![]() (4) The theoretical voltage of water cracking is 1.23 V. (3) Electrocatalytic water cracking is divided into two half-reactions: the cathodic hydrogen evolution reaction (HER) and the anodic oxygen evolution reaction (OER). ![]() (1,2) Electrocatalytic water cracking is a promising solution for the sustainable production of hydrogen and zero carbon emission throughout the process. Hydrogen energy is considered to be the most efficient clean energy source of the 21st century due to its high combustion calorific value, nonpolluting nature, abundant sources, and sustainability, which attracts increasing attention from scientific researchers. This study provides a new strategy for the design of highly active bifunctional self-supporting electrocatalysts.ĭeveloping renewable clean energy that can replace traditional fossil energy can not only solve the global energy crisis but also contribute to environmental protection, which is also the direction that researchers have been working on for a long time. The excellent electrocatalytic performance can be attributed to the close synergy between the highly active CoP/Co 2P/NCNT and CF. We also confirmed the main driving force to improve the electron transfer between the heterostructures of Co and P by XPS spectra. Additionally, the synthesized catalysts also exhibit good long-term stability, maintaining high catalytic activity after 20 h of continuous operation. As a bifunctional electrocatalyst, CoP/Co 2P/ exhibited excellent catalytic activity for both hydrogen evolution reaction and oxygen evolution reaction in alkaline media, requiring low overpotentials of 133 and 289 mV to obtain a current density of 10 mA cm –2, respectively. In addition, the active sites of the carbon foam (CF) are greatly increased by the construction of hollow structures. ![]() ![]() Furthermore, the induced three-dimensional carbon network skeleton facilitates rapid charge transfer. In this paper, we prepared a nitrogen-doped carbon nanotube (NCNT)-enhanced three-dimensional self-supported electrocatalyst with CoP and Co 2P coexistence by a two-step strategy of high-temperature carbonization and low-temperature phosphorylation. Development of a low cost, high activity, and stable nonprecious metal bifunctional catalyst for electrocatalytic water cracking is a hot topic and big challenge. ![]()
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