Cu2O/Reduced Graphene Oxide Nanocomposites for Electrocatalytic Overall Water Splitting
Cu2O/Reduced Graphene Oxide Nanocomposites for Electrocatalytic Overall Water Splitting
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DOI：
10.1021/acsanm.2c04491
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发表时间：
2022-11
影响因子：
5.9
通讯作者：
Muthuchamy Nallal;K. Park;Sungkyun Park;Jaeyong Kim;Sulakshana Shenoy;Chitiphon Chuaicham;K. Sasaki;K. Sekar
中科院分区：
文献类型：
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作者：
Muthuchamy Nallal;K. Park;Sungkyun Park;Jaeyong Kim;Sulakshana Shenoy;Chitiphon Chuaicham;K. Sasaki;K. Sekar
采用可持续光氧化还原策略合成了层次化Cu2O/RGO纳米复合材料，并将其用于碱性条件下的析氧和析氢反应(OER和HER)。光氧化还原Cu2O/RGO电催化剂具有小的过电位(OER：215 mV，HER：142 mV)，动力学速度快，Tafel斜率为58.2MVdec-1，高质量性能(613.49 A g-1)，高交换电流密度(10.9 mA cm-2)，长期稳定性，与分级Cu2O相比，最大法拉第效率可达97%。与现有的基准铂碳(+)∥IrO2(−)电池相比，Cu2O/RGO-2(+)∥Cu2O/RGO-2(−)电池在整体水分离方面表现出优异的耐久性。这项研究提出了一种可持续的方法，通过整体水分解和其他催化和电催化应用来产生氢燃料。
Hierarchical Cu2O/RGO nanocomposites were synthesized via a sustainable photoredox strategy and utilized as bifunctional electrocatalysts for oxygen and hydrogen evolution reactions (OER and HER) under alkaline conditions. The photoredox Cu2O/RGO electrocatalyst has potential for bifunctional electrocatalytic applications, owing to their small overpotentials (OER: 215 mV and HER: 142 mV), fast kinetics, Tafel slope of 58.2 mV dec–1, high mass performance (613.49 A g–1), high exchange current density (10.9 mA cm–2), long-term stability, and maximum Faradaic efficiency of 97% compared with hierarchical Cu2O,in situsynthesized Cu2O/RGO-1 catalyst, and most electrocatalysts reported thus far. The Cu2O/RGO-2 (+) ∥ Cu2O/RGO-2 (−) cell exhibits excellent durability for overall water splitting compared to the existing benchmark Pt@C (+) ∥ IrO2(−) cell. This study presents a sustainable approach toward hydrogen fuel generation via overall water splitting and other catalytic and electrocatalytic applications.