Al Shahrani Mghaib, Amer Mabrook S, Alsaleh Ahmad A, Arunachalam Prabhakarn, Al-Mayouf Abdullah M
Electrochemical Sciences Research Chair (ESRC), Chemistry Department, College of Science, King Saud University P. O. Box 2455 Riyadh 11451 Saudi Arabia
RSC Adv. 2024 Oct 14;14(44):32251-32261. doi: 10.1039/d4ra05868b. eCollection 2024 Oct 9.
The fabrication of earth-abundant electrocatalysts capable of facilitating hydrogen evolution reactions (HER) is essential for creating sustainable hydrogen fuel by water splitting. Here, we present a one-pot hydrothermal approach for producing aluminum and phosphorus co-doped NiS/NiS/WS heterostructure hybrid frameworks on nickel foam. The optimal Al and Al, P/NiWS-b@NF catalyst exhibits high HER activity with overpotentials of 139 and 227 mV at current densities of 10 and 50 mA cm, respectively, thanks to the synergistic effect of the various constituents of the catalyst. What is more, it also exhibits a promising Tafel slope of 124 mV dec and is electrocatalytically durable for 10 hours in 0.5 M HSO solution. The high HER activity of Al, P/NiWS-b@NF could be explained by the large number of active sites of the hierarchical heterostructure and electron effects produced by the combination of interfacial and aluminum and phosphorus doping.
制备能够促进析氢反应（HER）的储量丰富的电催化剂对于通过水分解生产可持续氢燃料至关重要。在此，我们提出了一种一锅水热法，用于在泡沫镍上制备铝和磷共掺杂的NiS/NiS/WS异质结构混合框架。得益于催化剂各成分的协同效应，最优的Al和Al,P/NiWS-b@NF催化剂表现出高析氢活性，在电流密度为10和50 mA cm时过电位分别为139和227 mV。此外，它还具有124 mV dec的良好塔菲尔斜率，并且在0.5 M HSO溶液中具有10小时的电催化耐久性。Al,P/NiWS-b@NF的高析氢活性可以通过分级异质结构的大量活性位点以及界面与铝和磷掺杂相结合产生的电子效应来解释。
