( IF 3.5 ) Pub Date : 2022-06-15 , DOI: 10.1039/d2dt01200f Jiaxin Li 1 , Lixin Zhang 1 , Xiaoqiang Du 1 , Xiaoshuang Zhang 2
Dalton Transactions ( IF 3.5 ) Pub Date : 2022-06-15 , DOI: 10.1039/d2dt01200f Jiaxin Li 1 , Lixin Zhang 1 , Xiaoqiang Du 1 , Xiaoshuang Zhang 2
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The Earth's fossil resources will be exhausted soon, so it is urgent to find clean and efficient new energy for replacing fossil resources. Hydrogen energy is gradually attracting the attention of the public and electrolysis of water is considered to be one of the important means of hydrogen production because of its simplicity and convenience. In this paper, a hydrothermal method for the synthesis of a Co and Mn co-doped bimetallic sulfide Fe9S11@Ni9S8 electrocatalyst is proposed for the first time. The prepared Co-Mn-Fe9S11@Ni9S8/NF electrocatalyst exhibits excellent electrocatalytic activity for the oxygen evolution reaction (OER) and urea oxidation reaction (UOR). It can provide a current density of 10 mA cm−2 with only 193 mV overpotential for the OER and a current density of 10 mA cm−2 with only 1.33 V potential for the UOR, which are far superior to those of most reported electrocatalysts. What is noteworthy is that the unique nanoflower structure of Co-Mn-Fe9S11@Ni9S8/NF increases the specific surface area of the material and the introduction of Co and Mn ions promotes the formation of high valence state Ni and Fe and enhances the charge transfer rate. The density functional theory (DFT) calculation shows that the in situ generated Co-Mn-Fe-NiOOH material derived from Co-Mn-Fe9S11@Ni9S8 exhibits the best water adsorption energy and the best electrical conductivity, thus improving the catalytic performance of the material. This work provided a new idea for the development of bimetallic cation doped electrocatalysts with high efficiency and low cost.
中文翻译：
泡沫镍负载Co、Mn共掺杂Fe9S11@Ni9S8作为析氧反应和尿素氧化反应的高效电催化剂
地球化石资源即将枯竭，寻找清洁高效的新能源替代化石资源迫在眉睫。氢能正逐渐受到公众的关注，电解水因其简单方便被认为是制氢的重要手段之一。本文首次提出了水热法合成Co和Mn共掺杂双金属硫化物Fe 9 S 11 @Ni 9 S 8电催化剂。制备的Co-Mn-Fe 9 S 11 @Ni 9 S 8/NF电催化剂对析氧反应（OER）和尿素氧化反应（UOR）表现出优异的电催化活性。它可以提供 10 mA cm -2的电流密度和仅 193 mV 的 OER 过电位，以及 10 mA cm -2的电流密度和仅 1.33 V 的 UOR 电位，这远远优于大多数报道的电催化剂。值得注意的是Co-Mn-Fe 9 S 11 @Ni 9 S 8独特的纳米花结构/NF增加了材料的比表面积，Co和Mn离子的引入促进了高价态Ni和Fe的形成，提高了电荷转移率。密度泛函理论（DFT）计算表明，由Co-Mn-Fe 9 S 11 @Ni 9 S 8原位生成的Co-Mn-Fe-NiOOH材料表现出最好的吸水能和最好的电导率，因此提高材料的催化性能。该工作为开发高效、低成本的双金属阳离子掺杂电催化剂提供了新思路。
更新日期：2022-06-15
中文翻译：
泡沫镍负载Co、Mn共掺杂Fe9S11@Ni9S8作为析氧反应和尿素氧化反应的高效电催化剂
地球化石资源即将枯竭，寻找清洁高效的新能源替代化石资源迫在眉睫。氢能正逐渐受到公众的关注，电解水因其简单方便被认为是制氢的重要手段之一。本文首次提出了水热法合成Co和Mn共掺杂双金属硫化物Fe 9 S 11 @Ni 9 S 8电催化剂。制备的Co-Mn-Fe 9 S 11 @Ni 9 S 8/NF电催化剂对析氧反应（OER）和尿素氧化反应（UOR）表现出优异的电催化活性。它可以提供 10 mA cm -2的电流密度和仅 193 mV 的 OER 过电位，以及 10 mA cm -2的电流密度和仅 1.33 V 的 UOR 电位，这远远优于大多数报道的电催化剂。值得注意的是Co-Mn-Fe 9 S 11 @Ni 9 S 8独特的纳米花结构/NF增加了材料的比表面积，Co和Mn离子的引入促进了高价态Ni和Fe的形成，提高了电荷转移率。密度泛函理论（DFT）计算表明，由Co-Mn-Fe 9 S 11 @Ni 9 S 8原位生成的Co-Mn-Fe-NiOOH材料表现出最好的吸水能和最好的电导率，因此提高材料的催化性能。该工作为开发高效、低成本的双金属阳离子掺杂电催化剂提供了新思路。
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