Design and synthesis of highly efficient and cost-effective bifunctional catalysts for hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) remain a big challenge. Herein, a quaternary amorphous nanocompound Ni-Fe-P-B has been synthesized by a facile, scalable co-reduction method. The Ni-Fe-P-B exhibits high electrocatalytic activity and outstanding durability for both HER and OER, delivering a current density of 10 mAcm⁻² at overpotentials of 220 and 269 mV, respectively. When loaded on carbon fiber paper (CFP) as a bifunctional catalyst, the Ni-Fe-P-B@CFP electrode requires a low cell voltage of 1.58 V to obtain 10 mAcm⁻² for overall water splitting with negligible recession over 60 h. The excellent catalytic performances of Ni-Fe-P-B mainly benefit from the metal-metalloid combined composition modulation and the unique amorphous structure. This work provides new insights into the design of robust bifunctional catalysts for water splitting, and may promote the development of multicomponent amorphous catalysts.

中文翻译：

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Ni-Fe-PB季铵化合物中金属-类金属联合调节促进电催化水分解

设计和合成用于氢气释放反应（HER）和氧气释放反应（OER）的高效，低成本的双功能催化剂仍然是一个巨大的挑战。在此，已经通过一种容易的，可扩展的共还原方法合成了四元非晶态纳米化合物Ni-Fe-PB。Ni-Fe-PB对HER和OER均显示出高电催化活性和出色的耐久性，分别在220和269 mV的过电势下提供10 mAcm ^-2的电流密度。当将Ni-Fe-PB @ CFP电极作为双功能催化剂负载在碳纤维纸（CFP）上时，需要1.58 V的低电池电压才能获得10 mAcm ^-2在60小时内总体水分解程度可忽略不计。Ni-Fe-PB的优异催化性能主要得益于金属-类金属组合的成分调制和独特的非晶结构。这项工作为水分解用的坚固的双功能催化剂的设计提供了新的见识，并可能促进多组分无定形催化剂的发展。