Surface distortion of FeRu nanoparticles improves the hydrogen evolution reaction performance in alkaline media

Abstract

Rational design of electrocatalysts, including increased catalytic surface area, unique surface structure, and improved conductivity, for facilitating hydrogen evolution reaction (HER) is emerging as an important issue. In this work,...

Tailoring Hydrogen Evolution Performance: Size and Phase Engineering of Ruthenium Nanoparticles

“…As observed from the radial distribution function R ( r ) in Figure , with increasing firing temperature, the crystalline quality improves for the isolated Ru ( P 6 3 / mmc ) particle phase. This is identified by the sharpening of the short-range correlations in the R ( r ), which results from the decrease in atomic disorder due to lattice defects, strain, and size effects as the mean diameter of the nanoparticles grows. , As size increases, the total surface area to volume ratio and number of surface defects decrease, which typically results in poorer HER performance as the total concentration of reaction sites is reduced. , This trend, however, is not observed, and as a result, the phase purity of the nanoparticle must be taken into consideration. To accomplish this, a single parameter was calculated by multiplying the surface area to volume ratio by the Ru ( P 6 3 / mmc ) phase fraction.…”

“…72,73 As size increases, the total surface area to volume ratio and number of surface defects decrease, which typically results in poorer HER performance as the total concentration of reaction sites is reduced. 74,75 This trend, however, is not observed, and as a result, the phase purity of the nanoparticle must be taken into consideration. To accomplish this, a single parameter was calculated by multiplying the surface area to volume ratio by the Ru (P6 3 / mmc) phase fraction.…”

Recent advances in mechanistic understanding and catalyst design for alkaline hydrogen evolution reactions

“…Recently, Choi and co-workers reported the distortion of the FeRu alloy surface using HF. 79 According to them, the reaction kinetics depends on the Δ G OH rather than the Δ G H* . This phenomenon was established via electrochemical CO stripping experiments.…”

Stable 1T‐MoS2 by Facile Phase Transition Synthesis for Efficient Electrocatalytic Oxygen Evolution Reaction

“…The water electrolysis involves the hydrogen evolution reaction (HER) at the cathode and oxygen evolution reaction (OER) at the anode. [14][15][16][17] Both reactions require electrocatalysts that are both efficient and economically viable. [18][19][20] While many studies have explored MoS 2 -based materials for HER, the focus on applying such materials to OER has been limited.…”