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首页> 外文期刊>Journal of Materials Chemistry, A. Materials for energy and sustainability >Self-standing polyaniline membrane containing quaternary ammonium groups loaded with hollow spherical NiCo(2)O(4)electrocatalyst for alkaline water electrolyser
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Self-standing polyaniline membrane containing quaternary ammonium groups loaded with hollow spherical NiCo(2)O(4)electrocatalyst for alkaline water electrolyser

机译：含有季铵基团的自站式聚苯胺膜，装有中空球形NiCO（2）O（4）电催化剂，用于碱性水电解槽

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摘要

Bi-functional electrocatalysts are expected to improve the efficiency of overall water splitting in alkaline media by the simultaneous oxygen evolution reaction (OER) and hydrogen evolution reaction (HER). We prepared a free-standing, anion-conducting and stable polyaniline (PAni) membrane, where the central secondary and two terminal tertiary amine groups act as gel inhibitors. The prepared alkaline membranes were used as substrates for loading an electrocatalyst and fabricating the membrane electrode assembly (MEA). Nickel cobaltite (NiCo2O4) is generally considered a promising candidate for the OER, but has morphology-dependent bi-functional catalytic activity for overall water splitting that prompted us to develop the hollow spherical-structured NiCo(2)O(4)for simultaneous OER and HER in alkaline media. The reported electrocatalyst achieved 10 mA cm(-2)current density at 1.63 V for the OER, and 0.24 V for the HER. The fabricated MEA showed better overall water splitting performance for the PAni-1.03 membrane in comparison with commercially available membranes, and good durability for alkaline water electrolysis at 50 degrees C under an applied current density of 200 mA cm(-2). Further, the proposed highly conducting and stable alkaline membrane electrolyser may be a turning point for efficient water splitting in alkaline media for O-2/H(2)evolution.
机译：预计双功能电催化剂将通过同时氧气进化反应（oer）和氢进化反应（她）提高碱性介质中总水分分裂的效率。我们制备了一种独立的阴离子导电和稳定的聚苯胺（Pani）膜，其中中央仲和两个末端叔胺群充当凝胶抑制剂。使用制备的碱性膜作为用于装载电催化剂并制造膜电极组件（MEA）的底物。镍钴罐（Nico2O4）通常被认为是oer的有希望的候选者，但具有用于整体水分裂的形态学的双功能催化活性，其促使我们为同时oer开发中空球形结构的nico（2）O（4）和她在碱性媒体。报告的电催化剂为oer为1.63V实现了10 mA cm（-2）电流密度，为她的0.24V。与市售膜相比，制造的MEA显示出帕尼-1.03膜的更好的整体水分裂性能，以及在施加的电流密度为200mAcm（-2）的50℃下碱性水电解的良好耐久性。此外，所提出的高导电且稳定的碱性膜电解器可以是用于O-2 / H（2）进化的碱性介质中有效水分裂的转折点。

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