Bifunctionality behavior of phase controlled nickel selenides in alkaline water electrolysis application

Repurposing face mask waste to construct floating photothermal evaporator for autonomous solar ocean farming

“…We believe it is mainly attributed to the 2D water pathways and enhanced capillary exchange by the intertwined structure of FM, which guarantee sufficient water supply and ion convection between bulk water and solar evaporator to prevent salt precipitation (Figure S9). 30–40 …”

“…We believe it is mainly attributed to the 2D water pathways and enhanced capillary exchange by the intertwined structure of FM, which guarantee sufficient water supply and ion convection between bulk water and solar evaporator to prevent salt precipitation (Figure S9). [30][31][32][33][34][35][36][37][38][39][40] To further stress out the high solar desalination performance of FM-PPy, water evaporation test was carried out under 1.5, 2, and 3 suns. By monitoring mass change of 4 wt% brine solution, it's found that FM-PPy could realize 1.68 ± 0.08 kg/m 2 h, 2.35 ± 0.02 kg/m 2 h and 3.27 ± 0.13 kg/m 2 .h water evaporation under 1.5, 2 and 3 suns respectively (Supporting Figure S10A, B).…”

Atomic Layer Deposition of FeSe2, CoSe2, and NiSe2

“…For comparison purposes, the LSV and Tafel data for the state-of-the-art Pt/C electrocatalyst were also measured, as shown in Figure . To benchmark the HER performance of our ALD NiSe 2 with those NiSe 2 made by other methods (e.g., solution methods or NiO selenization ,,− ), the turnover frequency (TOF) was evaluated, as it reflects the intrinsic activity of a catalyst. − As the lower limit, the number of TOF was evaluated assuming that all of the Ni atoms in the film were catalytically active. ,, Therefore, the TOFs of the ALD NiSe 2 were calculated to be 0.109 and 0.53 s –1 at the overpotentials of 300 and 400 mV, respectively, and these numbers are quite comparable to those NiSe 2 made by other methods (Table S1), ,,− which indicates that our ALD NiSe 2 had good intrinsic HER activity. As ALD technology is renowned for uniform film coating on 3D structures with exceptional conformality, we envision that the ALD of MSe 2 will have great applications toward constructing superior 3D nanostructured electrocatalysts.…”

A trifunctional Co0.85Se/NC collaborated electrocatalyst enables a self-powered energy system for uninterrupted H2 production

“…[25][26][27] Moreover, it has been reported that selenides have lower H-desorption bond energies compared to the corresponding suldes, making them great candidates for HER electrocatalysts. 26,28 At the same time, selenides also show promising intrinsic catalytic ability for the OER, 27 and Tan et al reported the presence of localized negative charge at the Se site, and that the electronegativity of selenium is smaller than that of O element. 26,29 In addition, the ORR properties of selenides have been reported.…”