An Amorphous Cobalt Borate Nanosheet-Coated Cobalt Boride Hybrid for Highly Efficient Alkaline Water Oxidation Reaction,ACS Sustainable Chemistry & Engineering

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An Amorphous Cobalt Borate Nanosheet-Coated Cobalt Boride Hybrid for Highly Efficient Alkaline Water Oxidation Reaction
ACS Sustainable Chemistry & Engineering ( IF 7.1 ) Pub Date : 2019-02-20 00:00:00 , DOI: 10.1021/acssuschemeng.9b00258
Tan Tan ₁ , Pengyu Han ₁ , Hengjiang Cong ₁ , Gongzhen Cheng ₁ , Wei Luo ₁

Affiliation

We present a simple in situ sodium borohydride (NaBH₄) reduction approach to produce amorphous core–shell like cobalt borate nanosheet-coated cobalt boride hybrid ([email protected]). Benefiting from the unique rich amorphous Co-Bi layer, it exhibits extraordinary catalytic activity and good stability toward the oxygen evolution reaction (OER) in 1.0 M KOH, with an overpotential of 291 mV to obtain a current density of 10 mA cm^–2, outperforming most of the documented metal–metalloid-based electrocatalysts. This reverse addition strategy might provide a promising pathway for designing various transition metal borate and boride hybrid for more applications.

中文翻译：

用于高效碱性水氧化反应的无定形硼酸硼纳米片包覆的硼化钴杂化物

我们提出一种简单的原位硼氢化钠（NaBH ₄）还原方法，以产生无定形核-壳，如硼酸钴纳米片涂层的硼化钴杂化物（[受电子邮件保护]）。得益于独特的丰富无定形Co-Bi层，它在1.0 M KOH中表现出非凡的催化活性和对氧释放反应（OER）的良好稳定性，超电势为291 mV，可获得10 mA cm ^–2的电流密度，胜过大多数已记录的金属-类金属基电催化剂。这种反向添加策略可能为设计用于更多应用的各种过渡金属硼酸盐和硼化物杂化物提供有希望的途径。

更新日期：2019-02-20

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