Efficient exfoliation method of sodium-ruthenium composites for acid water oxidation

Efficient exfoliation method of sodium-ruthenium composites for acid water oxidation
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用于酸性水氧化的钠钌复合材料的高效剥离方法

DOI:
10.1007/s42114-022-00521-3
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发表时间:
2022-07
影响因子:
20.1
通讯作者:
Ming Lei
Ming Lei
中科院分区:
材料科学1区
文献类型:
--
作者:
Xuchao Pan;Wei Du;Xiaotong Zhao;Geng Chang;Zebi Zhao;Chunlei Li;Ming Lei

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水是突出重点,因为它是唯一可用的氢源标记为无化石。在各种常用的制氢技术中,电化学制氢技术占据主导地位,但其制氢量仅占全球制氢量的4%。然而,促进析氧反应(OER)的催化剂的高成本和低效率是导致产率相对较低的主要原因。在这里,我们构建了RuO2纳米片(NRO NS)的剥离层状RuO2插入钠纳米粒子(NRO NPs)。为了优化贵金属的催化性能,改变原子排列方式是一种有效的途径。NRO NS对OER表现出上级电催化活性,在酸性电解质中激发10和100 mA cm− 2的电流密度时,其过电位为220和330 mV。在1.45 V vs.RHE(可逆氢电极)下运行20 h后,NRO NS催化剂未显示出明显的失活或分解,表明可以实现NRO NS的高稳定性,同时保持OER的高活性。这项工作为设计优良的电催化剂和块体材料的二维化提供了新的视角。图形摘要
Water is highlighted focused because it is the only available source of hydrogen marked as fossil free. Among all the frequently used techniques, electrochemically splitting water possesses the predominant position, while it only accounts for 4% of globally producing hydrogen. However, the high cost and low efficiency of catalysts promoting the oxygen evolution reaction (OER) are main reasons causing the relatively low production rate. Here, we constructed RuO2nanosheets (NRO NSs) by the exfoliation of layered RuO2intercalated with sodium nanoparticles (NRO NPs). To optimize the catalytic properties of noble metals, turning atom arrangement can be a way to reach the aim. NRO NSs exhibit superior electrocatalytic activity toward OER with a low overpotential of 220 and 330 mV to stimulate the current densities of 10 and 100 mA cm−2in acidic electrolyte. After running for 20 h at 1.45 V vs. RHE (reversible hydrogen electrode), NRO NSs catalyst does not show obvious deactivation or decomposition, demonstrating that high stability for NRO NSs can be achieved while retaining high activity for OER. This work offers a new perspective for designing admirable electrocatalysts and the two-dimensionalization of bulk materials.Graphical abstract
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