Thermoelectric transport properties of S-doped In0.9Si0.1Se

Evaluation of alumina slurry dispersion by nuclear magnetic resonance relaxation as a comparison to conventional dispersion evaluation methods

“…Mackay et al examined the same phenomenon with spin–spin relaxation time (T 2 ) for the Ludox system, relaxation rate increases with the weight fraction of solid. [ 4 ] The results in Figure 4 show a similar pattern where relaxation time, which is inversely proportional to the relaxation rate, decreases as solid loading increases. Here, the bound liquid is considered to have an effective lower viscosity causing a decrease of both T 1 and T 2 .…”

“…In this slurry, the DISPERBYK‐111 (BYK, Germany) copolymer with acidic group dispersant was used to disperse particles, which is considered to generate an electro‐steric stabilization on the ceramic particles. [ 4 ] The slurry was dispersed by using the ball‐milling technique at 120 rpm and its viscosity, particle size, sedimentation height, and NMR relaxation time were measured to evaluate the dispersion degree of the slurry. The viscosity and particle size distribution of each sample was measured by using a viscometer (HBDV‐II + Pro, Brookfield, U.S.) and a PSA device (LA‐950 V2, Horiba, Japan) respectively.…”

“…Mackay et al reported that the nuclear magnetic resonance (NMR) relaxation method addresses these challenges in a study of the dispersion degree of ceramic slurries. [ 4 ] NMR spectroscopy is widely used to analyze the chemical structure whereas NMR relaxation measures the bulk properties of the sample. NMR relaxation is an analytical tool used to probe the molecular motions of the species adsorbed onto the particle surface.…”

Strategically designed trimetallic catalyst with minimal Ru addresses both water dissociation and hydride poisoning barriers in alkaline HER

“…The first is the availability of a wide range of OER catalysts from the cheap 3d transition metal row and the ease of making alkaline water by seawater electrolysis. 20–24 However, alkaline water electrolysis is limited by the reaction occurring on the cathode ( i.e. , HER).…”

“…The rst is the availability of a wide range of OER catalysts from the cheap 3d transition metal row and the ease of making alkaline water by seawater electrolysis. [20][21][22][23][24] However, alkaline water electrolysis is limited by the reaction occurring on the cathode (i.e., HER). 12 Alternatively, in acid, the HER is facile because the abundance of protons does not cause the catalyst to function in the tedious water dissociation.…”