Mghaib Al Shahrani, Mabrook S. Amer, Ahmad A. Alsaleh, Prabhakarn Arunachalam and Abdullah M. Al-Mayouf
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引用次数: 0
摘要
制备能够促进氢进化反应(HER)的富土电催化剂对于通过水分裂产生可持续氢燃料至关重要。在此,我们介绍了一种在泡沫镍上制备铝磷共掺杂 NiS/Ni3S2/WS2 异质结构杂化框架的单锅水热法。由于催化剂中各种成分的协同作用,最佳的铝和铝磷/NiWS-b@NF 催化剂表现出很高的 HER 活性,在电流密度为 10 mA cm-2 和 50 mA cm-2 时,过电位分别为 139 mV 和 227 mV。此外,它还表现出 124 mV dec-1 的良好塔菲尔斜率,并且在 0.5 M H2SO4 溶液中具有 10 小时的电催化持久性。Al、P/NiWS-b@NF 的高 HER 活性可归因于分层异质结构的大量活性位点以及界面掺杂和铝磷掺杂结合产生的电子效应。
Al, P-co-doping and interface engineering synergistically boost the electrocatalytic performance of WS2/Ni3S2/NiS nanosheet heterostructure for efficient hydrogen evolution reaction†
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/Ni3S2/WS2 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−2, 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−1 and is electrocatalytically durable for 10 hours in 0.5 M H2SO4 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.
期刊介绍:
An international, peer-reviewed journal covering all of the chemical sciences, including multidisciplinary and emerging areas. RSC Advances is a gold open access journal allowing researchers free access to research articles, and offering an affordable open access publishing option for authors around the world.