Electrochemical water splitting is a critical technology for various energy storage and conversion devices, but it is greatly restricted by the sluggish kinetics of the oxygen evolution reaction (OER). Herein, an effective electrocatalyst of boron‐ and iron‐incorporated α‐Co(OH)₂ (B‐α‐Co_5.8Fe LDH)ultrathin nanosheets was synthesized for the OER by using sodium tetraphenylborate (NaTPB) as a mild alkali and boron source in ethylene glycol/water system (EG‐W). Benefiting from the large accessible surface area (563 m² g⁻¹) and the synergistic effect of Co−Fe−B,the catalyst (B‐α‐Co_5.8Fe LDH) exhibits improved activity and stability in 1 M KOH solution with a low overpotential (264 mV at 10 mA cm⁻²) and Tafel slope (34 mV dec⁻¹). In addition, this method was also applied to fabricate boron‐ and iron‐incorporated α‐Ni(OH)₂. This study should inspire a new pathway to design highly efficient OER catalysts.

中文翻译：

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硼和铁结合的α-Co（OH）2超薄纳米片作为高效的析氧催化剂

电化学水分解是用于各种能量存储和转换设备的一项关键技术，但是它受制氧反应（OER）缓慢的动力学的极大限制。本文以四苯硼酸钠（NaTPB）为弱碱和硼源，合成了硼和铁结合的α-Co（OH）₂（B-α- _Co5.8 Fe LDH）ultrathin纳米片的有效电催化剂。在乙二醇/水系统（EG‐W）中。得益于较大的可及表面积（563 m ²  g ^-1）和Co-Fe-B的协同效应，该催化剂（B-α- _Co5.8 Fe LDH）在1 M KOH溶液中具有较高的活性和稳定性。低过电位（264 mA在10 mA cm ^-2时）和Tafel斜率（34 mV dec ^-1）。此外，该方法还用于制造硼和铁结合的α-Ni（OH）₂。这项研究应为设计高效的OER催化剂开辟一条新途径。