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Facile synthesis of bimetallic-based CoMoO4/MoO2/CoP oxidized/phosphide nanorod arrays electroplated with FeOOH for efficient overall seawater splitting
CrystEngComm ( IF 2.6 ) Pub Date : 2021-08-21 , DOI: 10.1039/d1ce00748c
Ping Yang 1 , Congcong Jin 1 , Menglei Ren 1 , Honglong Xing 1 , Jianjun Shi 1
Affiliation  

A hierarchical rod-array structure Mo and Co-based oxidized/phosphide electroplated with FeOOH (NF@P-S450@FeOOH) composites on Ni foam (NF) was prepared via facile hydrothermal and electrodeposition methods. The as-synthesized rod-arrays exhibited excellent electrocatalytic performance and favorable stability for the oxygen evolution reaction (OER) under an alkaline atmosphere (overpotential of 240.5 mV under 100 mA cm−2). After doping P into Mo and Co-based oxidized (S450) nanorods, excellent composites were developed for the hydrogen evolution reaction (HER) with an overpotential of 162.8 mV under 100 mA cm−2. Thus, an asymmetric setup composed of Mo and Co-based oxidized/phosphide (P-S450) nanorods and P-S450@FeOOH electrodes were constructed for overall seawater splitting, which delivered a potential of 1.828 V at 300 mA cm−2 in alkaline simulated seawater (1 M KOH + 0.5 M NaCl). This work may provide a new method for overall seawater splitting using the reasonable design and synthesis of non-noble metal composites.

中文翻译:

轻松合成基于双金属的 CoMoO4/MoO2/CoP 氧化/磷化物纳米棒阵列,用 FeOOH 电镀以实现高效的整体海水分解

通过简便的水热和电沉积方法制备了在泡沫镍 (NF) 上电镀 FeOOH (NF@P-S450@FeOOH) 复合材料的分层棒阵列结构 Mo 和 Co 基氧化/磷化物。合成的棒阵列在碱性气氛下(100 mA cm -2下的过电位为240.5 mV)对析氧反应(OER)表现出优异的电催化性能和良好的稳定性。在将 P 掺杂到 Mo 和 Co 基氧化 (S450) 纳米棒中后,开发了用于析氢反应 (HER) 的优异复合材料,在 100 mA cm -2下的过电位为 162.8 mV. 因此,构建了由 Mo 和 Co 基氧化/磷化物 (P-S450) 纳米棒和 P-S450@FeOOH 电极组成的不对称装置用于整体海水分裂,在碱性溶液中在 300 mA cm -2下提供 1.828 V 的电位。模拟海水(1 M KOH + 0.5 M NaCl)。该工作可能为利用非贵金属复合材料的合理设计和合成提供海水整体分解的新方法。
更新日期:2021-09-14
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