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首页> 外文期刊>Journal of Materials Chemistry, A. Materials for energy and sustainability >Bifunctional CoP and CoN porous nanocatalysts derived from ZIF-67 in situ grown on nanowire photoelectrodes for efficient photoelectrochemical water splitting and CO2 reduction
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Bifunctional CoP and CoN porous nanocatalysts derived from ZIF-67 in situ grown on nanowire photoelectrodes for efficient photoelectrochemical water splitting and CO2 reduction

机译：在纳米线光电极上原位生长ZIF-67衍生的双功能CoP和CoN多孔纳米催化剂，用于有效的光电化学水分解和CO2还原

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To develop highly efficient and non-noblemetal catalysts in solar-driven photoelectrochemical cells for water splitting and CO2 reduction is a tremendous challenge but there is a strong desire to accomplish it. Herein, CoP- and CoN-based porous nanocatalysts, which were in situ transformed from Co-based zeolitic imidazolate framework (ZIF-67), are reported as efficient co-catalysts for photoelectrochemical water splitting and CO2 reduction. The CoP wrapped with N-doped carbon (CoP/CN) nano-electrocatalysts, with high catalytic activity and stability for both the hydrogen (HER) and oxygen (OER) evolution reactions in situ coated with TiO2 nanowires (TiO2 NWs@CoP/CN), and the p-type Si nanowires (Si NWs@CoP/CN) strikingly promoted photoelectrochemical water splitting by serving as a photoanode and a photocathode, respectively, whereas CoN wrapped with N-doped carbon (CoN/CN) nanocatalysts presented excellent electrocatalytic activity towards CO2 reduction with a low onset potential, high selectivity, and good stability. It can be noted that CoN/CN catalysts-covered p-type Si nanowires (Si NWs@CoN/CN) also displayed high photoelectrochemical performance for CO2 reduction. The superior photoelectrochemical catalytic properties can be ascribed to the synergetic effect of the porous N-doped carbon network inherited from ZIF-67 and wrapped CoP or CoN nanoparticles as well as the superior interface achieved via the in situ growth method.
机译：在太阳能驱动的光电化学电池中开发高效的非贵金属催化剂用于水分解和CO2还原是一项巨大的挑战，但人们强烈希望实现这一目标。在此，据报道从Co基沸石咪唑酸盐骨架（ZIF-67）原位转化的CoP基和CoN基多孔纳米催化剂是用于光电化学水分解和CO 2还原的有效助催化剂。 CoP包裹有N掺杂的碳（CoP / CN）纳米电催化剂，对原位包覆TiO2纳米线的氢（HER）和氧（OER）析出反应具有高催化活性和稳定性（TiO2 NWs @ CoP / CN ），p型Si纳米线（Si NWs @ CoP / CN）分别通过充当光阳极和光阴极来显着促进光电化学水分解，而包裹有N掺杂碳（CoN / CN）纳米催化剂的CoN表现出出色的电催化作用具有降低启动电位，高选择性和良好稳定性的二氧化碳还原活性。可以注意到，覆盖有CoN / CN催化剂的p型Si纳米线（Si NWs @ CoN / CN）也显示出高的光电化学性能以减少CO2。优异的光电化学催化性能可归因于ZIF-67和包裹的CoP或CoN纳米颗粒所继承的多孔N掺杂碳网络的协同效应，以及通过原位生长方法获得的优异界面。

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