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High‐Entropy Metal Sulfide Nanoparticles Promise High‐Performance Oxygen Evolution Reaction
Advanced Energy Materials ( IF 24.4 ) Pub Date : 2020-11-30 , DOI: 10.1002/aenm.202002887 Mingjin Cui 1 , Chunpeng Yang 1 , Boyang Li 2 , Qi Dong 1 , Meiling Wu 1 , Sooyeon Hwang 3 , Hua Xie 1 , Xizheng Wang 1 , Guofeng Wang 2 , Liangbing Hu 1
Advanced Energy Materials ( IF 24.4 ) Pub Date : 2020-11-30 , DOI: 10.1002/aenm.202002887 Mingjin Cui 1 , Chunpeng Yang 1 , Boyang Li 2 , Qi Dong 1 , Meiling Wu 1 , Sooyeon Hwang 3 , Hua Xie 1 , Xizheng Wang 1 , Guofeng Wang 2 , Liangbing Hu 1
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Transition metal sulfides with a multi‐elemental nature represent a class of promising catalysts for oxygen evolution reaction (OER) owing to their good catalytic activity. However, their synthesis remains a challenge due to the thermodynamic immiscibility of the constituent multimetallic elements in a sulfide structure. Herein, for the first time the synthesis of high‐entropy metal sulfide (HEMS, i.e., (CrMnFeCoNi)Sx) solid solution nanoparticles is reported. Computational and X‐ray photoelectron spectroscopy analysis suggest that the (CrMnFeCoNi)Sx exhibits a synergistic effect among metal atoms that leads to desired electronic states to enhance OER activity. The (CrMnFeCoNi)Sx nanoparticles show one of the best activities (low overpotential 295 mV at 100 mA cm−2 in 1 m KOH solution) and good durability (only slight polarization after 10 h by chronopotentiometry) compared with their unary, binary, ternary, and quaternary sulfide counterparts. This work opens up a new synthesis paradigm for high‐entropy compound nanoparticles for highly efficient electrocatalysis applications.
中文翻译：
高熵金属硫化物纳米粒子可实现高性能的放氧反应
由于具有良好的催化活性，具有多元素性质的过渡金属硫化物代表了一类有前途的氧释放反应催化剂（OER）。但是，由于硫化物结构中多金属元素的热力学不相容性，它们的合成仍然是一个挑战。在此，首次报道了高熵金属硫化物（HEMS，即（CrMnFeCoNi）S x）固溶体纳米颗粒的合成。计算和X射线光电子能谱分析表明（CrMnFeCoNi）S x在金属原子之间表现出协同效应，从而导致所需的电子态增强OER活性。（CrMnFeCoNi）S x纳米颗粒显示（低超电势295毫伏在100mA厘米最好活动之一-2 1米KOH溶液）和良好的耐久性（由计时10小时后只有轻微的偏光）与他们的一元，二元，三元，和四元硫化物同行相比。这项工作为高熵化合物纳米颗粒的高效电催化应用开辟了新的合成范式。
更新日期：2021-01-20
中文翻译：
高熵金属硫化物纳米粒子可实现高性能的放氧反应
由于具有良好的催化活性，具有多元素性质的过渡金属硫化物代表了一类有前途的氧释放反应催化剂（OER）。但是，由于硫化物结构中多金属元素的热力学不相容性，它们的合成仍然是一个挑战。在此，首次报道了高熵金属硫化物（HEMS，即（CrMnFeCoNi）S x）固溶体纳米颗粒的合成。计算和X射线光电子能谱分析表明（CrMnFeCoNi）S x在金属原子之间表现出协同效应，从而导致所需的电子态增强OER活性。（CrMnFeCoNi）S x纳米颗粒显示（低超电势295毫伏在100mA厘米最好活动之一-2 1米KOH溶液）和良好的耐久性（由计时10小时后只有轻微的偏光）与他们的一元，二元，三元，和四元硫化物同行相比。这项工作为高熵化合物纳米颗粒的高效电催化应用开辟了新的合成范式。
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