Xiangdong Yao

TL;DR: A facile solution reduction method using NaBH4 as a reductant is developed to prepare iron-cobalt oxide nanosheets (Fex Coy -ONSs) with a large specific surface area, ultrathin thickness, and, importantly, abundant oxygen vacancies that could improve electronic conductivity and facilitate adsorption of H2 O onto nearby Co3+ sites.

TL;DR: Density function theory calculations further reveal that the different types of defects are essential for the individual electrocatalytic activity for ORR, OER, and HER, respectively.

TL;DR: The authors demonstrate a heterostructured NiFe LDH-NS@DG10 hybrid catalyst by coupling of exfoliated Ni-Fe layered double hydroxide (LDH) nanosheet (NS) and defective graphene (DG).

TL;DR: In this article, a concept whereby graphene defects trap atomic Ni species inside to form an integrity (aNi@defect) was reported, and the derived catalyst exhibits exceptionally good activity for both HER and OER, e.g., an overpotential of 70 mV at 10 mA/cm2 for HER (analogous to the commercial Pt/C) and 270 mV for OER (much superior to that of Ir oxide).

TL;DR: This work synthesizes a nickel–carbon-based catalyst, from carbonization of metal-organic frameworks, to replace currently best-known platinum-based materials for electrocatalytic hydrogen evolution, exhibiting highly efficient hydrogen evolution performance with high exchange current density and impressive durability.