Jaerim Kim

Developing efficient and inexpensive electrocatalysts for the hydrogen evolution reaction (HER) in alkaline water electrolysis plays a key role for renewable hydrogen energy technology. The slow reaction kinetics of HER in alkaline solutions, however, has hampered advances in high-performance hydrogen production. Herein, we investigated the trends in HER activity with respect to the binding energies of Ni-based thin film catalysts by incorporating a series of oxophilic transition metal atoms. It

Pericytes enveloping the endothelium play an important role in the physiology and pathology of microvessels, especially in vessel maturation and stabilization. However, our understanding of fundamental pericyte biology is limited by the lack of a robust in vitro model system that allows researchers to evaluate the interactions among multiple cell types in perfusable blood vessels. The present work describes a microfluidic platform that can be used to investigate interactions between pericytes an

Despite the adverse effects of H₂ bubbles adhering to catalyst's surface on the performance of water electrolysis, the mechanisms by which H₂ bubbles are effectively released during the alkaline hydrogen evolution reaction (HER) remain elusive. In this study, a systematic investigation on the effect of nanoscale surface morphologies on H₂ bubble release behaviors and HER performance by employing earth-abundant Ni catalysts consisting of an array of Ni nanorods (N

Although branched WO₃ nanostructures have been investigated for electrochromic devices and catalytic electrodes, a detailed study on their structural evolution mechanism has rarely been carried out.

An array of SnO₂ nanohelix structures is employed to fabricate a SnO₂ helix@ZnFe₂ O₄ dendrite core-shell 3D heterostructure photoanode for photoelectrochemical (PEC) water splitting. The SnO₂ helix provides triple critical functions to enhance the PEC performance of the photoanode. First, it scatters the incident light to achieve a higher light harvesting efficiency. Second, it provides a facile electron pathway as an electron transfer layer

In order to realize high-efficiency PEC performance, nanostructured BiVO 4 was synthesized through oblique angle deposition and V calcination process. Nanostructured BiVO 4 maximizes surface area and light absorption through light scattering effects.

Although single-atom catalysts (SACs) are garnering significant attention due to their exceptional catalytic properties, the synthesis of SACs remains challenging due to their thermodynamic instability. Herein, stabilized Co-based SACs enabled by the ion implantation technique are presented. It is revealed that implantation of Co ions with an accelerating energy of 120 keV and a controlled fluence not only leads to the formation of stabilized Co single atoms without notable aggregation of Co ato

Hydrogen Evolution Reaction In article number 2305844, Jaerim Kim, Yong-Tae Kim, Jong Kyu Kim, and co-workers explore the impact of nanoscale surface morphologies on the release behavior of H2 bubbles and electrochemical hydrogen evolution reaction (HER) performance by introducing surface morphology-controlled Ni catalysts. The highly porous Ni catalyst, composed of an array of Ni nanorods, exhibits exceptional superaerophobic properties. This characteristic facilitates the accelerated release o

The precise decoration of bimetallic nanocrystals (NCs) with uniform size and homogeneous composition on metal oxide (MOX) surfaces is crucial for developing highly sensitive and selective MOX-based gas sensors. In this study, MOX-based gas sensors are present decorated with homogeneous Au-Pd bimetallic (Au@Pd) NCs synthesized via seed-mediated sequential reduction of Au and Pd on an array of TiO₂ nanohelices (NHs) matrix. Due to the uniform composition, size, and dispersion of the bi

Developing efficient and inexpensive electrocatalysts for the hydrogen evolution reaction (HER) in alkaline water electrolysis plays a key role for renewable hydrogen energy technology. The slow reaction kinetics of HER in alkaline solutions, however, has hampered advances in high-performance hydrogen production. Herein, we investigated the trends in HER activity with respect to the binding energies of Ni-based thin film catalysts by incorporating a series of oxophilic transition metal atoms. It

Developing efficient and inexpensive electrocatalysts for the hydrogen evolution reaction (HER) in alkaline water electrolysis plays a key role for renewable hydrogen energy technology. The slow reaction kinetics of HER in alkaline solutions, however, has hampered advances in high-performance hydrogen production. Herein, we investigated the trends in HER activity with respect to the binding energies of Ni-based thin film catalysts by incorporating a series of oxophilic transition metal atoms. It