Crystal facet and phase engineering for advanced water splitting

Abstract

Water splitting is a promising approach to producing renewable hydrogen energy with zero carbon dioxide emission, and it has been intensively studied to improve conversion efficiencies over the past decades....

In situ-grown Co3S4sheet-functionalized metal–organic frameworkviasurface engineering as a HER catalyst in alkaline media

“…Direct growth on the substrate usually generates low series resistance compared to that generated using a binder for binding to the surface of the electrode. (2) The boosting of the HER catalytic activity of the P-Co MOF/Co 3 S 4 sheet can be attributed to the binding energy of the Co ions: the higher binding energy of the Co 2+ ions and sulfur, which is partially negatively charged, results in increased attraction of hydride and protons for hydrogen evolution.…”

“…However, hydrogen is not freely present in the atmosphere and must be obtained from the splitting of hydrogen-containing compounds such as water. 2,3 Hydrogen can be produced from water in three ways: photolysis, thermolysis, and electrolysis. [4][5][6] During water splitting, hydrogen is generated at the cathode, and oxygen is generated at the anode.…”

Photocatalytic Oxidation of Carbon Monoxide Using Synergy of Redox-Separated Photocatalyst and Ozone

“…To boost the photocatalytic activity in material design, separating reduction and oxidation sites is an efficient method. Since the electronic structures and surface reactivity are different depending on crystal facets, facet-engineering can be used for separating oxidation and reduction sites [ 28 ]. Band alignment between different facets provides a route for charge carriers to separate.…”

Two-dimensional materials for photoelectrochemical water splitting

“…However, it is necessary to augment and expose them as much as possible to achieve vigorous photoelectrolysis. 71,72 Lots of studies have revealed that exceptionally active edges and defects can be induced by strain engineering, 73 plasma treatment, 74 foreign elements doping, 75 and so on. Li et al theoretically predicted and verified that elaborately strained and electrochemically generated sulfur vacancies in the basal plane of monolayer MoS 2 serve as highly active sites for hydrogen evolution reaction.…”