硫化物上支持的铂单原子的浸入式简易合成,用于海水电解的双功能化

Catalysts Pub Date : 2024-07-26 DOI:10.3390/catal14080477
Jian Shen, Guotao Yang, Tianshui Li, Wei Liu, Qihao Sha, Zheng Zhong, Yun Kuang
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摘要

海水电解制氢是减少生产成本的一个重要机会,在各种工业应用中具有相当大的潜力。以铂为基础的贵金属在水电解方面表现出卓越的活性。然而,其有限的储量和高昂的成本阻碍了其大规模的广泛应用。单原子催化剂具有低负载和高利用效率的特点,是一种可行的替代方法,而开发简单的合成方法则可促进其实际应用。在这项工作中,我们报告了在泡沫镍基底上采用简单的浸渍方法轻松合成单原子铂负载镍钴铁氧体(Pt@NiCoFeSx)双功能催化电极的情况。所制备的电极在碱性海水电解质中对 HER(60 mV@10 mA cm-2)和 OER(201 mV@10 mA cm-2)均表现出较低的过电位。将该电极装入海水电解槽后,在 100 小时的测试期间内,其直流电能耗仅为 4.18 kWh/Nm3H2,且衰减可忽略不计。这些发现证明了我们的方法在工业规模海水电解方面的潜力。
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Facile Immersing Synthesis of Pt Single Atoms Supported on Sulfide for Bifunctional toward Seawater Electrolysis
Seawater electrolysis for hydrogen production represents a substantial opportunity to curtail production expenditures and exhibits considerable potential for various industrial applications. Platinum-based precious metals exhibit excellent activity for water electrolysis. However, their limited reserves and high costs impede their widespread use on a large scale. Single-atom catalysts, characterized by low loading and high utilization efficiency, represent a viable alternative, and the development of simple synthesis methods can facilitate their practical application. In this work, we report the facile synthesis of a single-atom Pt-loaded NiCoFeSx (Pt@NiCoFeSx) bifunctional catalytic electrode using a simple impregnation method on a nickel foam substrate. The resulting electrode exhibits low overpotentials for both HER (60 mV@10 mA cm−2) and OER (201 mV@10 mA cm−2) in alkaline seawater electrolytes. When incorporated into a seawater electrolyzer, this electrode achieves a direct current energy consumption of only 4.18 kWh/Nm3H2 over a 100 h test period with negligible decay. These findings demonstrate the potential of our approach for industrial-scale seawater electrolysis.
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