Nickel foam-loaded CoP/CoFeMoP heterostructure nanoarrays as highly efficient bifunctional electrocatalysts for overall water splitting

IF 4.7 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materials Chemistry and Physics Pub Date : 2025-09-22 DOI:10.1016/j.matchemphys.2025.131604

Zhen Yang , Zhuoshu Song , Haicheng Xuan , Lvrui Li , Xiaohong Liang , Yuping Li , Long Cheng

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Abstract

Designing inexpensive and highly efficient bifunctional catalysts in electrochemical overall water splitting remains a vital challenge. Herein, a hierarchical structure of cobalt phosphide grown on polymetallic phosphides (cobalt, iron, molybdenum) nanosheets supported on a three-dimensional nickel foam (NF) substrate (CoP/CoFeMoP/NF) is fabricated via two-step hydrothermal and vapor-phase phosphorization methods. In an alkaline environment, due to the intense charge transfer between CoP and CoFeMoP and the abundant active sites induced by the phosphating process, the overpotentials required to achieve a current density of 10 mA cm⁻² only is 62.9 mV for HER and 223.9 mV for OER, respectively. While utilized as a bifunctional electrocatalyst for overall water decomposition, the CoP/CoFeMoP/NF requires a cell voltage as low as 1.56 V to attain a current density of 10 mA cm⁻² along with the prolonged stability, outperforming most non-Pt-based electrocatalysts reported hitherto. This study proposes a pioneering approach to develop high-activity and stability non-precious metal-based phosphides as bifunctional electrocatalysts for overall water decomposition.

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泡沫镍负载的CoP/ comomop异质结构纳米阵列作为高效双功能电催化剂的整体水分解

设计廉价、高效的电化学全水分解双功能催化剂仍然是一个重要的挑战。本文采用两步水热法和气相磷化法，在三维泡沫镍（NF）衬底（CoP/CoFeMoP/NF）上的多金属磷化物（钴、铁、钼）纳米片上生长磷化钴的分层结构。在碱性环境下，由于CoP和comomop之间的电荷转移强烈以及磷化过程诱导的丰富活性位点，HER和OER实现10 mA cm−2电流密度所需的过电位分别为62.9 mV和223.9 mV。作为一种双功能电催化剂，CoP/ comomop /NF需要低至1.56 V的电池电压才能达到10 mA cm - 2的电流密度，并具有较长的稳定性，优于迄今为止报道的大多数非pt基电催化剂。本研究提出了一种开发高活性和稳定性的非贵金属基磷化物作为全面水分解的双功能电催化剂的开创性方法。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Materials Chemistry and Physics 工程技术-材料科学：综合

CiteScore

8.70

自引率

4.30%

发文量

1515

审稿时长

69 days

期刊介绍： Materials Chemistry and Physics is devoted to short communications, full-length research papers and feature articles on interrelationships among structure, properties, processing and performance of materials. The Editors welcome manuscripts on thin films, surface and interface science, materials degradation and reliability, metallurgy, semiconductors and optoelectronic materials, fine ceramics, magnetics, superconductors, specialty polymers, nano-materials and composite materials.